diff --git a/package-lock.json b/package-lock.json
index aeb9867799..908e608622 100644
--- a/package-lock.json
+++ b/package-lock.json
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-        "node-opcua-data-model": "2.74.0",
-        "node-opcua-data-value": "2.74.0",
-        "node-opcua-date-time": "2.74.0",
-        "node-opcua-debug": "2.74.0",
-        "node-opcua-enum": "2.74.0",
-        "node-opcua-extension-object": "2.74.0",
-        "node-opcua-factory": "2.74.0",
-        "node-opcua-hostname": "2.74.0",
-        "node-opcua-nodeid": "2.74.0",
-        "node-opcua-nodeset-ua": "2.74.0",
-        "node-opcua-nodesets": "2.74.0",
-        "node-opcua-numeric-range": "2.74.0",
-        "node-opcua-object-registry": "2.74.0",
-        "node-opcua-pki": "^2.17.0",
-        "node-opcua-secure-channel": "2.74.0",
-        "node-opcua-service-browse": "2.74.0",
-        "node-opcua-service-call": "2.74.0",
-        "node-opcua-service-discovery": "2.74.0",
-        "node-opcua-service-endpoints": "2.74.0",
-        "node-opcua-service-filter": "2.74.0",
-        "node-opcua-service-history": "2.74.0",
-        "node-opcua-service-node-management": "2.74.0",
-        "node-opcua-service-query": "2.74.0",
-        "node-opcua-service-read": "2.74.0",
-        "node-opcua-service-register-node": "2.74.0",
-        "node-opcua-service-secure-channel": "2.74.0",
-        "node-opcua-service-session": "2.74.0",
-        "node-opcua-service-subscription": "2.74.0",
-        "node-opcua-service-translate-browse-path": "2.74.0",
-        "node-opcua-service-write": "2.74.0",
-        "node-opcua-status-code": "2.74.0",
-        "node-opcua-transport": "2.74.0",
-        "node-opcua-types": "2.74.0",
-        "node-opcua-utils": "2.74.0",
-        "node-opcua-variant": "2.74.0"
-      }
-    },
-    "node-opcua-server-discovery": {
-      "version": "2.74.0",
-      "resolved": "https://registry.npmjs.org/node-opcua-server-discovery/-/node-opcua-server-discovery-2.74.0.tgz",
-      "integrity": "sha512-dCuTbNsVmq4UU+pQo1a7nD7U7+sjNY8xjXkQqOZ4yTN6qybU5/fwH5aYM87V53ppTBon1D/xg305kV8XSfFJtg==",
-      "requires": {
-        "@types/bonjour": "^3.5.10",
-        "node-opcua-assert": "2.74.0",
-        "node-opcua-basic-types": "2.74.0",
-        "node-opcua-certificate-manager": "2.74.0",
-        "node-opcua-common": "2.74.0",
-        "node-opcua-debug": "2.74.0",
-        "node-opcua-hostname": "2.74.0",
-        "node-opcua-object-registry": "2.74.0",
-        "node-opcua-pki": "^2.17.0",
-        "node-opcua-secure-channel": "2.74.0",
-        "node-opcua-server": "2.74.0",
-        "node-opcua-service-discovery": "2.74.0",
-        "node-opcua-service-endpoints": "2.74.0",
-        "node-opcua-status-code": "2.74.0",
-        "sterfive-bonjour-service": "1.1.4"
-      }
-    },
     "node-opcua-service-browse": {
       "version": "2.74.0",
       "resolved": "https://registry.npmjs.org/node-opcua-service-browse/-/node-opcua-service-browse-2.74.0.tgz",
@@ -33766,22 +32640,6 @@
         "node-opcua-types": "2.74.0"
       }
     },
-    "node-opcua-service-node-management": {
-      "version": "2.74.0",
-      "resolved": "https://registry.npmjs.org/node-opcua-service-node-management/-/node-opcua-service-node-management-2.74.0.tgz",
-      "integrity": "sha512-kaDDaux3kNqpFNTB8HBTeek3Exk9LKijMXc7jfaHQ8Xb4iwBbLd5dGLI3hBNa4SOI4PI4lQvTqRnk6l6KSm0tg==",
-      "requires": {
-        "node-opcua-assert": "2.74.0",
-        "node-opcua-basic-types": "2.74.0",
-        "node-opcua-binary-stream": "2.74.0",
-        "node-opcua-data-model": "2.74.0",
-        "node-opcua-extension-object": "2.74.0",
-        "node-opcua-factory": "2.74.0",
-        "node-opcua-nodeid": "2.74.0",
-        "node-opcua-service-secure-channel": "2.74.0",
-        "node-opcua-types": "2.74.0"
-      }
-    },
     "node-opcua-service-query": {
       "version": "2.74.0",
       "resolved": "https://registry.npmjs.org/node-opcua-service-query/-/node-opcua-service-query-2.74.0.tgz",
@@ -34088,20 +32946,6 @@
         "node-opcua-utils": "2.74.0"
       }
     },
-    "node-opcua-vendor-diagnostic": {
-      "version": "2.74.0",
-      "resolved": "https://registry.npmjs.org/node-opcua-vendor-diagnostic/-/node-opcua-vendor-diagnostic-2.74.0.tgz",
-      "integrity": "sha512-xfTqiO5PwrDJQiCXy0LuwDOziIPDoKd2UphBHxia1gHWxvgWwQ0UbM8wzWIr6qjccfQSaKcJS67oBnPtZAPO8g==",
-      "requires": {
-        "humanize": "0.0.9",
-        "node-opcua-address-space": "2.74.0",
-        "node-opcua-assert": "2.74.0",
-        "node-opcua-constants": "2.74.0",
-        "node-opcua-server": "2.74.0",
-        "node-opcua-status-code": "2.74.0",
-        "node-opcua-variant": "2.74.0"
-      }
-    },
     "node-opcua-xml2json": {
       "version": "2.74.0",
       "resolved": "https://registry.npmjs.org/node-opcua-xml2json/-/node-opcua-xml2json-2.74.0.tgz",
@@ -36092,11 +34936,6 @@
       "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
       "integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw=="
     },
-    "set-prototype-of": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/set-prototype-of/-/set-prototype-of-1.0.0.tgz",
-      "integrity": "sha512-OeTRSF+prexqa0ZOjfYR2pdGG/9nyzoXhsDj9M/0R8cgK1r9SkiQiqGdQQcObmnalKVPaTLrF8P71OacYqcYGw=="
-    },
     "setprototypeof": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
diff --git a/package.json b/package.json
index 3ea065a74e..92504bad19 100644
--- a/package.json
+++ b/package.json
@@ -72,8 +72,8 @@
     "mysql2": "2.3.3",
     "nanoid": "3.3.4",
     "node-fetch": "2.6.7",
-    "node-opcua": "2.74.0",
     "node-opcua-certificate-manager": "2.74.0",
+    "node-opcua-client": "2.74.0",
     "object-path": "0.11.8",
     "papaparse": "5.3.2",
     "pg": "8.7.3",
diff --git a/src/engine/OIBusEngine.class.js b/src/engine/OIBusEngine.class.js
index 66975f41ab..bb4315d374 100644
--- a/src/engine/OIBusEngine.class.js
+++ b/src/engine/OIBusEngine.class.js
@@ -263,7 +263,7 @@ class OIBusEngine extends BaseEngine {
     }) => {
       if (scanMode !== 'listen') {
         const job = timexe(cronTime, () => {
-          // on each scan, activate each protocols
+          // on each scan, activate each protocol
           this.scanLists[scanMode].forEach(async (id) => {
             await this.activeProtocols[id].onScan(scanMode)
           })
diff --git a/src/south/OPCUA/OPCUA_DA/OPCUA_DA.class.js b/src/south/OPCUA/OPCUA_DA/OPCUA_DA.class.js
index e9c2cd4e76..47dae13f71 100644
--- a/src/south/OPCUA/OPCUA_DA/OPCUA_DA.class.js
+++ b/src/south/OPCUA/OPCUA_DA/OPCUA_DA.class.js
@@ -1,4 +1,9 @@
-const Opcua = require('node-opcua')
+const {
+  OPCUAClient,
+  MessageSecurityMode,
+  SecurityPolicy,
+  UserTokenType,
+} = require('node-opcua-client')
 const { OPCUACertificateManager } = require('node-opcua-certificate-manager')
 const ProtocolHandler = require('../../ProtocolHandler.class')
 const { initOpcuaCertificateFolders } = require('../opcua.service')
@@ -54,6 +59,7 @@ class OPCUA_DA extends ProtocolHandler {
    */
   async connect() {
     await super.connect()
+    await this.session?.close() // close the session if it already exists
     await this.connectToOpcuaServer()
   }
 
@@ -61,7 +67,10 @@ class OPCUA_DA extends ProtocolHandler {
     await super.init()
     await initOpcuaCertificateFolders(this.encryptionService.certsFolder)
     if (!this.clientCertificateManager) {
-      this.clientCertificateManager = new OPCUACertificateManager({ rootFolder: `${this.encryptionService.certsFolder}/opcua` })
+      this.clientCertificateManager = new OPCUACertificateManager({
+        rootFolder: `${this.encryptionService.certsFolder}/opcua`,
+        automaticallyAcceptUnknownCertificate: true,
+      })
       // Set the state to the CertificateManager to 2 (Initialized) to avoid a call to openssl
       // It is useful for offline instances of OIBus where downloading openssl is not possible
       this.clientCertificateManager.state = 2
@@ -131,8 +140,8 @@ class OPCUA_DA extends ProtocolHandler {
     }
 
     if (this.connected) {
-      await this.session.close()
-      await this.client.disconnect()
+      await this.session?.close()
+      this.session = null
     }
     await super.disconnect()
   }
@@ -147,7 +156,7 @@ class OPCUA_DA extends ProtocolHandler {
       return
     }
 
-    this.subscription = Opcua.ClientSubscription.create(this.session, {
+    this.subscription = ClientSubscription.create(this.session, {
       requestedPublishingInterval: 150,
       requestedLifetimeCount: 10 * 60 * 10,
       requestedMaxKeepAliveCount: 10,
@@ -156,18 +165,18 @@ class OPCUA_DA extends ProtocolHandler {
       priority: 6,
     })
     nodesToMonitor.forEach((nodeToMonitor) => {
-      const monitoredItem = Opcua.ClientMonitoredItem.create(
+      const monitoredItem = ClientMonitoredItem.create(
         this.subscription,
         {
           nodeId: nodeToMonitor,
-          attributeId: Opcua.AttributeIds.Value,
+          attributeId: AttributeIds.Value,
         },
         {
           samplingInterval: 2,
           discardOldest: true,
           queueSize: 1,
         },
-        Opcua.TimestampsToReturn.Neither,
+        TimestampsToReturn.Neither,
       )
 
       monitoredItem.on('changed', (dataValue) => this.manageDataValues([dataValue], nodesToMonitor))
@@ -194,38 +203,37 @@ class OPCUA_DA extends ProtocolHandler {
       const options = {
         applicationName: 'OIBus',
         connectionStrategy,
-        securityMode: Opcua.MessageSecurityMode[this.securityMode],
-        securityPolicy: Opcua.SecurityPolicy[this.securityPolicy],
+        securityMode: MessageSecurityMode[this.securityMode],
+        securityPolicy: SecurityPolicy[this.securityPolicy],
         endpointMustExist: false,
         keepSessionAlive: this.keepSessionAlive,
+        keepPendingSessionsOnDisconnect: false,
         clientName: this.clientName, // the id of the connector
         clientCertificateManager: this.clientCertificateManager,
       }
-      this.client = Opcua.OPCUAClient.create(options)
-      await this.client.connect(this.url)
-      let userIdentity = null
+      let userIdentity
       if (this.certificate.privateKey && this.certificate.cert) {
         userIdentity = {
-          type: Opcua.UserTokenType.Certificate,
+          type: UserTokenType.Certificate,
           certificateData: this.certificate.cert,
           privateKey: Buffer.from(this.certificate.privateKey, 'utf-8').toString(),
         }
       } else if (this.username) {
         userIdentity = {
-          type: Opcua.UserTokenType.UserName,
+          type: UserTokenType.UserName,
           userName: this.username,
           password: this.encryptionService.decryptText(this.password),
         }
+      } else {
+        userIdentity = { type: UserTokenType.Anonymous }
       }
-      this.session = await this.client.createSession(userIdentity)
+      this.session = await OPCUAClient.createSession(this.url, userIdentity, options)
       this.connected = true
-      this.logger.info('OPCUA_DA Connected')
+      this.logger.info(`OPCUA_DA ${this.dataSource.name} connected`)
       this.updateStatusDataStream({ 'Connected at': new Date().toISOString() })
     } catch (error) {
       this.logger.error(error)
-      if (this.reconnectTimeout) {
-        clearTimeout(this.reconnectTimeout)
-      }
+      await this.disconnect()
       this.reconnectTimeout = setTimeout(this.connectToOpcuaServer.bind(this), this.retryInterval)
     }
   }
diff --git a/src/south/OPCUA/OPCUA_DA/OPCUA_DA.class.spec.js b/src/south/OPCUA/OPCUA_DA/OPCUA_DA.class.spec.js
index 95a313e2cb..1974a4f08d 100644
--- a/src/south/OPCUA/OPCUA_DA/OPCUA_DA.class.spec.js
+++ b/src/south/OPCUA/OPCUA_DA/OPCUA_DA.class.spec.js
@@ -1,14 +1,14 @@
-const Opcua = require('node-opcua')
+const Opcua = require('node-opcua-client')
 const OPCUA_DA = require('./OPCUA_DA.class')
 const { defaultConfig: config } = require('../../../../tests/testConfig')
 const EncryptionService = require('../../../services/EncryptionService.class')
 
 // Mock node-opcua
-jest.mock('node-opcua', () => ({
-  OPCUAClient: { create: jest.fn() },
+jest.mock('node-opcua-client', () => ({
+  OPCUAClient: { createSession: jest.fn() },
   MessageSecurityMode: { None: 1 },
   SecurityPolicy: { None: 'http://opcfoundation.org/UA/SecurityPolicy#None' },
-  UserTokenType: { UserName: 1, Certificate: 2 },
+  UserTokenType: { Anonymous: 0, UserName: 1, Certificate: 2 },
 }))
 jest.mock('node-opcua-certificate-manager', () => ({ OPCUACertificateManager: jest.fn(() => ({})) }))
 
@@ -70,18 +70,8 @@ beforeEach(async () => {
 
 describe('OPCUA-DA south', () => {
   it('should be properly initialized', () => {
-    expect(opcuaSouth.url)
-      .toEqual(opcuaConfig.OPCUA_DA.url)
-    expect(opcuaSouth.retryInterval)
-      .toEqual(opcuaConfig.OPCUA_DA.retryInterval)
-  })
-
-  it('should properly connect and set lastCompletedAt from database', async () => {
-    opcuaSouth.connectToOpcuaServer = jest.fn()
-    await opcuaSouth.connect()
-
-    expect(opcuaSouth.connectToOpcuaServer)
-      .toHaveBeenCalledTimes(1)
+    expect(opcuaSouth.url).toEqual(opcuaConfig.OPCUA_DA.url)
+    expect(opcuaSouth.retryInterval).toEqual(opcuaConfig.OPCUA_DA.retryInterval)
   })
 
   it('should properly connect to OPC UA server without password', async () => {
@@ -97,25 +87,16 @@ describe('OPCUA-DA south', () => {
       securityPolicy: Opcua.SecurityPolicy.None,
       endpointMustExist: false,
       keepSessionAlive: false,
+      keepPendingSessionsOnDisconnect: false,
       clientCertificateManager: { state: 2 },
     }
-    Opcua.OPCUAClient.create.mockReturnValue({
-      connect: jest.fn().mockReturnValue({}),
-      createSession: jest.fn().mockReturnValue({}),
-    })
+    const expectedUserIdentity = { type: 0 }
     await opcuaSouth.connect()
 
-    expect(Opcua.OPCUAClient.create)
-      .toBeCalledWith(expectedOptions)
-    expect(opcuaSouth.client.connect)
-      .toBeCalledWith(opcuaConfig.OPCUA_DA.url)
-    expect(opcuaSouth.client.createSession)
-      .toBeCalledTimes(1)
-    expect(opcuaSouth.connected)
-      .toBeTruthy()
-    expect(setTimeoutSpy)
-      .not
-      .toBeCalled()
+    expect(Opcua.OPCUAClient.createSession).toBeCalledTimes(1)
+    expect(Opcua.OPCUAClient.createSession).toBeCalledWith(opcuaSouth.url, expectedUserIdentity, expectedOptions)
+    expect(opcuaSouth.connected).toBeTruthy()
+    expect(setTimeoutSpy).not.toBeCalled()
   })
 
   it('should properly connect to OPC UA server with password', async () => {
@@ -131,12 +112,9 @@ describe('OPCUA-DA south', () => {
       securityPolicy: Opcua.SecurityPolicy.None,
       endpointMustExist: false,
       keepSessionAlive: false,
+      keepPendingSessionsOnDisconnect: false,
       clientCertificateManager: { state: 2 },
     }
-    Opcua.OPCUAClient.create.mockReturnValue({
-      connect: jest.fn(),
-      createSession: jest.fn(),
-    })
     opcuaSouth.username = 'username'
     opcuaSouth.password = 'password'
 
@@ -149,52 +127,21 @@ describe('OPCUA-DA south', () => {
       userName: 'username',
       password: 'password',
     }
-    expect(Opcua.OPCUAClient.create)
-      .toBeCalledWith(expectedOptions)
-    expect(opcuaSouth.client.connect)
-      .toBeCalledWith(opcuaConfig.OPCUA_DA.url)
-    expect(opcuaSouth.client.createSession)
-      .toBeCalledWith(expectedUserIdentity)
-    expect(opcuaSouth.connected)
-      .toBeTruthy()
-    expect(setTimeoutSpy)
-      .not
-      .toBeCalled()
+    expect(Opcua.OPCUAClient.createSession).toBeCalledWith(opcuaSouth.url, expectedUserIdentity, expectedOptions)
+    expect(opcuaSouth.connected).toBeTruthy()
+    expect(setTimeoutSpy).not.toBeCalled()
   })
 
   it('should properly retry connection to OPC UA server', async () => {
     const setTimeoutSpy = jest.spyOn(global, 'setTimeout')
-    const expectedOptions = {
-      applicationName: 'OIBus',
-      clientName: 'myConnectorId',
-      connectionStrategy: {
-        initialDelay: 1000,
-        maxRetry: 1,
-      },
-      securityMode: Opcua.MessageSecurityMode.None,
-      securityPolicy: Opcua.SecurityPolicy.None,
-      endpointMustExist: false,
-      keepSessionAlive: false,
-      clientCertificateManager: { state: 2 },
-    }
-    Opcua.OPCUAClient.create.mockReturnValue({
-      connect: jest.fn(() => Promise.reject()),
-      createSession: jest.fn(),
-    })
 
+    Opcua.OPCUAClient.createSession.mockReturnValue(new Promise((resolve, reject) => {
+      reject(new Error('test'))
+    }))
     await opcuaSouth.connect()
 
-    expect(Opcua.OPCUAClient.create)
-      .toBeCalledWith(expectedOptions)
-    expect(opcuaSouth.client.connect)
-      .toBeCalledWith(opcuaConfig.OPCUA_DA.url)
-    expect(opcuaSouth.client.createSession)
-      .not
-      .toBeCalled()
-    expect(opcuaSouth.connected)
-      .toBeFalsy()
-    expect(setTimeoutSpy)
-      .toHaveBeenLastCalledWith(expect.any(Function), opcuaConfig.OPCUA_DA.retryInterval)
+    expect(opcuaSouth.connected).toBeFalsy()
+    expect(setTimeoutSpy).toHaveBeenLastCalledWith(expect.any(Function), opcuaConfig.OPCUA_DA.retryInterval)
   })
 
   it('should quit onScan if not connected', async () => {
@@ -203,9 +150,7 @@ describe('OPCUA-DA south', () => {
     opcuaSouth.session = { readHistoryValue: jest.fn() }
     await opcuaSouth.lastPointQuery(opcuaConfig.points[0].scanMode)
 
-    expect(opcuaSouth.session.readHistoryValue)
-      .not
-      .toBeCalled()
+    expect(opcuaSouth.session.readHistoryValue).not.toBeCalled()
   })
 
   it('should quit onScan if scanMode has no points to read', async () => {
@@ -225,9 +170,7 @@ describe('OPCUA-DA south', () => {
     opcuaSouthTest.session = { readVariableValue: jest.fn() }
     await opcuaSouthTest.lastPointQuery(opcuaConfig.points[0].scanMode)
 
-    expect(opcuaSouthTest.session.readVariableValue)
-      .not
-      .toBeCalled()
+    expect(opcuaSouthTest.session.readVariableValue).not.toBeCalled()
   })
 
   it('should properly call readVariableValue() and addValues()', async () => {
@@ -246,67 +189,46 @@ describe('OPCUA-DA south', () => {
     opcuaSouth.addValues = jest.fn()
     await opcuaSouth.lastPointQuery(opcuaConfig.points[0].scanMode)
 
-    expect(opcuaSouth.session.readVariableValue)
-      .toBeCalledWith(['ns=3;s=Random'])
-    expect(opcuaSouth.addValues)
-      .toBeCalledWith([
-        {
-          data: {
-            quality: JSON.stringify({ value: 0 }),
-            value: 666,
-          },
-          pointId: 'Random',
-          timestamp: new Date(nowDateString).toISOString(),
+    expect(opcuaSouth.session.readVariableValue).toBeCalledWith(['ns=3;s=Random'])
+    expect(opcuaSouth.addValues).toBeCalledWith([
+      {
+        data: {
+          quality: JSON.stringify({ value: 0 }),
+          value: 666,
         },
-      ])
+        pointId: 'Random',
+        timestamp: new Date(nowDateString).toISOString(),
+      },
+    ])
 
     global.Date = RealDate
   })
 
   it('should properly disconnect when trying to connect', async () => {
     const clearTimeoutSpy = jest.spyOn(global, 'clearTimeout')
-    Opcua.OPCUAClient.create.mockReturnValue({
-      connect: jest.fn(),
-      createSession: jest.fn(),
-      disconnect: jest.fn(),
-    })
 
     await opcuaSouth.connect()
     opcuaSouth.reconnectTimeout = true
     opcuaSouth.connected = false
-    opcuaSouth.session = { close: jest.fn() }
+    const close = jest.fn()
+    opcuaSouth.session = { close }
     await opcuaSouth.disconnect()
 
-    expect(clearTimeoutSpy)
-      .toBeCalled()
-    expect(opcuaSouth.session.close)
-      .not
-      .toBeCalled()
-    expect(opcuaSouth.client.disconnect)
-      .not
-      .toBeCalled()
+    expect(clearTimeoutSpy).toBeCalled()
+    expect(close).not.toBeCalled()
   })
 
   it('should properly disconnect when connected', async () => {
     const clearTimeoutSpy = jest.spyOn(global, 'clearTimeout')
-    Opcua.OPCUAClient.create.mockReturnValue({
-      connect: jest.fn(),
-      createSession: jest.fn(),
-      disconnect: jest.fn(),
-    })
 
     await opcuaSouth.connect()
     opcuaSouth.reconnectTimeout = false
     opcuaSouth.connected = true
-    opcuaSouth.session = { close: jest.fn() }
+    const close = jest.fn()
+    opcuaSouth.session = { close }
     await opcuaSouth.disconnect()
 
-    expect(clearTimeoutSpy)
-      .not
-      .toBeCalled()
-    expect(opcuaSouth.session.close)
-      .toBeCalled()
-    expect(opcuaSouth.client.disconnect)
-      .toBeCalled()
+    expect(clearTimeoutSpy).not.toBeCalled()
+    expect(close).toBeCalled()
   })
 })
diff --git a/src/south/OPCUA/OPCUA_HA/OPCUA_HA.class.js b/src/south/OPCUA/OPCUA_HA/OPCUA_HA.class.js
index 45ee4f06e0..bab5b95c7e 100644
--- a/src/south/OPCUA/OPCUA_HA/OPCUA_HA.class.js
+++ b/src/south/OPCUA/OPCUA_HA/OPCUA_HA.class.js
@@ -1,5 +1,17 @@
-const Opcua = require('node-opcua')
+const {
+  OPCUAClient,
+  MessageSecurityMode,
+  SecurityPolicy,
+  TimestampsToReturn,
+  StatusCodes,
+  UserTokenType,
+  ReadProcessedDetails,
+  ReadRawModifiedDetails,
+  HistoryReadRequest,
+  AggregateFunction,
+} = require('node-opcua-client')
 const { OPCUACertificateManager } = require('node-opcua-certificate-manager')
+
 const ProtocolHandler = require('../../ProtocolHandler.class')
 const { initOpcuaCertificateFolders, MAX_NUMBER_OF_NODE_TO_LOG } = require('../opcua.service')
 
@@ -68,6 +80,7 @@ class OPCUA_HA extends ProtocolHandler {
    */
   async connect() {
     await super.connect()
+    await this.session?.close() // close the session if it already exists
     await this.connectToOpcuaServer()
   }
 
@@ -75,7 +88,10 @@ class OPCUA_HA extends ProtocolHandler {
     await super.init()
     await initOpcuaCertificateFolders(this.encryptionService.certsFolder)
     if (!this.clientCertificateManager) {
-      this.clientCertificateManager = new OPCUACertificateManager({ rootFolder: `${this.encryptionService.certsFolder}/opcua` })
+      this.clientCertificateManager = new OPCUACertificateManager({
+        rootFolder: `${this.encryptionService.certsFolder}/opcua`,
+        automaticallyAcceptUnknownCertificate: true,
+      })
       // Set the state to the CertificateManager to 2 (Initialized) to avoid a call to openssl
       // It is useful for offline instances of OIBus where downloading openssl is not possible
       this.clientCertificateManager.state = 2
@@ -149,14 +165,14 @@ class OPCUA_HA extends ProtocolHandler {
         }
         // we use the same aggregate for all nodes (OPCUA allows to have a different one for each)
         const aggregateType = Array(nodesToRead.length).fill(options.aggregateFn)
-        historyReadDetails = new Opcua.ReadProcessedDetails({
+        historyReadDetails = new ReadProcessedDetails({
           aggregateType,
           endTime,
           processingInterval: options.processingInterval,
           startTime,
         })
       } else {
-        historyReadDetails = new Opcua.ReadRawModifiedDetails({
+        historyReadDetails = new ReadRawModifiedDetails({
           endTime,
           isReadModified: false,
           numValuesPerNode,
@@ -164,16 +180,16 @@ class OPCUA_HA extends ProtocolHandler {
           startTime,
         })
       }
-      const request = new Opcua.HistoryReadRequest({
+      const request = new HistoryReadRequest({
         historyReadDetails,
         nodesToRead,
         releaseContinuationPoints: false,
-        timestampsToReturn: Opcua.TimestampsToReturn.Both,
+        timestampsToReturn: TimestampsToReturn.Both,
       })
       if (options?.timeout) request.requestHeader.timeoutHint = options.timeout
       // eslint-disable-next-line no-await-in-loop
       const response = await this.session.performMessageTransaction(request)
-      if (response?.responseHeader.serviceResult.isNot(Opcua.StatusCodes.Good)) {
+      if (response?.responseHeader.serviceResult.isNot(StatusCodes.Good)) {
         this.logger.error(new Error(response.responseHeader.serviceResult.toString()))
       }
       if (response?.results) {
@@ -213,11 +229,11 @@ class OPCUA_HA extends ProtocolHandler {
       indexRange: undefined,
       nodeId: node.nodeId,
     }))
-    const response = await this.session.performMessageTransaction(new Opcua.HistoryReadRequest({
+    const response = await this.session.performMessageTransaction(new HistoryReadRequest({
       historyReadDetails,
       nodesToRead,
       releaseContinuationPoints: true,
-      timestampsToReturn: Opcua.TimestampsToReturn.Both,
+      timestampsToReturn: TimestampsToReturn.Both,
     }))
 
     if (response.responseHeader.serviceResult._value !== 0) {
@@ -226,7 +242,7 @@ class OPCUA_HA extends ProtocolHandler {
 
     Object.keys(logs).forEach((statusCode) => {
       switch (statusCode) {
-        case Opcua.StatusCodes.BadIndexRangeNoData: // No data exists for the requested time range or event filter.
+        case StatusCodes.BadIndexRangeNoData: // No data exists for the requested time range or event filter.
         default:
           if (logs[statusCode].affectedNodes.length > MAX_NUMBER_OF_NODE_TO_LOG) {
             this.logger.debug(`${logs[statusCode].description} (${statusCode}): [${
@@ -283,16 +299,16 @@ class OPCUA_HA extends ProtocolHandler {
       }
       switch (scanGroup.aggregate) {
         case 'Average':
-          options.aggregateFn = Opcua.AggregateFunction.Average
+          options.aggregateFn = AggregateFunction.Average
           break
         case 'Minimum':
-          options.aggregateFn = Opcua.AggregateFunction.Minimum
+          options.aggregateFn = AggregateFunction.Minimum
           break
         case 'Maximum':
-          options.aggregateFn = Opcua.AggregateFunction.Maximum
+          options.aggregateFn = AggregateFunction.Maximum
           break
         case 'Count':
-          options.aggregateFn = Opcua.AggregateFunction.Count
+          options.aggregateFn = AggregateFunction.Count
           break
         case 'Raw':
           break
@@ -382,8 +398,8 @@ class OPCUA_HA extends ProtocolHandler {
     }
 
     if (this.connected) {
-      await this.session.close()
-      await this.client.disconnect()
+      await this.session?.close()
+      this.session = null
     }
     await super.disconnect()
   }
@@ -402,40 +418,38 @@ class OPCUA_HA extends ProtocolHandler {
       const options = {
         applicationName: 'OIBus',
         connectionStrategy,
-        securityMode: Opcua.MessageSecurityMode[this.securityMode],
-        securityPolicy: Opcua.SecurityPolicy[this.securityPolicy],
+        securityMode: MessageSecurityMode[this.securityMode],
+        securityPolicy: SecurityPolicy[this.securityPolicy],
         endpointMustExist: false,
         keepSessionAlive: this.keepSessionAlive,
+        keepPendingSessionsOnDisconnect: false,
         clientName: this.clientName, // the id of the connector
         clientCertificateManager: this.clientCertificateManager,
       }
 
-      this.client = Opcua.OPCUAClient.create(options)
-      await this.client.connect(this.url)
-      let userIdentity = null
+      let userIdentity
       if (this.certificate.privateKey && this.certificate.cert) {
         userIdentity = {
-          type: Opcua.UserTokenType.Certificate,
+          type: UserTokenType.Certificate,
           certificateData: this.certificate.cert,
-          privateKey: Buffer.from(this.certificate.privateKey, 'utf-8')
-            .toString(),
+          privateKey: Buffer.from(this.certificate.privateKey, 'utf-8').toString(),
         }
       } else if (this.username) {
         userIdentity = {
-          type: Opcua.UserTokenType.UserName,
+          type: UserTokenType.UserName,
           userName: this.username,
           password: this.encryptionService.decryptText(this.password),
         }
+      } else {
+        userIdentity = { type: UserTokenType.Anonymous }
       }
-      this.session = await this.client.createSession(userIdentity)
+      this.session = await OPCUAClient.createSession(this.url, userIdentity, options)
       this.connected = true
-      this.logger.info('OPCUA_HA Connected')
+      this.logger.info(`OPCUA_HA ${this.dataSource.name} connected`)
       this.updateStatusDataStream({ 'Connected at': new Date().toISOString() })
     } catch (error) {
       this.logger.error(error)
-      if (this.reconnectTimeout) {
-        clearTimeout(this.reconnectTimeout)
-      }
+      await this.disconnect()
       this.reconnectTimeout = setTimeout(this.connectToOpcuaServer.bind(this), this.retryInterval)
     }
   }
diff --git a/src/south/OPCUA/OPCUA_HA/OPCUA_HA.class.spec.js b/src/south/OPCUA/OPCUA_HA/OPCUA_HA.class.spec.js
index ffd47c168c..b83e25061c 100644
--- a/src/south/OPCUA/OPCUA_HA/OPCUA_HA.class.spec.js
+++ b/src/south/OPCUA/OPCUA_HA/OPCUA_HA.class.spec.js
@@ -1,4 +1,4 @@
-const Opcua = require('node-opcua')
+const Opcua = require('node-opcua-client')
 const OPCUA_HA = require('./OPCUA_HA.class')
 
 const { defaultConfig: config } = require('../../../../tests/testConfig')
@@ -7,11 +7,11 @@ const databaseService = require('../../../services/database.service')
 const EncryptionService = require('../../../services/EncryptionService.class')
 
 // Mock node-opcua
-jest.mock('node-opcua', () => ({
-  OPCUAClient: { create: jest.fn() },
+jest.mock('node-opcua-client', () => ({
+  OPCUAClient: { createSession: jest.fn() },
   MessageSecurityMode: { None: 1 },
   SecurityPolicy: { None: 'http://opcfoundation.org/UA/SecurityPolicy#None' },
-  UserTokenType: { UserName: 1, Certificate: 2 },
+  UserTokenType: { Anonymous: 0, UserName: 1, Certificate: 2 },
 }))
 
 jest.mock('node-opcua-certificate-manager', () => ({ OPCUACertificateManager: jest.fn(() => ({})) }))
@@ -93,14 +93,10 @@ beforeEach(async () => {
 
 describe('OPCUA-HA south', () => {
   it('should be properly initialized', () => {
-    expect(opcuaSouth.url)
-      .toEqual(opcuaConfig.OPCUA_HA.url)
-    expect(opcuaSouth.retryInterval)
-      .toEqual(opcuaConfig.OPCUA_HA.retryInterval)
-    expect(opcuaSouth.maxReadInterval)
-      .toEqual(opcuaConfig.OPCUA_HA.maxReadInterval)
-    expect(opcuaSouth.reconnectTimeout)
-      .toBeNull()
+    expect(opcuaSouth.url).toEqual(opcuaConfig.OPCUA_HA.url)
+    expect(opcuaSouth.retryInterval).toEqual(opcuaConfig.OPCUA_HA.retryInterval)
+    expect(opcuaSouth.maxReadInterval).toEqual(opcuaConfig.OPCUA_HA.maxReadInterval)
+    expect(opcuaSouth.reconnectTimeout).toBeNull()
   })
 
   it('should properly connect and set lastCompletedAt from database', async () => {
@@ -108,21 +104,14 @@ describe('OPCUA-HA south', () => {
     opcuaSouth.connectToOpcuaServer = jest.fn()
     await opcuaSouth.connect()
 
-    expect(opcuaSouth.scanGroups)
-      .toEqual(opcuaScanGroups)
-    expect(Object.keys(opcuaSouth.lastCompletedAt))
-      .toEqual([opcuaConfig.OPCUA_HA.scanGroups[0].scanMode])
-    expect(Object.keys(opcuaSouth.ongoingReads))
-      .toEqual([opcuaConfig.OPCUA_HA.scanGroups[0].scanMode])
-
-    expect(databaseService.createConfigDatabase)
-      .toBeCalledWith(`${config.engine.caching.cacheFolder}/${opcuaConfig.id}.db`)
-    expect(databaseService.getConfig)
-      .toHaveBeenCalledTimes(2)
-    expect(opcuaSouth.lastCompletedAt.every10Second)
-      .toEqual(new Date('2020-04-23T11:09:01.001Z'))
-    expect(opcuaSouth.connectToOpcuaServer)
-      .toHaveBeenCalledTimes(1)
+    expect(opcuaSouth.scanGroups).toEqual(opcuaScanGroups)
+    expect(Object.keys(opcuaSouth.lastCompletedAt)).toEqual([opcuaConfig.OPCUA_HA.scanGroups[0].scanMode])
+    expect(Object.keys(opcuaSouth.ongoingReads)).toEqual([opcuaConfig.OPCUA_HA.scanGroups[0].scanMode])
+
+    expect(databaseService.createConfigDatabase).toBeCalledWith(`${config.engine.caching.cacheFolder}/${opcuaConfig.id}.db`)
+    expect(databaseService.getConfig).toHaveBeenCalledTimes(2)
+    expect(opcuaSouth.lastCompletedAt.every10Second).toEqual(new Date('2020-04-23T11:09:01.001Z'))
+    expect(opcuaSouth.connectToOpcuaServer).toHaveBeenCalledTimes(1)
   })
 
   it('should properly connect and set lastCompletedAt from config file', async () => {
@@ -130,14 +119,10 @@ describe('OPCUA-HA south', () => {
     opcuaSouth.connectToOpcuaServer = jest.fn()
     await opcuaSouth.connect()
 
-    expect(databaseService.createConfigDatabase)
-      .toBeCalledWith(`${config.engine.caching.cacheFolder}/${opcuaConfig.id}.db`)
-    expect(databaseService.getConfig)
-      .toHaveBeenCalledTimes(2)
-    expect(opcuaSouth.lastCompletedAt.every10Second)
-      .toEqual(new Date(opcuaConfig.startTime))
-    expect(opcuaSouth.connectToOpcuaServer)
-      .toHaveBeenCalledTimes(1)
+    expect(databaseService.createConfigDatabase).toBeCalledWith(`${config.engine.caching.cacheFolder}/${opcuaConfig.id}.db`)
+    expect(databaseService.getConfig).toHaveBeenCalledTimes(2)
+    expect(opcuaSouth.lastCompletedAt.every10Second).toEqual(new Date(opcuaConfig.startTime))
+    expect(opcuaSouth.connectToOpcuaServer).toHaveBeenCalledTimes(1)
   })
 
   it('should properly connect and set lastCompletedAt now', async () => {
@@ -150,15 +135,10 @@ describe('OPCUA-HA south', () => {
     opcuaSouthWithoutStartTime.connectToOpcuaServer = jest.fn()
     await opcuaSouthWithoutStartTime.connect()
 
-    expect(databaseService.createConfigDatabase)
-      .toBeCalledWith(`${config.engine.caching.cacheFolder}/${opcuaConfig.id}.db`)
-    expect(databaseService.getConfig)
-      .toHaveBeenCalledTimes(2)
-    expect(opcuaSouthWithoutStartTime.lastCompletedAt.every10Second)
-      .not
-      .toEqual(new Date(opcuaConfig.originalStartTime).getTime())
-    expect(opcuaSouthWithoutStartTime.connectToOpcuaServer)
-      .toHaveBeenCalledTimes(1)
+    expect(databaseService.createConfigDatabase).toBeCalledWith(`${config.engine.caching.cacheFolder}/${opcuaConfig.id}.db`)
+    expect(databaseService.getConfig).toHaveBeenCalledTimes(2)
+    expect(opcuaSouthWithoutStartTime.lastCompletedAt.every10Second).not.toEqual(new Date(opcuaConfig.originalStartTime).getTime())
+    expect(opcuaSouthWithoutStartTime.connectToOpcuaServer).toHaveBeenCalledTimes(1)
   })
 
   it('should properly connect to OPC UA server without password', async () => {
@@ -174,26 +154,16 @@ describe('OPCUA-HA south', () => {
       securityPolicy: Opcua.SecurityPolicy.None,
       endpointMustExist: false,
       keepSessionAlive: false,
+      keepPendingSessionsOnDisconnect: false,
       clientCertificateManager: { state: 2 },
     }
-    Opcua.OPCUAClient.create.mockReturnValue({
-      connect: jest.fn(),
-      createSession: jest.fn(),
-    })
+    const expectedUserIdentity = { type: 0 }
 
     await opcuaSouth.connect()
 
-    expect(Opcua.OPCUAClient.create)
-      .toBeCalledWith(expectedOptions)
-    expect(opcuaSouth.client.connect)
-      .toBeCalledWith(opcuaConfig.OPCUA_HA.url)
-    expect(opcuaSouth.client.createSession)
-      .toBeCalledTimes(1)
-    expect(opcuaSouth.connected)
-      .toBeTruthy()
-    expect(setTimeoutSpy)
-      .not
-      .toBeCalled()
+    expect(opcuaSouth.connected).toBeTruthy()
+    expect(Opcua.OPCUAClient.createSession).toBeCalledWith(opcuaSouth.url, expectedUserIdentity, expectedOptions)
+    expect(setTimeoutSpy).not.toBeCalled()
   })
 
   it('should properly connect to OPC UA server with password', async () => {
@@ -209,12 +179,9 @@ describe('OPCUA-HA south', () => {
       securityPolicy: Opcua.SecurityPolicy.None,
       endpointMustExist: false,
       keepSessionAlive: false,
+      keepPendingSessionsOnDisconnect: false,
       clientCertificateManager: { state: 2 },
     }
-    Opcua.OPCUAClient.create.mockReturnValue({
-      connect: jest.fn(),
-      createSession: jest.fn(),
-    })
     opcuaSouth.username = 'username'
     opcuaSouth.password = 'password'
 
@@ -227,52 +194,21 @@ describe('OPCUA-HA south', () => {
       userName: 'username',
       password: 'password',
     }
-    expect(Opcua.OPCUAClient.create)
-      .toBeCalledWith(expectedOptions)
-    expect(opcuaSouth.client.connect)
-      .toBeCalledWith(opcuaConfig.OPCUA_HA.url)
-    expect(opcuaSouth.client.createSession)
-      .toBeCalledWith(expectedUserIdentity)
-    expect(opcuaSouth.connected)
-      .toBeTruthy()
-    expect(setTimeoutSpy)
-      .not
-      .toBeCalled()
+    expect(Opcua.OPCUAClient.createSession).toBeCalledWith(opcuaSouth.url, expectedUserIdentity, expectedOptions)
+    expect(opcuaSouth.connected).toBeTruthy()
+    expect(setTimeoutSpy).not.toBeCalled()
   })
 
   it('should properly retry connection to OPC UA server', async () => {
     const setTimeoutSpy = jest.spyOn(global, 'setTimeout')
-    const expectedOptions = {
-      applicationName: 'OIBus',
-      clientName: 'myConnectorId',
-      connectionStrategy: {
-        initialDelay: 1000,
-        maxRetry: 1,
-      },
-      securityMode: Opcua.MessageSecurityMode.None,
-      securityPolicy: Opcua.SecurityPolicy.None,
-      endpointMustExist: false,
-      keepSessionAlive: false,
-      clientCertificateManager: { state: 2 },
-    }
-    Opcua.OPCUAClient.create.mockReturnValue({
-      connect: jest.fn(() => Promise.reject()),
-      createSession: jest.fn(),
-    })
+    Opcua.OPCUAClient.createSession.mockReturnValue(new Promise((resolve, reject) => {
+      reject(new Error('test'))
+    }))
 
     await opcuaSouth.connect()
 
-    expect(Opcua.OPCUAClient.create)
-      .toBeCalledWith(expectedOptions)
-    expect(opcuaSouth.client.connect)
-      .toBeCalledWith(opcuaConfig.OPCUA_HA.url)
-    expect(opcuaSouth.client.createSession)
-      .not
-      .toBeCalled()
-    expect(opcuaSouth.connected)
-      .toBeFalsy()
-    expect(setTimeoutSpy)
-      .toHaveBeenLastCalledWith(expect.any(Function), opcuaConfig.OPCUA_HA.retryInterval)
+    expect(opcuaSouth.connected).toBeFalsy()
+    expect(setTimeoutSpy).toHaveBeenLastCalledWith(expect.any(Function), opcuaConfig.OPCUA_HA.retryInterval)
   })
 
   it('should quit onScan if not connected', async () => {
@@ -283,9 +219,7 @@ describe('OPCUA-HA south', () => {
     opcuaSouth.session = { readHistoryValue: jest.fn() }
     await opcuaSouth.historyQueryHandler(opcuaConfig.OPCUA_HA.scanGroups[0].scanMode)
 
-    expect(opcuaSouth.session.readHistoryValue)
-      .not
-      .toBeCalled()
+    expect(opcuaSouth.session.readHistoryValue).not.toBeCalled()
   })
 
   it('should quit onScan if previous read did not complete', async () => {
@@ -297,9 +231,7 @@ describe('OPCUA-HA south', () => {
     opcuaSouth.session = { readHistoryValue: jest.fn() }
     await opcuaSouth.historyQueryHandler(opcuaConfig.OPCUA_HA.scanGroups[0].scanMode)
 
-    expect(opcuaSouth.session.readHistoryValue)
-      .not
-      .toBeCalled()
+    expect(opcuaSouth.session.readHistoryValue).not.toBeCalled()
   })
 
   it('should quit onScan if scan group has no points to read', async () => {
@@ -319,9 +251,7 @@ describe('OPCUA-HA south', () => {
     opcuaSouthWithoutPointsScanMode.session = { readHistoryValue: jest.fn() }
     await opcuaSouthWithoutPointsScanMode.historyQueryHandler(opcuaConfig.OPCUA_HA.scanGroups[0].scanMode)
 
-    expect(opcuaSouthWithoutPointsScanMode.session.readHistoryValue)
-      .not
-      .toBeCalled()
+    expect(opcuaSouthWithoutPointsScanMode.session.readHistoryValue).not.toBeCalled()
   })
 
   it('should in onScan call readHistoryValue once if maxReadInterval is bigger than the read interval', async () => {
@@ -367,22 +297,16 @@ describe('OPCUA-HA south', () => {
         quality: '{"value":0}',
       },
     }
-    expect(opcuaSouth.readHistoryValue)
-      .toBeCalledTimes(1)
-    expect(opcuaSouth.readHistoryValue)
-      .toBeCalledWith([opcuaConfig.points[0]], startDate, nowDate, { numValuesPerNode: 1000, timeout: 600000 })
-    expect(opcuaSouth.addValues)
-      .toBeCalledTimes(1)
-    expect(opcuaSouth.addValues)
-      .toBeCalledWith([expectedValue])
-    expect(databaseService.upsertConfig)
-      .toBeCalledWith(
-        'configDatabase',
-        `lastCompletedAt-${opcuaConfig.OPCUA_HA.scanGroups[0].scanMode}`,
-        new Date(sampleDate.getTime() + 1).toISOString(),
-      )
-    expect(opcuaSouth.ongoingReads[opcuaConfig.OPCUA_HA.scanGroups[0].scanMode])
-      .toBeFalsy()
+    expect(opcuaSouth.readHistoryValue).toBeCalledTimes(1)
+    expect(opcuaSouth.readHistoryValue).toBeCalledWith([opcuaConfig.points[0]], startDate, nowDate, { numValuesPerNode: 1000, timeout: 600000 })
+    expect(opcuaSouth.addValues).toBeCalledTimes(1)
+    expect(opcuaSouth.addValues).toBeCalledWith([expectedValue])
+    expect(databaseService.upsertConfig).toBeCalledWith(
+      'configDatabase',
+      `lastCompletedAt-${opcuaConfig.OPCUA_HA.scanGroups[0].scanMode}`,
+      new Date(sampleDate.getTime() + 1).toISOString(),
+    )
+    expect(opcuaSouth.ongoingReads[opcuaConfig.OPCUA_HA.scanGroups[0].scanMode]).toBeFalsy()
     expect(opcuaSouth.delay).not.toBeCalled()
   })
 
@@ -404,8 +328,7 @@ describe('OPCUA-HA south', () => {
 
     await opcuaSouth.historyQueryHandler(opcuaConfig.OPCUA_HA.scanGroups[0].scanMode)
 
-    expect(opcuaSouth.readHistoryValue)
-      .toBeCalledTimes(3)
+    expect(opcuaSouth.readHistoryValue).toBeCalledTimes(3)
     expect(opcuaSouth.delay).toBeCalledTimes(2)
     expect(opcuaSouth.delay.mock.calls).toEqual([[200], [200]])
   })
@@ -424,18 +347,11 @@ describe('OPCUA-HA south', () => {
 
     await opcuaSouth.historyQueryHandler(opcuaConfig.OPCUA_HA.scanGroups[0].scanMode)
 
-    expect(opcuaSouth.readHistoryValue)
-      .toBeCalledTimes(1)
-    expect(opcuaSouth.logger.error)
-      .toHaveBeenCalledWith('Received 0 data values, requested 1 nodes')
+    expect(opcuaSouth.readHistoryValue).toBeCalledTimes(1)
+    expect(opcuaSouth.logger.error).toHaveBeenCalledWith('Received 0 data values, requested 1 nodes')
   })
 
   it('should onScan catch errors', async () => {
-    Opcua.OPCUAClient.create.mockReturnValue({
-      connect: jest.fn(),
-      createSession: jest.fn(),
-      disconnect: jest.fn(),
-    })
     await opcuaSouth.connect()
     opcuaSouth.connected = true
     opcuaSouth.ongoingReads[opcuaConfig.OPCUA_HA.scanGroups[0].scanMode] = false
@@ -444,56 +360,35 @@ describe('OPCUA-HA south', () => {
     opcuaSouth.session = { close: jest.fn() }
     await opcuaSouth.historyQueryHandler(opcuaConfig.OPCUA_HA.scanGroups[0].scanMode)
 
-    expect(opcuaSouth.readHistoryValue)
-      .toBeCalled()
-    expect(opcuaSouth.logger.error)
-      .toHaveBeenCalled()
+    expect(opcuaSouth.readHistoryValue).toBeCalled()
+    expect(opcuaSouth.logger.error).toHaveBeenCalled()
   })
 
   it('should properly disconnect when trying to connect', async () => {
     const clearTimeoutSpy = jest.spyOn(global, 'clearTimeout')
-    Opcua.OPCUAClient.create.mockReturnValue({
-      connect: jest.fn(),
-      createSession: jest.fn(),
-      disconnect: jest.fn(),
-    })
 
     await opcuaSouth.connect()
     opcuaSouth.reconnectTimeout = true
     opcuaSouth.connected = false
-    opcuaSouth.session = { close: jest.fn() }
+    const close = jest.fn()
+    opcuaSouth.session = { close }
     await opcuaSouth.disconnect()
 
-    expect(clearTimeoutSpy)
-      .toBeCalled()
-    expect(opcuaSouth.session.close)
-      .not
-      .toBeCalled()
-    expect(opcuaSouth.client.disconnect)
-      .not
-      .toBeCalled()
+    expect(clearTimeoutSpy).toBeCalled()
+    expect(close).not.toBeCalled()
   })
 
   it('should properly disconnect when connected', async () => {
     const clearTimeoutSpy = jest.spyOn(global, 'clearTimeout')
-    Opcua.OPCUAClient.create.mockReturnValue({
-      connect: jest.fn(),
-      createSession: jest.fn(),
-      disconnect: jest.fn(),
-    })
 
     await opcuaSouth.connect()
     opcuaSouth.reconnectTimeout = false
     opcuaSouth.connected = true
-    opcuaSouth.session = { close: jest.fn() }
+    const close = jest.fn()
+    opcuaSouth.session = { close }
     await opcuaSouth.disconnect()
 
-    expect(clearTimeoutSpy)
-      .not
-      .toBeCalled()
-    expect(opcuaSouth.session.close)
-      .toBeCalled()
-    expect(opcuaSouth.client.disconnect)
-      .toBeCalled()
+    expect(clearTimeoutSpy).not.toBeCalled()
+    expect(close).toBeCalled()
   })
 })
diff --git a/tests/csv/archived/fichier.csv b/tests/csv/archived/fichier.csv
deleted file mode 100644
index 2fa04741a0..0000000000
--- a/tests/csv/archived/fichier.csv
+++ /dev/null
@@ -1,3 +0,0 @@
-timeStamp,sensor1-value,sensor1-quality,sensor3,sensor4
-"01/10/18 11:01	","34.6530599","90.7057566","10.1564125","32.5156548"
-"01/10/18 11:15	","7.44583695","75.7873194","81.9485416","99.9999999"
\ No newline at end of file