diff --git a/CHANGELOG.md b/CHANGELOG.md
index c8eec63..fed734d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.1.0] - 2022-10-29
+- Adapt Wifi country settings to ESP IDF v4.4 Wi-Fi API
+- Keep backward compatibility to 1.0.1
+
 ## [1.0.1] - 2022-04-14
 - Count randomized MACs only (Wifi and BLE)
 - fix use LSB format to interprete BLE MACS
diff --git a/lib/libpax/blescan.cpp b/lib/libpax/blescan.cpp
index 81cdffb..42a1d4d 100644
--- a/lib/libpax/blescan.cpp
+++ b/lib/libpax/blescan.cpp
@@ -12,8 +12,10 @@
 #define BLESCANINTERVAL 80  // [illiseconds]
 #endif
 
-// local Tag for logging
-static const char TAG[] = "bluetooth";
+#ifndef TAG
+#define TAG __FILE__
+#endif
+
 int initialized_ble = 0;
 int ble_rssi_threshold = 0;
 
@@ -282,7 +284,6 @@ void stop_BLE_scan(void) {
     ESP_ERROR_CHECK(esp_bt_controller_disable());
     ESP_ERROR_CHECK(esp_bt_controller_deinit());
 #endif
-    ESP_ERROR_CHECK(esp_coex_preference_set(ESP_COEX_PREFER_WIFI));
     ESP_LOGI(TAG, "Bluetooth scanner stopped");
     initialized_ble = 0;
   }
diff --git a/lib/libpax/libpax.h b/lib/libpax/libpax.h
index ce68fd6..8ef4b79 100644
--- a/lib/libpax/libpax.h
+++ b/lib/libpax/libpax.h
@@ -6,7 +6,7 @@
 #include "wifiscan.h"
 
 #define CONFIG_MAJOR_VERSION 1
-#define CONFIG_MINOR_VERSION 0
+#define CONFIG_MINOR_VERSION 1
 
 /*
  Memory payload structure for persiting configurations
@@ -18,9 +18,9 @@ struct libpax_config_storage_t {
     uint8_t reserved_start[2];
     struct libpax_config_t config;
     // Added for structure alignment
-    uint8_t pad;
-     // reserved for future use
-    uint8_t reserved_end[25];             
+    uint8_t pad[2];
+    // reserved for future use
+    uint8_t reserved_end[21];             
     uint8_t checksum[4]; 
 };
 
diff --git a/lib/libpax/libpax_api.cpp b/lib/libpax/libpax_api.cpp
index 3e8c318..8c96683 100644
--- a/lib/libpax/libpax_api.cpp
+++ b/lib/libpax/libpax_api.cpp
@@ -95,7 +95,7 @@ void libpax_default_config(struct libpax_config_t* configuration) {
   memset(configuration, 0, sizeof(struct libpax_config_t));
   configuration->blecounter = 0;
   configuration->wificounter = 1;
-  configuration->wifi_my_country = 1;
+  strcpy(configuration->wifi_my_country_str, "01");
   configuration->wifi_channel_map = 0b100010100100100;
   configuration->wifi_channel_switch_interval = 50;
   configuration->wifi_rssi_threshold = 0;
@@ -130,6 +130,10 @@ int libpax_update_config(struct libpax_config_t* configuration) {
 
   if (result == 0) {
     memcpy(&current_config, configuration, sizeof(struct libpax_config_t));
+    // this if to keep v1.0.1 backward compatibility
+    if (strcmp(current_config.wifi_my_country_str, "")) {
+      strcpy(current_config.wifi_my_country_str, current_config.wifi_my_country ? "DE" : "01");
+    }
     config_set = 1;
   }
   return result;
@@ -172,26 +176,26 @@ int libpax_counter_start() {
     ESP_LOGE("configuration", "Configuration was not yet set.");
     return -1;
   }
-  if (current_config.wificounter) {
-    set_wifi_country(current_config.wifi_my_country);
-    set_wifi_channels(current_config.wifi_channel_map);
-    set_wifi_rssi_filter(current_config.wifi_rssi_threshold);
-    wifi_sniffer_init(current_config.wifi_channel_switch_interval);
-  }
-  if (current_config.wificounter && current_config.blecounter) {
-    esp_wifi_set_ps(WIFI_PS_MIN_MODEM);
-  } else {
-    esp_wifi_set_ps(WIFI_PS_NONE);
-  }
-  if (current_config.blecounter) {
+  // turn on BT before Wifi, since the ESP32 API coexistence configuration option depends 
+  // on the Bluetooth configuration option
+    if (current_config.blecounter) {
     set_BLE_rssi_filter(current_config.ble_rssi_threshold);
     start_BLE_scan(current_config.blescantime, current_config.blescanwindow,
                    current_config.blescaninterval);
   }
+  if (current_config.wificounter) {
+    wifi_sniffer_init(current_config.wifi_channel_switch_interval);
+    set_wifi_country(current_config.wifi_my_country_str);
+    set_wifi_channels(current_config.wifi_channel_map);
+    set_wifi_rssi_filter(current_config.wifi_rssi_threshold);
+  }
   return 0;
 }
 
 int libpax_counter_stop() {
+  if (PaxReportTimer == NULL) {
+    return -1;
+  }
   wifi_sniffer_stop();
   stop_BLE_scan();
   xTimerStop(PaxReportTimer, 0);
diff --git a/lib/libpax/libpax_api.h b/lib/libpax/libpax_api.h
index 5d72e4c..a19e8f2 100644
--- a/lib/libpax/libpax_api.h
+++ b/lib/libpax/libpax_api.h
@@ -39,6 +39,7 @@ struct libpax_config_t {
     uint32_t blescantime;                   // [seconds] scan duration, 0 means infinite [default]
     uint16_t blescanwindow;                 // [milliseconds] scan window, see below, 3 ... 10240, default 80ms
     uint16_t blescaninterval;               // [illiseconds] scan interval, see below, 3 ... 10240, default 80ms = 100% duty cycle
+    char wifi_my_country_str[3];            // set country code for WiFi RF settings, e.g. "01", "DE", etc.
 };
 
 
diff --git a/lib/libpax/wifiscan.cpp b/lib/libpax/wifiscan.cpp
index 61d8e01..ae6491b 100644
--- a/lib/libpax/wifiscan.cpp
+++ b/lib/libpax/wifiscan.cpp
@@ -32,49 +32,50 @@ Which in turn is based of Łukasz Marcin Podkalicki's ESP32/016 WiFi Sniffer
 #include "globals.h"
 
 #include <string.h>
-#include "wifiscan.h"
 #include "libpax.h"
+#include "wifiscan.h"
 
 TimerHandle_t WifiChanTimer;
 int initialized_wifi = 0;
 int wifi_rssi_threshold = 0;
 uint16_t channels_map = WIFI_CHANNEL_ALL;
-
-#define WIFI_CHANNEL_MAX 13
-// default values for country configuration
-static wifi_country_t wifi_country = {"EU", 1,
-                                      WIFI_CHANNEL_MAX, 100,
-                                      WIFI_COUNTRY_POLICY_MANUAL};
+static wifi_country_t country;
 
 void wifi_noop_sniffer(void* buff, wifi_promiscuous_pkt_type_t type) {}
 
 // using IRAM_ATTR here to speed up callback function
-static IRAM_ATTR void
-wifi_sniffer_packet_handler(void* buff, wifi_promiscuous_pkt_type_t type) {
+static IRAM_ATTR void wifi_sniffer_packet_handler(
+    void* buff, wifi_promiscuous_pkt_type_t type) {
   const wifi_promiscuous_pkt_t* ppkt = (wifi_promiscuous_pkt_t*)buff;
   const wifi_ieee80211_packet_t* ipkt = (wifi_ieee80211_packet_t*)ppkt->payload;
   const wifi_ieee80211_mac_hdr_t* hdr = &ipkt->hdr;
 
   if ((wifi_rssi_threshold) &&
       (ppkt->rx_ctrl.rssi < wifi_rssi_threshold))  // rssi is negative value
-     return;
-  else 
-     mac_add((uint8_t *)hdr->addr2, MAC_SNIFF_WIFI);
+    return;
+  else
+    mac_add((uint8_t*)hdr->addr2, MAC_SNIFF_WIFI);
 }
 
 // Software-timer driven Wifi channel rotation callback function
 void switchWifiChannel(TimerHandle_t xTimer) {
   configASSERT(xTimer);
-  do { channel =
-      (channel % WIFI_CHANNEL_MAX) + 1;  // rotate channels in bitmap
+  do {
+    channel = (channel % country.nchan) + 1;  // rotate channels in bitmap
   } while (!(channels_map >> (channel - 1) & 1));
   esp_wifi_set_channel(channel, WIFI_SECOND_CHAN_NONE);
 }
 
+void set_wifi_country(const char* country_code) {
+  ESP_ERROR_CHECK(esp_wifi_set_country_code(country_code, true));
+  ESP_ERROR_CHECK(esp_wifi_get_country(&country));
+}
+
+// Keep this a while for compatibility with 1.0.1
 void set_wifi_country(uint8_t cc) {
-  switch(cc) {
-      case 1:
-        memcpy(wifi_country.cc, "EU", sizeof("EU"));
+  switch (cc) {
+    case 1:
+      set_wifi_country("DE");
       break;
   }
 }
@@ -88,56 +89,45 @@ void set_wifi_rssi_filter(int set_rssi_threshold) {
 }
 
 void wifi_sniffer_init(uint16_t wifi_channel_switch_interval) {
-  #ifdef LIBPAX_WIFI
+#ifdef LIBPAX_WIFI
   wifi_init_config_t wificfg = WIFI_INIT_CONFIG_DEFAULT();
   wificfg.nvs_enable = 0;         // we don't need any wifi settings from NVRAM
   wificfg.wifi_task_core_id = 0;  // we want wifi task running on core 0
 
-  // wifi_promiscuous_filter_t filter = {
-  //    .filter_mask = WIFI_PROMIS_FILTER_MASK_MGMT}; // only MGMT frames
-  // .filter_mask = WIFI_PROMIS_FILTER_MASK_ALL}; // we use all frames
-
+  // filter management and data frames to the sniffer
   wifi_promiscuous_filter_t filter = {.filter_mask =
                                           WIFI_PROMIS_FILTER_MASK_MGMT |
                                           WIFI_PROMIS_FILTER_MASK_DATA};
 
   ESP_ERROR_CHECK(esp_wifi_init(&wificfg));  // configure Wifi with cfg
   ESP_ERROR_CHECK(
-      esp_wifi_set_country(&wifi_country));  // set locales for RF and channels
-  ESP_ERROR_CHECK(
-      esp_wifi_set_storage(WIFI_STORAGE_RAM));  // we don't need NVRAM
-  ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_NULL));
-  ESP_ERROR_CHECK(
-      esp_wifi_set_promiscuous_filter(&filter));  // set frame filter
+      esp_wifi_set_promiscuous_filter(&filter));  // enable frame filtering
   ESP_ERROR_CHECK(esp_wifi_set_promiscuous_rx_cb(&wifi_sniffer_packet_handler));
-  ESP_ERROR_CHECK(esp_wifi_start());  // for esp_wifi v3.3
   ESP_ERROR_CHECK(
-      esp_wifi_set_promiscuous(true));  // now switch on monitor mode
+      esp_wifi_set_promiscuous(true));  // start sniffer mode
 
   // setup wifi channel rotation timer
-  if(wifi_channel_switch_interval > 0) {
-    WifiChanTimer = xTimerCreate("WifiChannelTimer", pdMS_TO_TICKS(wifi_channel_switch_interval * 10),
-                                pdTRUE, (void*)0, switchWifiChannel);
+  if (wifi_channel_switch_interval > 0) {
+    WifiChanTimer = xTimerCreate(
+        "WifiChannelTimer", pdMS_TO_TICKS(wifi_channel_switch_interval * 10),
+        pdTRUE, (void*)0, switchWifiChannel);
     assert(WifiChanTimer);
     xTimerStart(WifiChanTimer, 0);
   }
-  ESP_ERROR_CHECK(esp_wifi_start());
-  esp_wifi_set_promiscuous(true);
+
   initialized_wifi = 1;
-  #endif
+#endif
 }
 
 void wifi_sniffer_stop() {
-  #ifdef LIBPAX_WIFI
-  if(initialized_wifi) {
-    if(WifiChanTimer) xTimerStop(WifiChanTimer, 0);
+#ifdef LIBPAX_WIFI
+  if (initialized_wifi) {
+    if (WifiChanTimer) xTimerStop(WifiChanTimer, 0);
     ESP_ERROR_CHECK(esp_wifi_set_promiscuous_rx_cb(&wifi_noop_sniffer));
     ESP_ERROR_CHECK(
         esp_wifi_set_promiscuous(false));  // now switch off monitor mode
-    ESP_ERROR_CHECK(esp_wifi_stop());
     esp_wifi_deinit();
-    ESP_ERROR_CHECK(esp_coex_preference_set(ESP_COEX_PREFER_BT));
     initialized_wifi = 0;
   }
-  #endif
+#endif
 }
diff --git a/lib/libpax/wifiscan.h b/lib/libpax/wifiscan.h
index 8239109..285acdc 100644
--- a/lib/libpax/wifiscan.h
+++ b/lib/libpax/wifiscan.h
@@ -18,7 +18,8 @@ typedef struct {
   uint8_t payload[0];  // network data ended with 4 bytes csum (CRC32)
 } wifi_ieee80211_packet_t;
 
-void set_wifi_country(uint8_t country_code);
+void set_wifi_country(const char* country_code);
+void set_wifi_country(uint8_t cc);
 void set_wifi_channels(uint16_t channels_map);
 void set_wifi_rssi_filter(int set_rssi_threshold);
 
diff --git a/library.json b/library.json
index 1681ebf..bb919a2 100644
--- a/library.json
+++ b/library.json
@@ -1,6 +1,6 @@
 {
     "name": "libpax",
-    "version":"1.0.1",
+    "version":"1.1.0",
     "keywords": "libpax",
     "description": "Library for PAX counting using BLE and WiFi",
     "repository":
diff --git a/platformio.ini b/platformio.ini
index 6d50a7a..73461ec 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -5,7 +5,7 @@ default_envs = espidf
 [env]
 board = ttgo-t-beam
 monitor_speed = 115200
-platform = espressif32@3.5.0
+platform = espressif32@5.2.0
 
 [env:espidf]
 framework = espidf
diff --git a/test/libpax_test_cases.cpp b/test/libpax_test_cases.cpp
index fcbe663..547a967 100644
--- a/test/libpax_test_cases.cpp
+++ b/test/libpax_test_cases.cpp
@@ -122,7 +122,7 @@ void test_callback() {
   TEST_ASSERT_EQUAL(0, err_code);
   printf("libpax should be running\n");
 
-  vTaskDelayUntil(&xLastWakeTime, pdMS_TO_TICKS(6000));
+  vTaskDelayUntil(&xLastWakeTime, pdMS_TO_TICKS(6010));
   TEST_ASSERT_EQUAL(6, time_called_back);
 }