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NetworkManager.cpp
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NetworkManager.cpp
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#include "NetworkManager.h"
NetworkManager::NetworkManager():
radio(33, 27), // RADIO CE-PINS
network(radio),
mesh(radio, network),
client(server.c_str(), port, NULL, wifiClient),
timeClient(ntpUDP, "europe.pool.ntp.org", 3600, 60000)
{
lastReconnectAttempt = 0;
count = 0;
status = WL_IDLE_STATUS;
}
void NetworkManager::init() {
Serial.println(F("Master Node - Gateway"));
mesh.setNodeID(0);
Serial.print(F("NodeID: "));
Serial.println(mesh.getNodeID());
mesh.begin();
connectWiFi();
timeClient.begin();
timeClient.update();
setConnectionString(connectionString);
connectCloud();
}
void NetworkManager::updateTime() {
timeClient.update();
}
// ---- - MESH
void NetworkManager::updateMesh() {
mesh.update();
}
void NetworkManager::updateDHCP() {
mesh.DHCP();
}
void NetworkManager::printInfo() {
Serial.println(F(" "));
Serial.println(F("********WIFI INFO***********"));
Serial.print(F("SSID: "));
Serial.print(ssid);
Serial.print(F(" ** IP: "));
Serial.print(WiFi.localIP());
Serial.println(" ** Time:" + timeClient.getFormattedTime());
Serial.print(F("-----------------------------"));
Serial.println(F(" "));
Serial.println(F("********Mesh Network********"));
Serial.println(" ");
Serial.println(F("********Assigned Addresses********"));
for (int i = 0; i < mesh.addrListTop; i++) {
Serial.print("NodeID: ");
Serial.print(mesh.addrList[i].nodeID);
Serial.print(" RF24Network Address: 0");
Serial.println(mesh.addrList[i].address, OCT);
}
Serial.println(F("**********************************"));
}
void NetworkManager::sendPayloadToCloud() {
RF24NetworkHeader header;
network.peek(header);
String quote = "\"";
switch (header.type) {
case 'M':
jsonString = "";
network.read(header, &incommingDataArray, sizeof(incommingDataArray));
nodeID = mesh.getNodeID(header.from_node);
temp = incommingDataArray[0];
hum = incommingDataArray[1];
voc = incommingDataArray[2];
c02 = incommingDataArray[3];
motion = incommingDataArray[4];
sound = incommingDataArray[5];
error = incommingDataArray[6];
count = count + 1;
delay(500);
jsonString =
"{\"ID\":" + quote + nodeID + quote + "," +
"\"t\":" + temp + "," +
"\"h\":" + hum + "," +
"\"v\":" + voc + "," +
"\"c\":" + c02 + "," +
"\"m\":" + motion + "," +
"\"time\":" + timeClient.getEpochTime() + "," +
"\"s\":" + sound + "}";
delay(500);
Serial.println(jsonString);
if (client.publish(pubEndpoint.c_str(), jsonString.c_str())) {
wifiClient.flush();
Serial.println("Publish ok");
} else {
Serial.println("Publish failed");
Serial.println(errorCodes(client.state()));
if (client.state() < 0 || client.state() > 0) {
wifiClient.flush();
wifiClient.stop();
yield();
connectWiFi();
connectCloud();
}
}
break;
default:
network.read(header, 0, 0);
Serial.println(header.type);
break;
}
}
// ------ WIFI
void NetworkManager::connectWiFi() {
while (WiFi.status() != WL_CONNECTED) {
delay(10);
Serial.print("Attempting to connect to WPA SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network:
status = WiFi.begin(ssid.c_str(), pass.c_str());
// wait 10 seconds for connection:
delay(10000);
Serial.println("");
if (WiFi.localIP() != 0) {
Serial.println(F("WiFi connected"));
Serial.println(F("IP address: "));
Serial.println(WiFi.localIP());
Serial.println();
} else {
Serial.println(F("Connection to WiFi failed...Reconnecting"));
}
delay(500);
}
}
/// --- CLOUD FUNCTIONS ------------
void NetworkManager::connectCloud() {
Serial.println(F("Connecting to Cloud"));
Serial.println();
client.setServer(server.c_str(), port);
while (!client.connected()) {
//Serial.println("Fastnat på clientconnect");
// CREATE A NEW SAS TimeNow + 24 hours
newSas = createSas(key, url);
if (client.connect(clientId.c_str(), hub_user.c_str(), newSas.c_str())) { // Here is where the connection to the cloud starts
Serial.println(F("Client Connected To Cloud"));
client.subscribe(subEndpoint.c_str());
yield();
} else {
Serial.println();
Serial.println(F("Client Failed To Connect To Cloud"));
Serial.print(F("Error Code: "));
Serial.println(errorCodes(client.state()));
Serial.println("Reconnecting....");
delay(500);
}
}
}
String NetworkManager::errorCodes(int errorCode) {
switch (errorCode) {
case -4: return "The server didn't respond within the keepalive time.";
case -3: return "The network connection was broken.";
case -2: return "The network connection failed.";
case -1: return "The client disconnected cleanly.";
case 0: return "The client connected.";
case 1: return "The server doesn't support the requested version of MQTT.";
case 2: return "The server rejected the client identifier.";
case 3: return "The server was unable to accept the connection.";
case 4: return "The username/password were rejected.";
case 5: return "The client was not authorized to connect.";
default: break;
}
}
String NetworkManager::createSas(char* key, String url) {
sasExpiryTime = timeClient.getEpochTime() + sasExpiryPeriodInSeconds;
String stringToSign = url + "\n" + sasExpiryTime;
int keyLength = strlen(key);
int decodedKeyLength = base64_dec_len(key, keyLength);
char decodedKey[decodedKeyLength]; //allocate char array big enough for the base64 decoded key
base64_decode(decodedKey, key, keyLength); //decode key
Sha256.initHmac((const uint8_t*)decodedKey, decodedKeyLength);
Sha256.print(stringToSign);
char* sign = (char*) Sha256.resultHmac();
// END: Create signature
// START: Get base64 of signature
int encodedSignLen = base64_enc_len(HASH_LENGTH);
char encodedSign[encodedSignLen];
base64_encode(encodedSign, sign, HASH_LENGTH);
// SharedAccessSignature
return "SharedAccessSignature sr=" + url + "&sig=" + urlEncode(encodedSign) + "&se=" + sasExpiryTime;
// END: create SAS
}
String NetworkManager::urlEncode(const char* msg)
{
const char *hex = "0123456789abcdef";
String encodedMsg = "";
while (*msg != '\0') {
if ( ('a' <= *msg && *msg <= 'z')
|| ('A' <= *msg && *msg <= 'Z')
|| ('0' <= *msg && *msg <= '9') ) {
encodedMsg += *msg;
} else {
encodedMsg += '%';
encodedMsg += hex[*msg >> 4];
encodedMsg += hex[*msg & 15];
}
msg++;
}
return encodedMsg;
}
const char* NetworkManager::GetStringValue(String value) {
int len = value.length() + 1;
char *temp = new char[len];
value.toCharArray(temp, len);
return temp;
}
void NetworkManager::setConnectionString(String cs) {
host = GetStringValue(splitStringByIndex(splitStringByIndex(cs, ';', 0), '=', 1));
deviceId = GetStringValue(splitStringByIndex(splitStringByIndex(cs, ';', 1), '=', 1));
key = (char*)GetStringValue(splitStringByIndex(splitStringByIndex(cs, ';', 2), '=', 1));
}
String NetworkManager::splitStringByIndex(String data, char separator, int index)
{
int found = 0;
int strIndex[] = { 0, -1 };
int maxIndex = data.length() - 1;
for (int i = 0; i <= maxIndex && found <= index; i++) {
if (data.charAt(i) == separator || i == maxIndex) {
found++;
strIndex[0] = strIndex[1] + 1;
strIndex[1] = (i == maxIndex) ? i + 1 : i;
}
}
return found > index ? data.substring(strIndex[0], strIndex[1]) : "";
}