//send a data value to the cloud server for the sensor with the specified id.
void ATTDevice::Send(String value, int id)
{
if(_mqttclient->connected() == false)
{
#ifdef DEBUG
Serial.println(F("Lost broker connection,restarting from send"));
#endif
MqttConnect();
}
char* message_buff = BuildContent(value);
#ifdef DEBUG //don't need to write all of this if not debugging.
Serial.print(F("Publish to ")); Serial.print(id); Serial.print(": "); Serial.println(message_buff);
#endif
char* Mqttstring_buff;
{
String idStr(id); //turn it into a string, so we can easily calculate the nr of characters that the nr requires.
int length = _clientId.length() + _deviceId.length() + 33 + idStr.length();
Mqttstring_buff = new char[length];
sprintf(Mqttstring_buff, "client/%s/out/device/%s/asset/%s/state", _clientId.c_str(), _deviceId.c_str(), idStr.c_str());
Mqttstring_buff[length-1] = 0;
}
_mqttclient->publish(Mqttstring_buff, message_buff);
#ifndef FAST_MQTT //some boards like the old arduino ethernet need a little time after sending mqtt data, other boards don't.
delay(100); //give some time to the ethernet shield so it can process everything.
#endif
delete(message_buff);
delete(Mqttstring_buff);
}
//send a data value to the cloud server for the sensor with the specified id.
void ATTDevice::Send(String value, int id)
{
if(_mqttclient->connected() == false)
{
Serial.println(F("Lost broker connection,restarting"));
MqttConnect();
}
char* message_buff = BuildContent(value);
#ifdef DEBUG //don't need to write all of this if not debugging.
Serial.print(F("Publish to ")); Serial.print(id); Serial.print(" : ");
#endif
Serial.println(message_buff); //this value is still useful and generated anyway, so no extra cost.
char* Mqttstring_buff;
{
int length = _clientId.length() + _deviceId.length() + 26;
Mqttstring_buff = new char[length];
sprintf(Mqttstring_buff, "client/%s/out/asset/%s%c/state", _clientId.c_str(), _deviceId.c_str(), (char)(id + 48));
Mqttstring_buff[length-1] = 0;
}
_mqttclient->publish(Mqttstring_buff, message_buff);
delay(100); //give some time to the ethernet shield so it can process everything.
delete(message_buff);
delete(Mqttstring_buff);
}
/*Stop http processing & make certain that we can receive data from the mqtt server, given the specified username and pwd.
This Subscribe function can be used to connect to a fog gateway
returns true when successful, false otherwise*/
bool ATTDevice::Subscribe(PubSubClient& mqttclient, const char* username, const char* pwd)
{
_mqttclient = &mqttclient;
_serverName = ""; //no longer need this reference.
CloseHTTP();
_mqttUserName = username;
_mqttpwd = pwd;
return MqttConnect();
}
//connect with the http server and broker
void ATTDevice::Subscribe(PubSubClient& mqttclient)
{
_mqttclient = &mqttclient;
_serverName = NULL; //no longer need this reference.
#ifdef DEBUG
Serial.println(F("Stopping HTTP"));
#endif
_client->flush();
_client->stop();
_client = NULL;
MqttConnect();
}
//check for any new mqtt messages.
bool ATTDevice::Process()
{
if(_mqttclient->connected() == false)
{
#ifdef DEBUG
Serial.println(F("Lost broker connection,restarting from process"));
#endif
if(MqttConnect() == false)
return false;
}
_mqttclient->loop();
return true;
}