Improvements to Paho MQTT (GIT8266O-492) #312
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The existing NetworkConnect API calls gethostbyname() to resolve the hostname of the MQTT broker to ip address. In our setup, we are using Avahi daemon (running on raspberrypi) for name resolution and apparently ESP8266 FreeRTOS port cannot handle mDNS based name resolution. Hence, gethostbyname() fails to resolve the hostname of the MQTT broker. To support connecting to MQTT broker by specifying it's ip address directly, I am adding a new API NetworkConnectIP that takes ip address instead of hostname to setup mqtt network connection. Signed-off-by: Yasir Khan <yasir_electronics@yahoo.com>
Current implementation doesn't consider the disconnection of ESP8266 (in station mode) from the AP and consequently MQTT broker. Since in our indoor farming scenerio, wifi disconnections are expected, there should be a way to handle mqtt broker disconnection. This is implemented in following ways: * Add NetworkDisconnect() API to close the socket to mqtt broker * Stop the MQTT keep alive background thread Signed-off-by: Yasir Khan <yasir_electronics@yahoo.com>
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