Description
Hi all,
I'm having trouble keeping a nano33iot running when the internet connection (but not wifi) fails/drops for a short period of time.
It gets stuck in the function void ArduinoIoTCloudClass::update(CallbackFunc onSyncCompleteCallback) called from the loop() code.
After the connection fails, the board will have 45/60 seconds of life before getting completely stuck inside that function. No trying to reconnect occurs.
Even if the internet connection fails for only a couple of seconds, the board will freeze in 45/60 seconds.
The only solution is to reset either the board or the access point (the latter will trigger a wifi drop and the board will come back to life again searching for the wifi network).
Tested repeatedly in the last few days in many ways:
- unplugging the ethernet cable on a wifi accesspoint
- disabling the mobile network on android in hotspot mode
- casually walking away from the AP with the board in hands (this sometimes will trigger the wifi drop+reconnection)
- different accesspoint/networks
- on a mkrwifi1010
With some Serial.print-fu I was able to narrow it a little bit to the call _mqttClient->poll() inside the update() function.
Tested sketch is fresh template generated by the Arduino Create IoT Cloud compiled with the latest release of ArduinoIoTCloud (and dependencies).