I downloaded the sample code following the instruction of ESP32/ESP8266 IoT Cloud (IoT Cloud - Arduino Forum) to a Heltec WiFi Kit 32 board. The sketch is compiled and loaded successfully via Arduino IDE 2.3.2. The board is connected to the WiFi network correctly.
I received following error message:
ArduinoIoTCloudTCP::handle_ConnectMqttBroker could not connect to iot.arduino.cc:8884 Error: -1
What does this "error: -1" means?
Is the Agent running?
The -1 isn't the important part, use verbos output and post entire verify log in code tags please. If the agent missing is NOT the issue.
Here are more verbose print out:
pA:��***** Arduino IoT Cloud - configuration info *****
Device ID: 065502bb-de16-47c0-a12d-cf63f365d8a2
MQTT Broker: iot.arduino.cc:8884
WiFi.status(): 255
Connection to "HSI" failed
Retrying in "4000" milliseconds
Connected to "HSI"
TimeServiceClass::sync done. Drift: -1728080234 RTC value: 1728080255
ArduinoIoTCloudTCP::handle_ConnectMqttBroker could not connect to iot.arduino.cc:8884 Error: -1
TimeServiceClass::sync done. Drift: -1 RTC value: 1728080274
ArduinoIoTCloudTCP::handle_ConnectMqttBroker could not connect to iot.arduino.cc:8884 Error: -1
How do I know if the Agent is running?
I delete the device, Thing and dashboard. Then create a new one. This time, the device is able to connect online. But it is intermittent,
Not sure what causes it to connect or disconnect. Is there a tule how often should I execute the ArduinoCloud.update() function?
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