I have an Opta connect via ethernet to a Mosquitto MQTT broker on a Raspberry Pi. Sketch uploads are done by the IDE 2.3.0 and version 4.1.1 Arduino Mbed OS Opta Boards is installed. This is the sketch i used for the Opta. pubsubclient/examples/mqtt_basic at master · knolleary/pubsubclient · GitHub …

Opta fails to reconnect to MQTT broker after broker restart

lopkip March 3, 2024, 6:56pm 2

I have the same problem using WiFi with the MQTT-library from Joel Gaehwiler.

Topic		Replies	Views
Arduino as MQTT Client Disconnecting Problem Networking, Protocols, and Devices	7	9636	May 6, 2021
Arduino as MQTT Client Disconnecting Problem General Discussion	1	1155	May 5, 2021
Arduino UNO WiFi keeps reconnecting to MQTT server Programming	3	1801	May 5, 2021
CC3000 not reconnecting to Mqtt broker Home Automation	1	1452	May 6, 2021
MQTT automatic reconnect function – keep alive Networking, Protocols, and Devices	1	1764	May 6, 2021