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

DuncanCT August 23, 2024, 10:10am 5

Hey @mathieu4585 which other device have you tried it on? I contacted arduino support but that said everything is fine.

Does anyone have an Portenta board to test this senario on?

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