Hello @ggowd.1 ,
To verify basic connectivity, ensure that the ENC28J60 Ethernet controller is correctly configured and that there are no physical connection issues. Since you can ping the IP address, the basic Ethernet setup seems to be working. Next, check your MQTT client configuration, including the server address, port, client ID, username, and password if required. Verify that the MQTT broker is running and accessible from your network. The error codes you mentioned indicate various issues: mqtt_connect return -10 suggests a connection failure, Publish err: -1 points to a publishing failure, and mqtt_connection_cb: Disconnected, reason: 256indicates a lost connection. Consult your MQTT library documentation for more details on these codes. Before diving into MQTT, test your Ethernet setup with a simple TCP echo server/client example to ensure basic communication works and insure you have access to the network. While you can implement Ethernet and MQTT without an RTOS, using one can simplify task management and timing control. For configuring ENC28J60 with RTOS on STM32F407G, set up FreeRTOS, integrate the ENC28J60 driver, use the LwIP stack for TCP/IP communication, and implement an MQTT library compatible with LwIP and FreeRTOS. Use Wireshark for network traffic analysis and add debug prints to trace errors. Ensure the ENC28J60 and STM32F407G are correctly powered and free of hardware issues.
Regards
In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.
