Failed to create MQTT task

[nzh912]

Code: Select all

E (110796) MQTT_CLIENT: C:/Users/msys32_stable_v3.3.1/home/Admin/esp/esp-idf/components/mqtt/esp-mqtt/mqtt_client.c:482 (esp_mqtt_client_init)
: Memory exhausted
W (110806) MQTT_CLIENT: Client asked to stop, but was not started
E (110816) MQTT_CLIENT: Client was not initialized

i got this error when my esp32 failed to create mqtt task.

[ESP_Sprite]

Okay. What is your question?

[nzh912]

the error showing that memory exhausted when initializing the mqtt client.

How to fix this problem? is there any way i can do to flush the memory or clean the memory.

[ESP_Sprite]

It means that there is no more free memory. You need to use less memory in the rest of your program.

[nzh912]

It means that there is no more free memory. You need to use less memory in the rest of your program.

beside reduce the memory usage of my program, is there if i use external SRAM can increase the memory size?
Now i am developing the program using ESP32-WROOM-32D (4MB).

[ESP_Sprite]

You could switch to a module with PSRAM, indeed.

[nzh912]

thank you for the info.

Beside that, it seem like the wifi task took a lot of memory, is there a method i can flush out/clear the wifi memory ?

[ESP_Sprite]

I think you can set the amount of tx/rx buffers in menuconfig. This will impact your WiFi speeds a bit, though; not sure if that's very relevant if you only send/receive mqtt messages.