Does anyone worked on SIM800L module with ESP32 using ESP-IDF framework?

Does anyone worked on SIM800L module with ESP32 using ESP-IDF framework?

I tried the basic pppos_client esp-idf example, but it's not working for me

I'm getting tthe following errors
E (10484) esp-modem: esp_modem_dte_send_cmd(256): process command timeout
E (10484) dce_service: esp_modem_dce_sync(225): send command failed
E (10484) sim800: sim800_init(159): sync failed

Solution

First Using delays, and second do multiple attempts if synchronisation is failed do it again

Jump to solution

wafa_athmaniAPP•5/23/24, 3:56 PM

hello @iamnarendrans Have you tried using a serial terminal program to communicate directly with the SIM800L using AT commands? just to know whether the problem lies with the communication between the ESP32 and SIM800L (hardware or software configuration)

youcef_aliAPP•5/23/24, 3:56 PM

I have worked pppos with sim7600 i take to much time to make it work and not 100%, the issue is in the synchronization in the init, the pppos send At command and wait for feed back, meanwhile the sim module is not ready yet that causes timeout