Open navidkashi opened 1 year ago
Ensure that the 4g module is reset after the chip is up. If the 4g module is not reset, or the AT communication is initiated before the 4g module is completely reset, the AT communication failure will occur. Can be connected to MODEM RESET The reset pin from GPIO to 4g module can also be reset manually. In addition, the waiting time after reset should be adjusted according to the actual reset time of the module. https://github.com/espressif/esp-iot-bridge/blob/master/components/iot_bridge/src/bridge_modem.c#L38
I'm using LilyGo SIM7600 and the esp-iot-bridge to share internet access from LTE modem to WiFi clients. I configured the TX, RX, and power pin in sdkconfig and used extended DCE, but when module turned on this error appeared in LOG. It seems that module doesn't response to AT command.