Sim800L GSM module

migbur
Posts: 12
Joined: Mon Mar 12, 2018 1:57 pm

Sim800L GSM module

Postby migbur » Thu Apr 12, 2018 10:18 am

Hi
Im using a GSM module, using :
#include <HardwareSerial.h>
HardwareSerial SIM800L(1);

setup:
Serial.begin(19200);
SIM800L.begin(9600, SERIAL_8N1, 16, 17);

While I used esp32 connectet to my PC works fine, if I disconnect the pc USB cable it loose GSM module connectivity.

Please help.

juan3211
Posts: 1
Joined: Tue Mar 06, 2018 7:33 am

Re: Sim800L GSM module

Postby juan3211 » Tue Apr 17, 2018 2:43 pm

check stability of your power supply for SIM800L, it need also up to 2A.

Probably is not a issue with ESP32, it is a issue with power supply.

migbur
Posts: 12
Joined: Mon Mar 12, 2018 1:57 pm

Re: Sim800L GSM module

Postby migbur » Fri May 25, 2018 10:21 am

Hi thanks, yes was not ESP problem, was low power input to the GSM module.

Problem solved

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