Sim800L Introduction

Basic examples to test

• AT => Once the handshake test is successful, it will back to OK

• AT+CSQ => Signal quality test, value range is 0-31 , 31 is the best

• AT+CCID => Read SIM information to confirm whether the SIM is plugged

• AT+CREG? => Check whether it has registered in the network

  AT+CMGF=1 => // Configuring TEXT mode

  AT+CMGS=\"+ZZxxxxxxxxxx\" => //change ZZ with country code and xxxxxxxxxxx with phone number to sms, then eneter text

  AT+CMGS=\"+918766XXXXX\" AT+CMGS=+918766XXXXX

AT+CMGS=\"8766XXXXX\" AT+CMGS="8766XXXXX" send 26 in DEC => (substitute)