delay(5000); gsm.println("AT");
Here’s a useful technical write-up on the , commonly found in low-cost IoT and educational GSM modules. Practical Guide: GSM Shield with Spreadtrum 1.6 1. Overview The GSM Shield Spreadtrum 1.6 typically refers to an Arduino-compatible shield (or standalone serial module) built around a Spreadtrum SC6531 or SC6531E baseband processor running firmware version 1.6. These shields are popular in hobbyist and cost-sensitive M2M projects due to their low cost , quad-band support , and integrated TCP/IP stack . gsm shield spreadtrum 1.6
void setup() Serial.begin(9600); gsm.begin(9600); delay(5000); gsm
void loop() if (gsm.available()) Serial.write(gsm.read()); if (Serial.available()) gsm.write(Serial.read()); void loop() if (gsm.available()) Serial.write(gsm.read())
