Place the SIM800L library folder into your \Documents\Arduino\libraries folder ... If you define and pass reset pin of your board you can reset GSM by external reset pin of the SIM800l GSMTime(time) ...

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👍Support WIFI and GSM dual network(you can use GSM if there is no WIFI, The WIFI only can work with 2.4G, not work with 5G), Different alarm status: away arm, home arm, delay arm and timely arm ...

👍Support WIFI and GSM dual network(you can use GSM if there is no WIFI, The WIFI only can work with 2.4G, not work with 5G), Different alarm status: away arm, home arm, delay arm and timely arm ...

In this Arduino Project, you will also learn how to build an Arduino smoke alarm that sends SMS Alerts without needing to rely on the GSM module. The Arduino UNO R4 will detect fire or smoke using the ...

Learn how to send SMS alerts from NodeMCU using Wi-Fi and Circuit Digest’s free SMS API, without a GSM module. A simple and cost-effective solution for real-time IoT notifications. Free SMS API for ...

I recently built a Home Security Movement Detector Device using Arduino, GSM Module (SIM800L), and a PIR Sensor. This device automatically detects movement and calls a predefined number for ...