Here, I’m using the SIM800L and Arduino Nano V3 to develop a nifty one-channel SMS relay. The device is ... and the modem (SIM800L) gets around 4.3 Vdc. Though most SIM800L modules work on 3.7 V, my ...

Because it uses the serial communication method, it’s easy to interface with the UART of almost all popular microcontrollers. There are 12 connections in total (6×2 rows) on the SIM800L module and, ...

He decided to go with the low-cost SIM800L GSM modem, ... If the GSM module receives a call, ... screens, and other stock units, including an Arduino-based processing core, GPS, NFC, ...