A cost efficient and fully funtional prototype
Site for Reference: https://randomnerdtutorials.com/esp32-sim800l-publish-data-to-cloud/ SIM800L GSM MODULE Details: https://www.elecrow.com/wiki/images/2/20/SIM800_Series_AT_Command_Manual_V1.09.pdf Using SIM800L: https://lastminuteengineers.com/sim800l-gsm-module-arduino-tutorial/
- 3.7V 160mAH (Lithium Polymer) Lipo Rechargeable Battery Model
- SIM800L GSM cellular chip
- 3dBi GSM antenna along with a U.FL to SMA adapter
- LM2596 DC-DC Buck Converter Adjustable Step Down Power Supply Module (only for out of range voltages)
- Arduino UNO Board
- NodeMCU