GSM SIM800L is a small GSM/GPRS module used for communication via a cellular network. It allows devices to send and receive SMS, make and receive calls, and connect to the internet using GPRS. It operates on quad-band GSM frequencies (850/900/1800/1900 MHz), making it compatible with networks worldwide.
GSM/GPRS Support – Can make calls, send/receive SMS, and connect to the internet. Quad-Band – Works on 850/900/1800/1900 MHz frequencies. Small Size – Compact module suitable for embedded IoT applications. Low Power Consumption – Operates at 3.4V–4.4V (typically 4.0V recommended). Serial Communication – Uses UART (TX/RX) to interface with microcontrollers like Arduino, ESP32, and Raspberry Pi. Integrated TCP/IP Stack – Supports HTTP, FTP, and MQTT for IoT applications. VVC:3.7V-4.2V GND:Ground TXD:UART Transmit RXD:UART Receive RST:Reset (Active Low) DTR:Sleep Mode control Power Considerations: SIM800L requires a stable 4V power supply with at least 2A peak current, as it draws high power during network operations. Using a step-down module (e.g., AMS1117-3.3V is not suitable) is recommended, or a Lithium-ion battery (3.7V) for best performance. Applications: IoT projects Remote monitoring and control Home automation GPS tracking (when combined with a GPS module) Emergency alert systems