Custom Smallest SIM800L GPRS GSM Module MicroSIM Card Core BOard Quad-band TTL Serial Port

Link: https://pan.baidu.com/s/1vI6Y4Rl4S3QCvqOV_iHhaQ?pwd=43d5 extraction code: 43 d5

By default, no pins are welded to reserve more expansion space for customers

Module model: SIM800L

Working voltage: 3.7~4.2V(current peak 1A, please do a good job)

Support network: global quad-band network

Module size: 2.5cmx2.3cm

The serial port is TTL serial port, which can be directly linked with the MCU.

The module is powered on and automatically starts and searches the network

On-board signal indicator (blinking slowly if there is a signal, blinking quickly if there is no signal)

Small size, there is no GSM module smaller than this module

Full machine SMT processing, reflow welding, stable performance factory direct sales

Power supply can be directly powered by lithium batteries, as shown below: