Datasheet

Module SIM800L
Description
Product Features
3.5 mm phone audio jack
MIC (MIC is disable by default. To enable it, you will need to weld a 0 ohm resistor at MIC-EN )
Supply voltage: 3.8V - 4.2V
Recommended supply voltage: 4V
Power consumption: sleep mode < 2.0mA idle mode < 7.0mA GSM transmission (avg): 350 mA GSM
transmission (peek): 2000mA
Module size: 25 x 23 mm
Interface: UART (max. 2.8V) and AT commands
SIM card socket: microSIM (bottom side)
Supported frequencies: Quad Band (850 / 950 / 1800 /1900 MHz)
Antenna connector: IPX
Spring Antenna on board
Status signaling: LED
Working temperature range: -40 do + 85 ° C
Product Size：54.2mm x 54.2mm x 12.8mm
Product weight：16.5g
PinMap
SIM800
M5Stack Fire has occupied GPIO16 / 17 to connect with the PSRAM by default, it's conflict
with TXD / RXD (GPIO16, GPIO17) of SIM800L module. Therefore, when using the SIM800L
module with the M5Stack Fire, you might have to cut the TXD and RXD from SIM800L module
and wire fly to another set of UART pin
M5Stack Docs
SIM800L
is a cellular phone module, integrated SIM800L, a GSM/GPRS module, only cpmpatible with 2G
network. if you want to integrate a cellular module into your design with vioce, text and SMS, this hand-
solderable module is pretty nice!
Series Protocol: UART