# M5Stack SIM800L Module

[中文](/zh_CN/product_documents/modules/module_sim800) | English | [日本語](ja/product_documents/modules/module_sim800)

## DESCRIPTION

The M5Stack SIM800L Module is a module with small SIM800L GSM/GPRS
module. You can program it after connected to any series of M5Stack Core
through Blockly, Arduino or MicroPython.

SIM800L is a complete Quad-band GSM/GPRS solution. SIM800L moudle could
be connected with M5Stack Core via a serial port named USART2.
Absolutely, you also can change the serial port number with jumper by
your own.

## FEATURES

-  SIM800L Module
-  Build-in Antenna
-  3.5 mm phone audio jack and MIC(MIC is disable. If you want to enable it, you need to weld a 0 ohm resistor for enabling.)
-  Microphone
-  Parameter:
-  GSM/GPRS
-  support Quad-band 850/900/1800/1900MHz
-  transmit Voice, SMS and data information with low power consumption
-  Featur Bluetooth and Embedded AT

## PinMap

*After SIM800 was stacked with M5Core, they communicat through UART2*

**SIM800**

| SIM800 Pin        | ESP32 Chip      |
| :----------:  |:------------: |
| TXD        | GPIO16         |
| RXD        | GPIO17         |
| RST        | GPIO5         |

## INCLUDES

-  1x M5Stack SIM800L Module

## Applications

-  Nitrogen dioxide alarm
-  Automatic Web Spider SMS-notifier
-  Remote meter reading system

## DOCUMENTS

<!-- -  [Example](https://github.com/m5stack/M5Stack/tree/master/examples) -->
-  [SIM800L Info](http://simcomm2m.com/En/module/detail.aspx?id=138)
   (SIM800L)

- [Purchase](https://www.aliexpress.com/store/product/M5Stack-Official-In-Stock-GSM-Module-SIM800L-Stackable-IoT-Development-Board-for-Arduino-ESP32-with-MIC/3226069_32843211923.html?spm=2114.12010615.8148356.20.25e96be7xE1y22.html)