GSM/GPRS WiFi Camera Module breakout Board A20 IoT


With an Arduino-programmable Espressif ESP8285 at its core, the A20 module combines WiFi, Quad-band GPRS, and onboard camera support. This breakout board allows you to route power to the different subsystems using an array of DIP switches, minimizing current consumption when you only need part of the module’s capabilities. The board can function, with the ESP8285 SoC disabled, as a GPRS modem with UART interface. Or you can flip a couple of switches to enable the WiFi SoC and give it a connection to the GPRS module. And if you only need WiFi for your project, you can disable the GPRS radio altogether. All module pads are broken out as pins. Note: requires a 2A power supply when operating with all subsystems enabled.

  • Breakout board dimension: 34.2 x 51.9 mm
  • A20 module dimension: 22.6 x 19.6
  • Operating Voltage: 3.3V - 4.2V
  • Working Temperature: -30 ℃ to +80℃
  • Boot Voltage: >3.4V
  • Standard Power supply: DC 5V, 1A
  • GSM/GPRS Frequency Band: including 850, 900, 1800, 1900 MHZ
  • GPRS Class 10
  • Sensibility: <-105
  • SMS message: Support
  • GPRS maximum speed: Download speed 85.6Kbps, Upload speed 42.8Kbps
  • Camera resolution: 0.3M
  • Support Picture translate, maximum speed 16KB/S
  • Image format: JPEG
  • Image resolution: VGA(640*480), QBGA(320*40, QQBGA(160*120)
  • ESP8285 WiFi IC
  • AT Command: Support standard GSM07.07, 07.05, and extended Ai Thinker command
  • Audio: Support digital and analog audio, support HR, FR, EFR, AMR audio code
  • Certification: ROHS, FCC, CE, CTA


  • IoT
  • Outdoor monitoring
  • Agricultural monitoring
  • industrial monitoring
  • Smart home
  • driving exam system
  • Visual Access Control System

A20 module Pins Explanation:

Breakout board dimension:




A6_A7_A6C_A20 AT Command V1.03.pdf

ESP8285 datasheet

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