GSM+WiFi Dual Mode A20 Converter Board SMS Voice Development Board Support GPRS Camera

GSM+WiFi Dual Mode A20 Converter Board SMS Voice Development Board Support GPRS Camera

Description:
- A20 is the 2 in 1 module with GRPS and WIFI, also support camera, WIFI chip is ESP8285.
- The GPRS and WIFI part can be independently power supply and working , no interference.

GPRS mode:
Only supply power to GPRS, using MCU control GPRS through seriel port

WIFI mode:
Only supply power to WIFI part,  using MCU control WIFI part through seriel port

GPRS + WIFI mode:
Control GPRS and WIFI respectively through 2 seriel ports.

Wifi main MCU, control GPRS mode
User takes ESP8285 of WIFI part as main controller to control GPRS.

Features:
- Size 22.80 * 19.80mm;
- Working temperature -30 DEG C to+80 c;
- Operating voltage 3.3V-4.2V;
- Boot voltage >3.4V;
- Power supply: DC 5V 1A;
- Supports four GSM/GPRS bands, including 85090018001900MHz;
- Supports China Mobile China Unicom's 2G and global GSM network;
- Supports serial and network communications;
- Supports SMS sms;
- Support camera, image compression format: JPEG standard;
- Image resolution: VGA (640*480), QBGA (320*40), QQBGA (160*120), can be set through the serial command;
- Support the transmission of images, the highest speed of 16KB/S;
- Support external 300 thousand pixel camera;
- GPRS Class 10;
- Sensitivity < -105;
- Built-in ESP8285 WiFi chip, support WiFi chip two development;
- Support GPRS data services, the maximum data rate, Download 85.6Kbps, upload 42.8Kbps;
- Supports digital audio and analog audio, support HR, FR, EFR, AMR voice coding;
- Supports ROHS, FCC, CE, CTA authentication

Package Contents:
- 1 x Development Board