If Arduino is your development platform of choice the tiny self-contained MicroLink board offers some interesting features. At just 50 x 32 mm it contains an ATmega328, an SIM800H quad band GSM module and on-board USB and battery charging capabilities. It has all the peripherals necessary to allow wireless remote control and monitoring and can use any standard 3.7 V LiPo battery for power which is charged when the USB port is connected. The charge state can be checked at any time from a remote location.
Key technical features:
- Atmel Atmega328P microcontroller – same as Arduino UNO
- Latest generation SIM800H module (850/900/1800/1900 MHz)
- Genuine FTDI USB chip
- Interrupt pins available
- An LED is connected to pin D13, same as the Arduino UNO
- Gold plated IPEX u.Fl antenna connector
- Quad-band multi-region antenna included
- Accepts standard sized SIM card
- 6 µA sleep current (Extra Flash: 11 µA)
- Approx. 10 mA typical processing current
- Approx. 400 mA net peak momentary current during GSM events
- Can be powered and programmed by USB Micro USB
- UART (Serial), SPI, and I2C peripherals
- Atmega328P talks with SIM800H using AT commands (easy, reliable)
- 0.1 inch pitch pins - can fit on a standard breadboard.
AALER Engineering is responsible for the design and they are hoping to raise $40,000 AUD from their Kickstarter campaign which still has around 30 days to run.