Elecrow Crowduino Pro Mini - ATmega328 5V 16MHz Arduino Compatible sd card module You would need at least

You would need at least 3

For heavier code or memory use

Built-in auto-calibration

Current draw: 4 mA

GPRS GSM GPS SIM808 Board for Arduino - Have you ever thought of making a portable tracking device

Elecrow Crowduino Pro Mini - ATmega328 5V 16MHz Arduino Compatible sd card module You would need at leastPro Mini Atmega328 8Mhz Arduino Compatible The Pro Mini Atmega328 8Mhz Arduino Compatible is a microcontroller board based on the ATmega328P microcontroller. It is similar to the Arduino Pro Mini but comes with an ATmega328P microcontroller running at 8 MHz. Because there is no USB port on the Pro Mini Atmega328 8Mhz Arduino Compatible, you must use an external programmer to upload code to the board. The board is relatively small, similar to previous