Arduino Compatible Mayfly Data Logger And Environmental Monitoring Developer Board Now Available. 12:38 pm June 1, 2016 By Julian Horsey. ... – Onboard realtime clock (RTC) (DS3231) ...

It is an Arduino compatible board (hardware, not footprint) based on the ATMEGA1284P which can be programmed to collect and post data to internet logging sites such as Thingspeak or Xively.

The extendable Arduino GPS data logger consists of a shield that is fitted with the GPS receiver, SD card reader, and accelerometer, together with an Arduino UNO board.