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This sketch turns a Freematics ONE device into a wireless (WIFI) vehicle data collector and transmitter. The live data of a car, including OBD-II, GPS and MEMS sensor data, is collected in realtime, cached in SRAM and pushed to a HTTP server by HTTP POST continuously.


  • Freematics ONE with ESP8266 WIFI module - http://freematics.com/products/freematics-one
  • Arduino IDE (for compiling and uploading the code)
  • A Freematics Hub server key
  • A wireless AP or hotspot with known SSID and password
  • A car with OBD-II port