fitbit aria

Contains some informations about the serial port commands on the fitbit aria scale.

Serial port

UART on UART1 Baud: 115200 Data bits: 8 Stop bits: 1 Parity: None Pin out (standard TTL-232RG):

1. GND
2. CTS#
3. VCC
4. TXD
5. RXD
6. RTS#

Pin out (standard TTL-232RG):

1. GND
2. CTS#
3. VCC
4. TXD
5. RXD
6. RTS#

Credit: http://pooloferrors.com/project/2015/01/10/fitbit-teardown.html

Notes

• Do not use navigations keys (arrow keys) nor delete or backspace.
• Commands results end with END.
• Enter should process the latest commmand
• Console may not work while the device is sleeping, you have to wake it up (the only know way I know it to step into it)

Commands

This documentation is based on manual tests and not by reverse engineering the firmware

• fwver : Return the firmware version
• hwrev : Return the hardware version?
• deviceid : Return versions
• bat : Return battery informations
• lcdtext : Display text on the screen (case sensitive) Know character availables :
  • a = display a checkbox
  • -- = display ...
  • A-Z
  • 0-9
  • /
  • .
  • !
  • %
  • ?
  • (
  • )
• lcdpat <hexa value from 0 up to FFFF> : Allow you to manually control some lcd segments
  • bit 1: display a "x" and refresh icon as well as the upper rounded bar (where pixels are alternatively on and off)
  • bit 2 to 7 display one line of the text line (2 is the top line and 7 is the bottom line; where pixels are alternatively on and off in the same line)
  • bit 8 Display the "wifi" icon, the no battery icon and the upper rounded bar (where pixels are alternatively on and off)
• icon <0 from 16> specific led of the upper rounded bar to turn off. 0 hide the bar while 16 display it full
• pbar <value between 0 up to 16> : Allow you to control the upper rounded bar (the bar use to display the progression when "thinking"). LCD will turn on from the left to right.
• pwm <value from 0 to 10> : control the brightness of the screen getsn : Get serial number of the device getmac : Get the mac address setcolor : getcolor : setunits : getunits : weigh : return 2 weights The first one is probably the weight with the tare and unit managed while the second is the raw value. htcmd : send a raw command to the HT16C23 (lcd driver) scan : Scan wifi available