Log stream format - Gadget-factory/wheelemetrics GitHub Wiki

The BT serial comm modules can all work at 115200 bds => 11520 bytes/s => 57 bytes max/line with 200 hz logging => 115 bytes max /line with 100 hz logging

Commands (followed by LF+CR)

• ? : list all commands
• log : log data 1s (log stops at new command)
• loghi : log data 100hz or 200hz (log stops at new command)
• wh : sends back total 0.1 Wh, rolloever 16 bits (stored in eeprom)
• odo: total revolution, rollover 16 bits (stored in eeprom)
• max : max voltage & max current (stored in eeprom)
• min : min voltage & min current for braking values (stored in eeprom)
• reset : reset max & min values

commands can be in lower case of UPPER case

Do we need '!' at the start of each command ? You decide. I have no preference

data log, high speed, each ascii line (LF CR terminated)

123,-456,78,90,123,456,-7890,1

• 123 => 12.3 V
• -456 => -45.6 A
• 78 => 78°C sensor 1 (mosfets)
• 90 => 90°C sensor 2 (battery)
• 123 => 12.3°
• 456 => 4.56 rps (revolutions per second)
• -7890 => -7890 WS (energy in watts.seconds , '-' => braking)
• 1 => buzzer = ON (0=> buzzer = Off)

data log, low speed, at 1hz sampling rates

same above. uC sampling rate remains at 100hz, mean values are calculated before being sent out)