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Basic idea: SoC indication hack

The BMS makes a 0-10V signal, that is interpreted by the display as state-of-charge in a linear way:

  • 0V -> 0%
  • 5V ->50%
  • 10V -> 100%

The bike does not assist if the SOC is 0.

With no signal

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B2 as SOC signal

Bad reading of course, but the bike works! B- to B2 voltage was 7.1V, so I got 71% displayed.

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Suppling SoC signal with desktop power supply

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Nicolás's cheating board

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