MI BMS - error 21

bellaminoboy
Posts: 1
Joined: Thu Feb 24, 2022 9:17 am

MI BMS - error 21

Postby bellaminoboy Thu Feb 24, 2022 9:22 am

Hello,

i have rebuilt my M365 battery with new cells and wanted to reset the charge times counter. I flashed the BMS via ST link, (program memory) and got an nice flashing blue led but E21 (no bms data). I tried to flash also data memory hex, but no luck. I followed all stepy by conejo (changing 1020, 1030,1060...) but no luck. I even tried desoldering the ST chip from a working bms and soldering to the non working BMS but again its same. I tried all other steps again with second chip, no luck

Any suggestion?

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