Electric Scooter Forum for Scooter Enthusiasts, Scooter Chargers, and Scooter Mechanics.

Discuss the Xiaomi mijia mi M365 original and pro versions in this forum. Topics include hardware, software, hacking, riding, and everything in between.
#13056
I have 5 former birds bought at auction, put new brains on 4 and they all worked great, the fifth wont start. I tried known working boards/swapped handlebars with other m365 s and the problem isnt there, it has to be in the lower half so I opened the battery case. Tested voltage out of battery at 41.6 volts and a blue light is blinking. If I plug in charger light goes to steady red. Are there any tests I can do to the lower controller. I have seen videos of people takeing apart the battery to test the z fuse and also to change the battery management board but I would like to test other things non-destructively first. Has anyone put together a checklist for troubleshooting these things?


#13106
I went the other route, I swapped batteries with one from a working scooter, its definitely in the lower controller, I have ordered a generic replacement , I also noticed the moisture sensing stickers in the front are reddish so I think it must hace gotten some water

#13153
JonDon wrote:
Thu Jul 18, 2019 12:18 pm
TheJas0n wrote:
Tue Jul 16, 2019 3:53 pm
I plugged a charger into one of my auction scooters and it does not switch from green to red for charging. Does anyone know the troubleshooting steps to figure out why this won't start to charge? Do I have to remove the battery cover? Thanks for the help!
I would start by checking the charging socket, especially if the scooter is in a beat up, bad condition. Just unscrew the two screws and pull out the charging socket and test with a multimeter the connection. Next thing to test is the battery pack, but that's a bit more difficult To view images REGISTER or LOGIN for full access.
Adding to what JonDon says...
Hopefully the problem is the charging socket - that's an easier item to handle.

When I encountered this problem (after determining that the issue wasn't the charging socket), I removed the battery cover panel from the bottom of the scooter. The BMS (battery management system?) circuit board, which is enclosed and attached with the battery pack, would flash a small red light (maybe 5 blinks?) when I attempted to charge. A working BMS should flash blue.

Before I knew that this flashing red light indicated the BMS won't allow the battery to charge, I tested the battery with a voltmeter and it read ~14V. I stopped there and started shopping for a new battery pack. Replacing a bad BMS card or repairing a low voltage battery are beyond my skill set. I believe that trying to revive the battery is dangerous.

I suppose your problem could be either the BMS card, the battery itself, or both.

Does anyone agree/disagree?


#13502
Stories8106 wrote:
Sun Jul 28, 2019 12:41 am
I'm making a full on tutorial video, not the half bit things that are out there. It should be uploaded tomorrow at some point.

I too am running into the battery issue.
Any luck on this? I’m reading a bit below 14v on the battery pack. 4 red blinks. Should I hit the reset button on the battery BMS? I’m not feeling that any of the battery contacts are loose or broken but haven’t removed the battery.


#13885
SinisterSinister wrote:
Sat Aug 10, 2019 12:33 pm
did anyone try the conversion with the Pro Dashboard
I am running three of these 15USD Pro Dashboards. The PRO - FULLSPEED Firmware from RollerPlausch is a good preconfigured firmware. Just install the dashboard and flash the firmware with m365 DownG.

PS: The Pro Dashboards from different AliExpress sellers are all the same, I ordered from 4 different stores.
lurkinglime liked this

#14290
JonDon wrote:
Sat Aug 10, 2019 3:41 pm
SinisterSinister wrote:
Sat Aug 10, 2019 12:33 pm
did anyone try the conversion with the Pro Dashboard
I am running three of these 15USD Pro Dashboards. The PRO - FULLSPEED Firmware from RollerPlausch is a good preconfigured firmware. Just install the dashboard and flash the firmware with m365 DownG.

PS: The Pro Dashboards from different AliExpress sellers are all the same, I ordered from 4 different stores.
I bought the Pro Dashboard from Scooterclone on ebay and is on the way. I did some research on using custom firmware with the Pro Dashboard and found people recommending to use DRV155 customized by GONKA. Found it here https://www.spzshop.com/blogs/best-prac ... it?lang=en

any idea what the differences between DRV155GONKA and DRV155FULL-SPEED is?


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