This is the beginning of a Disassembly of an probably V1.x ECU module from an NIU N1S e-scooter.

It basdically consists of am STM32F103 (ARM Cortex M3) controller, a UBLOX MAX-7Q GPS module and a M590E GSM module from Neoway. I'm currently start commenting the STM32 code, identifying basic functions like strcpy or atoi.

I did a much more intense disassembly using Ghidira identifying mostly all functions in the code and tried to document them as good as possible. See the doc folder for indepth analysis.

Additionally, you'll find the dump of the 512k SPI flash ROM. I guess that's being used for saving a new firmware before flashing it into the STM32's internal flash. I conclude this as I found (probably) the same ARM code in there as in my disassembly. I wrote 'Probably' because I did no yet made a diff between those two - if it's an updated firmware, it should differ though.