I´ve just tried to program the dashboard with a RPi whick went fine. Then downloaded a custom firmware and used he app ES_downG.
The firmware was 1.3.9 but after firmware update was completed the scooter turned itself of totally. No way of contacting it via bluetooth etc and the battery was reported at 39%.
I have obviously missed something important. The model is a ES4 that has been scrapped but is in OK condition.
Can anyone here help me in the right direction?