The problem is that I have already found the firmware and how to work with it, but it requires a PicKit3, and I want to make the repair as cheap as possible.
I remembered how I once reflashed an Arduino mini via a nano, and I wanted to reflash Dyson using an arduino nano. But I didn’t find anything like that on the Internet, only a video of replacing a PicKit3 with an Arduino for PICmicrochip firmware. The video is not very clear....
So I don’t know if this repair can be done or if I still have to order a Chinese BMS
If necessary, I can provide additional information, photos!!
The firmware that I want to put on the DYSON battery chip
I have moved your topic back to the appropriate English language category of the forum @contiko_ua.
In the future, please use the forum category appropriate to the language you are posting in. The International categories should be used if you are posting in the language to which they are dedicated, while the non-"international" categories should be used if you are posting in English. Your post is not written in the german language, so why did you move it to the Deutsch category???
Correct topic categorization is an important part of responsible forum usage, as explained in the "How to get the best out of this forum" guide. The guide contains a lot of other useful information. Please read it.
I have also deleted your other cross-post.
Cross-posting is against the Arduino forum rules. The reason is that duplicate posts can waste the time of the people trying to help. Someone might spend a lot of time investigating and writing a detailed answer on one topic, without knowing that someone else already did the same in the other topic.
Repeated cross-posting can result in a suspension from the forum.