softwarecrash
commented
2 years ago hi, in my case the BMS chip have not enugh power to pull down the high rx-pin from the esp. esphome uses softwareserial (i think) other pins are not pulled up, the hardware rx from the esp is default pull-up and not changeable. i heared from another bms that need a ttl level converter with only 3v3 connected to work. some other daly bms will work without any thing. another possibil reason is a bug in the code that i cant find or figure out
Hi, I was looking at your connection diagram and was wondering why I have to use an transistor? Other projects like ESPHome do not mention a transistor whatssoever ... Could you explain why the transistor is needed in more detail in the README?