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I like your workaround... very smart. I was trying to figure out what exact ESP board you have (must be the ESP32)...I misunderstood your previous post. That one does have 3 serial ports. Some of the ESP boards have a serial that is transmit only and cannot receive. That may be the case with...

Thanks Nick! That would be amazing! I am really challenging these batteries in our rv using them to run the ac and have a solar array (not to mention in Minnesota). So I would really like to be able to get some graphical feedback as to where the voltage, temperature and SOC are at.

I am wondering if anyone has got the Arduino-XP-BMS code to work with a Mega board (I do see the ESPs above). I would like to use the Arduino Mega 2560 so I can merge this code with the code for getting a graphing interface on a LCD like in this project...

It has been a while since I have messed with an ESP board but my guess is some kind of serial conflict. It looks like you are hooked up to serial 0 on the ESP through pins 13 and 15? If this is the case you have to very careful the Serial.swap command is used after Serial.begin. You might even...