softwarecrash
commented
1 year ago Have you read at https://github.com/softwarecrash/Daly2MQTT/wiki/Wiring
If you supply the Wemos externally with power: NEVER use for example 5V output of the battery or similar. ALWAYS use a separate USB power supply (cell phone charger). Otherwise there is a risk that the Wemos will be destroyed!
what happens by your wemos? simple its a ground loop, the BMS and/or the inverter close the power connection, and now the gnd from your build goes over the esp and over usb to your inverter, so the magic smoke comes out ;)
note: the BMS cuts only the GND connection, so every thing that will connected to the data ports will supply gnd again, and the wemos or whatever incl. the data ports cant handle the current flow. for save use, use a ADUM1201 and isolate the ESP from the BMS
murfy76
Is there an existing issue for this?
Used Hardware?
Wemos D1 Mini
What happened?
Hello,
I'm experienced second Wemos dead in 2 months. Last time, there was short over current which caused inverter to disconnect circuit. After switch OFF and ON the inverter all start working normally expect Daly2BMS Wemos. It was powered from USB board, like the other two ESP's which survived this normally (NodeMCU and Wemos Lite). Daly2BMS Wemos was placed on the battery pack. If you have any suggestion to prevent this it would be great, thank you.
Peter
PS: Inverter is 3000W peak, it means there was cca >1500W and >60A peak on BMS when it happened. BMS itself continue working normally with BT dongle.
Screenshots / Fotos
Steps To Reproduce
No response
Version
2.x.x and above
Relevant livejson output
Which BMS is connected?
Daly Smart BMS 60A Common Port, LiFePO4 8S 24V
What browsers are you seeing the problem on?
no Issue with the Browser or WebUI