SailCS33

well thats a great question. Here is a screenshot of what I received for what it's worth.

Just received the answer from JBD. Their engineering confirmed pin 4 on UART is equal to battery positive to power their BT module. So...

Sure it does but I thought it needs 5v and will it become a toaster if given 13v?

I believe UART and RS232 are not interchangeable terms. UART is an interface while RS232 is a protocol/standard. RS232 communication can...

Thank you, you right I should not need this pin to connect to the laptop. Do you happen to know if this voltage will become a problem...

Took some pictures today to show what I mean.

I just received JBD SP04S034-H BMS. The seller forgot to include the BT module. While I am waiting for them to send it, I wanted to...