Running to the software serial limit ? – Everything ESP8266

I haven’t investigated the serial port yet, but try knobbing the baud rate up or down in 1% increments until you see stable data. If it’s worse a bit higher, then start heading lower. You should find a range that they’ll reliably talk at, so set the baud rate to the middle of that range. That’s the best you can do without an oscilloscope (preferred) or decent logic analyzer to see what’s going on there.

The problem could be either the power meter -or- the cheap crystal on the ESP8266 module. You can’t change the power meter, so start with the bits you

CAN

change. It’s been a SERIOUSLY long time since I’ve seen two serial devices that wouldn’t communicate, but then again all of my designs used crystals from prime manufacturers with *real* specs, not from some unknown garage-operation in Shenzen.

Additionally, at 115K you’ll have to keep the wire length below two meters, I’d have to guess. Don’t even think about trying to push 115K down 10 meters of wire: it won’t get there. If your wire is wonky or high capacitance, that’ll mess up the data as well.

You’re probably experiencing a difference in baud rate between the two devices. Serial must have the two data rates within ~5% of each other or it can’t sync reliably.I haven’t investigated the serial port yet, but try knobbing the baud rate up or down in 1% increments until you see stable data. If it’s worse a bit higher, then start heading lower. You should find a range that they’ll reliably talk at, so set the baud rate to the middle of that range. That’s the best you can do without an oscilloscope (preferred) or decent logic analyzer to see what’s going on there.The problem could be either the power meter -or- the cheap crystal on the ESP8266 module. You can’t change the power meter, so start with the bits youchange. It’s been a SERIOUSLY long time since I’ve seen two serial devices that wouldn’t communicate, but then again all of my designs used crystals from prime manufacturers with *real* specs, not from some unknown garage-operation in Shenzen.Additionally, at 115K you’ll have to keep the wire length below two meters, I’d have to guess. Don’t even think about trying to push 115K down 10 meters of wire: it won’t get there. If your wire is wonky or high capacitance, that’ll mess up the data as well.