I’m trying to write new firmware to my emonTH 2, but I can’t seem to connect correctly to the header on the board.
I have a couple of these - DSD TECH Official Website: USB to TTL Serial Converter to hand.
Based on the pin-outs here - emonth2/emonth_V2.0.2_sch.png at master · openenergymonitor/emonth2 · GitHub - it looks to me very much like I need to make these connections and I should be in business -
5V on the converter to 5V on the emonTH
GND on the converter to GND on the emonTH
TX on the converter to RX on the emonTH
RX on the converter to TX on the emonTH
Except it’s not working for me. I’ve connected the converter to my Linux machine and can see /dev/ttyUSB0 appear, so the PC can see the controller. However, when I open a serial monitor window I get nothing at all back. I’ve tried a bunch of baud rates but still no joy.
Can someone clarify what the correct settings (or process) are for making a serial connection to the emonTH please?