Only get "online", no data about pylontomqtt

[graham22]

I used the tool from Orient Power to help develop the code, (https://www.opsolarbattery.com/download-center). If you can get the battery data using this code from a PC then it should work with my code. You should also make sure you're using the correct baud rate (the default is 9600)

[ellingo]

RS232 isn't always easy.
I decided to use the RJ11 to DB9 cable I purchased from Orient Power together with a USB to RS232 converter. They fit together.
I purchased a RS232 hardware driver, but not the same as shown in the Wiki here.
The first problem was that I now had two female DB9 connectors. I connected them with a male-male gender changer. Then I noticed the RX LED on the RS232 driver was flashing once in a while and not the TX LED. I assumed that was wrong and that it should have been the TX LED (ESP32 sending command). I swapped the RX and TX wires on the ESP32. It was still not working so I replaced the DB9 gender changer with a null modem. That was a success.