hi --if you get total frustrated you can always try this method – it not wired directly it connect the oemtx via wireles connection to what ever controller you want — Howto --emonTx - Shield ESPEASY and WEMOS R3 UNO
you need a wemos R3 uno/esp and and a oemtxshield
espeasy has a controller for oem to send to it via wireless connection or you can follow say this to a certain degree and send it directly to home assistant