Thanks for looking into this. I used the hex view plugin and could send binary data, eg 128 as 0x80, and in hex that does indeed output that as 0x80 rather than sending ascii data. Apologies if I misunderstand the feature but I’m pretty sure it’s sending binary data as connecting the tx and rx pins does return me binary data when I send it using hex
I tried this, but I must have done something wrong because it’s not working. I need to check it.
And now with the new version of ESPHome I don’t want to update the code until there is a tested version.