I’ve released an expanded Modbus/RS485 Wingboard for community design review
I’d welcome design comments, on https://github.com/EnviroDIY/Mayfly-Modbus-Wing/issues/3 by Monday 2022-July-20 12noon PST. Easier to correct any possible problems early on, than find them later on the PCB. As the old clothes tailor saying goes “measure three times, cut once”. 🙂
Discussion on desired Modbus usage or general questions could be made here. I should note that this is a private initiative, not funded by EnviroDIY, but I am using it as a part of a public discussion for an open source board design.