This was forked from https://github.com/htvekov/iem3155_esphome and then heavily adapted for this version
- XY-017 'Noname' AliExpress TTL <--> RS485 module
- Simple, cheap module
- Supports both 3.3 and 5v
- 'No hazzle' module with hardware automatic flow control
The iEM3155 device also offers some additional interesting features that might be useful for others. Tariff/tariff rates and overload alarm. There's also both a digital input and output port that can be utilized as well.
Check the iEM3155 user manual/technical datasheet for further info