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# ESPHome modbus - heatpump Gree Versati III
## Description:
This manual describes how to connect the device to Home Assistant via Modbus protocol using ESP and RS485/TTL converter.
In this case it is about connecting a Gree Versati III 10kw heat pump.
## Info:
- use only shielded cable, otherwise the error "Modbus CRC Check Failed!" may appear in the log.
- put a 120 ohm resistor after the last connected device
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- for addresses that are read/write use the "number" class (you can then change their values in lovelace)
- for each register you want to have in HA you have to create a separate sensor in ESPHome
## Lovelace:
![lovelace](https://github.com/peca2345/ESPHome-modbus-heatpump-Gree-Versati-III/blob/main/IMG/Lovelace.png?raw=true)
## Components:
- ESP8266 / ESP32
- RS485/TTL converter: [SHOP](https://www.laskakit.cz/prevodnik-ttl-na-rs-485--max485/)
## Schematic:
![Schema](https://github.com/peca2345/ESPHome-modbus-heatpump-Gree-Versati-III/blob/main/IMG/schematic.png?raw=true)
## ESPHome code:
```
uart:
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filters:
- multiply: 0.1
```