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# ESPHome-modbus-heatpump-Gree-Versati-III # ESPHome-modbus-heatpump-Gree-Versati-III
** Info: **
Tento návod popisuje jak připojit zařízení do Home Assistant přes modbus protokol pomocí ESP a RS485/TTL převodníku.
V tomto případě jde o připojení tepelného čerpadla Gree Versati III.
** Komponenty: **
- ESP8266 / ESP32
- RS485/TTL converter: [SHOP](https://www.laskakit.cz/prevodnik-ttl-na-rs-485--max485/)
## ESPHome code
```
uart:
id: mod_bus
tx_pin: GPIO16
rx_pin: GPIO17
baud_rate: 9600
stop_bits: 2
modbus:
flow_control_pin: GPIO23
send_wait_time: 100ms
id: modbus_versati3
modbus_controller:
- id: versati3
## the Modbus device addr
address: 0x1
modbus_id: modbus_versati3
setup_priority: -10
update_interval: 15s
number:
- platform: modbus_controller
modbus_controller_id: versati3
name: "nasi_komora_modbus_tank_target_temp_set"
address: 13
unit_of_measurement: "°C"
value_type: S_WORD
entity_category: config
sensor:
- platform: modbus_controller
modbus_controller_id: versati3
name: "nasi_komora_modbus_tank_target_temp"
address: 13
unit_of_measurement: "°C"
register_type: holding
value_type: U_WORD
accuracy_decimals: 1
# filters:
# - multiply: 0.1
```