A ESPHome components that wraps the Arduino based udp gateway NibeGW up for use with ESPHome configuration.
When Modbus adapter support is enabled from the heat pump UI, the heat pump will start to send telegrams every now and then. A telegram contains a maximum of 20 registers. Those 20 registers can be configured via the Nibe ModbusManager application.
A telegram from the heat pump must be acknowledged, otherwise the heat pump will raise an alarm and go into the alarm state. Acknowledgement (ACK or NAK) responses should be sent correctly. This component will ACK/NAK and then forward received data to a configured UDP port on a remote host. It will also accept read/write requests on UDP to request other parameters.
You will need an esp32 with some type of RS485 converter hooked up to a UART. It can either be a MAX485 based chip or a chip with automatic flow control like a MAX3485. If using an automatic flow controlling chip, set the dir_pin to an unused GPIO pin on your board.
Add the following to a ESPHome configuration to enable the udp gateway feature to the device.
external_components:
- source:
type: git
url: https://github.com/elupus/esphome-nibe.git
components: [ nibegw ]
nibegw:
dir_pin: GPIO4
rx_pin: GPIO16
tx_pin: GPIO17
uart_id: 1
udp:
# The target address(s) to send data to. May be a multicast address.
target:
- ip: 192.168.16.130
port: 10090
# List of source address to accept data from, may be empty for no filter
source:
- 192.168.16.130
acknowledge:
- MODBUS40
# Constant replies to certain requests can be made
constants:
- address: MODBUS40
token: ACCESSORY
data: [
0x0A, # MODBUS version low
0x00, # MODBUS version high
0x02, # MODBUS address?
]Currently no actual parsing of the payload is performed on the ESPHome device, this must be handled by external application.
This components is based on the NibeGW code for arduino from OpenHAB Nibe Addon (src)