hhc_n8i8op_mqtt

HHC-N8I8OP MQTT gateway. Publish your relay board as MQTT topic tree. Can support several boards at same time. Connects to MQTT broker at localhost, default server port. (edit: this modified version supports to configure MQTT host, user and password to connect your MQTT broker.)

You have to set your HHC-N8I8OP as UDP service, port 5000. Change INPUT_MODE to Trigger to get local inputs control relays. https://es.aliexpress.com/item/4000120026245.html

modified version setup:

First clone this repo. run python3 setup.py or:

• rename default_config.yaml to config.yaml
• rename default_inventory.yaml to inventory.yaml

change values of config and inventory files

usage:

start script: python3 relay_manager.py

command topic:

set relay 1:

• iot/relay_board_1/1/state/set -> ON or OFF

state topic:

read relay 2:

• iot/relay_board_1/2/state -> ON or OFF

Run script on PM2 process manager

• Simply install first PM2
• cd hhc_n8i8op_mqtt
• run pm2 start relay_manager.py --name relay_manager --interpreter python3
• When you tested that everything is running smoothly. Enter command: pm2 startup and follow instructions. Script is running now on your server properly after server restarts or script fails.

Side note! When you update pm2 or python you may need to run pm2 startup again.

Home Assistant setup

You need to configure mqtt switches like this:

- platform: mqtt
  name: "Relay Board - Relay #1"
  command_topic: "iot/relay_board_1/1/state/set"
  state_topic: "iot/relay_board_1/1/state"
  payload_on: "ON"
  payload_off: "OFF"
  qos: 1
  retain: false

Where relay_board_1 in topic's is same as relay board name in inventory.yaml

Local inputs

• If you want control relays locally via inputs you have to configure relays INPUT_MODE from Ordinary to Trigger. This will happen in config app and you may have windows pc. I don't have tested on emulators/virtual machine.
• Loop wire to COM and GND
• When +5v to IN(x) connections works. Use momentary switches to control relays locally.
• IN9 is all ON.
• IN10 is all OFF.