mqtt_io as a service

[mattb1908]

Hi Im using openhabian on a raspberry pi 4
Im trying to run mqtt_io as service, have created "runmqttio.py"

which is:

import os

cmd = 'python3 -m mqtt_io /home/openhabian/mqtt-io/config.MCP3008.yml'
os.system(cmd)

---

I can run this sucessfully from console using:
openhabian@openhabian:~ $ python3 /home/openhabian/runmqttio.py

but on starting "mqtt_io.service"

[Unit]
Description=mqtt_io
After=multi-user.target

[Service]
Type=simple
ExecStart=/usr/bin/python /home/openhabian/runmqttio.py
Restart=on-abort

[Install]
WantedBy=multi-user.target

---

i get the following:

---

openhabian@openhabian:~ $ sudo systemctl status mqtt_io.service
● mqtt_io.service - mqtt_io
Loaded: loaded (/lib/systemd/system/mqtt_io.service; enabled; vendor preset: enabled)
Active: inactive (dead) since Sun 2022-10-23 16:20:54 CEST; 3s ago
Process: 6875 ExecStart=/usr/bin/python /home/openhabian/runmqttio.py (code=exited, status=0/SUCCESS)
Main PID: 6875 (code=exited, status=0/SUCCESS)
CPU: 139ms

Oct 23 16:20:54 openhabian systemd[1]: Started mqtt_io.
Oct 23 16:20:54 openhabian python[6877]: /usr/bin/python3: No module named mqtt_io
Oct 23 16:20:54 openhabian systemd[1]: mqtt_io.service: Succeeded.

---

although the service starts mqtt_io is not running

I have replaced the runmqttio.py with another simple "hello_world" bit of script and that works fine!

any help much appreciated.
Matt

Config

mqtt:
  host: 192.168.0.6
  port: 1883
  user: ""
  password: ""
  topic_prefix: battery

gpio_modules:
  - name: rpi
    module: raspberrypi 

sensor_modules:
  - name: mcp3008
    module: mcp3008

digital_inputs:
  - name: test
    module: rpi
    pin: 1

sensor_inputs:
  - name: analog0
    module: mcp3008
    interval: 10
    channel: 0

  - name: analog1
    module: mcp3008
    interval: 10
    channel: 1

  - name: analog2
    module: mcp3008
    interval: 10
    channel: 2

  - name: analog3
    module: mcp3008
    interval: 10
    channel: 3

  - name: analog4
    module: mcp3008
    interval: 10
    channel: 4

  - name: analog5
    module: mcp3008
    interval: 10
    channel: 5

  - name: analog6
    module: mcp3008
    interval: 10
    channel: 6

  - name: analog7
    module: mcp3008
    interval: 10
    channel: 7

Hardware

• Raspberry Pi,

System:

• OS: Openhabian]
• Python version: Python 3.9.2
• User you're running as: openhabian
• Using a virtualenv?: no

[ondras12345]

My guess would by that you have installed mqtt-io using pip as a regular user, but your service is running as root. (Don't try to fix this by running pip with sudo, that is not recommended.)
This is my systemd unit file (I have installed mqtt-io in a python venv in /opt/mqttio):

sudo tee /etc/systemd/system/mqttio.service << EOF
[Unit]
Description=MQTT IO
Requires=mosquitto.service
After=mosquitto.service

[Service]
User=homeassistant
ExecStart=/opt/mqttio/bin/python3 -m mqtt_io /etc/mqttio.yml
RestartSec=30
Restart=on-failure
SyslogIdentifier=mqttio

[Install]
WantedBy=multi-user.target
EOF

The important line is User=homeassistant (the user I want to run the program as).

[mattb1908]

Brilliant, thank you so much, added line User=openhabian and its up and running.