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nmakel / solaredge_meterproxy

Modbus proxy for SolarEdge inverters and unsupported kWh meters
MIT License
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Question: run the script on RPI in background #3

Closed Maikel-K closed 3 years ago

Maikel-K commented 3 years ago

Hi Niels,

How do you run your script? I tried running it via cron on my RPI but it fails for some reason. I also tried to make a service of it but also this fails with a key error.

Any quick hints? Otherwise I will try and investigate some more.

Maikel

PS: thanks again for all your work! I love it thus far!

nmakel commented 3 years ago

I use OpenWRT, so the most elegant way is a procd init script in /etc/init.d/.

It shouldn't be too difficult to make a systemd service. The most important thing is to make sure you use the --config parameter with the full path to the configuration file, and that the script is run as a user with sufficient privileges.

If you could paste the key error I might be able to figure out what is going on.

Maikel-K commented 3 years ago

Im not at home but via SSH this is what I'm trying to achieve now true cron:

reboot python3 /home/pi/eastronsolaredge/semp-rtu.py

But this doesn't seem to work.

Service file content:

[Unit]Description=Eastron-to-SolaredgeAfter=multi-user.target[Service]ExecStart=/usr/bin/python3 /home/pi/eastronsolaredge/semp-rtu.pyRestart=always[Install]WantedBy=multi-user.target

This is the output of the service:

eastronsolaredge.service - Eastron-to-Solaredge Loaded: loaded (/lib/systemd/system/eastronsolaredge.service; enabled; vendor preset: ena Active: failed (Result: exit-code) since Sat 2020-11-28 18:25:53 CET; 4s ago Process: 14319 ExecStart=/usr/bin/python3 /home/pi/eastronsolaredge/semp-rtu.py (code=exit Main PID: 14319 (code=exited, status=1/FAILURE)Nov 28 18:25:53 raspberrypi4 systemd[1]: eastronsolaredge.service: Service RestartSec=100ms Nov 28 18:25:53 raspberrypi4 systemd[1]: eastronsolaredge.service: Scheduled restart job, reNov 28 18:25:53 raspberrypi4 systemd[1]: Stopped Eastron-to-Solaredge.Nov 28 18:25:53 raspberrypi4 systemd[1]: eastronsolaredge.service: Start request repeated toNov 28 18:25:53 raspberrypi4 systemd[1]: eastronsolaredge.service: Failed with result 'exit-Nov 28 18:25:53 raspberrypi4 systemd[1]: Failed to start Eastron-to-Solaredge.~~

Maikel-K commented 3 years ago

Sorry thats a bit messy I'm not at home and looked this up via iTerminal app....

nmakel commented 3 years ago

You need to tell semp-rtu.py where your config is, either by setting a working directory in the service file, or by passing the '--config' parameter.

Maikel-K commented 3 years ago

So you mean:

ExecStart=/usr/bin/python3 /home/pi/eastronsolaredge/semp-rtu.py --config semp.conf

Or

ExecStart=/usr/bin/python3 /home/pi/eastronsolaredge/semp-rtu.py --config /Home/pi/eastronsolaredge/semp.conf

nmakel commented 3 years ago

The last one.

Maikel-K commented 3 years ago

Okay, will try that later on. Cant we fix that in de main file that it will look for it? Just a thought?

Maikel-K commented 3 years ago

So I fixed a few typos on my phone and the script seems to be called correctly with the config file loaded and now I get this, It can't load sdm_modbus

image

nmakel commented 3 years ago

The environment a script started by systemd runs in is different from that when run in a user session. You need to make sure all the dependencies are installed globally, or that the script runs as the correct user.

Maikel-K commented 3 years ago

Easy as pi (pun intended), your input an the user addition runs the service:

Here is my service file content: [Unit] Description=Eastron-to-Solaredge After=multi-user.target

[Service] Type=idle ExecStart=/usr/bin/python3 semp-rtu.py --config semp.conf WorkingDirectory=/home/pi/eastronsolaredge/ User=pi

[Install] WantedBy=multi-user.target