Mosquitto Support in DEV


 
C

CParrott

New member
I had some time to play around with the mosquitto_pub in the latest dev. Had some issues with rc.local running before WIFI was up (and thinking it was an issue with rc.local but it wasnt) so I made this script. Maybe it will help someone.

start_mosquitto_pub.sh:
Code: 
#!/bin/sh

MQTT_HOST=192.168.0.123
MQTT_PORT=1883
MQTT_USER="somemosquittouser"
MQTT_PWD="somemosquittopassword"
MQTT_CLIENT="heatermeter"
MQTT_TOPIC="heatermeter/hmstatus"

#TESTING...
#echo "HOST:     " $MQTT_HOST
#echo "PORT:     " $MQTT_PORT
#echo "USER:     " $MQTT_USER
#echo "PASSWORD: " $MQTT_PWD
#echo "CLIENT:   " $MQTT_CLIENT
#echo "TOPIC:    " $MQTT_TOPIC

#Wait for ping return of the MQTT server before trying to connect
while ! ping -c 1 -W 1 $MQTT_HOST; do
    sleep 1
done

#Connect to MQTT and publish HeaterMeter data...
/usr/bin/lmclient @LMSS,1 | /usr/bin/mosquitto_pub -h $MQTT_HOST -p $MQTT_PORT -u $MQTT_USER -P $MQTT_PWD -i $MQTT_CLIENT -t $MQTT_TOPIC -l

Seems to work the few times I have rebooted the HeaterMeter. Id like to add something to have it try to reconnect if there's an error in mosquitto_pub or it disconnects. May be best to make an init.d script but I dont know how to do this yet.

If I get anywhere with NodeRed flow I'll post it here if anyone is interested.

EDIT: Added '/root/start_mosquitto_pub.sh' to /etc/rc.local before the 'exit 0' BTW...
 
Last edited:
I'm interested. I'm working on converting a lot of my smart devices to MQTT control to help with HA/NodeRed integration. I'll give this a shot next time I have my HM hooked up.
Thank you for the work.
 
CParrott said:
EDIT: Added '/root/start_mosquitto_pub.sh' to /etc/rc.local before the 'exit 0' BTW...
Click to expand...
Looks good except you'll want to add a & to the end of the command in rc.local. The script blocks so system startup never completes, which means it also won't reboot if you ask. It should be:
Code: 
/root/start_mosquitto_pub.sh &
exit 0

I'd also recommend against putting the script in /root, since that is blasted away when the firmware is upgraded. /mnt/mmcblk0p4 is used for archives, so putting the script there will persist it across firmware upgrades. /etc/rc.local is already persisted by the system backup operation that takes place before an upgrade.
 
Thanks for the help! I have made the changes you suggested and it is working great!

Code: 
/mnt/mmcblk0p4/start_mosquitto_pub.sh &

exit 0

I appriciate the project and all the work that went into it! Sorry to stumble my way through Linux 101 on here...
 
CParrott said:
Sorry to stumble my way through Linux 101 on here...
Click to expand...
No worries, you're doing great! Ideally this should all be done through the webui but I just haven't had time to properly integrate it and just wanted to have something that was usable as quickly as possible. Making it user friendly comes a little later.
 
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