cathalferris

A quick and dirty "fix" would be to run a regular cronjob to execute a script; the script checking to see if wlan0 is present, and if not present / valid then reconnect wlan0.

Create a file called check_start_wlan.sh in root's directory ("/root/check_start_wlan.sh")

#!/bin/bash
if ! `ifconfig | awk -F: '/^wlan0:/ && $0 != "" { getline; print $0}' | awk {'print $1'} | grep inet > /dev/null` then `connmanctl connect _managed_psk`
fi

Change the "your_wlan0_connection_string" for your particular wlan0 connmanctl connection string

then as root:
crontab -e
Add this line to the end of the crontab:
*/10 * * * * /bin/bash /root/check_start_wlan.sh

make sure to add an empty line after that line, then save/exit.

Verify the crontab looks sane
crontab -l

This should every 10 minutes via cron: check the output of ifconfig, look for the line starting with "wlan0", get the next line and check if there's a valid IP address present (checking if the "inet" phrase is present), if "inet" not present then ask connmanctl to connect that connection.

Note - only tested in my head, error conditions not trapped, running scripts as root creates a theoretical security risk etc etc etc.
Happy to take suggestions/improvement (less)