Monitoring your internet connections with OpenWRT and a Telegram Bot

For the past 5 years or so, I have been using a single ISP at home and mobile data for backup when it went down. But since last few months, the ISP service became a bit unreliable – this is more related to the rainy season. Mobile data doesn’t give fiber like constant speeds I get on the wire. It’s very annoying to browse at < 10 Mbps on mobile data when you are used to 100 Mbps on the wire.

I decided to get another fiber pipe from a local ISP. One needs to be very unlucky to have both going down at the same time – I hope that never happens. Now the question is how to monitor the two connections: Why do I need monitoring? – so that I can inform the ISP when it goes down, with the fail-over happening automatically thanks to OpenWRT’s mwan3 package, I won’t ever know when I am using which ISP (unless I am checking the public IP address, of course).

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