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Modem/Router Watchdog Software
The software/firmware for the Modem Watchdog. The zip includes a .uf2 file that can be copied directly to the Pico W plus the BASIC source code, which can be loaded onto a Pico W that's programmed with the WebMite firmware.
After loading the firmware, you still need to connect to the Pico W with a terminal program to set the WiFI credentials. Refer to the article for details on how to do that.
Update 28/11/2023: the software is now V3 and constructors are advised to upgrade. Changes are to the BASIC code only, so you can re-upload it. This fixes two bugs, one which caused a reboot if NTP fails regardless of the other checks, and another which might have prevented the relay from switching at all. V3.1 features a revised .uf2 file that should load more reliably.
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Modem Watchdog PCB (10111231)
The PCB for the Modem/Router Watchdog.
Double-sided PCB with plated through holes, blue solder mask and silkscreen overlay.
51 x 42mm.
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Modem Watchdog PCB pattern (PDF download) [10111231]
A PDF with the PCB pattern for the Modem/Router Watchdog.
It's a double-sided design and both layers are in a single PDF.
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Modem/Router Watchdog kit
A basically complete kit for the Modem/ Watchdog. It includes everything you need to build the Watchdog, assuming the rectified supply voltage is close to 12V DC.
If your voltage is significantly different from that, you might need to substitute the relay or add a resistor.
The Raspberry Pi Pico W is included but is not programmed; you can program itself using a computer, the free software downloaded from our website and a suitable USB cable.
Note: the photo shows the assembled kit.
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