TRVZB F5 Fix: TRV Pin Extension (1...3.5mm) x 3mm

This is a set of extension pins for thermostat valves (TRVs), more specifically for Sonoff TRVZB valves.

The TRVZB valves show an F5 error after more recent firmware updates - see here: https://github.com/Koenkk/zigbee2mqtt/discussions/24518

This error can be fixed by choosing the suitable pin from the pins in this file - the pins are labeled 1…3.5 mm, indicating the added lenght for the original pin.

Pin extension snaps onto the original 3 mm pin (hole is ca. 3.7 mm deep).

In my case, a valve with RAVL adapter (provided by Sonoff with the TRVZB) caused the issue - according to the compatibility table Sonoff provides, it's either an Oventrop or Danfoss valve (these are the only valves type compatible with the RAVL adapterI use). The pins on my valve have an OD of 3 mm and the pin extension fits snuggly.

Print in PETG (or ASA/ABS) to make sure there is no heat induced deformation!