Pair new Popp radiator valve with new Aeotec gen 5 stick (solved) Topic is solved

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Just for users that run into the same problem as I did. Fresh out of the box the Aeotec z-wave was recognized by Domoticz (2020.1 on pi), but the Popp valve (also fresh out of the box) just couldn't be paired. Resetting the valve didn't help, however resetting the stick and removing and then add it back to Domoticz did the trick. For resetting the stick, use a sharp needle like object and press the reset button for around 20 seconds. The led of the stick starts blinking red, increasing in frequency and the procedure is finished when the led turns blue