Shelly 1PM BUTTON TYPPE MONENTARY Giving error

Hello.

First of all, thanks for this forum. I'm a shelly beginner.

I'm trying the use shelly 1 PM within a Shelly Button, to control my towel heater.

1st of all, I'm trying to use shelly 1PM without the shelly button, but with an external button. Everything went smooth , except the case:

1- i'm able to switch ON/off using the app

2- If I switch off/on using the app, then, to swicth using the external button, on the towel heater, i need to commute the button 2 times... So i was thinking if i shall use the OPTION in the app, BUTTON TYPE=MOMENTARY....But if i select this option, shell y app give always the error "Failed to Change the button state"

What i'm doing wrongly ?

Zitat

You have to set the setting for OWER ON DEFAULT MODE to ON / OFF or restore last mode - do not stay with SWITCH

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Thanks. It is already working.