OTAA, and connecting to IFTTT

I see in best practices that a device should join the network as few times as possible. How do i keep the “DevAddr”, and reuse it after a reboot? (Edit: using a LoPy)

I’m also having trouble getting the received data to IFTTT. I’ve set up IFTTT Maker, and copied the key to the corresponding field in Integrations. For “Value 1” I’ve choosen “data”, my decoded data looks like this:

{
“data”: 1
}

On IFTTT I see my applet has never run. What’s am I missing here?

Edit: IFTTT is working, the correct event name wasn’t entered. Only question is then how to avoid doing OTAA on every boot