Lora32u4 II - OTAA

Hey peeps,

I’m looking at making a few nodes using BSFrance Lora32u4 II’s but I am a little unsure how people are successfully using these long-term/at scale on TTN. They seem pretty good in the v1.3 incantation, plug’n’play really.

Specifically OTAA best practice is devices should perform join operations the less possible in their lifetime but these devices have no flash on-board. I guess I can tack some I2C flash pretty easily but…isn’t this a bit of a feature gap? Are these boards not really targeting LORAWAN (TTN)?

What have other people done to get around this, apart from the obvious of storing in RAM and sleeping to keep the credentials as long as possible?