Hi there! I've been lurking and learning for a while, but here goes my first post!
I have Raspberry Pi that is the heart of my home automation/monitoring. I am trying to hook up a Arduino pro mini with a RFM69HW strapped onto it, and power it all via the Pi's 3.3v pin.
The radio works reasonably well when I do not set High Power mode, but from my reading of this forum it seems not setting High Power mode can cause other problems with communications. I'm wondering if my MANY missed ACKs are the result of this...
However, when I set High Power mode, the Arduino browns out and resets when it attempts to send a packet. It seems the 3.3v from the Pi can't support the burst current needed by the HW amplifiers.
Can I solve this problem with a capacitor? If so, how large of a capacitor would I need?
If not, I have a separate 3.3v supply I could use to power the Arduino board and radio. Would that fry anything or cause any other problems - to have the Pi powered off one supply, connected to the Arduino via UART, which is powered by another supply?
Thanks in advance (and thanks Felix for the awesome library!)