how are you rebroadcasting as a Davis ISS? Everything I've seen so far in my (admittedly) short research only mentions receiving signals from an ISS, not broadcasts. Got any recommendations as a starting point?
TIA
I posted my code on Github - I forked the excellent
VPTools as a starting point, tweaked the base class slightly and added a
RelayRxTx sketch.
I don't think git has my very latest code, but it should be functional.
It can output data in various formats to the USB port (I have mine plugged into the same Raspberry Pi I run my weather software and web page on), but I recommend you only use that feature for initial setup/debugging - writing the serial data ties up quite a lot of CPU cycles. You can set/tweak various parameters via the serial port to tune reception drift and timing etc, the values will be stored in non-volatile memory to survive power cycles of the Arduino.
I power my Motenio via the USB port, if you d this I recommend that you cut the link on the board that connects the link active line to the CPU reset, otherwise you reset the thing every time you establish a serial connection.
The Motenio is relatively expensive, but it does provide a very neat package to integrate Arduino and radio on a single board. Especially good if you are technically challenged with a soldering iron and SMD components like me.
EDIT: I see the VPTools author has added a Relay sketch to the base library now, and has been actively making updates - probably worth having a look at his code as well - it will no doubt be better structured than mine.