Hi CaptainJake,
Thanks for the details. Before we look at re-pairing anything, let’s rule out the radio antenna itself, this is a common cause of a sensor going offline shortly after a radio card install.
When the SRF319H card was installed, could you check whether the white flexible antenna wire is routed cleanly, not bunched up, folded, or pinched between the board and the backplate? If it’s compressed or kinked, that alone can cause this pattern, connects fine at first, then drops and won’t reconnect.
Here’s a guide on proper antenna routing:
If you find it’s pinched, reseating it along the routing channel should resolve this. Let us know what you find.
Thanks,
Alfred@Surety