"Oh wow, that was the problem. I had TX -> TX and RX -> RX. I switched them and now it's working fine. Thanks so much!"

"I have it wired up exactly as described to my Pixhawk telemetry 2 port (I checked the pinout for the pixhawk telemetry port to make sure it was right). When I power it up the Teensy just blinks orange slowly. The only telemetry value I get on my…"