On the your tbs crossfire nano you have the ch1 tx pad connect to. Green wire from the vtx tx to channel 3 on the crossfire nano.

Tbs Whitenoisefpv Unify Crossfire Nano Mounting Board
Tbs crossfire nano wiring diagram. White wire from the vtx rx to channel 4 on the crossfire nano. Channel 2 goes to the tx uart on the flight controller. Crossfire nano with tbs unify pro32 nano. 2 0 1 8 1 2 0 5 quickstart guide th e cr o ssf i r e di ve r s i t y na n o r x i s t h e tb s cr o ssf i r e di ve r s i t y 8 c h r x i n a n a n o p a c k a ge. How to wire tbs crossfire nano transmitter to a flight controller. Updated diagram to use uart3 instead of uart1 wire the crossfire nano to the flycolor x tower the connector highlighted in yellow below as follows tbs crossfire nano flycolor x tower.
The 7 wires from the tbs unify pro 32 nano are as followed. Tbs crossfire diversity nano rx l a s t r e v. In the example below we are using uart1. In todays video we will quickly run through wiring installation and programming of your tbs crossfire nano rx. Yellow wire the video source for your vtx usually on the flight controller sometimes a direct feed to. Icantfly january 10 2019.
Quick start guide tbs crossfire nano rx revision 2018 02 16 th e cr o ssf i r e na n o r x h a s m u c h o f t h e s a m e f e a t u r e s e t a s t h e tb s cr o ssf i r e mi c r o r x b u t o n a s m a l l e r f o r m f a c t o r a n d wi t h o u t c o n n e c t o r s. Crossfire crossfire nano setup tbs tutorial. Channel 1 goes to the rx uart on the flight controller. Which is tx which is rx. The mamba wiring diagram shown assumes youre not using one of the crossfire receivers that supports a direct crsf protocol connection in which case that is when you would need to wire smartaudio the crsf rx1 connection from the unify pro32 directly to a uart on the fc. There are tons of videos that drag on and on about this receiver but if you want.