Help needed for wiring for a Matek H743-WLITE to Holybro telemetry radio

Hardware Radios
1

Evening all.

Please bear with me as I’m new to all this. I have recently purchased the Holybro telemetry radio and I’m trying to wire it up to a Matek H743-WLITE but not sure where the 6 wire goes. The holybro unit has a GND, RTS, CTS, TX, RX AND 5V while the flight controller has a seried of pinouts that include RTS7, CTS7 etc.

Can someone put in simple terms for a simpleton like me and say “attach CTS from Holybro to CTS7 flight controller” for each cable (and anything else you think I might need to know) as I’m at a bit of a loss.

I’ve heard these things can draw a bit of current so is it worth powering these things from a source that is not the FC and (you guess it) how.

Last question, does it matter which radio goes in the aircraft and which goes the PC/missionplanner?

Sorry for the annoying questions.

Happy Christmas everyone.

2

The TX and RX are “crossed”
TX of one → RX of the other
RX of one → TX of the other

The CTS and RTS are “straight through”
CTS → CTS
RTS → RTS

GND to GND obviously…

The 5v can come from an external “BEC” which is the term for a Battery Eliminator Circuit (or power supply in old fashioned terms). So you’d need a BEC for 5v 1amp at least - preferably 3amps since you might be able to use it for other things. The BEC must be able to handles your battery voltage input.
For example, not all BECs can handle a 6 cell Lipo battery.
The GND of the BEC must be connected to the flight controller and radio GND so they are all common.

1 Like
3

Wonderful, thank you very much.