How to wire T-Motor F7 and Spektrum SRXL2

[Michael Gauthier]

I have a T-Motor F7 55a Pro II stack and a Spektrum SPM9747 SRXL2 receiver. I can't find a wiring diagram for how to connect these two together.
The SRXL2 receiver has 4 pins, Ground and 3.3v but I don't know what the other two wires are nor where to connect them on the F7.

 

[Michael Gauthier]

If the SRXL2 receiver doesn't work, what about the Lemon DSM2 compatible receiver.

Where does that signal wire connect on the T-Motor F7?

 

[holtneil]

Signal wire goes to Rx2
I found this it may help

T-Motor F7 Pro Full Function 30x30 Flight Controller with Wifi & Bluetooth - Flight Controllers - T-MOTOR The Safer Propulsion System

T-MOTOR is devoted to being the guiding star in UAV industry with “the Safer Propulsion System”. Technological innovation, win-win cooperation, integrity and service make T-MOTOR a reliable partner for drone manufacturer and distributors for long-term co

uav-en.tmotor.com

t motor F7 manual - Bing video

www.bing.com

 

[Michael Gauthier]

No luck so far.

No matter what I do, I can’t get the receiver working in Betaflight. It is bound to the transmitter and the built-in LED does light up indicating a connection when the transmitter is turned on.

Some instructions/people say hook up the signal wire to Tx others say Rx, I have tried both with no success. The uart to use also varies depending on who you ask, so I have chosen T1/R1.

Any help will be appreciated!

RECEIVER:

I am using the Spektrum SPM9747 RSLX2 receiver. It works from 3v-8v. This is the wiring as I understand it, but I’m not sure. I also don’t know what baud rate to use, so I tried all of the Betaflight rates.



WIRING:



BETAFLIGHT SETTINGS:

PORTS:

RECEIVER SETTINGS:

CLI SETTINGS:
feature -RSSI_ADC
feature RX_SERIAL
feature TELEMETRY
map TAER1234
set rssi_channel = 0
set serialrx_provider = SRXL2
set serialrx_inverted = OFF
set srxl2_unit_id = 1
set srxl2_baud_fast = ON

 

[holtneil]

I have never used beta flight , spektrum have a good customer help desk give them a shout they should be able to help