Add more than two extra RF modules to 7E

7E only support two extra RF modules at PA13 (TMS) and PA14 (TCK). I want a third extra module installed.

From the hardware connection list I found that PA4 and PB4 are not in use. Though not as convenient as to use exiting TMS and TCK, for people have enough skills, they can still solder a wire from the pin of the chip.

Is there anyone have tried to use these two GPIO pins?

There is a good discussion about this in the thread called "3in1 / 4in1 RF module". To use the 3-in-1 you need to do exactly this. There are a couple of good choices for pins.

Hello,
I have added 3 Modules to the 7e, it works.
I used the Pictures from the 3in1 install and soldered the 3rd Module to the Cpu Pin.
The Info on Banggod with Pictures show the Cpu Pin and the Number for the ini.
It works with cc2500,7105,24l05 here on my Tx.

I use it with 3 internal Antennas , they are glued in front of the Switches internal.
There is a bit Place for it ( it is a pcb Antenna )
Greetings Alex

I use 3 modules in my devo 7e works fine, the third module I connected the CSN line to B3 pin direct at the CPU and added B3 in the ini file.
www.deviationtx.com/forum/7-development/...odule?start=80#44118

Others have connected the third module to A13, pin on the ARM.
Up to you

Thank you all for the info.