ELRS chanel configuration

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jjuk
Posts: 305
Joined: Thu 05. Oct 2017 20:06:35

Since ELRS requires the sys port in 3.7.4 (spirit2), how is it possible to test channel assignment, set failsafe, etc, in the spirit application?
IFHELI
Posts: 26
Joined: Sun 21. Sep 2014 22:23:28

I ran into this tonight. I tried using a y-connection but did not work. I just plug the white wire back into rudder port and green wire at ail port to do the update and check settings. When done I moved the white and green wire back to the SYS port.
ZeXx86
Site Admin
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Joined: Mon 29. Apr 2013 16:06:44
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You can still use the old wiring for initial configuration.
Spirit System developer
Shanew06
Posts: 5
Joined: Fri 16. Jan 2026 2:52:33

ZeXx86 wrote: Thu 08. May 2025 7:05:36 You can still use the old wiring for initial configuration.
What is the "old wiring" configuration please?
Shanew06
Posts: 5
Joined: Fri 16. Jan 2026 2:52:33

IFHELI wrote: Thu 08. May 2025 1:06:08 I ran into this tonight. I tried using a y-connection but did not work. I just plug the white wire back into rudder port and green wire at ail port to do the update and check settings. When done I moved the white and green wire back to the SYS port.
I tried this and managed to get it mostly working.
One item that did not work was my Tail gain which I had set to a switch. The switch values were not being detected by the configuration software on the PC.
Did you have this problem, and could it be because the rudder port on the Spirit has the rp3-h now plugged into it?
Shanew06
Posts: 5
Joined: Fri 16. Jan 2026 2:52:33

Latest update, I moved the RP3-H green and white leads to the rud and ail ports on the spirit and was able to connect the PC lead to sys. This enabled me to configure the heli via the pc and have the tx working as well.
The channel 5 issue was because elrs defaults this to arm, so I had to change my tail gain to channel 7 from channel 5.

My current issue is that when I disconnect the PC and put the green and white wires back into sys, the spirit does not recognise any input despite their being a tx-rx connection. Leaving these wires in the rud and ail ports of the spirit works, but I can't get any esc telemetry to come through to the tx.
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