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Old 09-12-2020, 07:17 AM   #1 (permalink)
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Default EX Bus or SBUS directly from internal header?

Anyone know of a way to get EX Bus or SBUS directly from an internal header on the motherboard of a Jeti radio?


Would it be technically possible to enable this in firmware to use the internal PPM port, or the 3.5mm jack?
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Old 09-12-2020, 08:01 AM   #2 (permalink)
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Nope from the RX
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Old 09-12-2020, 08:29 AM   #3 (permalink)
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Ok, I gotta ask, why would you want that?

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Old 09-12-2020, 08:48 AM   #4 (permalink)
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Super obvious. Mount your battery bump to your radio instead of the heli 😉

Of course I could be wrong...
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Old 09-12-2020, 08:53 AM   #5 (permalink)
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Quote:
Originally Posted by myxiplx View Post
Ok, I gotta ask, why would you want that?

Sent from my SM-G970F using Tapatalk

I want to get a serial output from the radio that I can feed into a multi protocol module, to avoid using PPM.

Weíve got the red internal expansion ports, some of which are called serial COM, I wonder if they are useable. Iíve sent an email directly to Jeti.
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Old 09-12-2020, 09:15 AM   #6 (permalink)
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So I’ve seen a couple of things that aren’t really what you’re looking for:

The PPM channel expander, plugs into the internal PPM port and adds additional input signals to the transmitter. Needed for accessories like the stick end pots.

https://www.espritmodel.com/jeti-tra...-6-inputs.aspx

The second thing is using a Jeti Rx to connect to a multiprotocol module. It’s as simple as it sounds. In a separate box, you put a power supply, Jeti Rx and a Multiprotocol module. The transmitter then connects to the Rx as usual and relays the signal to the multiprotocol module that forwards the signal on to the aircraft receiver. There’s a how-to somewhere.
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Old 09-12-2020, 09:53 AM   #7 (permalink)
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Quote:
Originally Posted by JimJW View Post
So Iíve seen a couple of things that arenít really what youíre looking for:

The PPM channel expander, plugs into the internal PPM port and adds additional input signals to the transmitter. Needed for accessories like the stick end pots.

https://www.espritmodel.com/jeti-tra...-6-inputs.aspx

The second thing is using a Jeti Rx to connect to a multiprotocol module. Itís as simple as it sounds. In a separate box, you put a power supply, Jeti Rx and a Multiprotocol module. The transmitter then connects to the Rx as usual and relays the signal to the multiprotocol module that forwards the signal on to the aircraft receiver. Thereís a how-to somewhere.

I've already made a bridge box type thing, using a REX3 and a multiprotocol module.



However, I'm wanting to avoid PPM altogether. Hence why I'm keen on a serial output directly from the transmitter
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Old 09-13-2020, 07:14 AM   #8 (permalink)
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Got it, no PPM.

Quote:
Originally Posted by nickthenorse View Post
Anyone know of a way to get EX Bus or SBUS directly from an internal header on the motherboard of a Jeti radio?


Would it be technically possible to enable this in firmware to use the internal PPM port, or the 3.5mm jack?
I think to answer your question, yes it’s possible. But I’m not sure about convincing Jeti to write it. So maybe the question becomes, is there an existing signal going between the cpu and the transmitter radio that can be used?

I’m not sure of the answer to that question. My guess is that the data stream between the two is a digital signal. Bidirectional because of the telemetry. I have no clue what format the data is in. You could try reverse engineering it by looking up the chips used for the Jeti radio transmitter. Not a easy task.
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