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May 25, 2019, 04:16 AM
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Arduino not reading Spektrum 4648 receiver.


Has anyone connected an Arduino up to a Spektrum 4648 DSMX Serial Receiver with Diversity? I know it's been done with the old spectrum sat receivers but can't find any info on the protocol used by these new receivers.

I don't need to read any telemetry just the rc signals from channel 1 to 6.

I'm using the YMFC32 projects receiver code at the moment and it doesn't appear to read the receiver. It works with a PPM encoder connected to my Futaba channel order receiver, but doesn't work with the spectrum receiver.

Attached is the YMFC32 set up program that can read a Futaba PPM receiver that has only one signal pin wire. It reads all zeros if I connect up the Spektrum receiver. Basically I would like to put a Flip32 FC into my Horizon Hobby V22 but still use the Spektrum 4648 receiver that came with it.
Last edited by RCvertt; May 25, 2019 at 04:32 AM.
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May 25, 2019, 04:42 AM
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Spektrum sat rx use no PPM but have a serial output, afaik.
Don't ask me about baudrate and the data coming out there, but i've seen UART pins connected to it.
May 25, 2019, 01:13 PM
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I see. The YMFC32 doesn't support UART so it sounds like I'm stuck. I was hoping it would be a simple channel order thing so I could keep my Spektrum gear but it sounds like I'll have to sell it off after all. Thanks for the info.
May 25, 2019, 03:21 PM
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I'd settle for a serial to PPM encoder if one exists? A DIY one would be even nicer.

///Edit- Just found that I have a 617Xl satellite receiver that outputs CPPM. Will edit this page if it works.
Last edited by RCvertt; May 25, 2019 at 05:47 PM.


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