Spektrum DSM surface

[RobertoD91]

TX: Spektrum DX3s
RX: Spektrum SR300 and Spektrum SR3001

According to this pdf Spektrum_Surface_Receiver_Chart.pdf these receivers are only compatible with surface DSM and actually do not work with either DSMR or DSM2SFC.

#855

I will capture the spi signal asap.

[pascallanger]

Right, DSM is not supported only DSM2 and DSMR.
Let's see if you have access to the cyrf6936. You might look at the receiver side as well.

[RobertoD91]

Disassembly:

[pascallanger]

Usually there is nothing to see on the RF module pins unless you open it... Check the RX instead

[RobertoD91]

Receiver SR300:

Receiver SR3001:

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Usually there is nothing to see on the RF module pins unless you open it... Check the RX instead

But searching the fcc id we can see a CYRF6936 inside https://fcc.report/FCC-ID/BRWDAMTX11/1166223 this is not useful ?

[pascallanger]

But searching the fcc id we can see a CYRF6936 inside https://fcc.report/FCC-ID/BRWDAMTX11/1166223 this is not useful ?

Yes there is a cyrf6936 but there is also a controller on the board so the board pins are useless.
You would need to connect wires to the 5 vias within circle + gnd:

If you proceed just send dumps like you are doing with Traxxas TQ1.

The SR3001 could also be used by connecting all 8 pins of the daughter board to the logic analyzer. It uses a component that I've never worked with before. It would be harder to deal with but might be doable.

[RobertoD91]

You would need to connect wires to the 5 vias within circle + gnd:

I don't think that i can solder a cable in this small vias :(
Any suggestion?

The SR3001 could also be used by connecting all 8 pins of the daughter board to the logic analyzer. It uses a component that I've never worked with before. It would be harder to deal with but might be doable.

I tried, but I have issues with desoldering;
I don't know if this scanning will be useful.
I will try again asap.

• power on not touching anything

poweron.logicdata.zip

• power on in bind mode with a RX in bind mode

binding.logicdata.zip

• power on, CH1 mid, min, mid, max, mid

steering maybe ch1.logicdata.zip

• power on, CH2 mid, min, mid, max, mid

gas maybe ch2.logicdata.zip

[mozgy]

You would need to connect wires to the 5 vias within circle + gnd:

I don't think that i can solder a cable in this small vias :( Any suggestion?

PCBite is perfect tool here.