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Here's the chinese document with the pin out.



From the website:
"1 Product description
XN297 is a short distance transceiver chip, using GFSK modulation. Chip integrated RF transceiver channels, GFSK modem and digital
data link. Users only need to send / receive channels for simple setup, you can communicate. In Auto Transceive mode, the chip can root
automatically determine the data according to the response information delivery / reception was successful, so retransmission, packet loss, continue to send and wait for the other operations, with simplified
user program.
2 Recommended Operating Conditions
 Power supply voltage: 3.3V
Ø Working temperature: -40 ℃ ~ 85 ℃"

Ok Looked again for the JXD 395, it's a XN297 which is compatible nRF24L01 ....

EDIT ... Below XN297, the second number is : 345 ....

So it"s confirmed should be this chip also for the CX-10.

victzh wrote: Why do you think it's nRF24L01+ ? It looks like it, but the letters 345 are in the wrong direction.

Could you clean it with alcohol and make another photo?

In theory, the pins with fan-out (bottom side) are the ones, but the rightmost pin is not visible enough and it's unclear how to connect to it. The photo of the back would help.

I take what I said back... taking a macro shot now.

victzh wrote: Why do you think it's nRF24L01+ ? It looks like it, but the letters 345 are in the wrong direction.

Could you clean it with alcohol and make another photo?

In theory, the pins with fan-out (bottom side) are the ones, but the rightmost pin is not visible enough and it's unclear how to connect to it. The photo of the back would help.

Because, on the quad (on the JXD 395 at lease), there is a Beken 2423 ...
So I guess it's nRF24L01 compatible chip

Why do you think it's nRF24L01+ ? It looks like it, but the letters 345 are in the wrong direction.

Could you clean it with alcohol and make another photo?

In theory, the pins with fan-out (bottom side) are the ones, but the rightmost pin is not visible enough and it's unclear how to connect to it. The photo of the back would help.

I don't think it's impossible. Looks easy to me.

Daryoon wrote: Maybe if you can tell us exactly where to put the logic analyzer probes...

someone with the skill to solder can grab a log.

It will be almost impossinle to solder on these pins (without specific material). You need 5 probes : GND, MOSI, MISO, TCK and CSN.

You can find these pins on the nRF24L01+ datasheet.
The best think to try first is to check if these pins are not linked with pins of the main MCU of the TX. On this one, soldering job will be easier

Maybe if you can tell us exactly where to put the logic analyzer probes...

someone with the skill to solder can grab a log.

kamueone wrote: The new green Board on the Cheerson cx-10 uses the same protocol as the JD 395.

Is there a way to use that protocol with a devo 7e?



Thank you for your help,

Actually, none of the Gurus here (PB, Victzh, Hexfet, etc...) have such models. I have the JXD 395, but to collect the SPI it's very hard coz the RF chip is directly soldered on the TX board. I will try to see if associated SPI pins are derivated somewhere else on the TX MCU for example.

The new green Board on the Cheerson cx-10 uses the same protocol as the JD 395.

Is there a way to use that protocol with a devo 7e?



Thank you for your help,

Hello,

The new green Board on the Cheerson cx-10 uses the same protocol as the JD 395.

Is there a way to use it with a devo 7e?



Thank you for your help,

ABE compagny .... smell it will be compatible with the Sky Walkr protocol.
The same compagny actually are making the RF part for the last JXD quads (389, 390, 391, 393). The Sky Wlkr protocol is also compatible with the Cheerson CX-10 and CX-11 (probably the CX-30 too).

For the Sky Walkr protocol, the flipping channel is not (yet) working. I can sniff SPI log for identifying it if HexFet is reading this message

victzh wrote: It's probably a clone of V272, did you try V202 protocol on it? I have V272, it flies OK.

Yes I tried all nRF24L01 associated protocols without success....
For the CX-10 and CX-11, it's using the Sky Wlkr protocol (good news)

I will capture SPI log asap

(((((((((((((MODEL15))))))))))))
.

name=SCX10.420
mixermode=Advanced
icon=SCX-10~1.BMP
type=plane
[radio]
protocol=DEVO
num_channels=9
tx_power=100mW

[protocol_opts]
Telemetry=Off

[channel1]
safetysw=RUD DR1
template=complex
[mixer]
src=ELE
dest=Ch1
switch=FMODE1
curvetype=9point
points=-75,-55,-35,-20,0,20,35,55,75
[mixer]
src=ELE
dest=Ch1
switch=FMODE0
usetrim=0
curvetype=9point
points=-50,-40,-25,-15,0,15,25,40,50
[mixer]
src=ELE
dest=Ch1
switch=FMODE2
usetrim=0
curvetype=9point
points=-100,-75,-50,-25,0,25,50,75,100

[channel2]
template=complex
[mixer]
src=AIL
dest=Ch2
usetrim=0
curvetype=expo
points=0,0

[channel3]
safetysw=GEAR0
template=complex
[mixer]
src=THR
dest=Ch3
switch=GEAR1
curvetype=expo
points=-100,-40

[channel4]
reverse=1
speed=168
template=complex
[mixer]
src=RUD
dest=Ch4
curvetype=expo
points=-15,15
[mixer]
src=AIL
dest=Ch4
switch=AIL DR1
usetrim=0
curvetype=expo
points=0,0

[channel5]
failsafe=-100
template=complex
[mixer]
src=AUX4
dest=Ch5
usetrim=0
curvetype=expo
points=0,0

[channel6]
failsafe=-100
template=complex
[mixer]
src=AUX5
dest=Ch6
usetrim=0
curvetype=expo
points=0,0

[channel7]
template=complex
[mixer]
src=ELE DR1
dest=Ch7
switch=ELE DR1
usetrim=0
curvetype=deadband
points=0,0

[channel8]
template=complex
[mixer]
src=MIX1
dest=Ch8
switch=MIX1
usetrim=0
curvetype=deadband
points=0,-1
[mixer]
src=AIL
dest=Ch8
usetrim=0
curvetype=expo
points=0,0

[channel9]
template=simple

[trim1]
src=LEFT_V
pos=TRIMLV+
neg=TRIMLV-
step=10
[trim2]
src=RIGHT_V
pos=TRIMRV+
neg=TRIMRV-
[trim3]
src=LEFT_H
pos=TRIMLH+
neg=TRIMLH-
[trim4]
src=RIGHT_H
pos=TRIMRH+
neg=TRIMRH-
step=10
value=2,0,0
[timer1]
type=countdown
src=ELE DR1
resetsrc=AIL DR1
time=600
[timer2]
type=permanent
src=ELE DR1
val=11300
[datalog]
switch=None
rate=1 sec
[safety]
[gui-128x64]
V-trim=59,10,1
H-trim=5,59,3
V-trim=65,10,2
H-trim=74,59,4
Small-box=2,22,Ch3
Small-box=2,31,Timer1
Model=75,20
TxPower=102,7
Battery=102,1
Toggle=42,10,72,0,0,None
quickpage1=Telemetry monitor

here it is