JXD 506 (Potentially JJRC H28WH)

JXD 506 is a gigantic variant of JXD 510. It features altitude hold as well as camera up/down via the transmitter (throttle trim buttons). I am able to bind it using V202 protocol. Light (ch5), Photo (ch7) and Video (ch8) are found to work. I am unable to take off after attempting some WLtoys' common operations on the sticks.

The stock transmitter uses a start/stop button to start the motors. I can then apply throttle to take off and centre throttle to maintain height. Pressing start/stop button again will make the quad to descend but motors will not stop completely. Pressing another emergency button will shut down the motors fastly and quad can finally land.

I have made 2 captures here . Capture starts after binding is completed.
1) press throttle trim+ to make camera move up and trim- to make camera move down
2) start button, throttle up, throttle centre, start button again, emergency stop button

Appreciate any help on this quad, thank you.

I also got another quad JJRC H28WH which has similar features as the JRX 506. After some quick testing, It seems that both models use the same protocol and the stock transmitters can be swapped. There are only some minor differences in the button mappings.

Results for H28WH: ch5, 7, 8 are working using Devo 10. Needs specific buttons on stock transmitter to start and stop the motors which is same as JXD 506.

Out of curiosity I tested another quad i8H by YiZhan. All 3 stock transmitters seem to be exchangeable, i8H does not feature camera movement and the throttle trims are real though. i8H uses both-sticks-down-and-outward as emergency stop and this also works on both the JXD and JJRC.

goebish wrote: Try this test build for Devo 10:
www.dropbox.com/s/winiiisla5vbs1x/deviat...0.0-9e1e225.zip?dl=0

It has a JXD-506 format option for V202 protocol.

Channel 10: arm / disarm (has to be toggled)
Channel 11: emergency stop (maybe it should be modified to just work as with stock TX ? let me know ...)
Channel 12: gimbal control, low = down, center = neutral, high = up

Please report

Unfortunately I still cannot arm the quad.
What is the expected toggled values for channel 10? 100/0 or 100/-100?
What is the expected idle value and enabled value for channel 11? 0 and 100 respectively?

Good to know I did not made a wrong test. I actually have tried different toggle values before asking. I am a newbie in RC and just started using deviation 2 weeks ago. This is also my first time using a radio with mixer functions. A lot of trials and a lot of fun too.

goebish wrote: Ok, I notice another difference in the format of the packet (no wonder it doesn't work as it is as the "arm" bit is misplaced), I'll post another test build later, going to the pub now
expected toggle is -100/100/-100

I also tested ch12 and the camera did not move at -100, 0 and 100.
ch11 could not be tested since I couldn't arm the quad, thanks.

goebish wrote: Test build for Devo 10 updated:
www.dropbox.com/s/w3bb9ic1rrbn84g/deviat...0.0-9e1e225.zip?dl=0
Please try again

Good news. The new build works for ch10 to ch12. It works for JXD-506 as well as JJRC H28WH and Yizhan i8h (no camera gimbal).

The stock transmitters have the throttle stick always centred, I have to centre the Devo 10 throttle before arming the quad otherwise disarm will happen almost immediately. This is a bit tricky. The older V202 models, e.g. Yizhan Tarantula x6 or WLToys Q212, allows a few seconds for you to centre the throttle after arming. For the above new models, you need to centre the throttle before arming.

The response of the camera gimbal is a bit sluggish. There is a delay before it starts moving. However this is the same for the stock transmitters.

Thanks again Goebish and have a great weekend.

Whilst the last test build works on all the models, the RTH has been taken out due to limited channels.
Is it possible to create another subformat, say, H28WH, to put back RTH by swapping out the Emergency Stop?

Another suggestion is to modify existing JXD506 subformat since the Emergency Stop can also be activated by both sticks down and upward.

I let you choose to keep only 1 subformat or create a new one, thank you.

Yes JXD-506 also has RTH feature.

Uploaded. One is at low rate and another one in full rate.