Graupner SJ Hott SUMD protocol

[Plüschi]

First try to add Graupner SJ Hott SUMD serial protocol. Inspired by code from ernieift.
Sumd HD must be enabled in the transmitter telemetry settings, and the last receiver channel must be connected to the serial input of the FC.

Works with my 6-channel MX12. Can someone test this with 8 channels?

[Plüschi]

So the interest in Graupner serial protocol is ... ZERO ?

[State]

Hey Plüschi,
i have a 8ch HoTT receiver/sender. Didn't find much useful information about this SUMD HD thing ... what does it do?

[Plüschi]

The Graupner SUMD is a serial protocol like Speksat and Sbus. Its not PPM-Sum, its better. It is a fully digital loss-free serial communication (ppm-sum is analog in time domain). The data from your Transmitter stick goes to your servo with 100% accuracy, zero jitter, zero error. This is the future of RC.

Advantages of SUMD over
- Sbus. Sumd needs no inverter.
- Speksat. Sumd allows 2 receiver redundancy. (And i think hott is much better then any variant of dsm)
- PpmSum. Sumd gives full resolution and zero jitter, PpmSum has only 250 steps and always 4ms jitter (filtered away in MWii).

If you want test i can provide a build. The more people bug Alex about the better.

[State]

Ok got it ... very nice Less cable chaos is always good.

I'll test it the next days. Already applied your diff.

[cGiesen]

One additional important reason for SumD.
The two very small and cheap Rx only speak SumD!

http://www.graupner.de/de/products/65b0 ... oduct.aspx
http://www.graupner.de/de/products/65b0 ... oduct.aspx

[State]

Works for me.

Set receiver to SUMD HD 08 (whats that number for? amount of channels transmitted over SUMD?)

Connected channel 8 from the receiver to RX1 of the board.

Needed to enable

Code: Select all

#define SERIAL_SUM_PPM         PITCH,YAW,THROTTLE,ROLL,AUX1,AUX2,AUX3,AUX4,8,9,10,11

to get the right channel order.

MultiWiiConf GUI shows that all 8 channels are working.

As my post count says ... i'm new to all this ... didn't even know that there was an option to use SUMO

[Plüschi]

Needed to enable

Code: Select all

#define SERIAL_SUM_PPM         PITCH,YAW,THROTTLE,ROLL,AUX1,AUX2,AUX3,AUX4,8,9,10,11

Good hint. Thanks

I do actually copy only 8 channels, but its easy to change to 12.

[arminius]

Hi guys. I hope you can help me with this.

I have a graupner mx20 HOTT and bought an Align GH3 gimbal.
Now I realised that the ports to control the gimbal are sbus and satelite.
In the gimbal software I can select Graupner SUMD as well but I have no clue how to connect this and do I need another receiver to control the copter or is there a second receiver just for the gimbal?

I googled graupner sumd and came across this forum.

This sounds to me the right thing you were talking about.

Thanks a lot

arminius

[TheBum]

You should be able to use a Y-adapter on the SUMD output of the receiver to run the SUMD signal to both places. Communication is only one way and, fortunately, the right way to allow this.