Support for walkera telemetry.

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16 Oct 2012 20:43 #2293 by PhracturedBlue
Replied by PhracturedBlue on topic Support for walkera telemetry.
Here is a test build with GPS support
Attachments:

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17 Oct 2012 04:01 #2296 by vlad_vy
Replied by vlad_vy on topic Support for walkera telemetry.
Ok, I will test it this evening. I havn't idea what is MMNE for except it can be - Mean Measured Noise Estimate for altitude.

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17 Oct 2012 14:25 - 17 Oct 2012 14:54 #2304 by vlad_vy
Replied by vlad_vy on topic Support for walkera telemetry.
Volt1: 5.3V
Real Voltage = 5.39V

Volt2: 3.9V (7.8V)
Real Voltage = 3.92V (7.82V)

Volt3: 3.8V (7.8V)
Real Voltage = 3.92V (7.82V)

Temp1: 24C or 33C (my fingers temp)

Temp2: 24C or 33C

Temp3: 24C or 33C

Temp4: 24C or 33C

RPM1: 6120/6240 (optical tachometer 6150rpm)
RPM2: 6480/6600 (optical tachometer 6300rpm)
RPM3: 0 ??? (only two sensors)

Long: 030 20 50.166
Lat: 059 54 46.056
Alt: 51.400m
Speed: 0.240m/s
14:00:13 2012-10-17

1) Why Volt2: 3.9V and Volt2: 3.8V are different? Real voltage is the same.
2) Sensor reading at main page doesn't changing. It changed only after visit Telemetry page and return to main page.
3) After switch off telemetry all values remains unchanged (last values).
4) Temp readings with value 'ff' will be better to replace with '00' (temp sensor disconnected) and display '0'.
Last edit: 17 Oct 2012 14:54 by vlad_vy.

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17 Oct 2012 14:52 #2305 by FDR
Replied by FDR on topic Support for walkera telemetry.

vlad_vy wrote: 1) Why Volt2: 3.9V and Volt2: 3.8V are different? Real voltage is the same.

I think that is simply caused by the differences of the inputs.
The voltage inputs are probably heavily divided to meet the input voltage specification of the ADC, and the resistors are not precise enough, I guess...

2) Sensor reading at main page doesn't changing. It changed only after visit Telemetry page and return to main page.

Yep, I've already mentioned that...

3) After switch off telemetry all values remains unchanged (last values).

Wrote about that too, but if you think about it, those values can be useful, but the GUI should sign, that they are obsolete, for example with a red background, like the run-down timer...
I would left them on the main page too, within a red box.

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17 Oct 2012 14:54 #2306 by FDR
Replied by FDR on topic Support for walkera telemetry.
...and one more thing about the main page telemetry boxes: I would jump to the telemetry page on click, or at least on a long click.

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17 Oct 2012 15:09 #2310 by PhracturedBlue
Replied by PhracturedBlue on topic Support for walkera telemetry.
The telemetry stuff still has a long way to go.
I still need to:
a) add a way to configure display (ft vs m, C vs F)
b) Configure limits for the alarm (for both critical values)
c) detect LOS (and alarm on it)
d) Quick access to the telemetry data
e) Enable a logging capability to track telemetry (and probably source/channel info) to save status to a log file to be viewed on the PC later
But I'm glad that we've got the protocol now.

I'll continue working on trying to finish the capabilities. I'm certainly interested in any insight as to the right way to interact with the telemetry. is GPS of much value without logging? is there any reason to show it on the main page? or is it more of a 'I crashed, where'd my model go' type of thing?

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17 Oct 2012 15:32 - 17 Oct 2012 15:38 #2311 by Eriskio
Replied by Eriskio on topic Support for walkera telemetry.
Well, with helis GPS has no significance at all, and used telemetry data could be restricted to Tension/Voltage of LiPo batteries (as I currently do with external Quanum unit. But the Walkera telemetry is not able to report single cell voltage, so Quanum solution is way better for me).

But some kind of "long flying"/"gliders addicted" friends told me these concept about the use of telemetry on planes:
1) last GPS position could be useful to be shown on the mainscreen in case of problem (you can check instantly if the model is gone out of sight if it is always moving, in which direction). In this case it can be useful to "hold" the last value received on screen (saved also on flash during shutdown?) so that if I turn on the radio again after a crash (and after having walked toward the supposed impact zone), I can instantly get model position (wrech maybe! and google maps and GPS phone needs).
2) All telemetry data should be logged for later analysis. It is really useful to track down not only absolute position but voltage, current and temperature (and any other data that telemetry transmit) to be able to analyze flight in deep (problem prevention / pilot skill improvement). Otherwise all these data are not really usable in real time (you have to pilot your model at first) except for specific (audible) alarm purposes (like a sound on low voltage, motor/ESC temperature too high, etc).
But less than 4 mega of free space on flash, can be enough to store all them?
Last edit: 17 Oct 2012 15:38 by Eriskio.

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17 Oct 2012 17:10 - 17 Oct 2012 17:21 #2313 by Andrey
Replied by Andrey on topic Support for walkera telemetry.

PhracturedBlue wrote: Here is a test build with GPS support

I'am tested:
V1,V2,V3, T1,T2,T3,T4, RPM2 Long, Lat, Alt, Time - all OK
Long, Lat, Alt +- 10...20ΠΌ

Is there any reason to show it on the main page?

I would like to see on the main page:
Speed
Alt (Real value = Alt - Starting Alt)
RPM
DateTime (Value + GMT)

and alarm by V1,V2,V3, T1,T2,T3,T4

P.S. I would also like to keep the total flight time model (not reset by pushing the "EXT" and be able to enter the starting value)
Last edit: 17 Oct 2012 17:21 by Andrey.

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17 Oct 2012 17:49 - 17 Oct 2012 17:51 #2314 by vlad_vy
Replied by vlad_vy on topic Support for walkera telemetry.
+1 for 'Integrated Timer'

Integrated Timer (INTEGRATE TIMER) HH:MM (always shown at main page)
The Integrated Time is recorded individually for each model. When this time exceeds 100 hours, the time will return to zero. This can be used as a reference for maintenance of each aircraft. This time can also be reset to zero - set the cursor on the Integrated timer at Timer page and press the dial to reset.

Andrey, why you need set start time for Integrated Timer?
Last edit: 17 Oct 2012 17:51 by vlad_vy.

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17 Oct 2012 17:58 #2315 by PhracturedBlue
Replied by PhracturedBlue on topic Support for walkera telemetry.
your definition of 'integrated time' has no relevance to telemetry as far as I can tell.
I can accurately enough keep track of total time without any of this knowledge, though I'm not sure how you can accurately figure out maintenance intervals from this. Or do you intend to only count time when telemetry is being received? or maybe throttle is active?
Anyhow, it should be clear by now I don't have sufficient info about the needs to implement such a thing at this point.

If you ave a request, file an enhancement request on bitbucket with as much info as you possibly can put into it.

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17 Oct 2012 18:18 - 17 Oct 2012 18:21 #2316 by Andrey
Replied by Andrey on topic Support for walkera telemetry.
It has no relation to the telemetry, the total flight time must be considered on a timer. Summirvat time when the throttle channel is not 0 (preferably able to enter the throttle channel number manually). Opportunity to enter an initial value just will not be superfluous (replacement firmware / transmitter, etc.) do not need to write a user interface for this - just to be able to change the value in modelX.ini
Last edit: 17 Oct 2012 18:21 by Andrey.

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17 Oct 2012 18:40 - 17 Oct 2012 18:42 #2317 by Andrey
Replied by Andrey on topic Support for walkera telemetry.
Exampl code :-)

After load modelX.ini
if TimerX.Type = "stopwatch" then begin
Load TotalTime from modelX.ini
end

Before power off or before change modelX.ini
if TimerX.Type = "stopwatch" then begin
Save TotalTime to old modelX.ini
end
Last edit: 17 Oct 2012 18:42 by Andrey.

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17 Oct 2012 18:59 #2319 by FDR
Replied by FDR on topic Support for walkera telemetry.
The problem of the total timer is when it should run.

One option is to cummulate a total timer for each timer (whether they are stopwatch or countdown types) when they are running. They probably are configured to run while throttle is on.

Other option would be a third timer type: the "cummulated", which could be tied to a switch too, and would have a reset button on the config page.

But neither options would know, if there is a heli plugged in: that's where the telemetry can come handy! If you configure it's switch to a RPM, then you can count the real spinning time. Of course it supposes, that a telemetry data can be used as an input... ;)

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17 Oct 2012 19:11 - 17 Oct 2012 19:21 #2320 by Andrey
Replied by Andrey on topic Support for walkera telemetry.
It is not necessary to bind this option to telemetry, This cummulated timer is interesting for all models, and telemetry not installed on all.

The problem of the total timer is when it should run.

Only is THR channel not 0
That would avoid the problem of processing power down enough to write a new value at each stop cummulated timer

if "cummulated timer" stop then begin
save new value to modelX.ini
end
Last edit: 17 Oct 2012 19:21 by Andrey.

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17 Oct 2012 19:43 - 17 Oct 2012 19:44 #2321 by FDR
Replied by FDR on topic Support for walkera telemetry.

Andrey wrote:

The problem of the total timer is when it should run.

Only is THR channel not 0


Yep, but what if I'm just trying my settings on the monitor page without actually flying the model?

Telemetry data as a switch would be only an option...
Last edit: 17 Oct 2012 19:44 by FDR.

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17 Oct 2012 20:39 #2322 by Andrey
Replied by Andrey on topic Support for walkera telemetry.

FDR wrote:

Andrey wrote:

The problem of the total timer is when it should run.

Only is THR channel not 0


Yep, but what if I'm just trying my settings on the monitor page without actually flying the model?

Telemetry data as a switch would be only an option...

This is "the best" :-)
I offered the most simple implementation

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18 Oct 2012 04:17 - 18 Oct 2012 04:23 #2323 by vlad_vy
Replied by vlad_vy on topic Support for walkera telemetry.
Sorry for my offtopic.

1) At any case telemetry info almost unusable in time of flight.
2) Possibility to display selected sensors at 1-2 boxes at Main Page is quite enought.
3) Will be usefull to have telemetry alarms.
4) Will be nice to have logging capability.
5) Will be nice to have quick access to full telemetry information. For example, by short pressing 'Ent' button for switching between Main Page - Telemetry1 (Volt1,2,3, Temp1,2,3,4, RPM1,2) - Telemetry2(GPS Info), telemetry pages with big fonts for better readability.
Last edit: 18 Oct 2012 04:23 by vlad_vy.

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22 Oct 2012 17:29 - 22 Oct 2012 17:30 #2380 by Andrey
Replied by Andrey on topic Support for walkera telemetry.

PhracturedBlue wrote: Here is a test build with GPS support

Total flight time on this firmware for more than 2 hours. All OK.
Last edit: 22 Oct 2012 17:30 by Andrey.

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18 Jul 2013 18:48 - 22 Jul 2013 06:28 #12323 by dobosatti
Replied by dobosatti on topic Support for walkera telemetry.
I bought a devo telemetry module and installed it in a Walkera V450D03 heli. Temperature sensors and voltage measurement is perfect. It does not measure the RPM. When I turn on the radio and bind, temperature, and voltage windows are white, but the RPM window is red. When you go to the telemetry section, and return to the main window, I have a white window at RPM, but the rotation will not be measured. What is the problem, there may be some trick? I tried both module plug connectors with the sensor, but nothing. Even the telemetry window does not show anything, but they are both white box and reads zero.
This module is included:
walkerahelicoptersupply.com/products/ufo...-telemetrywk-ctl01-d
And this is the RPM sensor:
www.ebay.com/itm/RPM-Sensor-for-Telemetr...&hash=item3a829e5d96
Last edit: 22 Jul 2013 06:28 by FDR. Reason: language

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22 Jul 2013 06:29 #12413 by FDR
Replied by FDR on topic Support for walkera telemetry.
Is there anybody with a working devo RPM sensor?

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