openrcforums

At these altitudes (of around 350m and more) it's hard to guess the real altitude of a model. And it's an altitude, where an uplift may be rather strong. So I would like to have that alarm limit to tell me, I have to go down immediately to stay in a safe (visible) range. (My electric gliders are rea...

Camboui wrote: Instead of a resistor, a 15-20mA constant current switching regulator would be neat

But don't forget, that the effectivity of a switching regulator is not 100%.
You may loose what you gain.


Reinhard

The 'custom' altitude alarm is currently settable from 0 to 1020 (3346 ft) metres in steps of 4 metres (13ft). Is this actually too high for an alarm? Would 0-255 m (0-835 ft), in steps of 1 m (3ft) be better? Mike. 255 m as maximum altitude is to low, for me. I normally get up higher with my elect...

It's probably some kind of constant current source.
Current will be the same independent of the load. So voltage goes up (with several LEDs in series) to hold the current at the same level.

Reinhard

I always fly gliders (up to 2m) with the 3 channel receivers. I didn't have problems with them up to now. And I have quite a bunch of the 3 channel receivers. Even though I did not recognize dropouts, I know, that they are there, from time to time, probably with higher distance and direction of ante...

Here is a picture that should help
http://www.rcgroups.com/forums/attachme ... id=3933786

Reinhard

Your picture doesn't look like a shorted antenna contact. Even without any antenna, the receiver should have a connection range of some ten meters. So it looks like something different is wrong. Does the tx work, when you use a different rf module (from the other tx) ? Can you check, if the supply v...

Now learning the exact sequence things have to be done in, it's very specific. Reading (and writing) data may happen tomorrow, spent several hours on it today. Mike. I found that there is a sd library available on the Arduino.cc pages. http://arduino.cc/en/Reference/SD Maybe it could help you someh...

Why not try the Bosch BMP085 air pressure sensor that is even smaller (5 x 5 x 1.2 mm) ?
http://www.bosch-sensortec.com/content/ ... l/3477.htm

Reinhard

Pure GPS NMEA data report Altitudes in the $GPGGA record in meters: Field 9: Antenna altitude above/below mean-sea level (geoid) Field 10: Units of antenna altitude, meters Field 11: Geoidal separation, the difference between the WGS-84 earth ellipsoid and maen-sea-level (geoid) Field 12:Units of ge...

I don't trust the GPS altitude. After I zero it, after a few seconds it'll go to -5, zero it again and after a few seconds it goes to -5 again. It should be dead nuts on but it doesn't seem to be. On the other screen where it's in meters it starts at 30 M there abouts but I'm only about 10 feet abo...

My simple open9x splash screen and as xbm file

Thanks for the tips, I found the QT4 package for python2.7 and installed it. It still didn't run. Did not find 'python' Found that the system path variable had the path added to '...Python27\lib\site-packages\PyQt4' but not to '..\Python27;' Added the path to the variable and now it's working :idea:...

tried it in the util directory to get the message:
File "img2lbm.py", line 4 in <module>
from PyQt4 import Qt,QtGui
ImportError: No module named PyQt4

Where do I get it from ?

Reinhard

As stated, I'm on windows. I reinstalled the downloaded installer with all available options. How do I see, that I have the graphics libraries? Messagefrom compile: Convert font from xbm to lbm: python ../util/img2lbm.py s9xsplash.xbm s9xsplash.lbm img process_begin: CreateProcess(NULL, python ../ut...

I can not compile splash screens

I'm running XpSP2
Splash screens on ER9X are compiled, as they run with a Ruby script.
Open9X, as far as I understand, needs Python.

Which version? Tried with 2.7.3 but that did not work.
Is there anything else missing that needs to be installed?

Reinhard

Next question:

Are there any splash screens with open9x?

I didn't find any

And is there some more help (besides the discussions) about what open9x does and how to use it ?

I'm just trying this firmware and I'm a little bit lost.

Reinhard

Open9x can display 2 x 8 channels on the bars and on the numeric display.

But there is no indication of which set of 8 channels are shown.

Could we get some text on the screen, that states which channels are displayed?


Reinhard

Attachments went wrong.
both of them now in this post

Reinhard

I also have made an Arduino version to get telemetry data onto the radio. As I made the NMEA version of ER9X that doesn't use the FrSky hardware, my solution is a little bit different. For the NMEA version look at the wiki. I use the 'normal' NMEA hardware (module of a GPS mouse and two APC200 trans...

As it is different between bind mode and normal mode, the module seems to correctly switch between these two modes.
So it looks like it is not able to interpret and transmit the ppm stream.
That makes me believe the failure is within the rf module.


Reinhard

Did you check the bind switch that is not permanently activated, holding the TX in bind mode ? My last idea. http://static.rcgroups.net/forums/attachments/1/4/4/1/6/1/a3827753-203-033.jpg below the right big IC there are two solder pads. There was an LED soldered in the earlier versions. This LED is...

As the tx can bind with a receiver, the rf part basically must be working. (Binding is done without an external signal). Signal amplitude to low or to high could be a problem. Probably it should not be to high, so only a to low signal could be the reason. Can you verify, that the 1k resistor is real...

Software. You probably have flashed the FrSky version of the firmware. This requires, that you do the FrSky mod on the tx board. This physically reroutes the aileron and the throttle signal to two, up to that time unused pins, to free up the pins that are used to communicate with the FrSky module Re...

..... up to the RF module.

only up to the module or really within the module, thru the bind button plate up to the final rf module board ?


Reinhard

- 4.08 V on the RF module power pin (Tx side). The value was slightly moving: 4.08-4.09 This would confirm the continuity of wires... ???? Don't know which points you really mean, but shouldn't they be the same? The module has to get the full battery voltage, as the voltage regulator is built into ...

I'm sorry to break in another time. And this is my personal point of view. This discussion looks like it is degenerating to a thesis for doctorate, where the value of a contribution is measured in the number of words put into every single sentence and the unintelligibility for a normal reader. It's ...

You rf module does not get the ppm signal. it got lost on the way to the module.

You are sure it's a 1 k and not something much higher?

Reinhard

Agreed; I'll look further into eliminating the cause of the problem, being that trim is added to the computed stick position, thereby offsetting all input values, rather than being treated as an offset to its calibrated neutral position, having its effect linearly scaled through its range, tapering...

if you have a gps module attached to the FrSky-Hub:
On setup screen 'Telemetry' (9/11) select:
UsrProto = FrHub

On setup screen 'Telemetry2' (10/11) select:
GpsAltMain = ON

The altitude, displayed on the 'RPM' screen will now be set from the GPS altitude and not from e.g. HowHigh


Reinhard