Search found 467 matches

by Carbo
Sun Oct 01, 2023 3:21 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: Modify OpenXVario to Sailboat
Replies: 2
Views: 4074

Re: Modify OpenXVario to Sailboat

Hi,
this is possible but not very user friendly.
viewtopic.php?t=13150
An alternative is using telemetry from a flightcontroler with iNav. An old F3 10 dof is perfectly suited and cheap - if you can get one. Newer FC work also of course.
by Carbo
Thu Jun 01, 2023 4:53 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: PX4 airspeed sensor with openX
Replies: 3
Views: 1748

Re: PX4 airspeed sensor with openX

I'm not sure if anyone tested the latest changes in the code. You can try with an older version of the code. Please find attached an older version that should work with MS4525 if you do not have one yourself. Your config files seem OK to me.

openXsensor.zip
(309.29 KiB) Downloaded 80 times
by Carbo
Thu Jun 01, 2023 9:27 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: PX4 airspeed sensor with openX
Replies: 3
Views: 1748

Re: PX4 airspeed sensor with openX

Did you try to swap the pressure connections on 4525D0? Negative airspeed data is not processed.
by Carbo
Sun Apr 03, 2022 2:46 pm
Forum: General help (FrSky Taranis radio)
Topic: Only one channel is active on X9D+ 2019 and Archer R4
Replies: 2
Views: 3221

Re: Only one channel is active on X9D+ 2019 and Archer R4

Did you check channel mapping in receiver options? FrSky has unusual defaults from time to time .....
by Carbo
Sat May 29, 2021 10:57 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New speed sensor: SDP3x
Replies: 19
Views: 14010

Re: New speed sensor: SDP3x

Please find attached an openXsensor folder. It should run with a FrSky S-Port RX and Arduino nano or pro mini. All features are disabled besides airspeed with SDP3X. Remember to add 4.7k pullup resistors to i2c lines. I decided to make my own breakout board for a better handling.
by Carbo
Thu May 27, 2021 6:14 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New speed sensor: SDP3x
Replies: 19
Views: 14010

Re: New speed sensor: SDP3x

Hi Tempo, not sure if you are still active with this project? If you are still around, do think it would be relatively straightforward to use the oXs_sdp3x.cpp code as the basis for coding a dedicated airspeed probe (using Arduino coding)? Of course I would welcome anyone else's comments on this to...
by Carbo
Tue Mar 30, 2021 9:57 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: ADC inputs for vcc measurement
Replies: 2
Views: 2651

Re: ADC inputs for vcc measurement

Here is an example how to transmit voltages measured with A3, A2, A1, A0 using the telemetry fields VFAS, Fuel, A3 and A4. There is only one VFAS slot available but you can use other fields to transmit voltages. Cells does not work because it transmits delta voltages in a packed field.
by Carbo
Sun Mar 28, 2021 10:46 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: Help reading RPM
Replies: 4
Views: 3468

Re: Help reading RPM

Try to block RF with a small ceramic capacitor between D8 and GND. TX and RX (telemetry) RF are able to disturb the measurement.
by Carbo
Sat Feb 20, 2021 12:44 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New beta version of openXsensor (=openXvario)
Replies: 541
Views: 307533

Re: New beta version of openXsensor (=openXvario)

A4 and A5 (i2c bus) is OK for both. They are differentiated by the i2c adress.
by Carbo
Tue Feb 02, 2021 7:45 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: openXsensor slimsize GPS Vario for DLG and F5J
Replies: 47
Views: 45854

Re: openXsensor slimsize GPS Vario for DLG and F5J

Hi Is there any chance to get the information what had to be changed to get it running with Telemetry Viewer? What's the different in S.port information/protocol between Standard Frsky and this version. Regards Chris Hi, here is a complete sketch, ready to flash. T1 and T2 are manipulated to simula...
by Carbo
Tue Feb 02, 2021 6:34 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New beta version of openXsensor (=openXvario)
Replies: 541
Views: 307533

Re: New beta version of openXsensor (=openXvario)

Airspeed is not foreseen in hub-protocol. It should be possible to send airspeed using other fields like T1. But it is not prepared. It is eventually much easier to flash D-RX with D16 firmware: https://www.rcgroups.com/forums/showthread.php?3391195-FrSky-D16-firmware-for-D8-receivers&perpage=20...
by Carbo
Thu Dec 31, 2020 12:50 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: OpenXSensor vario configuration
Replies: 25
Views: 13919

Re: OpenXSensor vario configuration

Your MS5611 seems to be OK since your VSpd (not compensated) is calm. Your MS4525 airspeed data seems also OK. Running the attached V4.0 firmware should result in a similar compensated VSpd with low noise (+/-0.1m/s). To crosscheck again I can flash the sketch you used in your test and report back. ...
by Carbo
Tue Dec 29, 2020 4:34 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: OpenXSensor vario configuration
Replies: 25
Views: 13919

Re: OpenXSensor vario configuration

This is a logfile with V4 I've just made. SC is switching between not compensated (1) and compensated VSpd (-1). There is +/- 0.1m/s noise in compensated mode (when airspeed is about constant) and no noise in not compensated mode. Sensitivity was 60% and compensation 110% in this case. If you test w...
by Carbo
Mon Dec 28, 2020 7:00 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: OpenXSensor vario configuration
Replies: 25
Views: 13919

Re: OpenXSensor vario configuration

You are right. I've crosschecked with the 2016 version and compensated VSpd is indeed not useable. Now I remember I was using this version for glider performance measurement only. Then I've flashed back to 4.0 and everything worked as foreseen. Seems the newer versions are missing some filtering for...
by Carbo
Thu Dec 24, 2020 2:58 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: OpenXSensor vario configuration
Replies: 25
Views: 13919

Re: OpenXSensor vario configuration

Presumably you should test an older known working version now. Please find attached a 2016 oXs sketch which should work with your configuration out of the box. 2016 there was only one config file (config.h) but you will see a similar structure.
by Carbo
Thu Dec 24, 2020 12:22 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: OpenXSensor vario configuration
Replies: 25
Views: 13919

Re: OpenXSensor vario configuration

With the sensitivity dialed down to 20, airspeed fixed at 38kts with a syringe (but still fluctuating, might indicate a problem with the sensor), compensation at 82%, vspeed jumping between -0,4 and +0,4 m/s Hmm, there is something wrong, airspeed and VSpd should be stable in your setup, even with ...
by Carbo
Thu Dec 24, 2020 10:08 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: OpenXSensor vario configuration
Replies: 25
Views: 13919

Re: OpenXSensor vario configuration

At rest, no airspeed, I get readings between zero and roughly 6. This is pretty normal. Variation decreases exponential with increasing airspeed. Imo it is better to simulate airspeed inhouse with a static pressure applied to the dynamic port of the MS4525. Vspeed should be nearly deadcalm inhouse ...
by Carbo
Wed Dec 23, 2020 1:59 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: OpenXSensor vario configuration
Replies: 25
Views: 13919

Re: OpenXSensor vario configuration

It is actually not intended that way. #define VSPEED_SOURCE FIRST_BARO selects standard VSpeed from first physical baro sensor. MS5611 in your case. #define VSPEED_SOURCE AIRSPEED_COMPENSATED selects airspeed compensated VSpeed #define VSPEED_SOURCE PPM_SELECTION allows to switch between the two VSp...
by Carbo
Wed Dec 23, 2020 6:00 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: OpenXSensor vario configuration
Replies: 25
Views: 13919

Re: OpenXSensor vario configuration

This is strange. Airspeed data should not change at all if the vario data source is changed. Please upload your config files.
by Carbo
Tue Dec 22, 2020 11:47 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: OpenXSensor vario configuration
Replies: 25
Views: 13919

Re: OpenXSensor vario configuration

What I want to look into is sending out a telemetry value with the name "compensation" and send the exact value, so I can read it on my X10S radio directly. There are two different ways imo: Activate #define FILL_TEST_2_WITH_PPM_AIRSPEED_COMPENSATION and transmit TEST_2 in a T1/T2 field a...
by Carbo
Tue Dec 22, 2020 9:25 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: OpenXSensor vario configuration
Replies: 25
Views: 13919

Re: OpenXSensor vario configuration

oXs is able to send PWM (PPM) back in a telemetry field. T1 or T2 is a good choice. With a suitable offset and ratio OpenTX should show compensation % directly. On my side I was happy with the PWM value since I adjust compensation acoustically. But you are right, it is smarter to convert it in compe...
by Carbo
Mon Dec 21, 2020 8:23 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: OpenXSensor vario configuration
Replies: 25
Views: 13919

Re: OpenXSensor vario configuration

Only these lines are needed for your purpose: #define AIRSPEED_RESET_AT_PPM 100 //send a pwm signal +100% to reset airspeed before start #define COMPENSATION_MIN_AT_PPM 60 #define COMPENSATION_MAX_AT_PPM 90 #define COMPENSATION_PPM_MIN 80 #define COMPENSATION_PPM_MAX 140 Compensation is adjusted wit...
by Carbo
Sun Nov 22, 2020 6:29 am
Forum: openTx
Topic: Glider crow brake in flight mode - tricky difficulties with camber offset
Replies: 2
Views: 2713

Re: Glider crow brake in flight mode - tricky difficulties with camber offset

123jhe wrote: Sat Nov 21, 2020 11:13 amThe expected behaviour would be: braking is starting from the camber position of the phase the glider was in before entering brake.
In order to avoid the rapid up and down, you can set the trigger point for the landing phase so that there is never an upward movement due to the switchover.
by Carbo
Tue Oct 27, 2020 1:03 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: High(er) resolution current sensor
Replies: 7
Views: 7154

Re: High(er) resolution current sensor

Hi John Yes, third board is an Arduino pro mini 328 16MHz. It is also possible to use an Arduino Nano which has USB onboard with only a little weight and size penalty. Nano is preferable for beginners if size is negligible. If you are only looking for a 100A sensor without the need of 0.02A resoluti...
by Carbo
Wed Oct 14, 2020 8:10 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145072

Re: RPM resolution?

A 100pF ceramic cap connected to (D)8 and GND solved a similar issue for me. Interference was presumably caused by RX telemetry. OpenTX filtering should not be neccessary imo.
by Carbo
Sat Sep 12, 2020 8:07 am
Forum: General help (FrSky Taranis radio)
Topic: Frsky R8 PRO receiver AIN2 port not working?
Replies: 14
Views: 12344

Re: Frsky R8 PRO receiver AIN2 port not working?

There is an (useless) A2 voltage in telemetry, but FrSky RX8Rpro have no AIN2 port at all. Where did you connect FBVS-01?
by Carbo
Wed Jun 17, 2020 8:23 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: two current sensors on one arduino
Replies: 4
Views: 3912

Re: two current sensors on one arduino

Indeed there is only one slot for current data. But a few for voltage. A workaround is to scale and transmit the voltage output of a 2nd current sensor and change unit and name in OpenTX later.
by Carbo
Wed May 20, 2020 4:31 am
Forum: openTx model setup
Topic: Using Vario Alt for rate (ascend/descend per minute) announcements
Replies: 7
Views: 8345

Re: Using Vario Alt for rate (ascend/descend per minute) announcements

I consider the following approach: - Setup a calculated sensor from the (Alt) telemetry value. A calculated value (called "Rate") of type "distance" in meters. - Setup a timer, that triggers every minute (for one second). - Setup a function on the start of that timer edge to pla...
by Carbo
Tue Apr 07, 2020 10:16 am
Forum: FRSky Horus radio
Topic: Mainboard defect in S-Port update
Replies: 4
Views: 7465

Re: Mainboard defect in S-Port update

Don't worry. It is nearly impossible to damage a iXJT in this context.

Go to advanced search