Dennis Mulhair Posted April 18, 2020 Share Posted April 18, 2020 Thanks Chris, Can you please let us know the name of the new thread when you post so I can bookmark it. Many Thanks Dennis Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted April 18, 2020 Author Share Posted April 18, 2020 Hi Dennis. Sorry, my fault I meant to do just that. The thread is called 1S Wattmeter Quote Link to comment Share on other sites More sharing options...
David Wilkinson Posted June 27, 2020 Share Posted June 27, 2020 Hi Chris, Seems like I'm very late to the party. Just started with Arduinos a few weeks ago, and am building a vario sensor based on the OpenXSensor page. Do you have any of the PCB boards left? Don't worry if not. Was there anything in the magazine article that you've not covered here. I've tried to get hold of a back issue, but there doens't seem to be any available. Many thanks. David Quote Link to comment Share on other sites More sharing options...
Tim Kearsley Posted June 27, 2020 Share Posted June 27, 2020 Posted by David perry 1 on 18/04/2020 09:21:25: I might well be up for this but need to see the full article first. Ta David G4YVM (anynother callsigns here?) Very late seeing this, but yes David, I lurk here also! Tim (G4WFT) Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted June 27, 2020 Author Share Posted June 27, 2020 Posted by David Wilkinson on 27/06/2020 13:29:28: Hi Chris, Seems like I'm very late to the party. Just started with Arduinos a few weeks ago, and am building a vario sensor based on the OpenXSensor page. Do you have any of the PCB boards left? Don't worry if not. Was there anything in the magazine article that you've not covered here. I've tried to get hold of a back issue, but there doens't seem to be any available. Many thanks. David Hi David Yes I'm sure I have PCBs still. Certainly the fully functioning but incorrectly printed ones. Almost certainly some correct ones too. If I can dig out the mag I could photocopy the article and include that as well. Quote Link to comment Share on other sites More sharing options...
Andy Halmshaw Posted June 28, 2020 Share Posted June 28, 2020 Hi David, I took copies of the magazine articles and have them in PDF format if you are interested. Let me know your email address and I can email them to you. Andy Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted April 13, 2021 Author Share Posted April 13, 2021 Resurrecting an old thread, I have a question for other sensor builders and an update on the openXsensor software. 1). Has anyone has success with any openXsensor based telemetry with FrSky Archer / Access receivers? I'm really struggling with one unit working (but sometimes not) and 4 others that don't work at all. 2). I've downloaded the latest version of openXsensor, to find that it now includes a 'configurator' program that really simplifies the setting up. If you're still interested then this looks well worth investigating. Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted April 13, 2021 Share Posted April 13, 2021 (edited) Chris, I can't see that the sensors are handled any differently on Access receivers, I've got a couple of SR6 and 8s running Access with Neuron escs and lipo sensors. It's a while since I set them up but I'm pretty sure that they hooked straight up with no issues. I'll see if I can find the log files and take a shufty to be sure. edit - I don't appear to have any logs to hand, sorry! I'm pretty sure that I checked they were working, otherwise I'd have had low voltage warnings screaming away when I set them up! Edited April 13, 2021 by Bob Cotsford Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted April 13, 2021 Author Share Posted April 13, 2021 Thanks Bob. I have an FrSky S.Port 150A current sensor plugged in and that was discovered straight away. So the S.Port on the Rx is working fine. It's just the homebrew ones that are an issue at present. Prob best if I ask on their own forum. Quote Link to comment Share on other sites More sharing options...
Slope445 Posted May 27, 2021 Share Posted May 27, 2021 I just happened to run across this forum. I’ve always been interested in onboard sensors. I’ve used the Spectrum vario in my sailplanes and it works. I built my own airspeed sensor a few years ago using a pressure sensor chip, an op amp and a bar graph. Then I did an onboard video recording of the readings. You can see a video and photos on RCgroups. Just search my user name “Slope445” Quote Link to comment Share on other sites More sharing options...
Mike Blandford Posted May 27, 2021 Share Posted May 27, 2021 On 13/04/2021 at 18:13, Chris Bott - Moderator said: Resurrecting an old thread, I have a question for other sensor builders and an update on the openXsensor software. 1). Has anyone has success with any openXsensor based telemetry with FrSky Archer / Access receivers? I'm really struggling with one unit working (but sometimes not) and 4 others that don't work at all. 2). I've downloaded the latest version of openXsensor, to find that it now includes a 'configurator' program that really simplifies the setting up. If you're still interested then this looks well worth investigating. You may be having trouble with the voltage levels out from the Rx. I had trouble with a D8 receiver running my D16 firmware. The high logic level voltage was not high enough for the openXsensor to see as a logic '1'. FrSky SPort devices use a transistor buffer/inverter, so only need to see around 1 volt. I did a change to the openXsensor code that allows the Arduino analog comparator to be used for the SPort input. This recognises anything over 1.3V as a logic high. You would need to compile the openXsensor code with the appropriate pin selected as the SPort signal (IO7 I think), and re-wire the hardware so the SPort signal goes there. This makes the openXsensor more compatible with the SPort hardware. Mike 1 Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted May 28, 2021 Author Share Posted May 28, 2021 Many thanks Mike. Its suddenly quite low on my priority list but this gives me something to look at when I get back to it. Quote Link to comment Share on other sites More sharing options...
Brian Dorricott 1 Posted November 17, 2021 Share Posted November 17, 2021 (edited) Sorry about the lateness but just decided to make some GPS sensors to work with Frsky X receivers and noticed this thread . I believe there an article in 2019 RCM&E with an article that might start me off , can someone confirm for me the month or a photocopy if not available ? I have managed to read GPS data to arduino uno and run the Frsky Sensor to test whether the data is read by TX16S telemetry ( it was) just now need to hook them together but not sure where to start. If i had got into this back then I would have had some of the sensor boards but probably way to late for that . There is sketch from googling that says it does GPS to Frsky telemetry but i could not compile at all and too thick to work out why . Was looking for location, height ,speed from the GPS and maybe some pack info such as current ( worked out volts easily enough) . Hoping someone can help . Edited November 17, 2021 by Brian Dorricott 1 Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted November 18, 2021 Author Share Posted November 18, 2021 Hi Brian. The article was published in the May 2019 edition. Note: I've sent you a PM too. Chris Quote Link to comment Share on other sites More sharing options...
Andy J Posted November 24, 2021 Share Posted November 24, 2021 Has anyone designed a stall warning sensor as sure this would be of interest to many? Often thought the simple flaping blade contact type found on many light aircraft wing leading edge's would be simple to emulate. Quote Link to comment Share on other sites More sharing options...
Brian Dorricott 1 Posted December 1, 2021 Share Posted December 1, 2021 Hi all Thanks Chris B for pointer to original magazine article that's all up and running on breadboard except the current sensor seems to out of stock everywhere but I have tested the port with a varying voltage and it will work but need calibrating . Anyone got a spare ASC758LCB they could sell ( RS out of stock ) ? Using the configurator I built the GPS version to log location, height and speed again on breadboard to the RM TX16S SD card and that all worked really well all I need now is something to plot the .csv log onto as i'm not keen on Google Earth which works but is a faff , preferably free alternative to Google that I can plot the flight path on ? For those interested in technical aspects I built the GPS and voltage/current circuits on Arduino Nanos with a Neo 6M for the GPS ( only 4 wires and a resistor) and for the voltage/current/pressure with a BMP180 and the voltage resistors on Veroboard . When its all tested and calibrated I will heat shrink it for protection . If anyone is interested I can email .ino file and a connection instruction but it is all in the description .h file for OpenXsensor anyway . For those interested in this topic there is a nice standalone circuit using an Arduino that writes to an SD card instead for those who don't have telemetry on there radio gear . I think for larger models the CAA may demand some form of logging soon but lets see. Quote Link to comment Share on other sites More sharing options...
Brian Dorricott 1 Posted January 7, 2022 Share Posted January 7, 2022 Sorry to ask again but has anyone got a spare hall effect sensor for this project as they seem unavailable everywhere ACS758 LCB-50u or 100u . Alternatively is there a substitute that could be used ? Bit stuck now for the current sensor Banggood do something but they are all -100b or 50b bi-directional ones that dont measure down very low . heres hoping someone has a spare in the bits box . Cheers Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted January 8, 2022 Author Share Posted January 8, 2022 I think a bi-directional one would do, Brian? If memory serves me correctly, you'd just need to set the offset voltage to suit, probably to half supply volts? A quick eBay search found this in the UK (and plenty offered from China). https://www.ebay.co.uk/itm/CJMCU-CJMCU-758-ACS758LCB-050B-PFF-T-Linear-Current-Sensor-Hall-Current-Module-/163353797118?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=710-127635-2958-0 Quote Link to comment Share on other sites More sharing options...
Brian Dorricott 1 Posted January 9, 2022 Share Posted January 9, 2022 I googled until blue in the face and that didn't come up , would prefer -u but can live with -b adjust as necessary. Thanks Quote Link to comment Share on other sites More sharing options...
Phil Green Posted January 9, 2022 Share Posted January 9, 2022 (edited) If you're quick, RS have a (very) few ACS758ECB-200U in stock. These days you have to adapt to whats available ? https://uk.rs-online.com/web/p/motion-sensor-ics/7248739 (ignore their 'motion sensor' mistake) The advantage of RS is that you know you're getting genuine manufacturer parts, not knock-off clones! Edited January 9, 2022 by Phil Green Quote Link to comment Share on other sites More sharing options...
Mike Blandford Posted February 15, 2023 Share Posted February 15, 2023 I've just discovered that the openXsensor firmware has some errors in it when sending FrSky SPort data. 1. Altitude and vertical speed are transmitted as fast as possible where there should some rate limit such as only every 100mS or 200mS. 2. Sensor items that are polled but don't have any new data should reply with a packet of all zero bytes, but they actually respond with the first byte not zero, so equivalent to always sending data. The combination of these two problems is an openXsensor can request the Rx to send more data than the radio link can handle, particularly for receivers such as the G-RX6 and G-RX8 that also have internal sensors that send data. This will result in loss of data so some sensors may not be able to return data very often. Mike Quote Link to comment Share on other sites More sharing options...
Mike Blandford Posted February 15, 2023 Share Posted February 15, 2023 The second problem is fixed by a small change to the code that was committed on Feb 25, 2022, file oXs_out_frsky.cpp. Starting at line 1745, change: } else { TxSportData[0] = 0x10 ; TxSportData[1] = 0 ; into } else { TxSportData[0] = 0 ; TxSportData[1] = 0 ; Mike Quote Link to comment Share on other sites More sharing options...
Mike Blandford Posted February 27, 2023 Share Posted February 27, 2023 Is anyone using an openXsensor who would like it to work with FrSky FPort or FBUS? I've just got one working with FPort1. Mike Quote Link to comment Share on other sites More sharing options...
ChrisOhara Posted April 19, 2023 Share Posted April 19, 2023 On 27/02/2023 at 16:34, Mike Blandford said: Is anyone using an openXsensor who would like it to work with FrSky FPort or FBUS? I've just got one working with FPort1. Mike Hello Mike Ar you working with the Rasberry or arduino version ? https://github.com/mstrens/oXs_on_RP2040 Chris Quote Link to comment Share on other sites More sharing options...
Mike Blandford Posted April 19, 2023 Share Posted April 19, 2023 I'm looking at the Arduino version but I talked to "mstrens" and he has added FBUS to the Rasberry version. Mike 1 Quote Link to comment Share on other sites More sharing options...
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