Hey guys. I have this setup in my Turnigy 9x
I want to use telemetry, i was woundering what receiver would be best out of this one, and the one here
http://www.hobbyking.com/hobbyking/store/__1435 6__FrSky_D8R_II_PLUS_2_4Ghz_8CH_Receiver_with_Teleme tery.html
And i will get this screen,
Pl ease tell me what you think and what is required to get telemetry going. I new to telemetry and i am trying to monitor range and battery.
Also i am currently running the APM 2.5 board with 433MHz telemetry, this shouldnt be a problem.
Sorry for the long post!
D8R_II_PLUS_2_4Ghz_8CH_Receiver is needed for two way telemetry. You will get the display but you will also need the sensor hub and the sensors that you need to watch. Hope that helped you, best answer will be consindered a thanks :)
To check Rx and Tx signal, You won't need any sensor: RSSI is a built in option in the "D" series receivers (codes: D8R-II and D8R-XP)
You just need a compatible transmitter (DJT, sold just in combo with two different receiver) and a display (code: FLD-02 ), or an "all in one" solution: Transmitter and display all togheter (code: DHT-U).
You'll also have the receiver's voltage indication without any sensor.
For other flight's informations You'll need only sensors (battery voltage's sensor, new altitude's sensors) and for other again, You'll need also sensor HUB (old altitude's sensor, GPS, temperature, RPM, Fuel, AMP, etc.).
we have a telemetry-modul dht 8ch DIY and several D8R-XP receivers in different airplanes and helicopters. Everytime, when we will fly another model, i have to put into new values for A2. or i have to deactivate the voltage-monitoring when flying nitro heli. Why are these parameters not saved on the receiver or automatically detected ?
Please help with fast answer. Great Thanks.
So if I understand well, if I want RSSI, I just short circuit the signal pins of ch3 and ch4. I am then left with channels 5 to 8 available, channel 5 becoming channel 1 (throttle) to channel 8 rudder?
OK< thanks David. So once I short the 3-4 signal pin, the remaining "classic" servo connection (5-8) become inactive and I must use the CPPM on signal 1 to manage my servos. Question : how do I do that? I can't find any CPPM hub on the Frsky website, besides the one for Futaba's S-Hub. And even that only has 4 output...
Exactly. The 'How' is kind of a problem if you want to connect the servos directly to the receiver. You'll need a (C)PPM to PWM Converter. to get your channels back. But I can't help you with that, sorry!
You need a controller with CPPM input (as some OSD with autopilot have) that will provide to separate the 8 channels from the single CPPM input.
You need it if You use these systems and You want a single wire connection.
Otherwise, You can only use this receiver as a normal one, reading RSSI signal only inside FLD-02 display or inside DHT-U Tx.
RSSI dedicated output channel will be available in the "X" series receivers, soon on the market, but compatible only with the future "X" series transmitter (as FrSky Taranis, for example).
One question... can the telemetry be dissabled? or its alerts?
I intend to use this for FPV (using booster) due to its PPM output (i use Ikarus OSD wich uses a PPM in for managing all controls)..Obviously i dont need the telemetry as i have OSD... but i have been told that there is alarms when it goes beyond the telemetry range... can i dissable the alerts or telemetry?
Does the 2 way telemetry affects range compared to other non-telemetry Rx?
A nice easy one to answer the D8RSP is really only seven channel as channel 8 is cppm out so for example you could connect it to the ezosd and have it displaying rssi in your glasses or screen which ever you where using hope that helps Dave
dps-dave. I hope you realize that CPPM and RSSI is not the same thing and is not on Channel 8. You need to get a filter to really convert the pulses of RSSI to analogue so that the OSD can use it. It's normally the LED on the receiver that you need to solder a wire to and buffer it and then feed it to the RSSI input of the EZOSD.
Here is an example with the same EZOSD: www.link what I mean?
Lets put it , in a simpler way so every body can understand since i have both system .If you module is Telemetry ,will with above and also most other non telemetry .But if your module is non telemetry will not work with this receiver .Look on the back of your module, if it,s telemetry got two buttons
one for binding and range test,and another one that has two tinny switches ,that makes the mode for the module ,telemetry or non telem...
The diff between this and the cheaper dr8 - 11 tel rx is this has a CPPM port.
CPPM is basicly 8 channles running through the one port for example if you are using a RVOSD for fpv you can connect the one CPPM port to the osd and then all servos will connect to the OSD. thus removing the need for so many wires from the RX to OSD.
That's true, but can I upgrade the firmware of my D8R-II to D8RSP? Or I have to buy this receiver to get CPPM?
Someone told me I just upgrade using the Frsky USB adapter and it should be okay. Is this true?
your partially correct, you can upgrade the D9R-II rx to have cppm but you will need the frsky lite adapter AND the usb cable to upgrade the rx the firmware for cppm for the D8R-II is on the frsky website under downloads and then the D8R-II section
I've read you need to do a physical soldering mod to the D8R-II to get RSSI out to the OSD- are you saying this RX (the D8RSP does need updating and will not need any further soldering mods etc to get RSSI info to my FPV OSD? thanks for the reply
its cppm 8 channels go through one servo wire but u need some thing like rvosd or ArduPilot to then send to each servo. i dont understand how the telemetry works on this receiver appart from rssi and signal strength.
im not sure if this will connect to the frsky hub
thanks Grego- I'm about to get RVOSD- so can you confirm then I can get 8 channels working with the D4FR with RVOSD and RSSI output to the OSD at the same time without any further updates, without any soldering and without needing any extra components/equipment to get it to work? So D4FR is better for FPV flying- even when I need 6 channels - aileron, throttle, rudder, elevator, pan, tilt on camera, OSD ontrol plus RSSI out or can I do that with this D8RSP as well (also without soldering, updating, extra components)?
Hi, from what I understand, you still need an extra channel to control the toggle the menu and controls of the RVOSD. I think that makes it 7 channels altogether. Not sure, but correct me if I'm wrong.
I'm confused because through emailing FrSky they have confirmed this RX will definitely output RSSI to the OSD- yet customers below say they are having trouble getting RSSI info out to RVOSD (my chosen OSD)- I don't know what is true now- I already have the DR8-II but am just looking for a RX that will get RSSI out to my OD in its 'stock' format without any further complications.. i wouldn't want to get this if I end up in teh same position as I am with the DR8-II.. is there any Frsky RX that will definitely output RSSI to RVOSD without any further mods, soldering, updates nor third party component purchases?
You simpy plug the sensor hub into the A1 on the side and then add which ever sensors you wish and then i plug a cable direct from channel 8 to my ezosd hope that helps if i get chance i will post some pics up for you but i'm not 100pcnt sure what you are wanting it to do ?
Sorry but you dn't answer my question: this Rx has 3 telemetry connectors* 2 are for analog sensors and 1 is digital and have to be connected to the hub.Which type of sensor can be directly connected to A1 or A2 without using a hub?
You can use frsky battery sensor, or any other that can be drived with 3 volts since it is the output voltage from the receiver. Once i connect a lm35 as a temperature sensor but lm35 needs 5 volts, so reading was poor however the receiver send the data to the module.
Can I just upgrade my D8R-II to D8R-SP using the USB cable? Do I need the lite adapter as well?
I need CPPM to channel 8 so I can use with my RVOSD5 and autopilot. Is CPPM on ch8 really necessary?
Also, is it true that I can just connect this directly to my OSD with no buffer?
Can anyone help me here? Thanks!!!!
No it isn't that simple as the S8R SP is slightly different on the inside so you would have to modify your unit which there is a thread paul did on fpv uk org but with the earlier model D8R . The lite adaptor was only for updating the software which you don't need to do as the D8R II has the most upto date software already installed
Thanks man, but I need to update the D8R-II to SP because I need the combined PPM, which D8R-II doesn't have I think. I kind of bought the wrong receiver so now I need to update it to SP. Does that mean I still need the lite adapter or just the USB cable?
I'v seen what was said on the forum and i think he was working on something specially for the Frsky stuff I may have got it wrong on the up date as a friend was saying that there is nothing different about the hardware its a software thing but i'm really not sure so sorry if i got it wrong
Are you sure about RSSI to OSD? I think that's wrong. Please tell me who said you can just connect RSSI to your OSD. Because I can't find the link to this. I have an RVOSD5, and it requires that I mod my D8R-II still in order to get RSSI.
dps-dave, youa are wrong - CPPM and RSSI are different things. The main difference between D8R-II and D8RSP is CPPM (signal at this channel includes all channels) that could be used for different things. One application is building wireless trainer solution - you plug this receiver's CPPM signal to your trainer port and your student's radio (binded to this receiver) gets wireless connection to your radio. The second application is connection to tri-(quad- e.t.c.)copter board that supports CPPM, in this case you don't need to use bunch of wires, only one servo connector is required.
-Are you sure about RSSI to OSD?
You can integrate sumPPM on ch.8 with capasitor and resistor (RC-chain). Summary voltage depends on the signal quality = like RSSI. If signal is lost simetimes, voltage on RC-chain is decreasing. Be carefull, you can burst your TX_D8R with wrong RC-chain.
This receiver does have rssi out. I spoke with frsky via e-mail and wanted to upgrade my d8r-11 and they told me to buy this one as it already has the rssi output. I did the mod to my d8r-11 for rssi and it works but I will be buying this one for the rssi on my other plane.
Hey Alexw, so the D8R-II features is EXACTLY the same as the D8RSP, once firmware is upgraded? Also, did you add a capacitor or resistor to buffer and allow for better RSSI reading into OSD? Or was that programmed into the D8RSP by Frsky already?
I read on rc groups on how to mod your d8r-11 receiver. you have to add a wire on one of the led's. Then I bought a buffer from Poland and there you have it RSSI. Works great. You just have to do a goggle search on frsky rssi mod, that is how I found it. I did not do any upgrade to my receiver everything is stock.
Thanks alex, but I am using the RVOSD5 and the website says it can take digital RSSI in. What the heck does that mean? Does that mean I don't need theo buffer to convert digital to analogue? The creator of the this OSD isn't clear about digital RSSI in. What OSD are you using?
Vashdao, I am using the cyclopes osd v1.5, it is a great unit. I have no idea what digital rssi is or how it works. You could always go on the rcgroups forums, they have a lot of information on rssi there.
Guys just to put a stop to all the will it or wont it please click on the file tab and i have posted a picture of how you get rssi i'm sorry if i gave anyone the wrong info but i knew i was right as i get a bit anal over things when it comes down to spending money
Thanks Dave! Your pictures would be very helpful a lot. I'm not sure if you're using the DAC 3 in 1 sold on ebay (if you type it in, there's only one type), but having some your pictures would clarify a lot of confusion I and people are having. You'd think by now they have an official module that allows for RSSI to be conneceted directly to OSD's without buffer. Maybe in future.
Could someone go over the difference between this receiver and the first telemetry receiver? I love the FrSky receivers for their reliability would also like to use some of the other features too. Thank you in advance for any input
On the first version you had to mod the unit so that you could get the rssi out to send the info to your osd or ground station which ever . Now with this model and the D8RII theres no messing around its a simple plug and play so you can now use the DHT U and the sensor board and connect which ever sensors you wish its that simple
I'm not sure about dps-dave saying "directly connect to OSD" pluginplay, but I'll give it a try and see what happens. I assume you have done it before dps-dave. Hopefully, my OSD won't blow up due to high voltage.
Ive tried the rssi out on this d8r-sp (from the "Tx" pin) to the rssi input on RVOSD5 and it doesnt work like it should on any of the input settings available on RVOSD. Theres going to be a need for something to go between to put the frsky rssi signal to something rvosd will use properly. At least thats my experience!
Hi ke123, this is the answer from FRSKY: The D8RSP receiver only can output the CPPM, but could not send the RSSI signal out. Current only the D4FR receiver both have CPPM and RSSI output function: ***********frsky-rc****/ShowProducts.asp?id=89
Thanks for the community support guys. I realized the same thing too, it doesn't work so easily by just plugging it into the Tx. Need some sort of device in-between to get it to work for RSSI. At least for my RVOSD anyway, but I assume this is the same for DragonOSD too. Maybe there's someone out there that's successfully implemented this RSSI mod to work with RVOSD/DragonOSD etc...
Nothing is stupid question, just stupid answer, and I think it is RSSI digital out. :)
Excelente!! Instalei o módulo Hack no 7C, e instalei o receptor em stick elétrico para testes, funcionou 100pcnt.
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This works great, but I think they could improve the soft cover for a hard one. Antennas inside fix can fail if you don't take care of the while installing the receiver.
But I will keep buying them, no better ones at that price. I recommend them.
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This receiver works great. I am using them in two, three and a half and four meter sailplanes and have had no problems at all. I love the built in telemetry for receiver voltage and signal range. I use the plug in module in a JR9303. The telemetry helps you put the antennas in the best spot.