The FrSky DHT-U Telemetry System is an all-in-one transmitter module and telemetry receiver. With this unit you will not only be able to view valuable information such as battery voltage, mAh used and more, but you will also be able to bind directly with compatible FrSky receivers - eliminating the need for a separate transmitter module. The DHT-U is compatible with module system transmitters such as Futaba, Hitec, and JR/Spektrum (module versions only).
*Note: The DHT-U will bind with all rx's shown below, but will only display telemetry info when used with telemetry rx's (D_Mode) Compatibility:
1) All-in-one combination of telemetry module, FrSky transmitting module, and in-built display w/alarm threshold settings 2) DHT-U can be clamped to the transmitter handle/antenna 3) Show in-flight data via in-built display 4) Capable of setting failsafe during flight 5) Firmware upgradable
*Note: Please see "Files" tab below for user manual.
PRODUCT ID: DHT-U
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2.4Ghz 7DB Antenna for FrSky Modules (And compatible Radios/Modules)
Anybody know if this would work with my 72mhz Hitec Optic 6? It has the removable RF module, and I believe the old Spectrum module (which was advertised for Futaba radios, not Hitec) worked in it.
Does this module supply the correct connector for my radio?
Does my (72mhz) radio send the correct signals to this module?
The reviews of the turnigy module glitching scares me. I haven't seen issues with this Frsky "standard" however.
Hi eric, the module is universal and comes with a cable that has three separate connectors to attach to the PPM Ve and GROUND pins. Its hooked up to pins on the back of your TX where the module goes. I've checked my manual and the optic 6 is actually mentioned on on the hitec diagram. It's extremely easy to install but I recommend that you secure the connectors to the TX with a small amount of hot glue as the cable is easily pulled out this way. Better yet, solder the wire directly to the pins or pcb if you are able. Highly recommended module. You get RX voltage readout on D type RXs standard. You'll need the telemetry hub and other sensors for extra functionality. Module has out of sight range!
Thanks. I later noticed the other version w/o the display lists the Optic 6. I think the other version is safer since it fits in place of the hitec RF module, and the wire to the display is only carrying the display data. It would not matter much if it was pulled out (I thought of the issue of the wire being yanked out yesterday - that would make for a very bad expensive day!).
I'm not sure if 6 channels is enough for a multi-rotor, so perhaps this is not the way to go? 4 channels for basic control, 5th for "return to home" or similar setting, and 6th channel (which are levers/sliders for flaps on the Optic 6) could be used for the flight mode perhaps (a switch would be much better though).
I currently saimply use rubber bands to hold my shutter button down, but my next camera might work better with a servo triggering it (to take HDRs and/or panoramics for example, plus new cameras shoot too darn fast in continuous mode!). Need another channel for this...
So I looked at the 9x Frsky Tx yesterday, but I'd need to install better firmware, buy the programmer* etc - what a hassle.
Somebody ought to sell the 9x with the mods already done, as people do for ESCs with SimonK firmware already installed.
I don't have experience with the stock Turnigy module but fly with confidence with this one. My TX was a 36MHz converted to DSM2. I'm slowly transferring my models from DSM2 to ACCST. True the receivers cost a bit more, but you won't look back. No brownouts and the extra functionality is worth it. Get the V8 type RX for models you don't need the telemetry to save a bit of $.
Seems like your roadblock is the TX then. There's a lot of 9X users that have successfully made the transition to new firmware so there's plenty of support out there. Could be a good investment, since it will pave the way to future updates and functionality. There's a way to display telemetry on the 9xr display using the FrSky DIY module. A bit of soldering work though. You're right about the direct plugin modules, very easy and safe. I ended up connecting mine to an internal 3 pin connector I made up using a servo lead. This was soldered to the back of the PPM, Ve and GND pins. No chance of being pulled out, I can also run another module in parallel now. See below in my reply to echosniper.
This unit replaces your TX module and requires connection to PPM,GRND and V from the module interface on you TX. You need an FRSKY ACCST telemetry capable receiver. Currently, telemetry capable model numbers usually begin with a D. You can then use the associated sensor hub, and any sensors that you require to take advantage of the telemetry capabilities of this module and display. Take note when ordering FRSKY receivers as most of the RX beginning with "V" are not telemetry capable and there are also FASST type receivers that you cannot use with this module.
Hi Youhaan, this response will only partly answer your question but I hope it will answer most and point you in the right direction. I'll break it up into two parts. (1) Non Module Based, (2) Module based. It goes like this: (1)Installation into Futaba 10c NON MODULE VERSION requires opening the transmitter and finding the PPM, Ve and GRND pins. You then need to solder the cable directly to the board. This type of installation is not power efficient as it does not disable the original Futaba on-board signal stage. (1) For MODULE BASED 10C, its as easy as removing the Futaba module, locating the PPM, Ve and GRND pins in the module bay and attaching the cable. Use a small dab of hot-glue to secure the cable connectors to the module bay so that they don't come off the pins. A better way is to run the cable into the TX and solder the cable to the back of the module pins. Plenty of info on the net and once you've don this, you'll find it easy to mod other brands. The product manual is also a good source.
How should be interpretated the RSSI readings?
with the Tx next to the plane i get 95/100/105 ...in flight with the plane at arround 250m high/away i see them fluctuate and sometimes even fall down to 56.
I dont know if thats normal or if that means is 56% of signal , db or what. Also i think it falls in a curve (the number falls slower and slower instead straight down).
Otherwise, in range check mode they say its 30 times less than standard.. i managed to do 100m in range-check mode and still had control .. that should translate in 3km range in normal mode.. but seeing the numbers drop to 56 dont know if its ok
File tab not working!
I already have ordered the FrSky DHT-U té*lé*metry system and on the page presentig the unit normally we can access to a notice or user manual under the file tab. When selecting the tab, nothing! no file etc ...
I bought this DHT-U telemetry display and DJT telemetry module with telemetry receiver and bunch of compatible sensors. I want to connect this display to Turingy 9XR transmitter.
The installation diagram for DHT-U shows that you need to plug 3 pin cable on the back of the 9XR with TX module disconneted but why if radio won't work if TX module is not installed.
do I miss something here ?
I never thought of that. So why to use DJT TELEMETRY MODULE then? If all csn be done just by Dht-u display?
I thought you need both to be connected to 9XR with 2 antennas because receiver has 2 antennas.
Hi JuanchoRC, both those combinations have the same telemetry transmitter module. The difference is the receivers. V8FR receiver does not do telemetry. From the combos you mentioned above, FrSky DF 2.4 comes with a telemetry receiver but you need an the LCD display FLD-02 to read telemetry from the module. Currently FrSky telemetry receivers all have a letter "D" in their model number. The DHT-U is a transmitter module and telemetry display combined in one unit, but does not come with a receiver.
Hi Guys this is my question.
I have a PCM Futaba radio actually i fly a gas airplane.
Now i want to check cylinder temps and rpm.
Could this system be used as standalone system? i want to maintain my PCM 72mhz Aircraft control system but with the telemetry to control only. Does this system works for my aplication? (actually i have a quanum system atached to my antena PCM, but it only shows rx battery voltage)
In other words could this system be used like the Quanum in terms of independence from the radio?
I have the dht-u and am pleased with it . Does everything I wanted but I would like to upgrade to 2.3.
I have read everything I can but cannot find the correct cable to fit the three pins in the side of the unit. Can anyone point me to the correct ready to use cable.
Ian, let me know how it goes please, all documentation i have read seems to relate to the FUC-2 cable. FUC-2 appears to have mini USB 5 pin port for connecting to DHT-U, but my DHT-U does not appear to have this mini USB port. Tonight i am going to open its case and see if the port is inside.
i received my unit yesterday, plugged in to the 9xr (pins combination based on 9x). i turned on the 9xr,but the display on the DHT-U is blank. i see a layer of lcd being activated, but no menu was being observed. is it a faulty device or firmware problem?
I have wanted to try using telemetry however I don't have a clue what to buy.I have a Spectrum 7 channel transmitter.My planes are all large 50 cc or 12 cell electrics.Give me a list of parts and where each goes.
DHT-U does not have a back lit screen and we have to buy the FUC-2 separately.
Had to write this separately as hitting reply is asking me to login again and doing so is not helping and going back in login loop.
Is FrSky DHT-U Telemetry System compatible with Frsky D8R-XP?
This site only informs of D8R and D8RSP and not XP.
Secondly, this combination (DHT-U and D8R-XP)is better than the FrSky DF 2.4Ghz Combo Pack for JR w/ Module & RX in what way?
Thanks in advance.
DHT has the display included and a slot for a SD card (to logg GPS e.g.)
I received the DHT-U module and the D8R-II two days ago and it took me 10 mins to install on my Futaba 8UAPS transmitter. Instructions ere very clear on how to install the 3 connectors. I linked it to the receiver and could not get the receiver to work. BRAIN FADE you have to set the DHT-U Menu screen 1 from BIND to NORMAL then the receiver works fine. I am looking forward to flying with this unit with the Telemetry very soon. I had my son who never worked on this system setup it and he took 15 mins to get working. This is the best 2.4Ghz Telemetry system I have seen. I have several 2.4Ghz systems and this one works the best
Thank you FRSKY and HobbyKing,
Housing is cheap but so is price. This is a great all in One solution for everything on tx side. Easy to install.
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I need to conect this screen with the module DHT two ways telemetry from FrSky, please some one could help me, because I'm really Lost. I thing I choose the wrong item. Maybe the other could be better.[em_cry]
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I just received this module and make a test. I connected this module to Turnigy 9x powered up O.K. fnd bind one receiver D8R-II, also connected voltage sensor to receiver and sensor hub with altitude sensor.
During the flight on FPV plane was very useful get RSS level, get 850 meters and siglal level drops to 42pcnt fnd I turnned back.
So for now I am satisfied.
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I have made up three adapters to work with different Futaba transmitters. One for the newer square buddy box plug, one for the round buddy box plug, and one for the Futaba 8uap/7uap plugin rf module. I can now move to any of the above transmitters by just plugging in the module.