FrSky D8R-II PLUS 2.4Ghz 8CH Receiver with Telemetery
FrSKY ACCST technology is proven, approved by many model associations, tested and reviewed as the leading Chinese 2.4Ghz R/C Technology. If you think DSM2 or FASST is the best, think again!
New FrSKY ACCST (Advanced Continuous Channel Shifting Technology) gives you secure radio communicatios in 2.4Ghz band. ACCST 2.4GHz system shifts 80 channels around hundred times per second in the 2.4GHz band. This means that the system is completely resistant to interference in that band.
The Two-way Radio System developed by FrSky provides an additional return link that would be used for monitoring the Rx’s voltage, temperature, location, speed and so on.
Features: Advanced Continuous Channel Shifting Technology (ACCSTis our advanced tecnology it shifts channel hundred times per second and there is no signal conflicts and interruptions) robust frequency agility. Easy to bind and very fast link-up. Excellent reboot time. True Diversity with two antennas. All channels can be programmed with Failsafe, quickly and easily. Quick and extremely stable in performance. Precise and smooth servo response. Extended range (1.5km-2.5km).
Compatibility: Compatible with FrSky two way telemetry modules: DFT, DJT, DHT, DHT-U
Receiver Specification: Operating voltage: 3.5~10.0V Power consumption: 100mA Resolution: 3072 Analog voltage: 0~3.3V Number of channels: 8 Range: 1.5km-2.5km Dimensions: 55 x 25 x 14 mm Weight: 12.4g
I have found a noticeable increase in range by orienting the antennas 90 degrees from each other. Depending on the design of the model, this can be accomplished by routing one of the antennas through the top, side or bottom of the fuselage.
This is a simple method to upgrade this receiver to output CPPM :
You don't need a 'special tool' to do this, just a 3.3 V USB FTDI board.
1- You need a 3.3 V FTDI module (get it on ebay).
2- Download the FTDI FT_Prog application.
3- Follow the instructions on diydrones to invert the RS 232 signals (you click 2 boxes ...). Now your FTDI board is re-programmed (don't forget to revert to 'normal' if you want to use it like a regular FTDI board).
4- Download the D8R-XP_CPPM_27ms *firmware and frsky_update_rev11.exe from the FRSKY site.
5- Put the receiver in programming mode (with the jumper)
6- Plug Rx from the FTDI to Tx of the receiver (and vice versa).
7- Follow the simple steps of the frsky_update app.
Samuel, you don't need the FrSky sensor hub for the voltage detection circuit. I have several receivers working this way. A1 and A2 are the two voltage detection circuits. With a jumper on A1 and X this version of the receiver will read the internal from the battery or esc.
If you fly FPV, the audible RSSI alert for signal strength is worth it alone. Use the other channels for receiver voltage, main battery pack voltage, your choice... plus one RS232/serial port for realtime downlink to transmitter. Fantastic!
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These are just fabulous receivers. Tested my first one out on my Eflight Extra and got a few low signal beeps at the extreme far corners. Landed, rearranged the two antennas, and presto the problem solved. Also tested with several low state receiver batteries and it didn't hesitate to bitch. All this with no programming. I now own 8 of these little guys and real happy with all of them.