FrSky - DHT DIY Module WITH Telemetry
1. Introduction
1.1 Compatibility:
Switch 1 | Switch 2 | Mode of DHT | Compatibility |
OFF | OFF | Two-way Mode | Two way telemetry receivers (D8R, D6FR) |
OFF | ON | V8 Mode | V8 receivers (V8FR-HV, V8R7-HV, V8R7-SP, V8R4) |
1.2 Specifications:
Dimension: 55mm*34mm*8mm
Operating Voltage Range: 6.0V-13.0V
Operating Current: 50mA
Output Power: 60mW
Resolution: 3072 (>11bit)
2. Setup
2.1 Installation process:
1)Open the transmitter, find out Battery power supply line, PPM signal line, and GND.
2)Take the order and solder Battery power supply line, PPM signal line, and GND to DHT with 3 wires.
(RED→V+; BLACK→GND; YELLOW→PPM)
3)Drill one hole on the transmitter to install the PCB with F/S button, GREEN/RED LED and two switches.
4)Connect the antenna connector at the port on transmitter board.
5)Drill a hole for antenna connector at suitable space on the transmitter (diameter 7mm is suitable).
6)Fix
the transmitter antenna on the connector .Turn the transmitter power on
and check the power indicator LED, which is normally light RED.
2.2 Bind procedure
1)Turn your transmitter on and switch it to PPM mode. Turn your transmitter off.
2) Turn your transmitter on while holding the F/S button on the transmitter module (Please make sure DHT is in its corresponding mode when working with V8 or two way telemetry receivers).
Release it in a few seconds. The RED LED on the transmitter module will
flash, indicating the transmitter is ready to bind the receiver.
3)Connect
battery to the receiver while holding the F/S button on the receiver.
The RED LED on the receiver will flash, indicating the binding process
is completed.
4)Turn
on the transmitter and re-connect battery to the receiver. The RED
SOLID LED on the receiver will indicate the receiver is receiving
commands from the transmitter.
5)After the above steps are completed, both the transmitter and the receiver are ready to be used.
Notice:
When working with two way telemetry receivers (D8R or D6FR), please
kindly make sure that the battery and servos are plugged into
CH1~CH8/CH1~CH6 rather than side port (A2/Rx), otherwise you will notice
no function of the servos.
2.3 Range check
It
is highly suggested to perform pre-flight range check. Caution must be
paid when you perform range check in environment with metal fences,
concrete buildings, or rows of trees. Loss of signal may be experienced
from reflections.
Please
kindly follow the steps below to perform range check: (Note: this
should be done with the receiver installed in the model):
1) Place the model at least two feet (60cm) above non-metal contaminated ground (like wooden bench).
2) Place the receiverΆs antennas apart. Do not let the antennas touch the ground.
3) Place the antenna of the transmitter in a vertical position.
4)
Turn on the transmitter and receiver, press the F/S button of the
transmitter for 4 seconds to enter range check mode, the RED LED of the
transmitter module will be off, GREEN LED will flash rapidly, the BEEPER
will sound. The effective distance will be decreased to 1/30 of full
range.
5)
Walk away from the model while simultaneously operating the controls on
the transmitter, confirming that all controls are completely and
correctly operated at least 30 meters away.
6) Press the F/S button for 1~4 seconds, the transmitter will exit range check mode. RED LED will be back on.
2.4 Signal loss indicator and failsafe setting
In
some special circumstances, such as strong interference, the signal may
be lost. When signal is lost in a short period, the receiver continues
to try to search for the transmitter, at the same time it keeps the last
command from the transmitter, until a new command is received.
FrSky receivers support failsafe function for all channels. Please kindly follow the steps below to set failsafe:
1) Bind the receiver first;
2) Set failsafe at any required position on any channel.
3)
Press briefly the F/S button of the receiver (less than 1 second), DHT
will make a long “beep” (when in its two way mode), indicating the
failsafe position is remembered by the receiver.
If you do not need the failsafe function any more, just re-bind the receiver to set default failsafe mode.
Relevant download links:
1) For V8 series: https://www.frsky-rc.com/download.asp?id=21
File names: “Manual_V8 Series” for V8FR-HV, V8R7-HV and V8R4 receivers;
“Manual_V8R7-SP: for V8R7-SP receiver;
2) For Two Way series: https://www.frsky-rc.com/download.asp?id=22
File names: “Manual_D8R (V2)” for D8R receiver;
“Manual_D6FRΆ for D6FR receiver;
“Protocol_two way telemetry series” for two way protocol;
“Instruction Manual and How-to for V2 upgrade” for two way upgrade how-to;
“Upgrade files for two way telemetry system(V2) ” for two way upgrade files.