User's Manual
4. Firmware update Graupner-HoTT 2.4 Transmitter and receiver
Firmware updates for the transmitter RF module can be transferred via the DATA or telemetry interface
in conjunction with a PC running Windows XP, Vista or 7. For this you also require the USB interface,
Order No. 7168.6, and the adapter lead, Order No. 7168.6A, which are available separately.
The programs and fi les required for this are available from www.graupner.de in the Download area for
the corresponding products.
Install the Firmware Update Utility Graupner and the USB drivers on your computer. Check the system
requirements!
The fi rst step is to cut through the central red wire in the adapter lead,
Order No. 7168.6A, then connect the lead to the USB interface, Order
No. 7168.6. This socket is also polarised; note the small chamfer on one
edge. Never use force - the plug should engage easily and fully.
4.1. Transmitter
Connect the adapter lead to the DATA socket on the back of the trans-
mitter, as shown in the illustration. This socket is also polarised; note the
small chamfer on one edge. Never use force - the plug should engage
easily and fully.
The socket polarity is also marked on the case: the black wire (-) must be
at the bottom, the white wire (S) at the top.
4.2. Receiver
Connect the adapter lead to the socket on the left-hand end of the recei-
ver, as shown in the illustration. This socket is also polarised; note the
small chamfer on one edge. Never use force - the plug should engage
easily and fully.
The black wire (-) must be at the front, the white wire (T) at the back.
Note: Updates for the receiver 33506 can only be done with the help of
the SMART-BOX (Order No. 33700). Please read the instructions for the
SMART-BOX!
4.3. Update procedure
Ensure that the adapter lead is confi gured as shown in the illustrations, and is connected correctly to
the transmitter or receiver.
Start the Graupner Firmware Update Utility.
Under [COM Port Setup] select the correct COM
port, i.e. the one to which the USB lead is con-
nected. If you are not sure of this, open WIN-
DOWS System Control / System / Hardware /
Device Manager. Under Ports select “Silicon
Labs CP210x USB to UART Bridge” and read
off the port it is using.
Under [Interface Type] click on Signal
2:Vcc:Gnd.
Now click on the “Browse” button and select the
folder containing the previously loaded fi rmware
fi le ending in *.bin. If everything is correct, the
10 Getting Started Graupner HoTT 2.4
fi le will appear in the corresponding window.
The fi rmware fi les are encoded in product-specifi c form, i.e. if you accidentally select a fi le which does
not match the product (e.g. transmitter update fi le instead of receiver fi le), then the pop-up window “Pro-
duct code error” will appear, and you will not be able to start the update procedure.
Press the “Program” button in the software.
Transmitter: press the BIND / RANGE button, and switch the transmitter on while you hold it pressed
in.
Receiver: press the SET button, and switch the receiver on while you hold it pressed in.
After a few seconds the Status screen displays the message “Found target device…”; you can now
release the button, and the fi rmware update process commences.
If the device is not recognised, if the pop-up window “Found not target device ID” appears, or if the
process fails before 100% is reached, you must restart the update procedure. Repeat all the steps as
described above.
The Status display and the Progress bar show the progress of the fi rmware update. The update is com-
pleted when the message “Successfully…100%” or “Successfully Done!!” appears.
During the update process both LEDs on the transmitter glow constantly. When it is complete, the red
LED goes out and you will hear a brief confi rmation melody. Both LEDs on the receiver also light up;
when the process is complete, the green LED goes out, and the red LED starts fl ashing.
Switch your transmitter / receiver off, and disconnect the adapter lead.
Caution: after completing an update process, you must initialise the device before using it, i.e.
reset it to the factory default values,.
Initialisation:
Transmitter: To initialise the system, i.e. to reset it to the factory default settings, locate the BIND /
RANGE button on the back of the transmitter, hold it pressed in while you switch the transmitter on, then
release the BIND / RANGE button again.
Receiver: To initialise the system, i.e. to reset it to the factory default settings, locate the BIND / RANGE
button on the back of the transmitter, hold it pressed in while you switch the transmitter on, then release
the BIND / RANGE button again. Now immediately press and hold the SET button on the receiver,
switch it on, and release the SET button again. After about two or three seconds the green LED on the
receiver lights up to confi rm that your radio control system has been re-initialised.
Please note:
The initialisation procedure erases ALL the settings you have entered. Where necessary, you will need
to program your preferred settings again.
When initialisation is complete, the transmitter will be in Fail-Safe set-up mode. You can therefore imme-
diately continue by programming your fail-safe settings.
If you previously set your transmitter’s Country setting to “France” mode, you must also re-enter the
Country setting.
Please refer to the appropriate section in your RC system instructions for the procedure.
Any settings you have entered using the SMART-BOX are also lost when you initialise the recei-
ver. If you carry out a receiver fi rmware update, you will need to re-enter these settings.
Getting Started Graupner HoTT 2.4 11