Operation 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.
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 connected.
If you are not sure of this, press the button „Search“
and select in the pop-up window „Silicon Labs
CP210x USB to UART Bridge“ and press „OK“.
Under [Interface Type] click on Signal 2:Vcc:Gnd.
Now click on the “Browse” button and select the fol-
der containing the previously loaded fi rmware fi le
ending in *.bin. If everything is correct, the 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
06 Getting Started Graupner HoTT 2.4