User Manual
4.1. Update process
Start the program „micro software loader“ with a double-click on the exe-fi le. Under „Com Port“ select the
correct COM port „Silicon Labs CP210x USB to UART Bridge“, i.e. the one to which the USB lead is
connected.
Now click on the “Datei” button and select the the previously loaded fi rmware fi le ending in *.bin. If eve-
rything 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
not match the product (e.g. transmitter update fi le instead of receiver fi le) you will not be able to start
the update procedure.
Press the Button „Start“.
Connect channel 5 of the receiver to the USB update cable and then turn it on. The LED expires and the
progress-bar shows you the progress of the fi rmware update. The update is complete when the bar reaches
the right end and the red LED on the receiver starts fl ashing. Because the receiver settings remain after the
update, the receiver can be used immediately.
The latest version of these instructions can be found at www.graupner.de
05 Manual Graupner HoTT 2.4
Manual Graupner HoTT 2.4 06
Specifi cations GR-12SH/SC+
Connector type SH / XH
Operating voltage (2.5) 3.6 ... 8.4 V
Modulation 2.4 GHz FHSS
Frequency 2400...2483.5
Weight ca. 1.5 g
Range approx. 800 m