Graupner HOTT setup

These instructions show all steps needed to use a Graupner HOTT 2.4 GHz transmitter/receiver system with PPM sum stream.

Overview

Required steps for a brand new set:

1. update the firmware on transmitter and receiver
2. bind transmitter and receiver
3. set up thr transmitter
4. set up the receiver to PPM sum stream

Update the Software

When the transmitter is switches on the firmware version is diplayed short.
Check if the transmitter uses obsolete firmware version in comparison to the current firmware version available

The page the firmware can be downloaded also provides special information for the version, some require special handling

Update the Transmitter

Update via Micro SD card

This is available with firmware version v1.7xx and above for mx-12 and mx-16.

If a brand new Micro SD card is used, the folder architecture is not present:

1. put Micro SD card into transmitter
2. switch on transmitter
3. after transmitter bootet completely the Folder architecture has been created, switch off
4. remove Micro SD card

Update:

1. connect Micro SD card with pc
2. copy the firmware file in the Firmware folder and the language file in the VoiceFile folder
3. put Micro SD card into transmitter and switch it on
4. switch off HF
5. press up and down button on the left pannel simultaneously and SET on the right to get into the hidden mode
6. firmware update, choose the appropiate file
7. repeat this step with the voice file

If this fails, try the update with pc.

Update via PC

1. connect the transmitter with pc, switch on, install the Sil Labs CP210x USB UART driver if needed
2. open the Firmware Upgrade studio
3. Menue -> Port Select choose the COM port (Silicon Labs CP210x USB to UART Bride)
4. Controller Menu -> Transmitter -> Firmware Upgrade
5. File Browse -> choose downloaded firmware file
6. Download Start -> accept the RF OFF warning message
7. Controller Menue -> Transmitter -> Voice download
8. File Browse -> choose downloaded vioce file

Update the Receiver

1. download the firmware
2. open the Firmware Upgrade Studio
3. connect the receiver on the telemetry port via the GM-Genius adapter to the pc
4. Controller Menue -> Device -> HOTT Receiver
5. File Browse -> choose the downloaded firmware file
6. Program
7. press and hold SET
8. connect the receiver to a power supply
9. release SET
10. factory Reset

Factory Reset

1. press and hold SET
2. connect receiver with power
3. wait 5 sec
4. release SET

Binding

1. switch on the transmitter, turn off HF
2. connect receiver with power
3. go into the main menue via SET
4. got to rs bind
5. got to Module
6. if there is already a receiver bound , press SET to delete the binding
7. differs on receiver:
   1. GR-12 press and hold SET
   2. GR-16 press and hold SET until a red and green LED light together
   3. GR-24 press and hold SET until a red and green LED light together
8. within 3 seconds, press SET on transmitter at rx bind

Set up PPM SOMU

1. connect receiver with power
2. press ESC on transmitter for 2 sec, this will open the Telemtry menue
3. go to Settings & Data View
4. right to RX SERVO TEST
5. down to CH OUT TYPE
6. change this from ONCE (standard output) to SUMO (sum stream output)
7. confirm with SET
8. the number right of SUMO indicated how much channels are used, change them to the number of channels the transmitter provides

(e.g. GR-12 can output up to 12 channels in SUMO mode)

Hardware Tips & Tricks

Output Type
The receiver output can be changes to following:

• ONCE standard output
• SAME
• SUMI
• SUMO PPM Sum stream output
• SUMD

Signal Lengh
Servo signal Lengh can be changed in the Telemetry menue at the RX Srvo Test page.
Standard min: 1000µS
Standard max: 1000µS

Documentation

Graupner HOTT software
Mikrokoper MX-20