The Graupner GR-12L SUMD receiver provides up to 16 (8, 12
or 16) control output channels using either SUMD, SBUS or SP2048 digital output
The GR-12L has a dual diversity antenna utilizing the HoTT
protocol where it provides frequency hopping over 75 channels using the 2.4 GHz
band making it therefore very reliable with minimal influences of external interferences.
The GR-12L SUMD receiver has built in telemetry for RSSI,
temperature and receiver voltage and can be expanded with additional HoTT
modules such as GPS, voltage modules and more.
There are three optional connection pads for CH2-CH4 which
provide servo output signals or switching signals for LED’s or for driving
switching transistors (0V or 3.3V at max 4mA)
The GR-12L SUMD can operate under a wide range of voltage
levels 3.6V to 8.4V (functional down to 2.5V) and with the enhanced receiver
sensitivity the operating range has been substantially increased.
The RSSI value can be output at CH8, CH12 or CH16 with SUMD,
SBUS or SP2048.
The very compact design and low weight (5 grams) makes it
suitable for any multirotor, airplane or helicopter RC model.
The GR-12L SUMD Diversity receiver is designed to interface
with third party flight controllers like Betaflight, Raceflight, Potenza,
Bavarian Demon or flybarless controllers like Spirit, V-Stabi, Microbeast,
Ikon, Neuron, 3Digi or any SUMD/SBUS/SP2048 flight controller.
- Compact and light design
- Wide voltage operation for extended reliability 3.6V to 8.4V
(functional down to 2.5V)
- LED indicator shows receiver state
- Increased receiver sensitivity for extended range
- Built-in telemetry for signal strength, temperature and
- Adjustable digital output signal and RSSI setting over HoTT
- Built-in failsafe and hold functions
- Telemetry connection for additional sensors and modules
- Graupner GR-12L SUMD PCB Receiver
- Small Parts
Good drone Rx, but expensive.
The description provided of this receiver is lacking as it does not explain it's full capabilities.
The 20mm mounting "ears" can be carefully snapped off to make a very small receiver on par with a Frsky R-XSR.
It would be nice if the antennas were UFL antennas like on the regular gr-12l for quick repairs. They are soldered to the rx on this model.
Reception is excellent and the native rssi output is great.
4 of 5 stars because it's $10 too expensive compared to it's competitors and lack of availability at retailers.
Honestly, just offering a gr-12l (like the basic 6 channel) as serial version with no pin connectors (or as a user soldering version) would be perfect for 90% of 5" quad builds if it stayed at $30 price point.
Reviewed by: Gregory Strickling from US on 3/19/2019
Love this reciever!!!
Ordered this receiver for my brand new Armattan Marmotte freestyle drone and I love it, worked perfect with betaflight and has dual antennas!! Only thing I would change is just out the flat solder points on it without the holes so a guy can solder his flight controller wires directly onto it instead of using the the pins.
Reviewed by: Josh Rothenburger from Fort McMurray Alberta Canada on 4/19/2019