3.9 KiB
Receivers (RX)
A receiver is used to receive radio control signals from your transmitter and convert them into signals that the flight controller can understand.
There are 3 basic types of receivers:
Parallel PWM Receivers PPM Receivers Serial Receivers
Parallel PWM Receivers
8 channel support, 1 channel per input pin. On some platforms using parallel input will disable the use of serial ports and SoftSerial making it hard to use telemetry or GPS features.
PPM Receivers
PPM is sometimes known as PPM SUM or CPPM.
12 channels via a single input pin, not as accurate or jitter free as methods that use serial communications, but readily available.
These receivers are reported working:
FrSky D4R-II http://www.frsky-rc.com/product/pro.php?pro_id=24
Graupner GR24 http://www.graupner.de/en/products/33512/product.aspx
R615X Spektrum/JR DSM2/DSMX Compatible 6Ch 2.4GHz Receiver w/CPPM http://orangerx.com/2014/05/20/r615x-spektrumjr-dsm2dsmx-compatible-6ch-2-4ghz-receiver-wcppm-2/
FrSky D8R-XP 8ch telemetry receiver, or CPPM and RSSI enabled receiver http://www.frsky-rc.com/product/pro.php?pro_id=21
Serial Receivers
Spektrum
8 channels via serial currently supported.
These receivers are reported working:
Lemon Rx DSMX Compatible PPM 8-Channel Receiver + Lemon DSMX Compatible Satellite with Failsafe http://www.lemon-rx.com/shop/index.php?route=product/product&product_id=118
S.BUS
16 channels via serial currently supported.
These receivers are reported working:
FrSky X4RSB 3/16ch Telemetry Receiver http://www.frsky-rc.com/product/pro.php?pro_id=135
OpenTX S.BUS configuration
If using OpenTX set the transmitter module to D16 mode and select CH1-16 on the transmitter before binding to allow reception of 16 channels.
OpenTX 2.09, which is shipped on some Taranis X9D Plus transmitters, has a bug - issue:1701. The bug prevents use of all 16 channels. Upgrade to the latest OpenTX version to allow correct reception of all 16 channels, without the fix you are limited to 8 channels regardless of the CH1-16/D16 settings.
XBUS
The firmware currently supports the MODE B version of the XBus protocol. Make sure to set your TX to use "MODE B" for XBUS in the TX menus! See here for info on JR's XBUS protocol: http://www.jrpropo.com/english/propo/XBus/
These receivers are reported working:
XG14 14ch DMSS System w/RG731BX XBus Receiver http://www.jramericas.com/233794/JRP00631/
SUMD
16 channels via serial currently supported.
These receivers are reported working:
GR-24 receiver HoTT http://www.graupner.de/en/products/33512/product.aspx
Graupner receiver GR-12SH+ HoTT http://www.graupner.de/en/products/870ade17-ace8-427f-943b-657040579906/33565/product.aspx
SUMH
8 channels via serial currently supported.
SUMH is a legacy Graupner protocol. Graupner have issued a firmware updates for many recivers that lets them use SUMD instead.
MultiWii serial protocol (MSP)
Allows you to use MSP commands as the RC input. Only 8 channel support to maintain compatibility with MSP.
Configuration
There are 3 features that control receiver mode:
RX_PPM
RX_SERIAL
RX_PARALLEL_PWM
RX_MSP
Only one receiver feature can be enabled at a time.
Serial RX
See the Configuration document some some RX configuration examples.
For Serial RX enable RX_SERIAL and set the serialrx_provider CLI setting as follows.
| Serial RX Provider | Value |
|---|---|
| SPEKTRUM1024 | 0 |
| SPEKTRUM2048 | 1 |
| SBUS | 2 |
| SUMD | 3 |
| SUMH | 4 |
| XBUS_MODE_B | 5 |
PPM/PWM input filtering.
Hardware input filtering can be enabled if you are experiencing interference on the signal sent via your PWM/PPM RX.
Use the input_filtering_mode CLI setting to select a mode.
| Value | Meaning |
|---|---|
| 0 | Disabled |
| 1 | Enabled |