Translations:Manuals:BXFbl:Radio Setup:ELRS/3/en: Difference between revisions

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= Connection scheme =
= Connection scheme =
<br />
<br />
You can use CRSF only for sending control data to you BEASTX device. In this case only connect the TX line of the receiver to the DI1/IO1 port of your BEASTX device.<br />
'''Control only:''' connect the receiver's TX line to the DI1/IO1 port of your BEASTX device. This sends control data via CRSF but gives no telemetry backlink.<br />
<br />
<br />
To enable the telemetry backlink to the radio, connect the RX line of the receiver to the SYS port of your BX device. When the SYS port is already occupied by an SRXL2 device (Spektrum AVIAN ESC) you can alternatively connect the RX line to the DI2 pin (MICROBEAST PLUS / ULTRA only).<br />
'''Control + telemetry:''' additionally connect the receiver's RX line to the SYS port of your BEASTX device. If SYS is already used by an SRXL2 device (Spektrum AVIAN ESC), connect RX to the DI2 pin instead (MICROBEAST PLUS / ULTRA only).<br />
<br />
<br />
In order to use SYS for connecting the BLE2SYS / USBSYS for using the StudioX app, simply disconnect the receiver from SYS temporarily, switch off your radio and power cycle your device. It will then enable "normal" SYS operation for programming purpose.<br />
CRSF telemetry serves two purposes: configuring the BEASTX system directly from the transmitter via a LUA script, and displaying live sensor data (voltage, RPM, temperature, etc.) on your radio. To use it, the SYS port must be set to '''CRSF''' at RECEIVER MENU point '''L''' (see [[Manuals:BXFbl:Receiver_M/en|RECEIVER MENU M]] for details).<br />
<br />
Telemetry only becomes active if the system detects an ELRS receiver at power-up. If no RC signal arrives within 5 seconds of power-up (e.g. because the transmitter is switched off), the SYS port automatically falls back to normal operation. This is a convenience feature: it lets you connect via the StudioX Flow app over USB2SYS/BLE2SYS without having to reset menu point L manually.<br />
<br />
<br />
{| class="wikitable" style="width:30%; text-align: center; margin-left: 50px; background-color: #F9DDCC; border: solid #F18308 2px;"
{| class="wikitable" style="width:30%; text-align: center; margin-left: 50px; background-color: #F9DDCC; border: solid #F18308 2px;"

Latest revision as of 12:18, 8 September 2026

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Message definition (Manuals:BXFbl:Radio Setup:ELRS)
= Connection scheme =
<br />
'''Control only:''' connect the receiver's TX line to the DI1/IO1 port of your BEASTX device. This sends control data via CRSF but gives no telemetry backlink.<br />
<br />
'''Control + telemetry:''' additionally connect the receiver's RX line to the SYS port of your BEASTX device. If SYS is already used by an SRXL2 device (Spektrum AVIAN ESC), connect RX to the DI2 pin instead (MICROBEAST PLUS / ULTRA only).<br />
<br />
CRSF telemetry serves two purposes: configuring the BEASTX system directly from the transmitter via a LUA script, and displaying live sensor data (voltage, RPM, temperature, etc.) on your radio. To use it, the SYS port must be set to '''CRSF''' at RECEIVER MENU point '''L''' (see [[Manuals:BXFbl:Receiver_M/en|RECEIVER MENU M]] for details).<br />
<br />
Telemetry only becomes active if the system detects an ELRS receiver at power-up. If no RC signal arrives within 5 seconds of power-up (e.g. because the transmitter is switched off), the SYS port automatically falls back to normal operation. This is a convenience feature: it lets you connect via the StudioX Flow app over USB2SYS/BLE2SYS without having to reset menu point L manually.<br />
<br />
{| class="wikitable" style="width:30%; text-align: center; margin-left: 50px; background-color: #F9DDCC; border: solid #F18308 2px;"
|+ style="caption-side:bottom;"|CRSF/ELRS connection options
|-
! style="width: 250px; background-color: #f4bf9e"  | DI1 / IO1
! style="width: 200px; background-color: #f4bf9e"  | SYS
! style="width: 250px; background-color: #f4bf9e"  | SAT
! style="width: 250px; background-color: #f4bf9e"  | DI2
|-
| TX line || - || - || -
|-
| TX line || RX line || ESC telemetry || -
|-
| TX line || SPEKTRUM SRXL2 ESC || - || RX line
|-
|}
<br />
<br />

Connection scheme


Control only: connect the receiver's TX line to the DI1/IO1 port of your BEASTX device. This sends control data via CRSF but gives no telemetry backlink.

Control + telemetry: additionally connect the receiver's RX line to the SYS port of your BEASTX device. If SYS is already used by an SRXL2 device (Spektrum AVIAN ESC), connect RX to the DI2 pin instead (MICROBEAST PLUS / ULTRA only).

CRSF telemetry serves two purposes: configuring the BEASTX system directly from the transmitter via a LUA script, and displaying live sensor data (voltage, RPM, temperature, etc.) on your radio. To use it, the SYS port must be set to CRSF at RECEIVER MENU point L (see RECEIVER MENU M for details).

Telemetry only becomes active if the system detects an ELRS receiver at power-up. If no RC signal arrives within 5 seconds of power-up (e.g. because the transmitter is switched off), the SYS port automatically falls back to normal operation. This is a convenience feature: it lets you connect via the StudioX Flow app over USB2SYS/BLE2SYS without having to reset menu point L manually.

CRSF/ELRS connection options
DI1 / IO1 SYS SAT DI2
TX line - - -
TX line RX line ESC telemetry -
TX line SPEKTRUM SRXL2 ESC - RX line



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