Help! Help! Pairing Radiomaster Pocket with X-Cub 450mm

[lance wisher]

Hey everyone, I’m Lance and I’m pretty new to RC planes but I'm having a blast with my first plane - a Hobbyzone xcub 450mm. I just picked up a RadioMaster Pocket running EdgeTX and added an iRX4 Lite 4-in-1 module so I can fly my Spektrum recievers (DSM), like in my HobbyZone X-Cub 450 mm. Trying to get this combo to work has me stumped and I could really use some advice from anyone who’s gone down this road before.

I flashed the latest EdgeTX (v2.11.0) to my Pocket transmitter and copied over the SD card contents. I then downloaded and flashed the iRX4 Lite firmware in Serial-DSM-Auto mode with AETR air settings. On the plane side, I have looked into the fuselage but cannot find any manual bind button on the PCB. Every time I plug in the plane battery the receiver LED slow-blinks, which I understand means it’s waiting to bind—but when I try to bind from the transmitter by clicking [Bnd] in the external RF setup, the plane doesn't respond and the light keeps blinking instead of going solid like it does with the RTF transmitter that it came with. I’ve tried adjusting throttle trims, verifying SAFE mode is on Beginner, and even swapping sub-protocols (DSM2-22 ms, DSMX) but no luck.

Other stuff I've tried:

• Double-checked External RF settings (MULTI → DSM → Auto) and turned off internal RF.

• Made sure throttle stick is exactly at its lowest and SAFE switch isn’t in Expert.

• Used [Bnd] within 5 seconds of plugging in the plane’s LiPo, watched the module LED flash fast then go solid.

• Confirmed Mixer and Outputs screens have no blank lines for CH1–CH5.

• Range-tested at 2 m with [Rng] and saw the module’s red LED slow-blink after bind.

• Re-formatted SD, re-flashed module firmware (v1.3.4+), and removed any leftover Lua scripts that might interfere.

• Is there any hidden setting or sequence I’m missing to actually send channel data after bind?

• Could the plane’s receiver board be permanently set to an old GUID so it never “re-listens” for new binds?

• Has anyone had to modify the plane’s firmware or patch the PCB to force a manual bind since there’s no button?

I’d love to get this X-Cub up and flying—any pointers, troubleshooting steps, or even wild hacks are welcome.

Thanks in advance!!!

- Lance

 

[Bricks]

Not familiar with the Pocket radio but your channel order is wrong for Spektrum should be TAER.

 

[Captain J]

what did

Hey everyone, I’m Lance and I’m pretty new to RC planes but I'm having a blast with my first plane - a Hobbyzone xcub 450mm. I just picked up a RadioMaster Pocket running EdgeTX and added an iRX4 Lite 4-in-1 module so I can fly my Spektrum recievers (DSM), like in my HobbyZone X-Cub 450 mm. Trying to get this combo to work has me stumped and I could really use some advice from anyone who’s gone down this road before.

I flashed the latest EdgeTX (v2.11.0) to my Pocket transmitter and copied over the SD card contents. I then downloaded and flashed the iRX4 Lite firmware in Serial-DSM-Auto mode with AETR air settings. On the plane side, I have looked into the fuselage but cannot find any manual bind button on the PCB. Every time I plug in the plane battery the receiver LED slow-blinks, which I understand means it’s waiting to bind—but when I try to bind from the transmitter by clicking [Bnd] in the external RF setup, the plane doesn't respond and the light keeps blinking instead of going solid like it does with the RTF transmitter that it came with. I’ve tried adjusting throttle trims, verifying SAFE mode is on Beginner, and even swapping sub-protocols (DSM2-22 ms, DSMX) but no luck.

Other stuff I've tried:

• Double-checked External RF settings (MULTI → DSM → Auto) and turned off internal RF.
• Made sure throttle stick is exactly at its lowest and SAFE switch isn’t in Expert.
• Used [Bnd] within 5 seconds of plugging in the plane’s LiPo, watched the module LED flash fast then go solid.
• Confirmed Mixer and Outputs screens have no blank lines for CH1–CH5.
• Range-tested at 2 m with [Rng] and saw the module’s red LED slow-blink after bind.
• Re-formatted SD, re-flashed module firmware (v1.3.4+), and removed any leftover Lua scripts that might interfere.

• Is there any hidden setting or sequence I’m missing to actually send channel data after bind?
• Could the plane’s receiver board be permanently set to an old GUID so it never “re-listens” for new binds?
• Has anyone had to modify the plane’s firmware or patch the PCB to force a manual bind since there’s no button?

I’d love to get this X-Cub up and flying—any pointers, troubleshooting steps, or even wild hacks are welcome.

Thanks in advance!!!

- Lance

what protocol did you select?

you may have said snd i missed, if so ooooooooops.

 

[Captain J]

while waiting for response on above…

this is off memory…

you need to know your receiver protocol, beyond turning off internal rf and turning turning on external rf you then habe to select what protocol to use, then bind.

 

[LitterBug]

I basically have the same pocket setup but with a RadioMaster external 4in1. DSM Auto should work. Make sure you have 3+ feet between you and the model when binding.

Usually these micro planes will go into autobind if they are plugged in and no signal is detected after 30 seconds. That would be indicated by fast blinking on the RX

 

[LitterBug]

I found the binding instuctions in the manual:

Binding is the process of programming the receiver to
recognize the GUID (Globally Unique Identifier) code of a
specific transmitter. The transmitter and receiver are bound at
the factory. If you need to rebind, follow the instructions below.
1. Ensure the transmitter throttle stick is in the lowest position.
2. Ensure the flight mode switch is in Beginner or
Intermediate mode.
3. Install and connect a fully charged flight battery to the
aircraft and power ON the transmitter within 5 seconds.
4. After approximately 5 seconds, the LED on the aircraft
flight control board will begin to flash rapidly.
5. When the LED on the aircraft’s flight control board stops
flashing, binding is complete.

Manual can be found here: https://www.horizonhobby.com/on/dem...ult/dw1bd89efe/Manuals/HBZ-1250_MANUAL_EN.pdf

 

[LitterBug]

Almost sounds like you should try enabling bind on the transmitter BEFORE plugging in the plane.