Radio Control Calibration no respawn with radiomaster ER8 2.4GHz ELRS PWM receiver

[kindred obsidian]

Hello everyone~
I have a question to ask, I’m currently build Fix WING plane or VTOL using the following equipment:
Flight control board: PixHawk 6C
GPS: Holybro M10 GPS
Power supply model: Holybro PM07
Transmitter: Radiomaster TX16S + Radiomaster Ranger micro
Receiver: ER8 2.4GHz ELRS PWM receiver
Ardupilot version: 4.5.4
Aircraft type: maybe Three-rotor configuration

This is my question:
I have successfully paired a TX16S with an ER8, but when performing a radio control calibration in ardupilot, the green bar never appears. At the same time, I also went to holybro’s website and ExpressLRS website to learn that the serial port needed to be modified. Later, the serial port was also modified to use UART 5, the protocol function was set to RCin, and the bitmask was set to InvertRX/InvertTX/HalfDuplex. /RX_PullDown (only one of the above four options is turned on, not all at the same time), but the situation is still the same.
This problem has bothered me for a long time and made me very frustrated, so I wanted to seek help.
Below is the wiring diagram and Ardupilot settings.

thank you for your assistance

[stiff hornet]

post your param file please

[kindred obsidian]

which param file ?

[stiff hornet]

ardupilot param file

which should contain all the parameters/settings for your autopilot

[kindred obsidian]

Is this right?

[stiff hornet]

I would suggest following the ardupilot docs:
https://ardupilot.org/plane/docs/common-holybro-pixhawk6C.html

this calls using telem3, which is serial 5, for receivers

also make sure your RC_Options at least have the last bit enabled (420K baud)

setting rc_protocols to just CRSF also helps, but not needed (512 is the value)

[kindred obsidian]

OK
thank you for help.
I will try it

[kindred obsidian]

where can i see those parameter?

[stiff hornet]

in the parameter tree

[kindred obsidian]

but i don't have the parameter tree option

[stiff hornet]

this works as well.. just scroll up because the parameters are listed in alphabetical order

[kindred obsidian]

i can not see RC_Options of the ELRS for 420K baud

[stiff hornet]

that could mean your ardupilot version is old

or your mp is old

[kindred obsidian]

mission planner is 4.5.4

[stiff hornet]

do you mean ardu?

[kindred obsidian]

ardupilot copter Version now is 4.5.4

[kindred obsidian]

yes

[stiff hornet]

so it's your mission planner

[kindred obsidian]

yes...?

oh!
i am so sorry
mission planner is version 1.3.81

[stiff hornet]

have you done a search for rc_options on the right hand side menu?

under the parameter list

because I can see it on here

I am on 4.4.0-beta though

[kindred obsidian]

i find it.

but i complete the setting and the radio control calibration still no respawn...

[stiff hornet]

did you move your wiring to the telem3 port?

did you change your previous serial options to default because you cannot have to serial ports with the same 23 setting

[kindred obsidian]

i change it already

[kindred obsidian]

Do you mean this?

[stiff hornet]

why is it set to none this time?

could you post another photo of the wiring please

and an up-to-date param file

[stiff hornet]

are you testing it right now? is your tx and rx bound/connected?

could you post a screenshot of the expressLRS lua script showing the TX and Rx are bound/connected?
(C in top right corner of the screen)

your serial5 options is set to 7

should be 0

[kindred obsidian]

i am test it now

[stiff hornet]

have you changed Serial5_Options so that it's set to 0?

[kindred obsidian]

Yes

[stiff hornet]

and still no way to calibrate?

could you put the receiver into wifi mode, connect and load the webui, then post screenshots of the options and model tabs?

[kindred obsidian]

now it working ! !

that is webui ?

[stiff hornet]

if it's already working then disregard

but this is the expressLRS webUI
https://www.expresslrs.org/quick-start/webui/