[Bug] Pixhawk 6C Mini Legacy - sbus not detected on 1.13, 1.14, 1.15, 1.16 #25852
Description
Describe the bug
FW PX4 Pro 1.16.0
Setup:
px4io does not see any radio input:
px4io status:
status_rc_ok: False
status_rc_sbus: False
I can build custom firmware on my local - ideas about how to further debug with a custom build are welcomed. 🧔♂️
The components being used have been confirmed working when the FC is flashed with ardupilot - sbus input is working and channel inputs are seen ! 🏄♂️
Please see following debug information:
nsh> listener input_rc
never published
nsh> rc_input
nsh: rc_input: command not found
nsh> px4io status
protocol 5 hardware 2 bootloader 3 buffer 64B crc 0x6603896e
8 controls 8 actuators 18 R/C inputs 2 analog inputs
px4io_status
timestamp: 1393364216 (0.256945 seconds ago)
voltage_v: 0.00000
rssi_v: 1.63500
free_memory_bytes: 1824
pwm: [0, 0, 0, 0, 0, 0, 0, 0]
pwm_disarmed: [1000, 1000, 1000, 1000, 1000, 1000, 1000, 1000]
pwm_failsafe: [1000, 1000, 1000, 1000, 1000, 1000, 1000, 1000]
pwm_rate_hz: [400, 400, 400, 0, 0, 0, 0, 0]
raw_inputs: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
status_arm_sync: True
status_failsafe: False
status_fmu_initialized: True
status_fmu_ok: False
status_init_ok: True
status_outputs_armed: True
status_raw_pwm: True
status_rc_ok: False
status_rc_dsm: False
status_rc_ppm: False
status_rc_sbus: False
status_rc_st24: False
status_rc_sumd: False
status_safety_button_event: False
alarm_pwm_error: False
alarm_rc_lost: True
arming_failsafe_custom: True
arming_fmu_armed: False
arming_fmu_prearmed: False
arming_termination: False
arming_io_arm_ok: False
arming_lockdown: False
arming_termination_failsafe: False
0 raw R/C inputs
ADC inputs 0 1181
features 0x0004 RSSI_ADC
sbus rate 72
debuglevel 0
INFO [mixer_module] Param prefix: PWM_MAIN
control latency: 0 events, 0us elapsed, 0.00us avg, min 0us max 0us 0.000us rms
Channel Configuration:
Channel 0: func: 0, value: 0, failsafe: 1000, disarmed: 1000, min: 1000, max: 2000
Channel 1: func: 0, value: 0, failsafe: 1000, disarmed: 1000, min: 1000, max: 2000
Channel 2: func: 0, value: 0, failsafe: 1000, disarmed: 1000, min: 1000, max: 2000
Channel 3: func: 0, value: 0, failsafe: 1000, disarmed: 1000, min: 1000, max: 2000
Channel 4: func: 0, value: 0, failsafe: 1000, disarmed: 1000, min: 1000, max: 2000
Channel 5: func: 0, value: 0, failsafe: 1000, disarmed: 1000, min: 1000, max: 2000
Channel 6: func: 0, value: 0, failsafe: 1000, disarmed: 1000, min: 1000, max: 2000
Channel 7: func: 0, value: 0, failsafe: 1000, disarmed: 1000, min: 1000, max: 2000
nsh> ver all
HW arch: PX4_FMU_V6C
HW type: V6C002001
HW version: 0x002
HW revision: 0x001
PX4 git-hash: c2fb48990aacebc938c4e9998c7d5348f858fd22
PX4 version: 1.17.0 40 (17891392)
OS: NuttX
OS version: Release 11.0.0 (184549631)
OS git-hash: b8a6c3268a20e126c83b84ebc5598f9318994200
Build datetime: Oct 15 2025 15:35:49
Build uri: localhost
Build variant: default
Toolchain: GNU GCC, 13.2.1 20231009
PX4GUID: 000600000000353438323233510d00450048
MCU: STM32H7[4|5]xxx, rev. V
nsh> ps
PID GROUP PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK USED FILLED COMMAND
0 0 0 FIFO Kthread N-- Ready 00000000 000726 000420 57.8% Idle Task
1 1 249 FIFO Kthread --- Waiting Semaphore 00000000 001224 000292 23.8% hpwork 0x240009ac
2 2 50 FIFO Kthread --- Waiting Semaphore 00000000 001576 000292 18.5% lpwork 0x24000998
3 3 100 FIFO Task --- Waiting Semaphore 00000000 003144 002076 66.0% nsh_main
4 4 255 FIFO Task --- Waiting Semaphore 00000000 001232 000436 35.3% wq:manager
5 4 205 FIFO pthread --- Waiting Semaphore 00000000 003472 001412 40.6% wq:lp_default 0x81ea458
614 4 253 FIFO pthread --- Waiting Semaphore 00000000 002368 001804 76.1% wq:SPI1 0x81eb8a4
1127 1127 100 FIFO Task --- Waiting Signal 00000000 002704 001684 62.2% mavlink_if0 mavlink start -d /dev/ttyS5 -b p:SER_TEL1_BAUD -m p:MAV_0_MODE -r p:MAV_0_RATE -f -s -x
1129 1127 175 FIFO pthread --- Waiting Semaphore 00000000 004832 001316 27.2% mavlink_rcv_if0 0x30000028
938 938 140 FIFO Task --- Waiting Signal 00000000 003192 001704 53.3% commander start
619 4 243 FIFO pthread --- Waiting Semaphore 00000000 002312 000792 34.2% wq:I2C4 0x81eb854
1068 1068 205 FIFO Task --- Waiting Semaphore 00000000 001936 001004 51.8% gps start -d /dev/ttyS0 -b p:SER_GPS1_BAUD
1261 1243 60 FIFO pthread --- Waiting Semaphore 00000000 001144 000380 33.2% log_writer_file 0x30008b90
1294 1294 100 FIFO Task --- Waiting Signal 00000000 002792 001724 61.7% mavlink_if1 mavlink start -d /dev/ttyACM0 -m 2
1295 1294 175 FIFO pthread --- Waiting Semaphore 00000000 004832 001668 34.5% mavlink_rcv_if1 0x30014278
1264 4 236 FIFO pthread --- Waiting Semaphore 00000000 003600 002180 60.5% wq:uavcan 0x81b3d60
1297 1297 100 FIFO Task --- Running 00000000 002000 001460 73.0% mavlink_shell
914 4 230 FIFO pthread --- Waiting Semaphore 00000000 001704 001052 61.7% wq:ttyS4 0x81eb804
1174 1174 105 FIFO Task --- Waiting Semaphore 00000000 002144 001568 73.1% navigator start
567 567 90 FIFO Task --- Waiting Semaphore 00000000 001376 000844 61.3% dataman
825 4 242 FIFO pthread --- Waiting Semaphore 00000000 002216 001244 56.1% wq:nav_and_controllers 0x81b83a8
826 4 255 FIFO pthread --- Waiting Semaphore 00000000 003120 002304 73.8% wq:rate_ctrl 0x81e5550
1243 1243 230 FIFO Task --- Waiting Semaphore 00000000 003608 003028 83.9%! logger start -b 64 -t -m all
828 4 241 FIFO pthread --- Waiting Semaphore 00000000 005976 003836 64.1% wq:INS0 0x81eb84c
829 4 240 FIFO pthread --- Waiting Semaphore 00000000 005976 003836 64.1% wq:INS1 0x81eb844
543 4 237 FIFO pthread --- Waiting Semaphore 00000000 002776 001108 39.9% wq:hp_default 0x81b3324
To Reproduce
No response
Expected behavior
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Screenshot / Media
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Flight Log
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Software Version
No response
Flight controller
No response
Vehicle type
None
How are the different components wired up (including port information)
No response
Additional context
No response