Pixhawk 6x "System Power Unavailable"

PX4 Autopilot
3

Hey everyone!
We’re experiencing the same issue. Our setup includes a 6X and two external ADS1115 ADCs connected to POWER 1 and 2. We’re running on 12s, PX4 1.14 and the ADC_ADS1115_EN parameter enabled. We do have valid voltage and current readings on both channels. During booting we usually (>75%) get the “System Power unavailable” message.
Help would be greatly appreciated.

Kind regards,

Heiko

Console output:

HW arch: PX4_FMU_V6X
HW type: V6X000003
HW version: 0x000
HW revision: 0x003
PX4 git-hash: b8c541dd7277ed735139d7d1bfb829d61fbe29fb
PX4 version: Release 1.14.0 (17694975)
OS: NuttX
OS version: Release 11.0.0 (184549631)
OS git-hash: de41e7feaeffaec3ce65327e9569e8fdb553ca3d
Build datetime: Oct 19 2023 16:24:32
Build uri: localhost
Build variant: default
Toolchain: GNU GCC, 9.3.1 20200408 (release)
PX4GUID: 000600000000363339383137511300090017
MCU: STM32H7[4|5]xxx, rev. Y
INFO  [param] selected parameter default file /fs/mtd_params
INFO  [param] importing from '/fs/mtd_params'
INFO  [parameters] BSON document size 4559 bytes, decoded 4559 bytes (INT32:90, FLOAT:130)
INFO  [param] selected parameter backup file /fs/microsd/parameters_backup.bson
Board architecture defaults: /etc/init.d/rc.board_arch_defaults
Board defaults: /etc/init.d/rc.board_defaults
Loading airframe: /etc/init.d/airframes/12001_octo_cox
INFO  [dataman] data manager file '/fs/microsd/dataman' size is 62560 bytes
rgbled_ncp5623c #0 on I2C bus 1 (external) address 0x39
INFO  [px4io] IO FW CRC match
Board sensors: /etc/init.d/rc.board_sensors
ads1115 #0 on I2C bus 1 (external) address 0x48
bmi088_accel #0 on SPI bus 3 rotation 4
bmi088_gyro #0 on SPI bus 3 rotation 4
INFO  [ads1115] ADS1115: reported ready
icm42688p #0 on SPI bus 2 rotation 6
ERROR [ads1115] ADS1115: not ready. Device lost?
icm42670p #0 on SPI bus 1 rotation 10
INFO  [ads1115] ADS1115: reported ready
bmm150 #0 on I2C bus 4 (external) address 0x10
ERROR [ads1115] ADS1115: not ready. Device lost?
ist8310 #0 on I2C bus 1 (external) address 0xE rotation 10
INFO  [ads1115] ADS1115: reported ready
bmp388 #0 on I2C bus 4 (external) address 0x77
ERROR [ads1115] ADS1115: not ready. Device lost?
INFO  [ads1115] ADS1115: reported ready
bmp388 #1 on I2C bus 2 (external) address 0x76
ERROR [ads1115] ADS1115: not ready. Device lost?
INFO  [ads1115] ADS1115: reported ready
ERROR [ads1115] ADS1115: not ready. Device lost?
WARN  [SPI_I2C] ms5611: no instance started (no device on bus?)
INFO  [ads1115] ADS1115: reported ready
ERROR [ads1115] ADS1115: not ready. Device lost?
WARN  [SPI_I2C] Already running on bus 1
INFO  [ads1115] ADS1115: reported ready
ekf2 [782:237]
Starting MAVLink on /dev/ttyS6
INFO  [mavlink] mode: Normal, data rate: 1200 B/s on /dev/ttyS6 @ 57600B
Starting MAVLink on /dev/ttyS1
INFO  [mavlink] mode: Normal, data rate: 100000 B/s on /dev/ttyS1 @ 57600B
INFO  [rc_input] valid device required
ERROR [rc_input] Task start failed (-1)
INFO  [logger] logger started (mode=all)
INFO  [logger] Start file log (type: full)
INFO  [uavcan] Node ID 1, bitrate 1000000

NuttShell (NSH) NuttX-11.0.0
nsh> e[KWARN  [health_and_arming_checks] Preflight Fail: system power unavailable
INFO  [logger] [logger] /fs/microsd/log/sess104/log100.ulg	
INFO  [logger] Opened full log file: /fs/microsd/log/sess104/log100.ulg
INFO  [vehicle_magnetometer] MAG switch from #0 -> #1

Mavlink console output:

nsh: sysinit: fopen failed: No such file or directory

NuttShell (NSH) NuttX-11.0.0
nsh> ads1115 status
INFO  [SPI_I2C] Running on I2C Bus 1, Address 0x48
ads1115: single-sample: 2441 events, 4201938us elapsed, 1721.40us avg, min 1703us max 1852us 1664.237us rms
INFO  [SPI_I2C] Running on I2C Bus 2, Address 0x48
ads1115: single-sample: 2442 events, 4154714us elapsed, 1701.36us avg, min 1682us max 1819us 1659.885us rms
nsh> listener adc_report

TOPIC: adc_report
 adc_report
    timestamp: 49304100 (0.019352 seconds ago)
    device_id: 9455625 (Type: 0x90, I2C:1 (0x48))
    raw_data: [16437, 3462, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
    resolution: 32768
    v_ref: 6.14400
    channel_id: [0, 1, 2, 3, -1, -1, -1, -1, -1, -1, -1, -1]

nsh> listener adc_report

TOPIC: adc_report
 adc_report
    timestamp: 50585217 (0.003269 seconds ago)
    device_id: 9455633 (Type: 0x90, I2C:2 (0x48))
    raw_data: [16434, 3463, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
    resolution: 32768
    v_ref: 6.14400
    channel_id: [0, 1, 2, 3, -1, -1, -1, -1, -1, -1, -1, -1]

nsh>

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