seem i found a problem - it's abattery
If we don't se on chip model and return from m41t81s to m41t80 in dts all worked fine RTC and watchdog(but watchodg has only on 81s)

@Lazar-Demin Thank you!

oh yes. We are waitinig it too. Our customer needed supported OS.

@JeffZhou Hi, thank you for replay!
It is a pity that this error has surfaced just now.
We are not convinced that such resistor pull-down would be in industrial and stable solution.
So we'll thinking to redo the digital inputs via the I2C expanders.

@crispyoz firmware from official link
screenlog.0.log.bin rename it to *.log

root@Omega-7FEC:/sys/class/gpio# cat gpio16/value
1
root@Omega-7FEC:/sys/class/gpio# cat gpio17/value
1
root@Omega-7FEC:/sys/class/gpio# gpioctl dirout-low 16
Using gpio pin 16.
root@Omega-7FEC:/sys/class/gpio# cat gpio17/value
0
root@Omega-7FEC:/sys/class/gpio# cat gpio16/value
0
root@Omega-7FEC:/sys/class/gpio# gpioctl dirout-high 16
Using gpio pin 16.
root@Omega-7FEC:/sys/class/gpio# cat gpio16/value
1
root@Omega-7FEC:/sys/class/gpio# cat gpio17/value
1

I have tried to just give power and short-circuit the GPIO16 to the ground, LEDs 16 and 17 turned on.
On GPIO17 0,2V!
on 5 sec booting Omega 2s on GPIO17 voltage changed to 1,16V and led17 has half brightness

[    5.082253] kmodloader: loading kernel modules from /etc/modules-boot.d/*
[    5.369089] usbcore: registered new interface driver usbfs
[    5.374833] usbcore: registered new interface driver hub
[    5.380329] usbcore: registered new device driver usb
[    5.391769] exFAT: Version 1.2.9
[    5.429882] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    5.445925] SCSI subsystem initialized
[    5.455363] ehci-platform: EHCI generic platform driver
[    5.471029] phy phy-10120000.usbphy.0: remote usb device wakeup disabled
[    5.477840] phy phy-10120000.usbphy.0: UTMI 16bit 30MHz
[    5.483179] ehci-platform 101c0000.ehci: EHCI Host Controller
[    5.489038] ehci-platform 101c0000.ehci: new USB bus registered, assigned bus number 1
[    5.497220] ehci-platform 101c0000.ehci: irq 26, io mem 0x101c0000
[    5.532951] ehci-platform 101c0000.ehci: USB 2.0 started, EHCI 1.00
[    5.540433] hub 1-0:1.0: USB hub found
[    5.544683] hub 1-0:1.0: 1 port detected
[    5.554642] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    5.562524] ohci-platform: OHCI generic platform driver
[    5.568200] ohci-platform 101c1000.ohci: Generic Platform OHCI controller
[    5.575169] ohci-platform 101c1000.ohci: new USB bus registered, assigned bus number 2
[    5.583314] ohci-platform 101c1000.ohci: irq 26, io mem 0x101c1000
[    5.657966] hub 2-0:1.0: USB hub found
[    5.662234] hub 2-0:1.0: 1 port detected
[    5.680547] MTK MSDC device init.
[    5.743142] mtk-sd: MediaTek MT6575 MSDC Driver
[    5.754708] sdhci: Secure Digital Host Controller Interface driver
[    5.761004] sdhci: Copyright(c) Pierre Ossman
[    5.767056] sdhci-pltfm: SDHCI platform and OF driver helper
[    5.778046] usbcore: registered new interface driver usb-storage
[    5.791193] kmodloader: done loading kernel modules from /etc/modules-boot.d/*
[    5.809091] init: - preinit -
[    5.860389] mmc0: new high speed MMC card at address 0001
[    5.871528] mmcblk0: mmc0:0001 NCard  7.22 GiB
[    5.883474] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
[    5.898564] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
[    5.914364]  mmcblk0: p1

Video

@crispyoz does you see this video?
Problem exist may be on some devices not last released and we have it from a box. We order development kit and on him problem exist too.
And we don't know what to do.
We need support. A big party depends on it.

@Lazar-Demin, yes i already try other units of omega as 2s+ and 2S same result(more then 10 units) and of corse all test made in you official firmware without our modification. Only Omega2s/2s+ an Development Kit.
Have you try do this test as show on video?

@Lazar-Demin, yes i already try other units of omega as 2s+ and 2S same result(more then 10 units) and of corse all test made in you official firmware without our modification. Only Omega2s/2s+ an Development Kit.
Have you try do this test as show on video?

@Lazar-Demin Hi!
i have try all of this on development board and problem is repeated(Ω-ware: 0.3.2 b244)
So an issue with the Omega itself! visual