Fixed dts overlay file for Orange Pi Lite on Armbian 23.02.2 (attached).

[Deoptim]

Attention, whatever you do next is at your own risk!

Fixed dts overlay file for Armbian 23.02.2 (attached).

1. Now the system can fall asleep and wake up by a timer (without an external RTC, provided that it is powered) or by pressing a button - while wifi connects itself (if there is an automatic connection) and the system continues to work as if nothing had happened without unnecessary loading.
2. As a bonus, I added an indication of reading from a flash card as a red LED (this can be turned off).
3. I also activated the host on the micro-usb connector - now you can connect something else via the otg adapter as a third USB connector.

 

To apply this on your system dts overlay you need (from sudo) :
1. Download the file, say, to your home directory, then execute the command from this directory:

sudo dtc -@ -I dts -O dtb -o /boot/dtb/overlay/sun8i-h3-gpio-keys-led-suspend-usb-fixes.dtbo gpio-keys-led-suspend-usb-fixes.dts

 

2. If there are no errors, move on, if there are errors, then DO NOT continue!

3. Make a copy of the file "/boot/armbianEnv.txt":

sudo cp /boot/armbianEnv.txt /boot/armbianEnv.txt.orig

 

4. Open the "/boot/armbianEnv.txt" file in an editor of your choice:

sudo nano /boot/armbianEnv.txt

(I used the nano editor)

 

5. Add the line "gpio-keys-led-suspend-usb-fixes" to the "overlays=" item:

overlays=gpio-keys-led-suspend-usb-fixes

(do not touch the rest - if you make a mistake, you will have nothing to boot later, that's why you made a backup!)
if the parameter "overlays=" already has another parameter, add a space, for example:

overlays=analog-codec i2c0 gpio-keys-led-suspend-usb-fixes

 

6. Reboot the single-boarder, if the red LED flashes during the download process, it means it is working.

 

Additionally:
To make the system fall asleep and wake up on the button, you need to execute the command:

sudo systemctl suspend

(Next, when you press the button (if you do not turn off the power) - it will wake up as intended)

 

To make the system fall asleep and wake up on a timer, you need to execute the following commands (or enter into a script):

sudo sh -c "echo 0 > /sys/class/rtc/rtc0/wakealarm"
sudo sh -c "echo `date '+%s' -d '+ 3 minutes'` > /sys/class/rtc/rtc0/wakealarm"
sudo systemctl suspend

(where "3 minutes" change to your hibernation time, more details here)

 

Current consumption in idle mode - not loaded by the CPU :

Скрытый текст

 

Current consumption in sleep mode with timer:

Скрытый текст

 

If you just turn off the consumption in about of 80-90mA

 

P.S.
Following the example, in the same way, you can wake up, for example, from a specific button by adding the wakeup-source parameter to GPIO, more details on how to add your own button here.

 

https://www.mediafire.com/file/k8ioiezr7vuu93w/gpio-keys-led-suspend-usb-fixes.zip/file