/sys/bus/iio/devices/ is empty

VIM3
1

vim3 ubuntu offical
/sys/bus/iio/devices/ is empty

2

overlays=i2c3

3

i want to use writingPi python to read the ADC raw value

4

Hello @ZA_YU

Which image you used?

@ivan.li please follow up.

6

ubuntu 20.04 official

7

@ZA_YU

Try this firmware:
http://dl.khadas.com/products/vim3/firmware/ubuntu/emmc/vim3-ubuntu-20.04-gnome-linux-4.9-fenix-1.5-230425-emmc.img.xz

khadas@Khadas:~$ cat /etc/fenix-release 
# PLEASE DO NOT EDIT THIS FILE
BOARD=VIM3
VENDOR=Amlogic
VERSION=1.5
ARCH=arm64
INITRD_ARCH=arm64
INSTALL_TYPE=EMMC
IMAGE_VERSION=1.5-230425
################ GIT VERSION ################
UBOOT_GIT_VERSION=khadas-vims-u-boot-v2015.01-v1.5-release
LINUX_GIT_VERSION=khadas-vims-linux-4.9-v1.5-release
FENIX_GIT_VERSION=v1.5
#############################################
khadas@Khadas:~$ 
khadas@Khadas:~$ 
khadas@Khadas:~$ 
khadas@Khadas:~$ cat /sys/bus/iio/devices/iio\:device0/in_voltage0_raw 
2812
khadas@Khadas:~$
8

thank you it soluted.