I managed to make an ALS (Ambient Light Sensor) with instructions from here (GitHub - MatejKocourek/spark-als: USB HID Ambient Light Sensor (ALS) implementation using Digispark Attiny85-based microcontroller development board). But I have no device in Gnome. So after connecting it to PC, it seems to work. I have in monitor-sensor:
Light changed: 35,172799 (lux) Light changed: 43,124899 (lux) Light changed: 42,666199 (lux) Light changed: 25,232699 (lux)
When I stop iio-sensor-proxy (systemd unit) and start manually by /usr/libexec/iio-sensor-proxy -v, I see:
** (iio-sensor-proxy:68956): DEBUG: 23:34:00.635: Starting iio-sensor-proxy version 3.5 (iio-sensor-proxy:68956): GLib-GIO-DEBUG: 23:34:00.636: Using cross-namespace EXTERNAL authentication (this will deadlock if server is GDBus < 2.73.3) ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.660: Found IIO buffer ALS at /sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0 ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.660: Found device /sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0 of type ambient light sensor at IIO Buffer Light sensor ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.662: Found associated trigger at /sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/trigger0 ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Already enabled sensor /sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0/scan_elements/in_intensity_both_en ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Already enabled sensor /sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0/scan_elements/in_illuminance_en ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Already enabled sensor /sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0/scan_elements/in_timestamp_en ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Trying to read 'in_intensity_both_scale' (name) from dir '/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0' ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Failed to read float from /sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0/in_intensity_both_scale: Не удалось открыть файл «/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0/in_intensity_both_scale»: Нет такого файла или каталога ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Trying to read 'in_intensity_scale' (generic name) from dir '/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0' ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Trying to read 'in_intensity_both_offset' (name) from dir '/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0' ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Failed to read float from /sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0/in_intensity_both_offset: Не удалось открыть файл «/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0/in_intensity_both_offset»: Нет такого файла или каталога ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Trying to read 'in_intensity_offset' (generic name) from dir '/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0' ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Got type for in_intensity_both: is signed: 1, bytes: 4, bits_used: 32, shift: 0, mask: 0x4294967295, be: 0 ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Trying to read 'in_illuminance_scale' (name) from dir '/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0' ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Trying to read 'in_illuminance_offset' (name) from dir '/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0' ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Got type for in_illuminance: is signed: 1, bytes: 4, bits_used: 32, shift: 0, mask: 0x4294967295, be: 0 ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Trying to read 'in_timestamp_scale' (name) from dir '/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0' ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Failed to read float from /sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0/in_timestamp_scale: Не удалось открыть файл «/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0/in_timestamp_scale»: Нет такого файла или каталога ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Trying to read 'in_scale' (generic name) from dir '/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0' ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Failed to read float from non-existent /sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0/in_scale ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Trying to read 'in_timestamp_offset' (name) from dir '/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0' ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Failed to read float from /sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0/in_timestamp_offset: Не удалось открыть файл «/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0/in_timestamp_offset»: Нет такого файла или каталога ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Trying to read 'in_offset' (generic name) from dir '/sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0' ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Failed to read float from non-existent /sys/devices/pci0000:00/0000:00:1c.3/0000:2a:00.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:16C0:27D9.000A/HID-SENSOR-200041.2.auto/iio:device0/in_offset ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Got type for in_timestamp: is signed: 1, bytes: 8, bits_used: 64, shift: 0, mask: 0x18446744073709551615, be: 0 ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Built channel array for in_intensity_both: index: 0, is signed: 1, bytes: 4, bits_used: 32, shift: 0, mask: 0x4294967295, be: 0 ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Built channel array for in_illuminance: index: 1, is signed: 1, bytes: 4, bits_used: 32, shift: 0, mask: 0x4294967295, be: 0 ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.671: Built channel array for in_timestamp: index: 5, is signed: 1, bytes: 8, bits_used: 64, shift: 0, mask: 0x18446744073709551615, be: 0 ** (iio-sensor-proxy:68956): DEBUG: 23:34:00.707: Handling driver refcounting method 'ClaimAccelerometer' for accelerometer device
Seems that I need a rule for device to be seen in Gnome.
My OS is Bluefin-DX.