If you run homebridge as non-root user - add it to GPIO group: (in case in logs: bcm2835_init: Unable to open /dev/gpiomem: Permission denied) sudo adduser homebridge gpio 3 - Installing the plugin sudo npm install -g homebridge-dht 4 - Configure the Plugin. A minimal config.json looks like this

I get a permission denied error: bcm2835_init: Unable to open /dev/mem: Permission denied /home/pi/laundry/node_modules/rpio/lib/rpio.js:104 return bindfunc(optarg); ^ Error: Could not initialize bcm2835 GPIO library at bindcall (/home/pi/laundry/node_modules/rpio/lib/rpio.js:104:9) at EventEmitter.rpio.init (/home/pi/laundry/node_modules/rpio/lib/rpio.js:460:2) at rpio.open (/home/pi/laundry/node_modules/rpio/lib/rpio.js:470:18) at initIndicator (/home/pi/laundry/index.js:139:8)

Cannot open /dev/ttyS0: Permission denied I would like to be able to use serial port terminal, or equivalent with Xubuntu so I can use my kpc3 packet terminal, connect to the com port on the back of my computer. 2019-02-21 2019-10-14 $ ls -l /dev/drm0 crw----- 1 root wheel 87, 0 Dec 11 20:39 /dev/drm0 $ more /var/log/Xorg.0.log [ 46.215] (WW) checkDevMem: failed to open /dev/xf86 and /dev/mem (Operation not permitted) Check that you have set 'machdep.allowaperture=1' in /etc/sysctl.conf and reboot your machine refer to xf86(4) for details [ 46.215] linear framebuffer access unavailable [ 46.221] (--) Using wscons driver on wiringPiSetup: Unable to open /dev/mem or /dev/gpiomem: Permission denied. Aborting your program because if it can not access the GPIO hardware then it most certianly won’t work Try running with sudo? sudo usermod -a -G gpio user_name % change the owner and group respectively sudo chown root.gpio /dev/gpiomem sudo chmod g+rw /dev/gpiomem.

Bcm2835_init unable to open dev mem permission denied

at bindcall (/home/pi/) etc. However it boots up fine running sudo node server.js. There is no reason for an ordinary application to access /dev/mem, i.e. the physical RAM, since applications are running in virtual memory! If you change the permission of /dev/mem to enable that (you should not), you will open a huge security hole in your system. Only trusted root processes should access /dev/mem. See mem(4) Unable to open communications to configuration daemon: Permission denied Unable to connect to configuration database.

bcm2835_init: Unable to open /dev/mem: Permission denied /home/pi/Documents/javaScript/greenhouse/node_modules/rpi-dht-sensor/main.js:7 return binding.readSpec(type, pin); ^ TypeError: Failed to initialize at DHT.read (/home/pi/Documents/javaScript/greenhouse/node_modules/rpi-dht-sensor/main.js:7:18) at dhtRead (/home/pi/Documents/javaScript/greenhouse/index.js:7:23) at Object. (/home/pi/Documents/javaScript/greenhouse/index.js:15:1) at Module._compile (internal/modules/cjs/loader

Kivy is an Open source Python library for rapid development of applications. MAX6675 SPI Temperature Sensor 2016-05-02: A script to read the temperature from a MAX6675 connected to a K-type thermocouple.

I'm trying to read physical memory as a non-root user using /dev/mem. Checking the permissions of /dev/mem: ~/w/e/setup ls -lha /dev/ | grep mem crw-r----- 1 root kmem 1, 1 Oct 15 09:29 mem From my understanding, a member of the kmem group should be allowed to read from /dev/mem. I check my group memberships:

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I check my group memberships: C.Appl wrote:I got the message: wiringPiSetup: Unable to open /dev/mem or /dev/gpiomem: Permission denied. So i changed the permissions and now it works.
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But, on combining this code with my code that imports cv2, I am unable to import it. Since opencv cannot work as a root user.

2019-02-21 2019-10-14 $ ls -l /dev/drm0 crw----- 1 root wheel 87, 0 Dec 11 20:39 /dev/drm0 $ more /var/log/Xorg.0.log [ 46.215] (WW) checkDevMem: failed to open /dev/xf86 and /dev/mem (Operation not permitted) Check that you have set 'machdep.allowaperture=1' in /etc/sysctl.conf and reboot your machine refer to xf86(4) for details [ 46.215] linear framebuffer access unavailable [ 46.221] (--) Using wscons driver on wiringPiSetup: Unable to open /dev/mem or /dev/gpiomem: Permission denied.
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Opening /dev/gpiomem device file and calling mmap() function will map the GPIO registers' memory map area to the user's pointer. This driver is available in below's Ubuntu kernel versions: ODROID-C2: 3.14.79-105 kernel version or later

If the library runs with any other effective UID (ie not root), then bcm2835_init() will attempt to open /dev/gpiomem, and, if successful, will only permit GPIO operations. Read about 'Raspberry Pi and /dev/mem access' on element14.com.

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Putting sudo in front of sox will not help you since I am pretty sure the error message "Failed to open /dev/mem" comes from pi_fm_rds. And that is still started without sudo. You are actually executing two commands. sox is the first, and pi_fm_rds the second. You are sending the output of the first command to the second (via the pipe |).

2015年8月27日 bcm2835_init: Unable to open /dev/mem: Permission denied したがって/dev/ memにアクセス権限がないとGPIOが使えない。 Eclipseで Feb 14, 2017 dmidecode accesses extremely low-level data from the physical host system, and you probably just can't run it from within a Docker container. 2014年6月15日 Raspberry PiでGPIOにアクセスするプログラムを実行しようとするエラーになる. $ ruby sample1.rb bcm2835_init: Unable to open /dev/mem: Oct 27, 2014 My startup logs include: UUID: Unable to open /dev/mem: Permission denied Has anyone determined if this error is a problem? Thanks 2019年4月7日 toFixed(2) + '%'); setTimeout(dhtRead, 5000); } dhtRead();. 这是整个错误 bcm2835_init: Unable to open /dev/mem: Permission denied Mar 11, 2018 [Solved] bcm2835_init: Unable to open /dev/mem: Permission..