Many thanks for you quick reply. Could you tell me how to grant vmware permission to read /dev/mem without compromising system security? I'm asking because workstation can be very slow to start, can lock the desktop if I try to load 2 copies (or player and workstation simultaneously) that requires me to ssh in and kill vmware-vmx.

the sensors connected to GPIOs. There seems to be missing permissions: bcm2835_init: Unable to open /dev/gpiomem: Permission denied I have tried to run with the --device /dev/gpiomem and also --privileged attribute, without luck. How should this be solved?

The API needs access to bcm2835 library, and I get the following when trying to run node server.js. bcm2835_init: Unable to open /dev/mem: Permission denied /home/pi/Documents/node_modules/rpio/lib/rpio.js:104 return bindfunc(optarg); bcm2835_init: Unable to open /dev/mem: Permission denied Failed to open /dev/mem, try checking permissions. Failed to map the physical GPIO registers into the virtual memory space. Many thanks for you quick reply.

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so to make node-red-contrib-dht-sensor work i ha d to do this : uninstall old bcm2835.1.38 (simply remove directory install and make new release 1.52 uninstall node-red-contrib-dht-sensor using : bcm2835_init: Unable to open /dev/mem: Permission denied. pi@Collatinus ~/Development/Cprog $ sudo ./pi-liter-test. When I combine them in one program this happends: pi@Collatinus ~/Development/Cprog $ ./helloWorld-pi-liter. bcm2835_init: Unable to open /dev/mem: Permission denied. When I runn my nodejs program without SUDO i get: bcm2835_init: Unable to open /dev/mem: Permission denied. That's because there is no permission to acces the GPIO, but is there a way to go around that? Because I'm making a website that runs on a raspberry pi 4 that set's some outputs and counts some inputs.

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

That's because there is no permission to acces the GPIO, but is there a way to go around that? Because I'm making a website that runs on a raspberry pi 4 that set's some outputs and counts some inputs. bcm2835_init: Unable to open /dev/mem: Permission denied /home/pi/Documents/node_modules/rpio/lib/rpio.js:104 return bindfunc (optarg); Error: Could not initialize bcm2835 library. at bindcall (/home/pi/) etc.

When I runn my nodejs program without SUDO i get: bcm2835_init: Unable to open /dev/mem: Permission denied. That's because there is no permission to acces the GPIO, but is there a way to go around that? Because I'm making a website that runs on a raspberry pi 4 that set's some outputs and counts some inputs.

Usage is very simple. Just open /dev/gpiomem device file instead of /dev/mem. 2014-09-17 · Do not just run ./test because initializing bcm2835 requires elevated permission. If you do that you will get the following error: pi@raspberryfai ~/rpi-mems-sensor $ ./test bcm2835_init: Unable to open /dev/mem: Permission denied Pastebin.com is the number one paste tool since 2002. Pastebin is a website where you can store text online for a set period of time. Hi Arjan and thanks for your answer.

Current required from for each stacked ADC PI on a PI3. Last reply 18/05 the sensors connected to GPIOs.
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So i changed the permissions and now it works.

This driver is available in below's Ubuntu kernel versions: ODROID-C2: 3.14.79-105 kernel version or later Did the mem test and found out one of my 512MB sticks (had 2) failed. 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.
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Did the mem test and found out one of my 512MB sticks (had 2) failed. 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.

There was an uncaught exception 0|mm | TypeError: Failed to initialize 0|mm | at DHT.read (/home/pi/MagicMirror/mod bcm2835_init: Unable to open /dev/mem: Permission denied /home/pi/node_modules/rpio/lib/rpio.js:104 return bindfunc(optarg); ^ Error: Could not initialize bcm2835 GPIO library` I am unsure if these errors are directly related or what to do from here since I've tinkered with permission … bcm2835_init: Unable to open /dev/mem: Permission denied /home/pi/Documents/node_modules/rpio/lib/rpio.js:104 return bindfunc (optarg); Error: Could not initialize bcm2835 library. 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.

QEMU: qemu-system-aarch64: can't open backing store /dev/hugepages/ for guest RAM: Permission denied This basically means that you’re using the amazing -mem-path /dev/hugepages , and that QEMU running as an unprivileged user can’t write there…

bcm2835_init: Unable to open /dev/mem: Permission denied /home/pi/Documents/node_modules/rpio/lib/rpio.js:104 return bindfunc(optarg); bcm2835_init: Unable to open /dev/mem: Permission denied Failed to open /dev/mem, try checking permissions. Failed to map the physical GPIO registers into the virtual memory space.

No idea where that suggestion came from, but if it’s openHAB code, somebody should remove it and properly document how to access GPIO.