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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.

这是整个错误 bcm2835_init: Unable to open /dev/mem: Permission denied  bcm2835_init: Unable to open /dev/mem: Permission denied (helloWorld-pi-liter:23350): Gtk-WARNING **: cannot open display: localhost:  I noticed that bcm2835 release 1.52 solved the problem allowing to use /dev/memgpio instead of /dev/men, thus not requiring root access. 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 : Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.Provide details and share your research! But avoid ….

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Примечание ко всем примерам кода из документации. $ ls -l /dev/gpiomem crw-rw---- 1 root gpio 244, 0 Dec 12 14:35 /dev/gpiomem. If not, execute those commands: $ sudo chown root.gpio /dev/gpiomem $ sudo chmod g+rw /dev/gpiomem Give hardware permissions with udev rules. You may still encounter permission issues with hardware on your Raspberry Pi for various reasons. Re: bcm2835_init: Unable to open /dev/gpiomem: Permission de Fri Aug 26, 2016 3:21 pm Ok so, for some reason I had to redo the command make modules_install again and it seems to be working now. [root@rhel ~]# su - manmohan Last login: Wed Jan 24 14:34:36 UTC 2018 on pts/0 [manmohan@rhel ~]$ ls -l /root ls: cannot open directory /root: Permission denied [manmohan@rhel ~]$ cd /root -bash: cd: /root: Permission denied [manmohan@rhel ~]$ id uid=501(manmohan) gid=501(manmohan) groups=501(manmohan) [manmohan@rhel ~]$ 第一，lsusb之后，蓝牙适配器是存在的；第二，hcitool scan也是可以搜索到我的蓝牙设备的；第三，ls /dev/rf*, 没有返回任何关于rfcomm*， 只有/dev/rfkill; 第四， 当我绑定蓝牙设备物理地址的时候，sudo rfcomm bind 0 00:04:3E:4B:32:40， 返回一个错误，RFCOMM TTY support not available. (EE) parse_vt_settings: Cannot open /dev/tty0 (Permission denied) This is other fail in running Xorg on linux kernel: archlinux 4.20.10-arch1-1-ARCH Solved by chmod 666 /dev/tty0.

2019-10-14

2018-01-25 Try running with sudo? wiringPiSetup: Unable to open /dev/mem or /dev/gpiomem: Permission denied. Giving access to /dev/mem is a huge security hole.

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Last reply 22/05/2020 While trying to open /dev/mtd2 for read/write access: Permission denied.

I think I have a messed up version of Jessie. I have been using Jessie from when it was first available (as announced last year sometime on the Raspberry forum).
Thomas ahrens eide bailly

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 Did the mem test and found out one of my 512MB sticks (had 2) failed.

bcm2835_init: Unable to open /dev/mem: Permission denied.
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Because HiPi::BCM2835 accesses the SOC registers directly via /dev/mem, it must run with the necessary root privileges to gain access to /dev/mem. This means you must start your Perl script with root privileges using sudo or from the root account. This always presents a security risk.

$ ruby sample1.rb bcm2835_init: Unable to open /dev/mem: Permission denied /var/lib/gems/1.9.1/gems/pi_piper-1.3.2/lib/pi_piper/spi.rb:89: [BUG] Segmentation fault ruby 1.9.3p194 (2012-04-20 revision 35410) [arm-linux-eabihf] bcm2835_init: Unable to open /dev/mem: Permission denied. Примечание ко всем примерам кода из документации.