getting rfid rc522 to work with raspberry pi 2 Image from https://raspberrypi.stackexchange.com/questions/37021/.

Expansion Header Pinout Images from http://pi4j.com/pins/model-2b-rev1.html.

Running Overclocked Raspberry Pi 2 B With FreeBSD Overclocking options: arm=1000MHz, core=500MHz, sdram=500MHz, overvolt=2

1 2 3 4 5 # plugin your sd card # open a terminal as root/sudo diskutil list // identify the /dev/diskNUMBER of the sd card diskutil unmountDisk /dev/diskNUMBER sudo dd bs=1m if=FreeBSD-11.0-CURRENT-arm-armv6-RPI-B-20150217-r278908.img of=/dev/diskNUMBER How to build your own freebsd raspberry pi (arm6) image: https://github.com/kientzle/crochet-freebsd https://github.com/daveish/freebsd-arm-tools Update 2018-08 FreeBSD has supported the Raspberry Pi 2 since Q2 2015. https://wiki.freebsd.org/FreeBSD/arm/Raspberry%20Pi http://www.raspbsd.org/

1 echo 'kernel.panic = 10' >> /etc/sysctl.conf 1 2 3 // kern.coredump=0 // kern.corefile=/dev/null // background_fsck="NO" # on zfs ;)

SoC (Broadcom BCM2835 ARMv6) thermal range is up to +85 °C. Orginal /boot/config.txt: 1 2 3 4 5 disable_commandline_tags=1 gpu_mem=32 device_tree=rpi.dtb device_tree_address=0x100 kernel=uboot.img My additional options (stable system): 1 2 3 4 5 6 7 8 9 10 11 12 arm_freq=900 arm_freq_min=700 gpu_freq=250 gpu_freq_min=250 core_freq=450 core_freq_min=250 sdram_freq=500 sdram_freq_min=400 over_voltage=0 over_voltage_min=0 initial_turbo=15 temp_limit=75 Based on http://elinux.org/RPiconfig#Overclocking_options.

Your process consume more memory than there is physical RAM (e.g compelling on a raspberry pi)? In that case you need swap space. 1 2 3 4 5 6 7 dd if=/dev/zero of=/swapfile bs=1m count=512 chmod 0600 /swapfile echo 'md99 none swap sw,file=/swapfile 0 0' >> /etc/fstab reboot swapon -aLq swapinfo swapctl -lh Based on: https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/adding-swap-space.html http://www.cyberciti.biz/faq/create-a-freebsd-swap-file/

1 echo 'hw.bcm2835.sdhci.hs="0"' >> /boot/loader.conf