Iot on s7n / sebastian steiner

Raspberry Pi RFID RC522 wiring

Sun, 22 Feb 2015 20:34:00 +0000

getting rfid rc522 to work with raspberry pi 2

Image from https://raspberrypi.stackexchange.com/questions/37021/.

Running Overclocked Raspberry Pi 2 B With FreeBSD

Fri, 20 Feb 2015 10:11:00 +0000

Running Overclocked Raspberry Pi 2 B With FreeBSD

Overclocking options: arm=1000MHz, core=500MHz, sdram=500MHz, overvolt=2

FreeBSD reboot 10 seconds after a panic

Thu, 19 Feb 2015 11:34:00 +0000

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echo 'kernel.panic = 10' >> /etc/sysctl.conf

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// kern.coredump=0
// kern.corefile=/dev/null
// background_fsck="NO" # on zfs ;)

Overclocking Raspberry Pi B+

Thu, 19 Feb 2015 10:47:00 +0000

SoC (Broadcom BCM2835 ARMv6) thermal range is up to +85 °C.

Orginal /boot/config.txt:

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disable_commandline_tags=1
gpu_mem=32
device_tree=rpi.dtb
device_tree_address=0x100
kernel=uboot.img

My additional options (stable system):

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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.

Fix FreeBSD 10.1 Boot Problem On Raspberry Pi B+ (error 19)

Thu, 19 Feb 2015 10:22:00 +0000

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

ESP 8266

Mon, 16 Feb 2015 21:03:45 +0000

The ESP8266 is a low price SoC with WLAN / UART / SPI interface (ardoino alternative).

https://www.mikrocontroller.net/articles/ESP8266