Sven Bock sven-bock

sven-bock / gist:78b86896dfdcd9cd323d297fe01f3c51

Created April 30, 2018 12:56

Get temperature of your Raspberry Pi

/opt/vc/bin/vcgencmd measure_temp

sven-bock / gist:491ca1f9d110e8493b278496c25dd57e

Created April 27, 2018 13:50

Backup and restore SD card image with compression

	#Backup SD card
	#Verify that sdb is your SD card or change it.
	sudo dd bs=4M if=/dev/sdb \| gzip > ~/roomba_`date +%d%m%y`.gz
	#Wait until the prompt return. It really takes some time to write 32GB and compress it!

	#Restore SD card from image
	#Verify that sdb is your SD card or change it.
	gzip -dc ~/roomba_XXXXX.gz \| sudo dd bs=4M of=/dev/sdb
	#Wait until the prompt return. It really takes some time to write 32GB and decompress it!

sven-bock / gist:1eaff06a990e19ec264afb0e2acb75b1

Last active April 27, 2018 12:08

WiFi - command line - ubuntu 16.04

sven-bock / split_pdf.bash

Created March 21, 2018 21:09

Split PDF in single page PDFs

	#!/bin/bash
	# Splits the PDF in single pages PDFs which are saved in a subfolder called extracted and the page name.
	# If the pages does already exist, it will increment the page number by one, until the filename is not occupied.

	#sudo apt-get install pdftk
	#chmod +x split_pdf.bash
	#./split_pdf.bash source.pdf

	PDFFILE=$1
	echo "File: "$PDFFILE

sven-bock / gist:f7856974c89e24a4969f292d96aa1173

Last active April 30, 2018 12:54

Enable SSH on Raspberry Pi on SD card

	+ Plugin SD card that contains the Raspbian OS into your computer
	+ Find the partition that is called "boot"
	+ Create a file there called ssh

	REMARK: Only works for raspbian!

sven-bock / gpio_control.py

Created March 15, 2018 15:38

Example: MQTT and GPIO control on Raspberry Pi

	#!/usr/bin/env python
	import paho.mqtt.client as mqtt
	import RPi.GPIO as GPIO
	import time
	import signal
	TOPIC_1= "lab_switch"
	HOST="localhost"
	USER="openhab"
	class MQTTGPIO():
	def __init__(self):

sven-bock / gist:56f4e6548a9d9d24312bf573a1056b91

Last active February 28, 2019 16:00

Setting a fixed port (with a simlink) to a USB device (udev/rules)

	#Example:

	#get some info with:
	udevadm info -a -n /dev/ttyUSB0 \| grep serial
	udevadm info -a -n /dev/ttyUSB0 \| grep idProduct
	udevadm info -a -n /dev/ttyUSB0 \| grep idVendor
	#or
	udevadm info -a -n /dev/ttyUSB0 \| grep -E 'idVendor\|idProduct\|serial'

sven-bock / gist:3d0517a8a3f41799ebb5863917317496

Last active January 30, 2018 16:22

Quickly replace all "strings" in files recursively

	# Replace OLD with the string you want to replace, and NEW with the string you want to insert

	find ./ -type f -exec sed -i -e 's/OLD:/NEW:/g' {} \;

	grep -rl 'OLD' . \| xargs sed -i 's/OLD/NEW/g'

sven-bock / gist:52959b5ab36f4758712b6ab09d8cf42f

Last active February 16, 2018 09:34

Useful apps

	# Quickly create an android app for IoT :
	https://www.blynk.cc/

	#ROS stack and library for roomba and create:
	https://github.com/AutonomyLab/create_autonomy
	https://github.com/AutonomyLab/libcreate/blob/master/include/create/types.h

sven-bock / gist:2860bdc7f45b8d7195a9d0b88a87bce5

Created January 26, 2018 16:11

Run some executable as a background process

	# This can be quite useful to run some process on the server,
	# as it will not listen to the hangup signal of the terminal
	# and will not terminate the process, if you close the terminal.
	# In addition all output is appended in the log file
	nohup /usr/bin/python3.4 /abspath/someFile.py 2>&1 \| /usr/bin/tee -a /abspath/log.txt &

	#Example:

	#get some info with:
	udevadm info -a -n /dev/ttyUSB0 \| grep serial
	udevadm info -a -n /dev/ttyUSB0 \| grep idProduct
	udevadm info -a -n /dev/ttyUSB0 \| grep idVendor
	#or
	udevadm info -a -n /dev/ttyUSB0 \| grep -E 'idVendor\|idProduct\|serial'