Ondrej Hejda ondrejh

ondrejh / ctrltab.y

Created November 16, 2021 14:28

Script emulating CTRL+TAB pressing every 10 seconds.

	#!/usr/bin/python3

	from pynput.keyboard import Key, Controller
	from time import sleep


	if __name__ == "__main__":

	keyboard = Controller()

ondrejh / skluzavka.ino

Created May 25, 2021 12:43

Arduino based water pump timer with signalisation and safety float switch.

	/**
	* Casovy spinac pro cerpadlo na skluzavku do bazenu. Cerpadlo se zapne na 15s po stisku tlacitka. Kontrolka sviti. Poslednich 5s blika.
	* Pokud je malo vody (plovakovy spinac), cerpadlo se nezapne a kontrolka blika rychle.
	*/

	#define CAS_ZAPNUTI 15000 //ms
	#define CAS_BLIKANI 5000 //ms
	#define CAS_CHYBY 1000 //ms

	#define BLIKANI_POMALE 500 //ms

ondrejh / lamp_install.md

Created December 24, 2020 07:38

LAMP installation

sudo apt update
sudo apt install apache2

ondrejh / rainbow.ino

Created November 29, 2020 07:59

Slowly changing color light strip using arduino and neopixels

	/**
	* Slowly changing color light strip using arduino and neopixels. Suitable for mood lights.
	* recent usage: sauna pool downlight, advent candlestick ..
	*/

	#include <Adafruit_NeoPixel.h>
	#ifdef __AVR__
	#include <avr/power.h>
	#endif

ondrejh / servo_limiter.ino

Last active May 2, 2020 15:10

Servo limiter - limits servo signal to 25% (HW - Arduino Pro Mini)

	/**
	* Program reads servo signal on "input", changes its aplitude by 25% and sends it to "output".
	* It is used for limiting RC car power - for kids.
	*/

	// input and output pin
	const int input = 2;
	const int output = 3;

	const int led = LED_BUILTIN;

ondrejh / pull.py

Last active May 30, 2019 19:52

first succesfull sdm120 module communication

	#!/usr/bin/env python3

	# http://www.eastrongroup.com/data/uploads/Eastron_SDM120-Modbus_user_manual_2016_V2_6.pdf
	# http://www.eastroneurope.com/media/_system/tech_specs/3914/SDM120%20PROTOCOL.pdf

	from serial import *
	from time import sleep


	PORT_NAME = "/dev/ttyUSB0"

ondrejh / mountnfs.sh

Created January 29, 2014 10:43

Bash script: Wakeup and mount NFS server.

	#!/bin/bash

	#
	# This script should do:
	#
	# 1) test if nfs folder is mounted and exit 0 if yes
	# 2) try to mount it and exit 0 if success
	# 3) try to wake the server if not possible to mount
	# 4) wait while its not woked (pinging)
	# 5) try againt 2-4 several times