1 Technophile

The goal  is to act as a gateway between 433Mhz sensors and a MQTT broker or between the MQTT broker and 433Mhz actuators, It enables to: receive MQTT data from a topic and send RF 433Mhz signal corresponding to the received MQTT data  publish MQTT data to a different topic related to received 433Mhz signal  It can be an interesting part in an home automation system so as to interface sensors and actuators (wall sockets) with software like openhab . List of compatible sensors here The interest of putting this gateway to an ESP8266 and not on a raspberry pi is to be able to manage security actions at gateway level (power on a siren, cut power to certain devices) following RF data received by sensors without being dependent to the PI for security related actions. [EDIT] all infos are now centralized into  the github repository  take a look at it you will find up to date info about OpenMQTTGateway You need: Software: Mosquitto Arduino IDE latest versio...

I needed to have a way to know the state of my garage door.  Several solutions where at my disposal so as to do that; hack the existing control central to be able to know the position of the door and send the status wireless to my 433Mhz to MQTT gateway add an external sensor  and send the status wireless to my  433Mhz to MQTT gateway One of these two options with a cable After some investigations on the control central of my garage door I have deducted that there is no "closed" "open" contact, indeed the stop of the motor seems to be detected by the fact that it is "forcing" maybe by detecting some over current. The sensor that I have at the bottom of this garage door is in case there is an obstacle in the course of the door. Sending a stop to the motor. Unfortunately I can't use this due to the fact it is not actionned at the end of the course. Safety sensor of the garage door (cannot be hacked for state recognition) I had to ...

I have built an external sensor so as to monitor temperature, air humidity, soil humidity of my garden and the battery voltage. The requirements was: waterproof long battery life, the atmega328p run at 8mhz with minimal components and functions under 10€ wireless (433Mhz) with good range (2 walls to cross and 10 meters) Here is the final view: And some reports from OpenHab displaying the sensor data: Air humidity Soil humidity Air temperature We can of course imagine to use these values to control a water pump. Now let's see hpw to build this. Bill of material The sensors is based on atmega328p (3€),  a 433 Mhz transmitter (1,5€) , a DHT11 (1€) or a DHT22 temperature and humidity sensor, a soil moisture sensor  (1,6€), an electrical box (1€)  a 433 mhz antenna (0,18€) DIP socket adaptor for the ATmega (1€) an electronic prototype printed circuit board (0,5€) a recycled  tube At total we are around 10€ ...

Here is the functions that can be adressed with the architecture described here , all these functions are integrated and can be linked together if necessary Alarm system Presence detection by PIR and door/window sensors Automatic detection of house mode (presence/out) by wifi and geolocalisation When a presence is detected start a siren and send an email Smoke detector make the home automation siren start and send an email Camera motion control (extra added later on) Presence simulation Energy monitoring Instant consumption monitoring Dayly consumption monitoring Voltage measurement History charts Media Squeezebox integration Play/stop change internet radio Adjust volume Home automation Switch ON/OFF plugs remotely with an android application or a web site Monitor temperature and humidity of rooms Weather forecast (integrated from yahoo data) Text to speech, when someone wake up give the weather forecast for example History charts of t...

The goal of the Arduino 433toMQTTto433 is to act as a gateway between 433Mhz sensors and a MQTT broker or between the MQTT broker and 433Mhz actuators, It enables to: receive MQTT data from a topic and send RF 433Mhz signal corresponding to the received MQTT data  publish MQTT data to a different topic related to received 433Mhz signal  It can be an interesting part in an home automation system so as to interface sensors and actuators with software like openhab. The interest of putting this gateway to an arduino and not on a raspberry pi is to be able to manage security actions at arduino level (power on a siren, cut power to certain devices) following RF data received by sensors without being dependent to the PI for security related actions. [EDIT] all infos are now centralized into  the github repository  take a look at it you will find up to date info about OpenMQTTGateway You need: Arduino UNO  W5100 Ethernet shield  433Mhz Receiver XD RF ...

Since several months I worked on setting up an home automation system for my house. The goal was to have an open system, with an important part of DIY work and second hand components so as to satisfy my curiosity about these new technologies. In this first article I will expose the architecture of the system , the bill of material and the software involved. These devices are maybe not compliant with your country regulations and norms, it is your responsability to verify this compliance. Bill of material: 3 * 433Mhz presence sensor 5€ = 15€ 3 * 433Mhz door sensor 4€ = 12€ 1 * 433Mhz smoke detector  8€ = 8€ 1 * arduino UNO clone = 5€ 1 * arduino ethernet shield W5100 = 6€ 1 * raspberry pi 2 or 3 = 40€ 1 * sdcard 8gb = 5€ 1 * 433Mhz receiver and  1 * 433Mhz transmitter   = 1.50€ 1 * siren 3€ 1 * 9V wall transformer (second hand) 1€ 1 * kit of 3 switch plug = 20€ 1 * DHT11 temperature sensor = 1.50€ 1 * old computer speakers = 5€ Leds and resistors <3€...

OpenHAB  is an home automation software that enables you to control your home, to get the feedback of your sensors and do various scenarios and rules. It's a very good software when you have some IT knowledge, mainly because with the rules you can develop with Domain Specific Language built on Xbase and enhance the base abilities of the software (that are already powerful with the base :-). Nervertheless I'm not here to talk about openHAB but much to say how to add jail into fail2ban configured to fit to openHAB log. Fail2ban enables to scan log files and Ban IP that fit on some rules. In our case the goal is to scan the logs of openhab to check if there is too much authentication failure and if it is the case ban the corresponding IP. Tested with: fail2ban 0.9.3 (doesn't work with 0.8.x) openhab 1.7.x, 1.8.x https Prerequisites: Enable authentication on openhab.cfg security:option=ON or security:option=EXTERNAL and set some users/pwd to users.cfg ...