I recently started playing with ESP8266 and really like it. So I decided to make a simple OpenSenseMap temperature and pressure ( and humidity with BME280 ) stand-alone device. The idea was to have it run off battery for a long period of time and if needed, to charge it via solar panel(s). I decided […]
Continue ReadingI had some time, so I decided to make an on/off program for my SonOff switch that I want to use to turn on / off the boiler heating at my house ( I use the stronger one, that has support for 16A load). My SonOff is pre-configured already with ESPEasy and rules. What I […]
Continue ReadingIt’s very easy to control Sonoff power switch devices that were updated with ESPEasy firmware. You can practically control them with commands like these ( explained and configured in the previous post ): On action: http://192.168.88.20/control?cmd=event,TurnOn Off action: http://192.168.88.20/control?cmd=event,TurnOff So, to control them from Domoticz, all you need to do is add a virtual […]
Continue ReadingHardware. Okay, to read data from HC-12 to the Raspberry PI is practically very easy :). All you need to do is hook it up and power from RPi. VIN – Connect to RPi 5V (PIN 4) GND – Connect to RPi GND (PIN 6) RX – Connect to RPi GPIO14 (PIN 8, UART0_TXD) TX – Connect to […]
Continue ReadingIn one of the previous articles, I’ve shown you how to read the temperature and send it (very basic format) through HC-12 transmitter. Now we could easily add Light reading and sending it to the reader ( Another HC-12, hooked to Raspberry PI or Arduino ) For that purpose, we will use BH1750 […]
Continue ReadingI’ve recently purchased several sonoff wifi modules. Here’s another one, higher amperage. They usually go with an app that you can use to turn them on / off. However, that’s pretty boring 🙂 I decided to make them run via http interface and also control them from Domoticz via virtual switch. Yes, it’s possible and […]
Continue ReadingIn my previous post, I’ve read temperature reading with BMP180 on Arduino mini cheap clone and sent it over air with HC-12 serial module. Now we’re going to receive it and display it on the OLED screen, that I’ve made a simple test with. To the same Arduino, that we have connected the OLED screen […]
Continue ReadingI’ll be using Arduino Mini Pro cheap clone, that you can find anywhere on E-Bay for $2. Mine looks like this, works on 3.3v and is 8MHz. Make sure to have the correct settings in the Arduino IDE in order to program it. I’m using cheap PL2303 to RS232, which requires specific drivers for Mac […]
Continue ReadingI’ve got several SSD1306 based 0.96″ OLED screens around so I decided to use one of them to show some information that I receive from the HC-12. The first step was to connect it to Arduino Mini/Pro and display a test. My OLED has the following pins / markings on it ( I hope you can […]
Continue ReadingHC-12 is an interesting device. It operates on 433 MHz and I think will be perfect for a sensor network. You can read very detailed info here, I will not go deep into details. First, you need to configure it. For that purpose, I use very simple PL2303 USB to RS232 converter. If you use Mac […]
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