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Blinking patterns of Philips Hue Dimmer Switch V1 (RWL021)
I currently own two Zigbee-based dimmer switches from Philipps Hue (the old V1 version). I was always wondering what the different blinking patterns of the LED indicated. Understanding them was not too straightforward. So here is a quick summary: Blinking orange The device is currently in pairing mode, waiting to be paired. A hard-reset andContinue reading “Blinking patterns of Philips Hue Dimmer Switch V1 (RWL021)”
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How to flash Sonoff TX Ultimate with ESPHome
In today’s blog post, we’re focusing on the Sonoff TX Ultimate Smart Touch Wall Switch – a concealed installation switch with features that go beyond the basics. It is equipped with a large touch area, 28 LEDs for various lighting purposes, a speaker, vibration feedback, and gesture support. While these features offer great flexibility, flashingContinue reading “How to flash Sonoff TX Ultimate with ESPHome”
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On energy consumption of different wireless protocols and modulations
Introduction As time moves on, more and more wireless communication protocols and modulations are being developed. They all have their own area of application and some suit certain applications more than others. In this post, we want to look at different factors that influence energy consumption of some of the widely used protocols. Particularly, weContinue reading “On energy consumption of different wireless protocols and modulations”
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Wireless Communication Technologies for IoT Projects
Exploring Wi-Fi, Bluetooth, Zigbee, and LoRa Introduction In the realm of embedded systems, Arduino, Raspberry Pi, and the Internet of Things (IoT) have revolutionized the way we interact with our surroundings. With a plethora of sensors and devices at our disposal, it’s crucial to understand the various wireless communication technologies available for IoT projects. InContinue reading “Wireless Communication Technologies for IoT Projects”
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What platform should I use for my IoT project?
There is a large choice of platforms, embedded microcontrollers and breakout boards available for prototyping your projects. I want to show you some aspects, that might help you to device what platform you should choose. First of all, answer the following questions for yourself: Do I need WiFi connection, or is some other wireless technologyContinue reading “What platform should I use for my IoT project?”
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Subscribe to The Things Network (TTN) using MQTT
The Things Network (TTN) is an open platform for creating a worldwide LoRaWAN network. You can install your own LoRa gateways and register them on TTN so that other TTN users can use your gateways. If you have devices or sensors publishing data over LoRa, you can receive this data using an MQTT broker fromContinue reading “Subscribe to The Things Network (TTN) using MQTT”
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SDR: Receive Wireless Signals using Software-Defined Radios
Introduction What is an SDR? Different types of SDR SDRs can be bought in different sizes, with different features and, of course, with different prices. Cheapest: RTL-SDR The cheapest option is RTL-SDR USB stick. It is based on an RTL2832 chip, which was commonly used as a DVB-T receiver. However, some smart guy found outContinue reading “SDR: Receive Wireless Signals using Software-Defined Radios”
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LoRaWAN – What is it? How does it work?
Introduction By now, every IoT enthusiast might have heard of LoRa, or LoRaWAN. Many companies use it, many cities use it, and many hobbyists have built numerous projects with it. But how does it work? Why is LoRa so “low-power”? How can LoRa reach such a long distance? I will discuss all of that inContinue reading “LoRaWAN – What is it? How does it work?”
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