Raspberry Pi 2 IoT: Thingspeak & DHT22 Sensor

Introduction This project uses a Raspberry Pi 2 to collect temperature and humidity data from a DHT22 sensor, which is then uploaded to the ThingSpeak Internet of Things platform to be displayed in real-time. This write-up is primarily intended to serve as documentation for the project, but may also be of use as a tutorial for others. It assumes a beginner skill level and that you are running the Raspberry ...

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Windows 10 IoT Plant Monitoring System

Project Intro This project is aimed to create a plant monitoring and watering system. The main task is to control the servo, relay and collect the soil humidity data from the plants. Huge amount of the sensors use analog signal as output but the Raspberry Pi doesn’t have an analog-to-digital converter. To solve this problem, I used an outer ADC module and an Arduino gateway because they have built in ADC. W ...

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Temp. and Humidity Sensor with a CR2032 for over 1 year!

Intro This article will discuss and demonstrate how to build a remote Temperature and Humidity sensor based on a Whisper Node and a DHT11 (worst sensor ever, I know)., capable of running for well over a year on a single CR2032 coin-cell. The remote node will be configured to transmit data every 60 seconds to another Whisper Node, acting as a gateway/base station and located 100 meters away. The data will be ...

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Facial Recognition & Identification on Raspberry Pi

Introduction Facial recognition and identification will soon be playing a major role in our every day lives. The technology opens up a whole new world of possibilities, and applies to almost every aspect of our lives. Use cases of facial recognition/identification include security systems, authentication systems, personalised smart homes, and home care assistants. What Will We Build? This tutorial will help ...

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Amazon DRS Weight Sensor

Overview The design of my device revolves around making it easy to replenish products you need without even knowing it is happening. My approach is centered on one fact -all replenishable products have weight. Therefore, this device can work with any product. The ability to manufacture one device that can work with any product is extremely important. The Amazon Dash button is a good example of this concept. ...

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Getting Started with the BrickPi

Introduction If you’re familiar with Lego Mindstorms, then you are probably aware of all the cool projects that you can make and the educational value of such an easy-to-use robotics platform. Enter the BrickPi. [caption id="attachment_10592" align="aligncenter" width="600"] Bare BrickPi board[/caption] The BrickPi is a RasbperryPi add-on that lets you control Lego Mindstorm parts. The BrickPi stacks on top ...

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Raspberry Pi SPI and I2C Tutorial

Introduction There are many peripherals that can be added to a microprocessor over the I2C and SPI serial interfaces. These include atmospheric sensors, EEPROMS, and several types of display. [caption id="attachment_10572" align="aligncenter" width="600"] The Pi Wedge helps access the I2C and SPI signals.[/caption] This tutorial will walk you through getting the I2C and SPI interfaces of your Raspberry Pi w ...

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Wireless Remote Sensing with Wemos D1 mini, Arduino IDE, Raspberry Pi and lighttpd web server

For a long time now I’ve wanted wireless temperature sensors scattered around the house and garden reporting their temperatures regularly to a central server. It’s not something I really need, but something nice to have. I’d originally planned to do it with a RasPiO Duino or Arduino nano and inexpensive NRF24L01 radio boards. Albert @winkleink Hickey, a friend of mine, who also runs the Egham Jam put me ont ...

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Capacitive Touch Pad with Raspberry Pi

Raspberry Pi is an ARM architecture processor based board designed for electronic engineers and hobbyists. The PI is one of most trusted project development platforms out there now. With higher processor speed and 1 GB RAM, the PI can be used for many high profile projects like Image processing and Internet of Things. [caption id="attachment_10475" align="aligncenter" width="615"] Raspberry Pi Capacitive To ...

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DHT22 Temperature/RH Sensor on the RaspberryPi

The DHT22 is a low cost, single wire sensor which measures temperature and relative humidity. I started out just playing around with this thing, just wiring it to a Pi to see it working. But I got sucked in much deeper into thinking about how it worked and assessing its limitations. Output Data Stream The DHT22 produces a serial stream of data. In other words the sensor has just one "wire" over which it sen ...

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