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Exercises First exercise session: A bit of programming Connect your ESP32 to the PC using the micro USB cable and start thonny. Locate the shell window and check...
A small project In this small project, we want to read the analogue sensor (slider) and display the result on the rgb LED ring. To do this, we will divide the possible...
The rgb LED chain The LED employed on the LoLin RGB LED card is very different from the one we used on the CPU card. In fact, the card uses cascadable, addressable...
Analogue Signals Up to now, we only treated digital signals in output mode (LED) and in input mode (pushbutton). Sensors often produce analogue signal levels, however...
Hardware access, the General Purpose Input Output (GPIO) pins. Running the programs on the PC Up to now, all programs we have written can be executed on the ESP...
Python modules and timing Python libraries are arranged as modules, containing a number of functions and/or classes. These modules must be imported before being...
First Python programs Introduction It is not possible to go through Python programming in just an hour. We will therefore learn only those features that are absolutely...
The African School of Fundamental Physics Introduction Courses on experimental physics are very scarce in Africa. When talking to African professors, I always hear...
Lecture notes Summary: Introduction (this page) Communicating with the ESP32 First Python Programs Modules and Timing Hardware...
Communicating with MicroPython First steps You do not know the Python? No problem! We will go through some of the basics. Python is a very powerful, modern programming...
This WEB is dedicated to the AFNOG Workshop and in particular to the tutorial session on IOT (Internet of things) devices. afnog.org The AFNOG tutorial on IoT...
AFNOG 2021: 2 lectures on IoT The lecture slides for download: Here the original slides written with LibreOffice. You should be able to open these also with a modern...
The WeMos D1 mini and its sensor and actuator shields Introduction We have seen that the ESP01 can be programmed with micro Python and that there are add on sensor...
Installing the picoweb server The description of picoweb on its git repository explains it as follows: picoweb is a `micro` web micro framework (thus, `pico framework...
Bringing up the MicroWebSrv2 server on an ESP32. The source code of MicroWebSrv2 is available . We get at the code using git: git clone https://github.com/jczic/MicroWebSrv...
Hands on exercises for the workshop on IoT Session 1 Introduction to IoT and Python Session 2 Hardware access and Micropython Session 3 MQTT and Cayenne...
What is IoT? A talk given during the AFNOG 2019 conference Abstract: Everybody is talking about IoT, the Internet of Things. However, few are the people who deeply...
Workshop Slides Lecture Slides Session 1: Introduction to IoT and Python Session2: Hardware access and Micropython Session 3: MQTT and Cayenne Session...
Introduction to Internet of Things (IoT) Session 1: Introduction to IoT and Python Isaac Armah Mensah University of Cape Coast, Ghana Introduction of Lecturers...
Setting up and IoT Session 4: Sending real measurement data to Cayenne and receiving commands and executing them on the hardware Uli Raich formally CERN, Geneva, Switzerland...
What is IoT? An IntroductionUli Raich (uli.raich #64;gmail.com)Formally CERN, Geneva, Switzerland What is IoT? Answer: IoT is the Internet of ThingsBut...
The IoT Node and its Processor As already indicated in the introduction an IoT node consists of an Internet enabled processor with interfaces to external sensor and...
Exercises for session1: Introduction to IoT and Python Exercise 1: Write a program that calculates and prints the Fibonacci numbers up to 20 iterations. The...
The Raspberry Pi as an IoT node Running Cayenne on the Raspberry Pi is certainly the simplest way to get your sensors connected to Cayenne. All you need to do is downloading...
Exercise 1: Go through the tutorial on https://mydevices.com/cayenne/docs/cayenne mqtt api/#cayenne mqtt api manually publishing subscribing in section `Manually...
Setting up an IoT Session 3: MQTT and Cayenne Uli RaichFormally CERN, Geneva, Switzerland The Network Layers The WeMos D1 mini has a built in WiFi interfaceIn order...
The WS2812B RGB LED shield On this board we have the addressable WS2812B RGB LED. This LED is used in many LED chains. The board uses D2 (GPIO 4) as data line (or...
The SHT30 I2C temperature and humidity sensor The is a temperature and humidity sensor interfaced through the I2C protocol. A micro Python driver can be found at https...
The LED matrix shield This shield provides a 8x8 led matrix where each led can be individually be switched on and off and its intensity be controlled. The program...
The OLED shield This shield features a 64x48 pixel OLED display. We would normally not connect it as IoT sensor but it comes it handy to display the state of out WeMos...
The DS1307 Real Time Clock and data logger This shield features a battery backed up Dallas real time clock and an SD card socket which can receive micro SD cards....
A simple push button switch The simplest WeMosD1 shield is just features a single push button. It uses the WeMos` ESP8266 D3 pin which corresponds to GPIO 0. Testing...
Using the Atmel AVR Arduino as IoT node Introduction Together with the Raspberry Pi the Arduino is one of the most popular platform in embedded systems. The family...
The double or triple base board and prototyping boards A base board holding 2 or 3 WeMos D1 shields may be used if a great number of shields is connected to the WeMos...
Exercises for session 3: MQTT and Cayenne Exercise 1: Install mosquitto on your machine. On Ubuntu Linux this can very easily be accomplished with apt. On Windows...
Exercises for session 2: Hardware access and Micropython Exercise 1: Connect to Micropython using a terminal emulator. Import the machine package: import machine...
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The IoT network The Internet Iot stands for the Internet of Things . It consists of a collection of nodes communicating with each other over the Internet. Each node...
Exercises on Sensor and Actuator access Introduction Once we are comfortable with Python basics we can try to access the sensors and actuators connected to our Raspberry...
Reading the Color Sensor and the Virtual World Session 3 of the AFNOG tutorial on IoT sensorsUli Raich How to create the Virtual World We have seen the image of...
Sensors for IoT devices ...
Reading the Color Sensor and creating the virtual world Introduction Reading the color sensor is rather tricky but we are lucky to find a ready made module that contains...
Exercises on Python Before being able to start programming sensors and actuators we need to know a programming language giving us access to the sensor and actuator...
The Slides Introduction to Python Accessing the Sensors and Actuators VPython and the Virtual World Comments
The Ultrasonic Distance Sensor HC SR04 In order to measure the distance of the colored paper sheet from the sensors we use the HC SR04 ultra sonic distance sensor...
RGB LEDs Introduction When construction the virtual world demo we will use two different types of sensors an RGB color sensor giving us the color of a paper...
AFNOG Web Preferences The following settings are web preferences of the AFNOG web. These preferences override the site level preferences in . and...

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