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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...
Exercise 1: Go through the tutorial on https://mydevices.com/cayenne/docs/cayenne mqtt api/#cayenne mqtt api manually publishing subscribing in section `Manually...
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...
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 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 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....
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...
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...
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...
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...
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...
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...
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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 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...
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...
Sensors for IoT devices ...
Introduction to Internet of Things (IoT) Session 1: Introduction to IoT and Python Isaac Armah Mensah University of Cape Coast, Ghana Introduction of Lecturers...
A WEB cam in MicroPython Introduction In order to provide a WEB cam in MicroPython we need The camera hardware with enough RAM memory to store the camera images...
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...
Hardware Options Introduction The virtual world example consists of 2 distinct parts The sensor part and its readout which is implemented on a micro controller...
Setting up and IoT Session 2: Micropython andHardware accessUli RaichFormally CERN, Geneva, Switzerland The WeMos D1 mini CPU card ESP8266 cost: 2....
Exercises Session on Python Session on Sensor and Actuator Access Session on the Virtual World Comments
Integrating the camera driver into MicroPython. Programming the esp32 cam processor The esp32 cam does not come with a serial USB interface as many other ESP32 processor...
Devices needed The Raspberry Pi The Raspberry Pi features SoC: Broadcom BCM2837 CPU: Quad Core ARM Cortex A53, 1.2 GHz RAM: 1GB LPDDR2 (900 MHz)...
Tutorial Description Abstract While most of the tutorials of the 2018 AFNOG conference deal with Internet related problems this particular tutorial on IoT (Internet...
The DS18B20 1 wire temperature sensor The DS18B20 is a high precision temperature sensor using Maxim`s 1 wire protocol. Again a driver is already available in the...
The DHT11 temperature and humidity sensor The DHT11 is a temperature and humidity sensor using its own private protocol. Fortunately a driver is again available in...
A Custom MicroPython binary Introduction We have already seen how to create a custom MicroPython binary when we integrated all the modules needed for the WEB server...
Creating the virtual world The virtual world we want to create will show the ultra sonic sensor and the paper we hold in front of it. The paper color in the virtual...
Communicating over MQTT MQTT, the Message Queuing Telemetry Transport protocol is the communication protocol of choice in many IoT applications. It uses a broker receiving...
Combining the Real World with the Virtual World Before we have seen how to read out the color sensor and and how to determine the distance between the colored paper...
The Color Sensor Color Sensor Types The color sensor is used to show the paper moving in front of the distance sensor in the right color. Just like in case of the...
Connecting to Cayenne A Micropython class connecting to WiFi and subscribing to the myDevices MQTT broker Since every sensor node needs to first connect to WiFi and...
The Buzzer shield The Hardware The buzzer shield implements a passive buzzer with frequencies up to 1 kHz 3 kHz. By default it uses data line D5 corresponding to...
The BMP180 barometric pressure and temperature sensor This board uses a Bosch BMP180 I2C barometric pressure and temperature sensor. The driver version of the BMP...
Accessing sensors and actuators Session 2 of the AFNOG tutorialon IoT sensorsUli Raich The sensors and actuators For our experiment we need 3 different devices:...
Accessing the Raspberry Pi from the PC In order to access the Raspberry Pi the easiest method is ssh. On a Linux Laptop everything is already installed for you and...
Accessing Micro Python on the IoT Node Introduction Once micro Python is running on the node we must be able to upload Python programs on the node and execute them...
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