This week, we had our first Wednesday Evening Training of 2019! We started with a good old IoT "klusavond" in which we discussed several topics:
Luc Slutter, on of our IoT experts, gave us an excellent introduction into home automation with Domoticz. Domoticz is a compact home automation system that allows you to operate a multitude of devices, sensors and smart devices. You can control Domoticz via various devices, such as your laptop, tablet and smartphone. The user environment is web-based, and can be installed on different devices.
Luc showed us the features, technology and gave us a demonstration and technology walkthrough of his own home built automation solution.
Great stuff! We will definitely continue with Domoticz (and similar platforms) this year.
Reading values from sensors in your IoT device (like the Raspberry Pi of Arduino) can be done by, roughly speaking, constantly interrogating them or reacting on changed measured values. The first approach requires a program loop in which all sensors are queried. This is rather inefficient and, depending on the implementation, can also give untimely measurements. The program may not react fast enough to changes in measurements. An alternative to this approach is an interrupt implementation in which the hardware detects voltage changes in the hardware pins (to which the sensors are linked), stops processing the main program and runs a specially created interrupt routine. This is a more efficient and accurate approach which also yields neater code.
This evening I gave an introduction and demo of an interrupt implementation using the Arduino. The demo consisted of a button being pressed, generating a value change on one on the Arduino pins, causing an interrupt routine to be fired in my C program loaded in the Arduino. The interrupt routine then activates another pin which turns on a LED. My C program kept the status of the LED (on/off) and, dependent of this status, could switch the LED on and off. A very simple example, clearly demonstrating the interrupt approach.
We also had an inspiring brainstorm on IoT topics we should address in 2019, led by our IoT champion (and Young professional of 2018!) Aishwarya Dhall. In 2019 there is still a lot to experiment and learn in the field of IoT. Here we are thinking of experimenting with various new sensors, home automation, integration of IoT devices and (cloud) platforms and experimenting with new applications.
We'll continue our IoT workshop on January 23th. Make sure you don't miss my posts on this!
On Arduino:
Arduino Interrupts Tutorial (explanations, 2 demo's/labs): https://www.youtube.com/watch?v=QtyOiTw0oQc
My YouTube playlist on Arduino: https://www.youtube.com/playlist?list=PLSiMhBs48YvV86iiXFJY-BRxOsP2A2pnH
10 Awesome Beginner Arduino Projects: https://create.arduino.cc/projecthub/RoyTobby/10-awesome-beginner-arduino-projects-78a6a6
Arduino project - Adaptive LED Morse Code Decoder and Timer Interrupt: https://create.arduino.cc/projecthub/shjin/adaptive-led-morse-code-decoder-and-timer-interrupt-8d18a7
Arduino - Multitasking (e.g. interrupts): https://learn.adafruit.com/multi-tasking-the-arduino-part-2/overview
- Domoticz home automation
- Implementing interrupts with the Arduino
- Brainstorm on this years IoT topics in the Wednesday Evening Training
Domoticz home automation
Luc Slutter, on of our IoT experts, gave us an excellent introduction into home automation with Domoticz. Domoticz is a compact home automation system that allows you to operate a multitude of devices, sensors and smart devices. You can control Domoticz via various devices, such as your laptop, tablet and smartphone. The user environment is web-based, and can be installed on different devices.
Luc showed us the features, technology and gave us a demonstration and technology walkthrough of his own home built automation solution.
Great stuff! We will definitely continue with Domoticz (and similar platforms) this year.
Implementing interrupts with the Arduino
Reading values from sensors in your IoT device (like the Raspberry Pi of Arduino) can be done by, roughly speaking, constantly interrogating them or reacting on changed measured values. The first approach requires a program loop in which all sensors are queried. This is rather inefficient and, depending on the implementation, can also give untimely measurements. The program may not react fast enough to changes in measurements. An alternative to this approach is an interrupt implementation in which the hardware detects voltage changes in the hardware pins (to which the sensors are linked), stops processing the main program and runs a specially created interrupt routine. This is a more efficient and accurate approach which also yields neater code.
This evening I gave an introduction and demo of an interrupt implementation using the Arduino. The demo consisted of a button being pressed, generating a value change on one on the Arduino pins, causing an interrupt routine to be fired in my C program loaded in the Arduino. The interrupt routine then activates another pin which turns on a LED. My C program kept the status of the LED (on/off) and, dependent of this status, could switch the LED on and off. A very simple example, clearly demonstrating the interrupt approach.
Brainstorm on this years IoT topics in the Wednesday Evening Training
We also had an inspiring brainstorm on IoT topics we should address in 2019, led by our IoT champion (and Young professional of 2018!) Aishwarya Dhall. In 2019 there is still a lot to experiment and learn in the field of IoT. Here we are thinking of experimenting with various new sensors, home automation, integration of IoT devices and (cloud) platforms and experimenting with new applications.
We'll continue our IoT workshop on January 23th. Make sure you don't miss my posts on this!
Further reading
Do you want to read more on the topics in this post or play around with the technology? Here are some links…Arduino Interrupts Tutorial (explanations, 2 demo's/labs): https://www.youtube.com/watch?v=QtyOiTw0oQc
My YouTube playlist on Arduino: https://www.youtube.com/playlist?list=PLSiMhBs48YvV86iiXFJY-BRxOsP2A2pnH
10 Awesome Beginner Arduino Projects: https://create.arduino.cc/projecthub/RoyTobby/10-awesome-beginner-arduino-projects-78a6a6
Arduino project - Adaptive LED Morse Code Decoder and Timer Interrupt: https://create.arduino.cc/projecthub/shjin/adaptive-led-morse-code-decoder-and-timer-interrupt-8d18a7
Arduino - Multitasking (e.g. interrupts): https://learn.adafruit.com/multi-tasking-the-arduino-part-2/overview
Arduino Interrupts: https://www.instructables.com/id/Arduino-Interrupts
Arduino Playgrounds - Interrupts: http://playground.arduino.cc/code/interrupts
On Domoticz:
Domoticz official site: http://www.domoticz.com
My YouTube playlist on Domoticz: https://www.youtube.com/playlist?list=PLSiMhBs48YvWmAEqHS_w_l9Suj4lT05VX
(Dutch) Controle over je apparaten met Domoticz en Raspberry Pi: https://computertotaal.nl/artikelen/internet-thuis/controle-over-je-apparaten-met-domoticz-en-raspberry-pi
Domoticz official site: http://www.domoticz.com
My YouTube playlist on Domoticz: https://www.youtube.com/playlist?list=PLSiMhBs48YvWmAEqHS_w_l9Suj4lT05VX
(Dutch) Controle over je apparaten met Domoticz en Raspberry Pi: https://computertotaal.nl/artikelen/internet-thuis/controle-over-je-apparaten-met-domoticz-en-raspberry-pi
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