Difference between revisions of "Tutorial Digital IO"

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* you can read in the status of a GPIO  
 
* you can read in the status of a GPIO  
 
* you can connect a switch or a push-button and read its status into a variable
 
* you can connect a switch or a push-button and read its status into a variable
 +
 +
== Related Components ==
 +
The components are related to the [[LMUBox]]. For more components, see the [[Hardware List]. Many of the pages on actuators and sensor include additional examples.
 +
 +
=== Microcontroller ===
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* [[ESP32 Web Kit]] with integrated OLED Display from Heltec
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* [[ESP8266 ESP-12F]] NodeMCU Module from AZDelivery
 +
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=== Actuators ===
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* [[LED]]s in different colors to connect externally, many in  the
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* [[RGB LED]] multi-color LED, 2x in  the
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* [[LED Ring NeoPixel]],
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* [[Piezo Speaker]], 2x in the
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* [[Speaker]], 2x in the
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* [[SG90 Servo]] Micro Servo Motor, 3x in the
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* [[Stepper Motor and ULN2003]] 28BYJ-48 ULN2003 5V Stepper Motor + ULN2003 Driver Board; 2x in the
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* [[IRF520 Module]] Power MOSFET switching module ('electronic relay')
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 +
=== Sensors (and physical controllers) ===
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* [[push button]], several in the
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* [[Switch]],
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* [[PIR Sensor]] passive infrared motion sensor,
  
 
= Instructional Videos =
 
= Instructional Videos =

Revision as of 13:11, 31 August 2020

Digital Input and Output with MicroPyton and ESP32/ESP8266

In this part of the tutorial, we explain how to control digital outputs and how to read digital inputs using MicroPyton on ESP32/ESP8266. This includes switching the state of the GPIOs (general purpose input output) and also how to create a pulse width modulation output for changing the brightness of an LED or for controlling a servo.

Success criteria

  • you can set a GPIO pin to on or off from the python prompt
  • you can write a loop to blink an external LED
  • you can use pulse width modulation to control the intensity of an LED
  • you can use pulse width modulation to control a servo that can be directly driven from the ESP Module
  • you can read in the status of a GPIO
  • you can connect a switch or a push-button and read its status into a variable

Related Components

The components are related to the LMUBox. For more components, see the [[Hardware List]. Many of the pages on actuators and sensor include additional examples.

Microcontroller

Actuators

Sensors (and physical controllers)

Instructional Videos

The videos are a first test... the ones marked with ** will be replaced over the next months with new versions.

Digital Output: Adding an external LED to the controller

In this video on youtube (30:30) we show how to connect an LED and how to control it from MicroPython: https://youtu.be/0KGgYsEZcZM


Digital Output: Connectin an external LED (old version using WebREPL **)

In this video on youtube (16:54) we show how to connect an LED and how to control it from MicroPython: https://youtu.be/G6HZ1etMRbM


PWM Output: connecting a servo (old version using WebREPL **)

In this video on youtube (14:40) we explain the concept of pulse width modulation (PWM) and how to program it in MicrpPython. We show how to use PWM to controll a servo: https://youtu.be/_4bXk8JjQSk

PWM Output: creating sounds

In this video on youtube (23:56) we explain how to create a sound on a digital output pin. We have two versions, one with the sleep function and one with pulse width modulation (PWM) in MicrpPython. We also show how to add an PAM8403_Stereo_Amplifier: https://youtu.be/HPQMvL1SP_c


Digital Input - connecting a switch and a push-button **

In this video on youtube (30:31) we explain how to read in digital inputs in MicrpPython. We show how to connect a switch and a push-button and also explain the basic concept of a pull-up resistor: https://youtu.be/va1beT6sxLs

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