Tag: MicroPython

[EN] Using the DHT22/DHT11 Temperature and Humidity Sensor Module with ESP8266

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This article uses the DHT22 and DHT11 temperature and humidity measurer modules with Python. They are sensor modules that operate using a single signal cable which will save the microcontroller’s port connection. In addition, MicroPython has a library prepared for DHT22 and DHT11 implementation, making it convenient, time-saving and reduce errors that may be caused by manual programming.

There are 3 examples in this article: code17-1 is a normal reading of values, but code17-2 is a loop to read again. By finding the highest and lowest values and display on the LCD module as shown in Figure 8 and example code17-3 showing the average value of temperature and humidity.

Figure 1 Result from code17-1
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[EN] Play the Wav File with ESP32.

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This article applies the ESP32 microcontroller’s DAC and MicroPython to open WAV files, which are audio recording files and exported to the DAC connected to the speakers as shown in Figure 1. The used file is an uncompressed 8-bit mono PCM audio file. And the sample program supports a sampling rate at about 50KHz or at 44100 level.

Figure 1 An example of a board to test the functionality of an article
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[EN] Simple MineSweeper

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This article is an experiment to create a Simple MineSweeper as shown in Figure 1, using an ESP32 microcontroller board with a 1.8″ REDTAB st7735 display. The display resolution is 128×160, the same hardware as Simple Tetris [Part 1, Part 2 and part 3] mentioned earlier, still using MicroPython as the main. The explanation starts step by step from screen generation, randomization, counting, motion control, scrolling the options frame turn off visibility, establishing a relationship between identifying where the bomb is likely to be, picking open and counting points at the end of the game.

Simple MineSweeper is one of the first games we’ve been imitating to study ideas and develop programming techniques since the DOS era and the GUI-based Windows operating system DOS, which was written and worked on the DOS operating system at the time, change the mode to graphics mode to contact with mouse and draw pixels by yourself (It’s the same thing as writing on the ESP32 microcontroller board, but it doesn’t have an operating system to use) So let’s get started.

Figure 1 simple mineSweeper
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[EN] Simple Tetris Ep.3

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The final article on making a Simple Tetris game using MicroPython and an esp32 microcontroller, as written in parts 1 and 2 of the first two articles, is described in the article below. Readers learn to design data structures, drawing the seven types of falling objects and controlling them to move left, right, and rotate. The second article has the object fall from above and keep the object’s position state. And in this article, the falling objects can be stacked along with moving left, right, and rotating the object will check for collisions with previous objects that have fallen before. Also, check if the object falls to the bottom if there are any rows without spaces. If any rows with no spaces are found, they will be deleted. And finally added a section to check the end of the game in case there is no place for objects to fall and move again as in Figure 1, ending our simple game making process.

Figure 1 Our game in this article
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[EN] Simple Tetris Ep.2

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From the previous chapter, we have drawn the background, random objects, object drawing, left and right moving and rotating. In Part 2 of the article, which is the preceding final chapter of the Tetris series, the topic is about creating a backdrop as a grid data structure. If an object falls to the bottom, it converts that object to a table of data as shown in Figure 1, and improves the way the object falls and controls/renders the new object by using a timer without checking for collisions from moving left / right, checking if the falling object overlaps the previous object, rotation and row cutting, which will be discussed in the last article or Simple Tetris Ep.3

Figure 1 The game in this article
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[EN] Simple Tetris Ep.1

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This article introduces how to write a simple Tetris game by displaying it in a grid of 10 widths and a height of 16 as shown in Figure 1. Using esp32 microcontroller board connected to ST7735 display and 8 switches for controlling. Importantly it is written in Python via MicroPython compiled using the st7735_mpy library. In this article, we talk about storing 7 types of objects that fall, to support the display and rotation of objects with moving objects left and right. The controls and logic of the Tetris game will be discussed in the next article.

Figure 1 Sample game in this article
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[EN] How to make the stopwatch?

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From the article Create a clock that displays an analog display through a color display, this time, it has been modified to make it work as a timer or stopwatch by using the ESP32-CAM board connected to the TFT display and using a switch from pin GPIO0 used as a mode switch or program chip when booting the system or supply power to board ESP32-CAM as shown in Figure 1 and programming still uses Python language with MicroPython as always

Figure 1 dCore RED, esp32cam+REDTAB
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[EN] Draw an analog clock using MicroPython.

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The previous article discussed how to improve the display speed by using the double buffer technique. It is applied for the analog clock display as shown in Figure 1. We used Trigonometric calculations to determine the coordinates (x,y) of the tips of the seconds, minutes and hours. Each second operation uses a timer to make the operation closer to real-time than the Loop or Delay.

Figure 1 Result of drawing Analog clock
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[EN] MicroPython : pyb USB_HID/USB_VCP

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This article discusses the use of USB HID capabilities of  STM32F411CEU6 via MicroPython in pyb class, our team was inspired by Dr. Rawat’s article MicroPython for STM32F411 Black Pill: Embedded Programming Style of Siriphokaphirom. So let’s start compiling and uploading the firmware (Read details from Ajarn Dr. Rawat’s article). We use the WeAct STM32F411CEU6 imitation board as shown in Figure 1. When installing MicroPython, there will be a pyb class to use.

Figure 1 Our board
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