The article discusses the use of the LittleFS library and introduces a library developed for use with the esp32 microcontroller, which includes a plugin for the Arduino IDE for uploading files to the microcontroller’s ROM. Make it convenient to load data to store and run. For this reason, if programmers find it difficult to transcode HTML/CSS/JavaScript to be a string manually and switching to uploading files to esp32 and reading the web files directly to use will be something that will require training to use LittleFS as a reliable library.
In the previous article, programming to implement queue-based data structures was introduced. In this article, we introduce programming to manage another type of data structure which has different storage and management methods called BST tree or Binary Search Tree, as shown in Figure 1, which is a structure that can be applied to data collection with attributes in which the data in the left branch is less than itself and the right branch is greater than itself or the opposite, i.e. the left branch has a greater value and the right branch is less. It enables searching for data in cases where the tree is balanced on the left and right in the BST structure, saving half the time or number of search times per round of available data, e.g. 100 data sets in the first round if it is not the information you are looking for will be left with a choice to find from the left or right branches which the selection causes the information of the other side is not considered or cut off approximately half. However, if the Binary Search Tree is out of balance, the search speed is not much different from the sequential search.
In this article, we use Python that works on either a Python 3 or MicroPython interpreter to store the data, adding information ,searching for information as an example of further development.
This article discusses the implementation of a servo motor module using the ESP32’s GPIO that outputs a digital PWM signal or Pulse Width Modulation or an LEDC (LED Control) which enables frequency band generation or adjust the proportion of status 1 and 0 in 1 waveform with a frequency of 50Hz using the experimental board as shown in Figure 1.
This article is based on the article programming a client/server for a weather station over a wireless network or WiFi to modify from reading data from sensors to joystick shield (Arduino Joystick Shield) so that it has become a wireless game controller using MicroPython and an ESP32 microcontroller as shown in Figure 1. It is possible to control the movement of objects in the display via a ST7735 TFT screen connected to another ESP32. It will be found that the Python implementation of MicroPython is applicable in this example. And with an easy-to-write language and code that can be modified without recompiling and uploading, it’s easy to write prototype code for further development at a higher speed.
This article discusses the use of the ESP32’s GPIO to output digital signals such as PWM or Pulse Width Modulation or LEDC (LED Control), which enables frequency generation or adjusts the proportion of 1 and 0 states in 1 waveform. Thus, in the absence of the DAC, we can still adjust the average voltage at that pin as needed and it can be applied to control servo motors as well. Therefore, in this article, we will learn how to use PWM and apply it to frequency transmission instead of DAC (from the previous article) and LED dimming using the experimental board as shown in Figure 1.
This article discusses the use of the ESP32’s GPIO as an analog signal output through the 8-bit DAC module of the ESP32 microcontroller. In this article, we use Cosine wave generation to output the analog signal of the microcontroller through the speaker and show the waveform obtained from the oscilloscope display. The experimental board is still used as shown in Figure 1.
