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 use of Python language pySerial library on Raspberry Pi or RPi both 3rd and 4th generation to connect to the serial port. It can be done in 2 ways, the first is to use hardware like ET-CONV10/RS232 HAT that has been written in the book and with the use of a USB port connected to a converter to be a serial communication port (USB to Serial Port) as shown in Figure 1. This article uses the second method to run pySerial to check how many serial ports are connected and what are their names as an example in Figure 8.
This article discusses the previously recommended compiling (build) and use of MicroPython for esp32-C3 microcontrollers. The procedure is the same as for compiling for esp32-s2. In addition, we have solved the issue of RS232-to-USB from the board using CH340 to external pin using CP2102 instead and connecting the display module with OLED as Figure 1.
This article discusses compiling and using MicroPython for an esp32-s2 microcontroller based on the TTGO ESP32-S2 V1.1 or TTGO ESP32-S2-WOOR V1.1 board with a Type-C USB port and supports operation via CH340C and OTG by using a dip switch as shown in Figure 1, enabling MicroPython to be used because the chip program uses the CH340’s circuit programming and Python programming requires a port that works like OTG
