Posted inArduino Arduino C/C++ Cortex-M0 Cortex-M3 Cortex-M4 English esp32 esp8266 STM32

[EN] SPI Bus

November 5, 2021

This article discusses the SPI bus functionality of the Arduino framework for use with the STM32F030F4P6, STM32F103C8, STM32F401, esp8266 and esp32. The operation of this bus requires at least 3 intercommunication cables: SCLK, MISO. and MOSI for transmitting the clock signal between the sender and the receiver. It serves to receive information from the sender. and used for sending information to the recipient.

From the use of 3 signal lines, it is found that data can be transmitted and received simultaneously. This is different from I2C bus communication that uses only one SDA cable to communicate. At the same communication speed, the SPI bus will receive and transmit data without waiting for an idle line, while I2C will have to wait for idle. With this in mind, SPI can send/receive data faster.

In addition, SPI uses a method to select the destination to communicate by instructing the endpoint to know by sending a signal to the SS pin of the terminal. Therefore, when connecting to multiple devices, SPI requires a larger number of pins to operate, while I2C uses device identification to communicate with each other by still using only one SDA cable, which saves more pins.

Posted inArduino Arduino C/C++ English esp32 esp8266 STM32

[EN] I2C Bus/Wire.h

November 4, 2021

This article describes the methods of Wire.h, a class for communicating with devices over an I2C bus that uses two signal wires called SDA and SCL to transmit data between them. We have quite a number of articles about this type of communication and used as the main bus to develop devices by yourself and run through the bus, for example, articles on using esp8266 to connect to Arduino Uno or using esp8266 with stm32f030f4p6, etc.

Posted inArduino Arduino C/C++ esp32 esp8266 Thai

[TH] LittleFS Filesystem

November 1, 2021

บทความกล่าวถึงการใช้ไลบรารี LittleFS และแนะนำไลบรารีที่ถูกพัฒนาเพื่อใช้กับไมโครคอนโทรเลอร์ esp32 ซึ่งมีส่วนเสริม (plugin) ของ Arduino IDE สำหรับอัพโหลดไฟล์ไปเก็บในรอมของไมโครคอนโทรลเลอร์ ทำให้สะดวกต่อการโหลดข้อมูลไปเก็บและเรียกใช้งาน ด้วยเหตุนี้ถ้าผู้เขียนโปรแกรมรู้สึกยุ่งยากกับการแปลงโค้ด HTML/CSS/JavaScript ให้เป็นสตริงด้วยตนเอง และเปลี่ยนมาเป็นอัพโหลดไฟล์ไปเก็บใน esp32 แล้วอ่านไฟล์เว็บมาใช้งานโดยตรงจะเป็นสิ่งที่จะต้องฝึกฝนใช้งานเจ้า LittleFS ไว้เป็นไลบรารีคู่ใจกันเลยทีเดียว

Posted inArduino Arduino C/C++ English esp32 esp8266 sensor STM32

[EN] Arduino : DHT Sensor

October 22, 2021

This article describes how Adafruit’s DHT Sensor library is compatible with all Arduino-compatible architectures, making it easier to deploy DHT sensors for humidity and temperature readings across multiple platforms. This article has tested with ESP32, ESP8266, Arduino UNO and stm32f103c and found that it can be used without modifying the code in the working part or having to modify the source code to make it compatible with the platform.

(Figure. 1 dht22 and BluePill)
Posted inArduino Arduino C/C++ English esp8266 STM32

[EN] Arduino : RTC DS1302

October 20, 2021

From the article programming Python on Micropython to use RTC number DS1302, this time, we change the programming language to C++ for Arduino by using STM32F030F4P6 Cortex-M0, esp8266 and Arduino Mega as a worker instead of ESP32 as shown in Figures 1, 2 and 6 by show the report on the RS232 port to display the date and time as shown in Figure 4.

(Figure. 1 DS1302 experiment with STM32F30F4_6.)
Posted inArduino Arduino C/C++ English esp32 game MicroPython sensor

[EN] Arduino: JoyStick Shield

October 17, 2021

This article is a guideline on using GamePad/Joystick with Arduino Uno or Arduino Mega because it is a module designed as a shield of both boards. When assembled, you will get 1 cute gamepad as shown in Figure 1. The article explains more about the information of the connection between each device and the GPIO with examples of use. The content about the joystick module can be read from the previous article.

(Figure. 1 Joystick Shield)
Posted inArduino Arduino C/C++ English esp32 game MicroPython Python sensor

[EN] Arduino: Joystick Module

October 16, 2021

This article is programming to write a program to use the joystick module as shown in Figure 1, in which the module can tell the X-axis movement, Y-axis movement, and the state of pressing the switch on the joystick. An example of this module is to use the esp32 board using C++ to connect to the GPIO using the commands mentioned in this article.

(Figure. 1 esp32 with joystick
Posted inArduino Arduino C/C++ English STM32

[EN] Arduino: STM32F030F4P6

October 12, 2021

This article is about using a 32-bit microcontroller board under the Cortex-M0 architecture RISC that is economical but the performance is considerably better than the 8-bit board. However, our team has created an alternative for those who are interested in reading. The article starts with the content about the features of microcontrollers, board installation for Arduino IDE to know and example code to toggle LED, traffic through the USART communication port and Prime numbering test to see the processing speed in an iterative loop.

(Figure. 1 STM32F030F4P6)
Posted inArduino Arduino C/C++ English

[EN] Arduino:ET-BASE AVR EASY4809

October 11, 2021

This article is the use of ETT‘s ET-BASE AVR EASU4809 board based on Microchip’s ATMEGA4809 microcontroller, which is used as an Arduino board running at 20MHz with 40KB FLASH ROM, 256 bytes EEPROM, 6KB of RAM, and a 10-bit ADC, which is said to have significantly higher features than the ATmega 368P used with the Arduino Uno or Arduino Nano. In addition, the board selected this time has more features than basic Arduino boards which you can read further from the web page of the board.

(Figure. 1 ET-BASE AVR EASY4809)