IoT For Makers

Do you know TetrisClock? TetrisClock is a WiFi clock made of falling tetris blocks. Runs on an ESP32 with an RGB LED Matrix. <TetrisClock on the RGB LED Matrix by Brian Lough> I'm a big fan of RGB LED matrix and I wrote many posts about RGB LED Matrix in my blog . I like to display the TetrisClock screen using OpenCV on the Raspberry Pi to the RGB LED Matrix. However, the TetrisClock shown in the figure above works on the Arduino family of ESP32 MCUs. I also posted an article implementing TetrisClock on ESP32 at https://iot-for-maker.blogspot.com/2020/04/led-9-rgb-led-matrix-drive-with-esp-32.html . But I wanted to implement this beautiful clock in Raspberry Pi, so I googled hard, but couldn't find any good examples. Eventually, I decided to analyze the code written in C language and implement it in Python and OpenCV. In my blog, which mainly introduces OpenCV, I introduced 2 articles to implement Tetris characters. Creating TetrisClock using OpenCV #1 Creating Tet...

" ESP32  is a series of low-cost, low-power  system on a chip   microcontrollers  with integrated  Wi-Fi  and dual-mode  Bluetooth . The ESP32 series employs a  Tensilica   Xtensa LX6  microprocessor in both dual-core and  single-core  variations and includes built-in antenna switches, RF  balun , power amplifier, low-noise receive amplifier, filters, and power-management modules. ESP32 is created and developed by  Espressif Systems , a Shanghai-based Chinese company, and is manufactured by  TSMC  using their 40 nm process. [2]  It is a successor to the  ESP8266  microcontroller. " <from https://en.wikipedia.org/wiki/ESP32 > ESP32 is a Dual Core MCU The predecessor of ESP32, the ESP8266 has a builtin processor. However due to multitasking involved in updating the WiFi stack, most of the applications use a separate micro-controller for data processing, interfacing sensors ...

Today, I received new RGB Matrix HATs from HongKong. Henner Zeller introduces this product on his github . <New RGB Matrix HAT from https://www.electrodragon.com/product/rgb-matrix-panel-drive-board-raspberry-pi/ > I immediately assembled this product on Raspberry Pi. Electrodragon Vs. Adafruit Electrodragon Adafruit Chain 3 1 Price ($) 3 24.95 Logic Level Shifter 74HC245 AHCT245 No. of Logic Level Shifter 4 2 Onboard 5V interface Need soldering Y The price of Electrodragon is only one-eighth the price of Adafruit, but it supports three chains. Thus, one HAT can be used to connect more RGB LED matrices. If you don't have a problem with the features, of course, we recommend Electrodragon products. The Electrodragon HAT does not have a 5V input / output terminal to supply power to the LEDs. However, this is not a problem at all, because in most...