IoT For Makers

" 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...

last updated 2020.04.17 : update for ESP32 I like MCUs like arduino uno, esp8266, esp32. But I prefer single-board computers like Raspberry Pi and Jetson Nano. This is because a single-board computer can install Linux and use great tools like OpenCV. However, many makers are using the Arduino-based mcu and often produce amazing results. The RGB LED drive library for the ESP8266 and ESP32, which will be introduced in this post, also demonstrates great features. I received an RGB LED matrix shield for ESP8266 from Electrodragon a few days ago. After receiving this product, I also looked at how to drive the RGB LED matrix using the ESP8266. <Electrodragon ESP8266 RGB LED sheild> This product has the same pin configuration as the shiled product made by Brian Lough. Brian Lough's products are available at https://www.tindie.com/products/brianlough/d1-mini-matrix-shield/ for 14$. And Electrodragon products are available for purchase for $ 3.4 at https://www.electrodr...