BOARD_DESIGN.md

ESP32 Board Design

Table of Contents

• ESP Pictures
• Technical Information about ESP32
• Advanced Troubleshooting and Programming
• Encoder
• Display
• LED Signaling
• Case / Enclosure

ESP Pictures

Technical Information about ESP32

• Data Sheet

• Strapping Pins and Boot Mode Selection

  • USB Serial Monitor - PuTTY on Serial Port at 115200 baud
    • This will report which boot mode is selected based on strapping Pins

• Multicore

Advanced Troubleshooting and Programming

• ESP Tool (Requires Python)
  • Once Python is installed open an elevated command prompt and navigate to the extracted files
  • To get board information:
    • py espefuse.py --port COM3 summary
  • Flash Information:
    • py esptool.py flash_id
  • You’ll find you have missing packages. Use the structure below to install them
    • python -m pip install pyserial

Encoders

• Encoder Library

  • This library is able to attach inputs to interrupt pins. This prevents constant polling.

• Wiring / Pins

  

Display

• SSD1106 based OLED (128 x 64 pixels)

  

  

  • Available in White or Blue
  • Library: U8g2lib
    • I2C address: 0x3C
    • #define OLED_RESET -1
  • Wiring / Pins
    • SCL GPIO 22 (hardware I2C SCL)
    • SDA GPIO 21 (hardware I2C SDA)

  

  • Usage
    • Custom Images
    • Custom Font
    • Custom Shapes / Drawing

LED Signaling

• FastLED Library

  • FastLED Wiki
    • Controlling LEDS
    • Pixel Reference
    • HSV Colors
    • Gradient Color Palettes
  • Technical
    • Clockless RMT ESP32
    • Temporal Dithering
    • High Performance Math
    • Experimental Hardware SPI

• Wiring / Pins for RMT Hardware Accelerated use on ESP32. Allows up to 8 unique strands.

  • Fast Pin ESP32

  

Case / Enclosure

• ABS Plastic boxes with board standoffs
• Polycarbonate Plastic boxes without board standoffs
• Sloping Console
• Anti-slip Feet 3M SJ5001
• Stand-Offs / Screws for OLED/PCB
• 3D Printed Custom Box
  • Sam will design and print. Can utilize online printer shops for bulk manufacturing.