ericklein / badge

Electronic badge for conferences

badge

Purpose

Badge is a fun way to display pertinent information to someone at an event. It is designed to replace the borrow paper "about" stickers or badges you get at events and spark a conversation.

Features

• #1 - Badge wearer's name (set in config.h)
• #2 - QR Code to a URL (set in config.h)
• #3 - US standard CO2 label and value
• #4 - Battery level
• #5 - Wakes the ESP32 from deep sleep and refreshes the screen

Target configuration

• See config.h for parameter configuration

Bill of Materials (BOM)

• MCU
  • ESP32
• WiFi
  • comment #define RJ45, uncomment #define WIFI in config.h
  • Supported hardware
    • ESP32 based boards
• Environment Sensors
  • Supported hardware
    • SCD40 temp/humidity/CO2 sensor
  • Technical references
    • https://cdn-learn.adafruit.com/assets/assets/000/104/015/original/Sensirion_CO2_Sensors_SCD4x_Datasheet.pdf?1629489682
    • https://github.com/Sensirion/arduino-i2c-scd4x
    • https://github.com/sparkfun/SparkFun_SCD4x_Arduino_Library
    • https://emariete.com/en/sensor-co2-sensirion-scd40-scd41-2/
• Battery (monitor)
  • define battery size in Step 2 of config.h
  • Supported hardware
    • LC709203F battery voltage monitor
    • Adafruit batteries
• Screen
  • Supported hardware
    • 296x128 e-paper display
      • Adafruit MagTag (EPD)
  • Technical References
    • https://cdn-learn.adafruit.com/downloads/pdf/adafruit-gfx-graphics-library.pdf

Issues and Feature Requests

• See GitHub Issues for project

.plan (big ticket items)

• gxEPD2 support
• GPIO (button) ESP32 wakeup support to have multiple screens of information
  • code is largely included to support this, need to change hardware