Arduino Shield

📛 Title

BlueFi Shield – ESP32-Based Wi-Fi + Bluetooth Shield for Arduino

📝 Description

BlueFi Shield is a compact, powerful ESP32-based Arduino shield that adds Wi-Fi, Bluetooth Classic, and BLE to any standard Arduino board. It’s designed for flexibility: use it as a wireless co-processor, a standalone ESP32 dev board, or a hybrid communication module. Built with EasyEDA Pro and fully open source, this project was submitted for Hack Club’s Silicon hardware program.

(Big thanks to EasyEDA for sponsoring this event 💙)

✨ Project Features

• 🧠 ESP32-WROOM-32E (Wi-Fi + Bluetooth Classic + BLE)

• 🔌 UART interface with level-shifted TX

• 🔄 Dual-mode: Shield or Standalone ESP32

• 🎛️ RESET & BOOT buttons (EN and IO0 support)

• 🌈 NeoPixel ready with optional onboard WS2812B

• ⚡ Touch input pad (GPIO4 / T0)

• 🛠️ 100% JLCPCB Basic parts for Economic PCBA

• 🎨 Back-side ASCII art and labeled silkscreen

🧩 Installation Guide

If using as a NeoPixel/touch demo board:

1. Flash with Arduino IDE

2. Example code:

   #define TOUCH_PIN T0
   #define LED_PIN 14
   void setup() { pinMode(LED_PIN, OUTPUT); }
   void loop() {
     if (touchRead(TOUCH_PIN) < 40) digitalWrite(LED_PIN, HIGH);
     else digitalWrite(LED_PIN, LOW);
   }
   

If using as a UART co-processor:

• Connect D2 → RX, D3 ← TX

• Use EN/IO0 buttons for bootloader upload if needed