• Adafruit Feather M4 Express
• Adafruit AirLift FeatherWing ESP32
• Adafruit NeoPXL8 FeatherWing M4
• Adafruit INA219 FeatherWing

1. Copy wifi-config.example.h to wifi-config.h and fill in values.
2. Install board following instructions.
3. Install required libraries (and their dependencies) via Arduino IDE.
   1. Adafruit SAMD
   2. Adafruit SleepyDog
   3. Adafruit NeoPXL8 - see docs
   4. Adafruit NeoPixel
   5. Adafruit ZeroDMA
   6. Adafruit WiFiNiNA - manual install, forked from arduino, see docs
   7. Adafruit INA219
   8. MQTT_Looped
4. For VS Code, compile to finish intellisense setup.
   1. .vscode/c_cpp_properties.json may update.
5. Configure defines in cryptid-bottles.h and src/pxl8.h if relevant.

• Output #0 comes from RX (Available; shared by ESPRX)
• Output #1 comes from TX (Available; shared by ESPTX)
• Output #2 comes from D9 (Available)
• Output #3 comes from D6 (Available)
• Output #4 comes from D13 (Unavailable, used by ESPCS!)
• Output #5 comes from D12 (Unavailable, used by ESPRST!)
• Output #6 comes from D11 (Unavailable, used by ESPBUSY!)
• Output #7 comes from D10 (Available; shared by ESPGPIO0)

• SPIWIFI from SPI
• SPIWIFI_SS from D13
• ESP32_RESETN from D12
• SPIWIFI_ACK from D11
• ESP32_GPIO0 disabled

• Pin D8 is connected to the onboard mini NeoPixel.
• Analog pin A0 used for random seed.
• Current sensor INA219 connects over I2C at its default address, 0x40.

Bottles can be controlled over MQTT.

• Birth and LWT messages sent on cryptid/bottles/status as online/offline.

• Status messages sent on cryptid/bottles/state in JSON.

• Discovery (auto-config) messages published for Home Assistant (prefix homeassistant/) on startup, reconnection, and Home Assistant birth messages.

• Commands for:

  Topic	Payload
  on	ON/OFF
  brightness	0-255
  rgb	0-255,0-255,0-255, e.g. 0,128,200
  white_balance	30-90 in mireds, e.g. 40, 65
  white	0-255
  effect	Default, Glow, Glow White, Faeries, Rain, Rainbow, Test, Test White, Illuminate, Warning
  glow_speed	Slow,Medium,Fast
  faerie_speed	Slow,Medium,Fast

• See src/control.cpp for individual command details.

The two RGB LEDs on both the M4 and ESP32 boards will display:

• 💚 green: Bootloader active (M4 only) (double tap Reset to activate)
• 🧡 orange: WiFi disconnected, connecting
• 💜 purple: MQTT disconnected, connecting
• 💙 cyan: Sending MQTT message
• 🛑 red: Unknown error

🔌 The large green LED on the board with the INA219 indicates power, behind main capacitors.