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Using a Samd21 board and esp32 board to control the aux light on my 2021 Ford Bronco.

Bronco Light Control Mk.2

Posted on October 11, 2023

Parts

1x 12v to 5v DC to DC converter
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2x Neokey 1x4

1 Neokey will control the relays and the other with control the rf signals. 

8x Kailh Mechanical Key Switch
8x Translucent Keycap
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3x STEMMA QT / Qwiic cable
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Wire
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2x Prototype PCB Board
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Male and Female Headers
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1x Microcontroller with Stemma Qt or Qwiic port

I used a SparkFun Pro RF – LoRa, 915MHz because it’s what I had around. But any microcontroller with a Stemma QT or Qwiic port should work. Also four output pins are also needed. 

1x Four Channel Relay Board
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1x Adafruit Feather with headers

I used a Adafruit ESP32 S2 Feather

1x Adafruit FeatherWing OLED 128x64 OLED
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1x Adafruit I2C Stemma QT Rotary Encoder Breakout with NeoPixel
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1x Rotary Encoder

Since the Breakout board didn’t come with one.

1x Rotary Encoder Knob
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1x Rf Module Transmitter
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Tools

Solder Wire
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Soldering Iron
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Computer with Arduino IDE
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Instructions

Accordion #1
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Accordion #2
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