SierraClock

Arduino-based clock/weather display for Ford Sierra vehicles. Displays time, temperature and humidity on an OLED screen with SIERRA logo.

Features

• Clock with time setting
• Temperature and humidity display (BME280)
• SIERRA logo
• About screen

Apps

App	Description
Clock	Time display, OK to set time
Weather	Temperature and humidity
About	Author info
Logo	SIERRA logo

Buttons

Button	Label	Function
BTN1 (D2)	OK (h)	Select / increment hours
BTN2 (D3)	NEXT (min)	Navigate / switch to minutes

Hardware Requirements

• Arduino Nano/Micro
• BME280/BMP280 temperature/humidity/pressure sensor (I2C address: 0x76)
• SH1106G OLED display 128x64 (I2C address: 0x3C)
• 2 buttons

I2C Connections

Pin	Arduino
SDA	A4
SCL	A5

Required Libraries

• GyverBME280
• Adafruit GFX Library
• Adafruit SH110X

Install via Arduino IDE Library Manager or:

arduino-cli lib install "GyverBME280" "Adafruit GFX Library" "Adafruit SH110X"

Install arduino-cli

macOS

brew install arduino-cli
arduino-cli core install arduino:avr

Linux

curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | sh
arduino-cli core install arduino:avr

Build and Upload

# Compile
arduino-cli compile --fqbn arduino:avr:nano clock/clock.ino

# Upload (adjust port as needed)
arduino-cli upload -p /dev/cu.wchusbserial110 --fqbn arduino:avr:nano clock/clock.ino

Wiring Diagrams

BME280/BMP280

SH110X OLED (e.g. SH1106)

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