arduino-info-display/docs/hardware-notes.md

Hardware Notes

Core Components

• Arduino MKR1000
• SH1106 OLED display
• AM2302 temperature and humidity sensor
• Two momentary buttons for user input

Planned Responsibilities

Arduino MKR1000

• Main controller
• Sensor reading
• Display updates
• Button input handling
• Network connectivity for time and weather data

SH1106 OLED Display

• Render the current screen
• Present concise text-based information

AM2302 Sensor

• Provide ambient temperature
• Provide ambient humidity

Buttons

• Next button for navigation
• Select button for action or mode selection

Wiring Status

The physical wiring is already assembled. Current documented wiring is:

Button Wiring

Select button

• Signal pin: A5
• Wiring: pull-up with 10K resistor

Next button

• Signal pin: A4
• Wiring: pull-up with 10K resistor

Sensor Wiring

AM2302

• Measurement/data pin: A3
• VCC -> 3V3
• GND -> GND

Display Wiring

SH1106

• Interface: I2C
• SCK -> SCL
• SDA -> SDA
• VCC -> 5V
• GND -> GND

Ground

All component ground pins are connected to common GND.

Assumptions To Verify Later

• The SH1106 module is compatible with the MKR1000 voltage levels
• The AM2302 is powered within its supported operating range
• The button pull-up arrangement matches the intended firmware logic
• Available pins are sufficient for the display, sensor, and both buttons

Risks To Keep In Mind

• OLED modules may vary by interface and initialization details
• Sensor timing can be sensitive depending on the library used
• Network-based features may require retry logic and fallback screen states