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Linux & Setup
Raspberry Pi OS imaging headless SSH setup hostname configuration package updates systemd service basics journalctl logs environment variables Python virtual environment
GPIO Digital I/O
GPIO pin numbering digital output LED digital input button pull-up resistor button debounce PWM LED brightness GPIO cleanup edge detection
Sensors & Buses
I2C device scan I2C sensor read SPI overview SPI transfer UART serial read 1-Wire temperature sensor ADC via external chip sensor calibration
Automation
cron scheduled task systemd autostart app camera capture filesystem data logging MQTT publish MQTT subscribe HTTP sensor endpoint local SQLite logging
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static IP concept mDNS hostname Wi-Fi configuration SSH key authentication SFTP file transfer Nginx reverse proxy firewall with ufw network diagnostics
Hardware Projects
servo control ultrasonic distance sensor relay module safety RGB LED mixing buzzer tone PIR motion sensor rotary encoder safe shutdown button
Raspberry Pi / Sensors & Buses

I2C sensor read

Learn I2C sensor read in Raspberry Pi with a dedicated explanation, a concept-specific example, practical cautions, and a mastery check.

12 min read • Intermediate
raspberry-pi-018.py
python 
from smbus2 import SMBus
ADDR=0x48
with SMBus(1) as bus:
    raw=bus.read_word_data(ADDR,0x00)
print(hex(raw))
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