__I2C__ is a [hardware] serial interace used across many microprocessors and microcontrollers, including the [Raspberry Pi]. It permits sensors and other IO devices to be connected to the controller (and/or each other) with only four wires (or really only ''two'' if you don't count Vcc and ground): # Vcc (3-6v) # SDA # SCL # Gnd (Ground) The Pimoroni "Breakout Garden" set of I2C sensors also includes an "{{{INT}}}" (interrupt) pin, ''AKA'' "{{{GCLK}}}" or "{{{GPIO4}}}". Some well known I2C products. No two I2C || Stock || Brand || Description || 7 bit address || Notes | 1 | Pimoroni | LTR-559 Light & Proximity | 0x23 | | 1 | Pimoroni | VL53L1X Time of Flight (ToF) | 0x29 | range 40mm-4m | 1 | Adafruit | VL6180X Time of Flight Distance Sensor | 0x29 | range 5-100mm | 1 | Pimoroni | 11x7 LED Matrix #1 | 0x75 | | 1 | Pimoroni | 11x7 LED Matrix #2 | 0x77 | | 1 | Pimoroni | 5x5 RGB Matrix | 0x74 / 0x77 | 77 will be in conflict with 11x7 #2 | 1 | Pimoroni | ADS1015 +/-24V ADC 3 Channel | 0x48 / 0x49 | | 2 | Adafruit | ADS1015 12 bit ADC 4 Channel w Prog Gain | 0x48 - 0x4B (jumpers) | | 1 | PiBorg | Thunderborg | 0x10 / 0x11 | | 1 | PiBorg | Ultraborg | 0x36 | | 1 | Pimoroni | ICM20948 9-DOF Motion Sensor | 0x68 / 0x69 | | 1 | Adafruit | BNO055 Absolute Orientation Sensor | 0x28 / 0x29 | | 0 | Adafruit | VCNL4010 Proximity Sensor | 0x13 | | 0 | Adafruit | LSM9DS1 Accel Gyro Mag Temp 9-DOF | 0x1C / 0x1E Accel, 0x6A / 0x6B for Gyro | | 0 | Adafruit | VL53L0X Time of Flight Distance Sensor | 0x29 | range 50-1200mm (2m on long range) "Stock" is how many [Murray] has in his robot laboratory as part of exploratory design and development of the [KR01] robot. !! Links * [I2C|https://en.wikipedia.org/wiki/I%C2%B2C] on Wikipedia * [Configuring I2C|https://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/configuring-i2c] from AdaFruit * [I2C|https://learn.sparkfun.com/tutorials/i2c] on SparkFun * [Raspberry Pi SPI and I2C Tutorial|https://learn.sparkfun.com/tutorials/raspberry-pi-spi-and-i2c-tutorial/all] ---- [{Tag Hardware}]