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SDA for data, and SCL for clock and both of them are bidirectional (send or receive). The I2C is a 2-wire communication interface, so it’s got only 2 lines on the bus. Note: You have to refer to the specific device datasheet to check the typical details for the i2c hardware specifications that have actually been implemented on-chip. Ultra Fast-Mode (UFm), with a bit rate of up to 5 Mbit/s.High-speed Mode (Hs-mode), with a bit rate up to 3.4 Mbit/s.

Fast-Mode Plus (Fm+), with a bit rate up to 1 Mbit/s.

Fast-Mode (Fm), with a bit rate up to 400 kbit/s.

Standard-Mode (Sm), with a bit rate up to 100 kbit/s.

Standard-mode, Fast-mode (Fm), Fast-mode Plus (Fm+), and High-speed mode (Hs-mode) Over time there have been several additions to the specification so that there are now five operating speed categories. Originally, the I2C-bus was limited to 100 kbit/s operations. Just as external EEPROMs, Digital Temperature Sensors, LCD Controllers, OLED Display, RTC, and much more. It’s widely used for attaching lower-speed peripheral ICs to processors and microcontrollers in short-distance, intra-board communication. The I 2C is a multi-master, multi-slave, synchronous, bidirectional, half-duplex serial communication bus.

I 2C (i-square-c) is an acronym for “Inter-Integrated-Circuit” which was originally created by Philips Semiconductors (now NXP) back in 1982. Get The ESP32 Full Course Kit (List of components).Or just refer to the table for the exact components to be used in practical LABs for only this specific tutorial. You can either get the complete course kit for this series of tutorials using the link down below. Arduino IDE For ESP32 (Setup Guide) Hardware Components.Arduino Basic: How to use the Arduino I2C Scanner? Prior Knowledge