What is the use of I2C interface on Raspberry Pi?

The I2C bus allows multiple devices to be connected to your Raspberry Pi, each with a unique address, that can often be set by changing jumper settings on the module. It is very useful to be able to see which devices are connected to your Pi as a way of making sure everything is working.

What is I2C used for?

The I2C protocol is used to establish communication between two or more ICs (Integrated Circuits), hence why it’s known as Inter-Integrated Circuit (I2C) communication. However, it should be noted that I2C could also be used as a communication protocol between two ICs that are located on the same PCB.

What is SDA and SCL in Raspberry Pi?

I²C or Inter-integrated Circuit protocol is a hardware protocol designed to allow multiple, slave integrated circuits to communicate with one or more master. It uses two bidirectional open-drain lines, Serial Data Line (SDA) and Serial Clock Line (SCL), pulled up with resistors.

What is SPI interface Raspberry Pi?

Serial Peripheral Interface (SPI) is a full-duplex serial protocol for communicating with high-speed peripherals. The SPI Controller on Raspberry Pi™ hardware can drive two SPI peripheral devices. The SPI Controller has four pins: GPIO 11 (SPI0_SCLK) outputs a serial clock signal to synchronize communications.

Does Raspberry Pi have I2C?

Inter-Integrated Circuit (I2C) is a protocol for communicating with low-speed peripherals. Depending on the model and revision of your board, Raspberry Pi™ hardware has one or two I2C buses. Each bus has an I2C Central connected to two bidirectional lines, serial data line (SDA), and serial clock (SCL).

What is the significance of SCL line on I2C and SPI interfaces?

The SCL line is used to transmit the clock signal that synchronizes the transfer of data between the devices on the I2C bus, and the master generates the clock signal. The other line is the SDA line that is used to send the data.

What is better SPI or I2C?

Overall, SPI is better for high speed and low power applications, while I2C is better suited for communication with a large number of peripherals, as well as in situations involving dynamic changing of the primary device role among peripherals on the I2C bus.

What is I2C multiplexer?

On the same I2C port, DFRobot Gravity: I2C Multiplexer solves the address conflict and enables the normal communication with multiple same-address I2C devices. The default I2C address of the multiplexer is 0x70, and you can adjust from 0x70 to 0x77.

What is the difference between SPI and I2C communication?

Unlike SPI, I2C supports multi-master hardware connection which is useful for industrial applications where one sensor needs to to be controlled and accessed by multiple master devices. Raspberry Pi 3 supports I2C communication.

Does Raspberry Pi 3 support I2C communication?

I2C Support in Raspberry Pi 3. Raspberry Pi 3 supports I2C communication. It can support for both single master and multi-master configuration. In this post, we will make a simple I2C demonstration with Raspberry Pi3 as a single master and two Arduino UNO devices as slaves. So this will be a single master, two slave setup.

How to enable the SPI peripheral on the Raspberry Pi?

The SPI peripheral is not turned on by default. There are two methods to adjust the settings. To enable it, do the following. You can use the Desktop GUI by heading to the Pi Start Menu > Preferences > Raspberry Pi Configuration. Click on image for a closer view.

What can be added to a microprocessor over the I2C interface?

There are many peripherals that can be added to a microprocessor over the I2C and SPI serial interfaces. These include atmospheric sensors, EEPROMS, and several types of display. The Pi Wedge helps access the I2C and SPI signals.