![]() ![]() The bus master is responsible for initiating all communications. The I 2C bus allows multiple slave devices to share communication lines with a single master device. In order to work, the 2 lines of the I 2C, the clock and data lines, need pull-up resistors to the positive I 2C protocol can use multiple devices that all share the same communication lines: a clock signal (SCL)Īnd a bidirectional data line used for sending information back and forth between the master and slave (SDA). ![]() The protocol is known as the "two-wire" protocol because 2 lines are used for communication. The I 2C protocol was created by Phillips in the early 1980s and was standardized and adopted widespread The I 2C bus is a bus which enables high-speed two-way communication between devices while usingĪ minimal number of I/O pins to facilitate communication.Īn I 2C bus is controlled by a master device (usually a microcontroller) and contains one ore more slaveĭevices that receive information from the master device. In this project, we will show how to connect multiple I 2C devices to an arduino microcontroller. How to Connect Multiple I 2C devices to an Arduino Microcontroller
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