![]() ![]() I 2C slave devices react to data on the bus only when it is drected at their ID number. When communication is initiated by the master device, a device I 2C device has a unique 7-bit address, or ID number. When a command or request is sent out by the master device, it is received by all slave devices on the bus. This prevents multiple slave devicesįrom all trying to communicate at the same thing, causing garbled messages. ![]() Initiate communications they only respond to requests that are sent by the master device. 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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