![]() ![]() ![]() The SCL line carries the clock signal used for communication timing. The SDA wire is used for sending the actual data back and forth between the master and slave devices. The BusĪn I2C bus is simply two wires that connect all of the I2C devices in the network. When sending data on the bus, only one device can send data at a time. Slave devices respond to whatever a master device sends. Master devices can send and receive data. The I2C address makes it possible for a master device to send data to a particular slave device on the bus. ![]() Slave DevicesĮach slave device has an I2C address that is used to identify the device. I2C networks can have multiple master devices and slave devices. The master and slave devices are connected by a bus. The I2C NetworkĪn I2C network consists of a master device and a slave device. It covers all of the steps, diagrams, and code you need to get started. While (1 < Wire.BONUS: I made a quick start guide for this tutorial that you can download and go back to later if you can’t set this up right now. ![]() This make the communication not byte to byte controlled as I want it to be for my need. I realized that if I wanted to make an Arduino slave, when receiving from master, it actually reads from a buffer that is already previously received. But let’s start with the problem found in the Wire. When the limitations were somehow fixed, even though the small number of modifications (it is somehow a sort of hacking of the library) I found that the my final result were so useful to me that I thought was worth to write a short article about it. Then, when experimenting with a portability of a project in the Arduino environment, I started to trying the official Wire library, discovering some incompatibilities for my needs. I have spent a lot of time on playing and later working on the I2C buses. I almost always used self developed libraries, both for learning and job requirement purposes. ![]()
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