This will be the basis on which you’ll choose the most suitable form of communication between the two Arduino boards (I2C devices). Which depends on your target application and what you’re trying to achieve. Therefore, the I2C communication between two Arduino boards can take one of the following forms: Arduino I2C Slave Receiver-Transmitter ExampleĪn I2C device (Master or Slave) can be a transmitter or a receiver and it’s up to you, the system designer & programmer, to decide whether a specific I2C device on the bus (Master or Slave) will be a data transmitter or receiver. Without further ado, let’s get right into it! Table of Contents We’ll run the I2C communication between two Arduino boards projects in both the simulation environment and in real life to check how it behaves.
We’ll discuss all 3 possible I2C communication scenarios and create 3 different Arduino I2C Slave Examples to cover them all. We’ll start off by discussing some Arduino I2C communication basics and fundamentals as a quick review of what we’ve previously learned in more detail in this previous Arduino I2C Tutorial. that supports the SPI interface Thousands of different Components and Sensors supports the SPI interfaceģ3 SPI Master SCLK MOSI MISO CE SPI SPI devices communicate in full duplex mode using a master-slave architecture with a single master Arduino SPI ADC, SPI Sensor, etc.In this tutorial, we’ll discuss the Arduino I2C Slave Set Up procedure and how to set your Arduino as an I2C Slave device. Device Address: 0x48 Datasheet:Ģ7 TC74 Example - Wiring SDA - Serial Data Bidirectional SCLK - Serial Clock Input VDD Power Supply Input GND Ground NC - Not in use (Not Connected)ģ1 SPI Serial Peripheral Interface (SPI) Hans-Petter Halvorsen Table of Contentsģ2 SPI Serial Peripheral Interface (SPI) 4 Wire Protocol (SCLK, CE, MOSI, MISO) SPI is an interface to communicate with different types of electronic components like Sensors, Analog to Digital Converts (ADC), etc. The system interface is a slave SMBus/I2C port, through which temperature data can be read at any time. It stores the data in an internal register which is then read through the serial port. with I2C InterfaceĢ4 I2C with Arduino VDD Power Supply Input GND Ground SDA (A4 pin) - Serial Data Bidirectional SCLK (A5 pin) - Serial Clock InputĢ5 TC74 Temperature Sensor Hans-Petter Halvorsen Table of ContentsĢ6 TC74 Temperature Sensor SMBus/I2C Interface TC74A0-5.0VAT The TC74 acquires and converts temperature information from its onboard solid-state sensor with a resolution of ☑ C. Arduino SDA SCL I2C Slave SDA SCL I2C Slave ADC, DAC, Sensor, etc.
using I2C and SPI CommunicationĢ1 I2C Inter-Integrated Circuit (I 2 C) Hans-Petter Halvorsen Table of ContentsĢ2 I2C I2C is a multi-drop bus 2-Wire Protocol: SCL (Clock) + SDA (Data) Multiple devices can be connected to the I2C pins on the Arduino Each device has its own unique I2C addressĢ3 I2C Master SDA SCL I2C Multiple devices can be connected to the I2C pins on the Arduino Master Device that generates the clock and initiates communication with slaves Slave Device that receives the clock and responds when addressed by the master. In this Tutorial we will use the more advanced features and communicate with Digital Sensors, etc. without the need of an expensive DAQ device or Software. You then get a very low-cost DAQ/Datalogging System! In that way we can create Data Logging Applications, IoT Applications, etc. LabVIEW is a popular Graphical Programming Environment LabVIEW LINX Toolkit is an add-on for LabVIEW which makes it possible to program the Arduino device using LabVIEW If you don t have LabVIEW Professional Software, you may use the LabVIEW Community Edition, which is free for non-commercial use. 1 LabVIEW LINX Arduino using SPI and I2C Hans-Petter HalvorsenĢ Table of Contents Introduction Arduino LabVIEW LabVIEW LINX SPI and I2C Communication Protocols I2C TC74 Temperature Sensor with I2C Interface LabVIEW LINX Example SPI DAC MCP4911 Digital to Analog Converter with SPI Interface (Arduino has no Analog Out) LabVIEW LINX Exampleģ Introduction Hans-Petter Halvorsen Table of ContentsĤ Contents This Tutorial shows how we can use Arduino in combination with the LabVIEW Programming environment Arduino is a cheap open-source Microcontroller platform with Input/Output pins that can be used for many purposes like reading Sensor data, Datalogging, Internet of Things Applications, etc.