This block reads the selected Register value of the selected I2C device. Micro:bit code is in two parts: - Button-A press code set enables youīefore we examine the code for these two functions, let’s review the I2C related coding blocks of the microBlocks IDE.įollowing blocks make up the I2C functions:
Let’s look at both of them: ¶ Micro:bit Code ¶ Procedureįor our project we will need two sets of programs: one for the micro:bit and one for the Arduino. In addition to the connectivity between the boards shown above, remember to use the respective USB cables to plug them into your LAPTOP or DESKTOP computer for programming. Please DO NOT directly connect these two to each other without a breakout board that provides voltage conversion. Micro:bit and Arduino use different operating voltages, 3.3V and 5V respectively. Let’s look at how to cable the micro:bit and the Arduino systems to each other to establish the I2C connectivity. NOTE: It is assumed that the audience is familiar with the Arduino IDE use and loading programs onto the Arduino. For Arduino: microbit I2Cslave XMIT RECV.For micro:bit: I2CToArduino MicroBlocks program.We used KEYESTUDIO KS0308 Motor Breakout Boardīut many others that expose pins 19 and 20 of micro:bit will do just fine. Some version of micro:bit breakout board.Then we will look at the coding required for both devices to implement the I2C protocol.įollowing that, we will exchange some messages between micro:bit and Arduino. You will follow the Setup instructions for cabling the two devices to establish a link between them and to power them. In our project, micro:bit will be master and Arduino will be slave. The other SDA is used to transfer data in both directions.ĭevices are designated either as Master or Slave, with Master controlling all the exchanges.
One cable SCL provides the clock signaling between the systems. I2C uses just two cables and is very easy to set up. In this writeup we will establish an I2C link from a micro:bit to an Arduino and communicate between them. MicroBlocks supports both I2C and SPI communications.
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