On the slave side, under "hello" create the integer num, create an array myArray. So lets say we want to send the int 20,000 from the slave to the master. Important: notice only 1 byte at a time is being sent over, what if you want to send over an int which is composed of 2 bytes? A solution is to send over the higher bytes first, then the lower bytes second and recombine the two back into an integer on the other side. Finally, inside the function requestEvent(), to send data use the method Wire.write(). In the slave set up, the onRequest method registers what happens when a master requestsFrom. The MPU6050 IMU has a fixed address of 0圆8, so make sure any I2C devices planned to be used have unique addresses. Something to note: if the slave is an Arduino you may set the address for example 8 is used here, however other I2C devices may have a fixed address. On the slave side, initialize Wire.begin(address) with the address of that slave. The requestFrom method takes the inputs of a slave address and how many bytes to take from that slave, then proceeds to send a signal to the slave asking for this information.
Arduino i2c example slave code#
On the left is the code for the master, leaving out the argument on Wire.begin() initializes the device as a master. Below is an example of a master reading from a slave. Also, both devices must share the same ground. To connect an I2C device, you must connect data(SDA) and clock(SCL) pins together, on the Uno these are pins A4 and A5. The (Wire library) allows communication between the Arduino and other I2C compatible devices, for example another Arduino.
0 kommentar(er)
