Wire \ Libraries \ Wiring 1.0 (ALPHA)

| Index

| Reference for Wiring 1.0 (ALPHA) 0020+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.

Name |  | ### requestFrom()
Examples |  |
    #include <TwoWire.h>

    void setup()
    {
      Wire.begin();        // join i2c bus (address optional for master)
      Serial.begin(9600);  // start serial for output
    }

    void loop()
    {
      Wire.requestFrom(2, 6);    // request 6 bytes from slave device #2

      while(Wire.available())    // slave may send less than requested
      {
        char c = Wire.receive(); // receive a byte as character
        Serial.print(c);         // print the character
      }

      delay(500);
    }
Description |  | The requestFrom() method start read a specified number of bytes from the device specified with a given address.
Syntax |  |
    Wire.requestFrom(address, quantity)
Parameters |  |
address |  | An int number between 0 and 127 specifying the address of the device to be read.
quantity |  | An int number specifying the number of bytes to be read.
Wire |  | The hardware TWI port
Returns |  | None
Usage |  | Application