Datasheet

To read one or more registers, issue a write command and transmit the register address

that should be read from, followed by a stop command. Then issue a read command, the

data read will be the value that is stored in that register. Issuing another read command

will automatically read the value in the next register. This can go on until all registers have

been read. After reading the last register, additional read commands will return 0xFF.

Issuing a stop command will terminate the read event.

Reading register values

Example

Start reading at register 0x04 and read 2 times.

0x04

0x05

Read

Stop

Write

Start Stop

0x04

Address

Read

Start

Address

byte i2c_device_address=0x64;

byte reg_4, reg_5;

Wire.beginTransmission(i2c_device_address);

Wire.write(0x04);

Wire.endTransmission();

Wire.requestFrom(i2c_device_address,2);

reg_4=Wire.read();

reg_5=Wire.read();

Wire.endTransmission();

Example code

reading two registers

The default device address is 0x64

This address can be changed.