I2C protocol problem

Using Arduino Networking, Protocols, and Devices
1

Hi, I found a sensor that works with I2c protocol, but in the list of the command bytes that must be sent, there is somthing strange.
It gives somthing like that:

command byte 0 byte 1 byte 2

read measurment byte 0 0x02 0x41 R+0x03
read measurment byte 1 0x02 0x42 R+0x03
.
.
.

it is the "R+" in front of the third byte that I don't understand, can anyone help me?

2

A link to the sensors data sheet would help :wink:

3

Yep, sorry

Appendix 7-LEGO MINDSTORMS NXT Ultrasonic Sensor I2C communication protocol.pdf (404 KB)

4

I guess it means "Reading". The address probably is 0x01, which result then in a writing address byte of 0x02 and a reading address byte of 0x03.