Apologize for my english... 
I AM WORKING ON K33 LP T RH SENSOR.But I am not getting any useful data.I wanted to ask is there any wake up pulse signal is needed. Because I read about k33 BLG only need wake up pulse.
Right now I am going through this sequence:
I2C.Start();
I2C.write(0xD0);//write addr
I2C.write(0x22);//read RAM of 2 bytes
I2C.write(0x00);
I2C.write(0x08);//co2 RAM location
I2C.write(0x2A);//checksum
I2C.End();
wait(20);
I2C.read();
and one more thing is that we have to tell the sensor to take measurement after wake up signal if needed.
Thanks in advance