Hello!
I'm trying to read the temperature from a MCP9808. The sensor is on a breakout board from Adafruit, so pull-up resistors are already built in. I have tried with 3.3 and 5V. The problem is that I get no error, but the read data is always 0.
My code:
Byte[] rx = new Byte[2];
// 0x18 is the default address of the sensor
// I have tried 100 and 400kHz
I2CDevice.Configuration config = new I2CDevice.Configuration(0x18, 400);
I2CDevice sensor = new I2CDevice(config);
I2CDevice.I2CTransaction[] settings = new I2CDevice.I2CTransaction[]
{
// 0x05 is the register for the temperature
// I have also tried register 0x07 which should get the device ID
I2CDevice.CreateWriteTransaction(new byte[] { 0x05 })
};
I2CDevice.I2CTransaction[] rd = new I2CDevice.I2CTransaction[]
{
I2CDevice.CreateReadTransaction(rx)
};
sensor.Execute(settings, 1000);
while (true)
{
sensor.Execute(rd, 1000);
// always "00"
Debug.Print(rx[0].ToString() + rx[1].ToString());
Thread.Sleep(2000);
}
Can you give me a hint what I'm doing wrong?
I got the register numbers from the Arduino library: https://github.com/a...hive/master.zip
Thank you very much!
