//the meat - called by event handler - read sensor, format data and update screen and AIO
private async void ReadI2CTemp()
{
byte TempRawMSB, TempRawLSB; //use later
byte[] ReadBuf = new byte[2]; // MSB first, then LSB
byte[] WriteBuf = new byte[] { TEMP_REG_ADDR }; // 0 selects data register - write it out first
byte[] ConfBuf = new byte[] { CONFIG_REG_ADDR, 0xE1, 0xA0 }; //hit the OS bit (assume rest unchanged)
//should read and mask bit ...
//byte[] WriteBuf = new byte[] { CONFIG_REG_ADDR, 0xE1, 0xA0 };
try
{
/*
* Read from the temp sensor
*/
I2CTemp.Write(ConfBuf);
I2CTemp.WriteRead(WriteBuf, ReadBuf);
//I2CTemp.Read(ReadBuf);
}
catch (Exception e)
{
/* If WriteRead() fails, display error messages */
Text_X_Axis.Text = "Error";
Text_Status.Text = "Exception: " + e.Message;
return;
}
/*
* In order to get the raw 16-bit data values, we need to concatenate two 8-bit bytes from the I2C read for each axis.
* We accomplish this by using bit shift and logical OR operations
*/
//TempRaw = (Int16)(ReadBuf[0] | ReadBuf[1] << 8);
TempRawMSB = ReadBuf[0];
TempRawLSB = ReadBuf[1];
/* Convert raw values to G's */
//AccelerationX = (double)AccelerationRawX / UNITS_PER_G;
int temp = ((TempRawMSB << 8) | TempRawLSB) >> 4;
//double celsius = temp * 0.0625;
String Celsius = (temp * 0.0625).ToString("F2");
/* Display the values */
Text_X_Axis.Text = "Temp (RAW): " + TempRawMSB.ToString("X2") + " " + TempRawLSB.ToString("X2");
Text_Y_Axis.Text = "Celsius: " + Celsius;
Text_Status.Text = "Status: Running";
//Adafruit IO Web update
//Call function to update AIO with temp data. A simple GET. Returns status code
String resCode = await UpdateAIO(Celsius);
//Report the status on screen/console. Should be 200/OK
AIO_Status.Text = "AIO Status: " + resCode;
//Blip the LED so we know something happening.
FlashLED();
}
private void ReadI2CTemp()
{
byte TempRawMSB, TempRawLSB; //use later
byte[] ReadBuf = new byte[2]; // MSB first, then LSB
byte[] WriteBuf = new byte[] { TEMP_REG_ADDR }; // 0 selects data register - write it out first
byte[] ConfBuf = new byte[] { CONFIG_REG_ADDR, 0xE1, 0xA0 }; //hit the OS bit (assume rest unchanged)
//should read and mask bit ...
//byte[] WriteBuf = new byte[] { CONFIG_REG_ADDR, 0xE1, 0xA0 };
try
{
/*
* Read from the temp
*/
I2CTemp.Write(ConfBuf);
I2CTemp.WriteRead(WriteBuf, ReadBuf);
//I2CTemp.Read(ReadBuf);
}
catch (Exception e)
{
/* If WriteRead() fails, display error messages */
Text_X_Axis.Text = "Error";
Text_Status.Text = "Exception: " + e.Message;
return;
}
/*
* In order to get the raw 16-bit data values, we need to concatenate two 8-bit bytes from the I2C read for each axis.
* We accomplish this by using bit shift and logical OR operations
*/
//TempRaw = (Int16)(ReadBuf[0] | ReadBuf[1] << 8);
TempRawMSB = ReadBuf[0];
TempRawLSB = ReadBuf[1];
/* Convert raw values to G's */
//AccelerationX = (double)AccelerationRawX / UNITS_PER_G;
int temp = ((TempRawMSB << 8) | TempRawLSB) >> 4;
//double celsius = temp * 0.0625;
String Celsius = (temp * 0.0625).ToString("F2");
/* Display the values */
Text_X_Axis.Text = "Temp (RAW): " + TempRawMSB.ToString("X2") + " " + TempRawLSB.ToString("X2");
Text_Y_Axis.Text = "Celsius: " + Celsius;
Text_Status.Text = "Status: Running";
//Adafruit IO Web PUT
String req = "https://io.adafruit.com/api/groups/RPi/send.json?x-aio-key=" + AIO_Key + "&temp=" + Celsius + "&status=" + "Running";
HttpWebRequest g = (HttpWebRequest)WebRequest.Create(req);
//WebRequest.Timeout = 1000;
//Assuming codes are OK, not 400, 500
var r = g.GetResponseAsync();
AIO_Status.Text = "AIO Status: OK";
}
