I just got a Atlas Scientific ENV-RGB sensor from sparkfun, and I've spent the last two days trying to get it to work. I hooked it up according to the datasheet with red going to 3.3V, black to ground, white (tx) to digital pin 0(rx) and green(rx) to digital pin 1(tx) on the Netduino. Also I have the following code.
public static void Main() { SerialPort sp; try { sp = new SerialPort(Serial.COM1, 38400, Parity.None, 8, StopBits.One); sp.Open(); sp.DataReceived += new SerialDataReceivedEventHandler(SerialDataReciever); byte[] message = Encoding.UTF8.GetBytes("Er"); Debug.Print(new string(Encoding.UTF8.GetChars(message))); sp.Write(message, 0, message.Length); while (true) { } } catch (Exception e) { Debug.Print(e.StackTrace); } } public static void SerialDataReciever(object obj, SerialDataReceivedEventArgs args) { SerialPort thePorts = obj as SerialPort; if (thePorts.BytesToRead > 4) { byte[] buffer = new byte[30]; thePorts.Read(buffer, 0, thePorts.BytesToRead); Debug.Print(new string(Encoding.UTF8.GetChars(buffer))); } }
The problem I'm having is that even though my SerialDataReciever method is getting called the bytes are empty when its called. Also by default it should return 5 bytes though the first time that SerialDataReciever is called it only contains 2 bytes, both of which are empty. Does anyone have any experience with this sensor? I'm not sure if I am using the SerialPort class correctly, but from what I've read I feel like it should work. Any help would be greatly appreciated. Thanks.
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