newfierich

Hello all. Wondering if anyone was successful in creating checking checksums in NMEA messages? Problem I am having is that .net micro does not have a Convert class... Has anyone on the forum been successfull in calculating NMEA checksums? http://www.codepedia... NMEA Checksums

Wondering if anyone has tried or has working code on how to connect netdruino to a MySql db.

I am having issues in Encoding UTF8 from a byte array. The byte array is coming from a GPS Unit via an UART. It works fine most of the time, but when I plug it in or unplug it, sometimes I get an error. Here is the line of code I am using to convert the byte array:

GPSMessage = new String(System.Text.Encoding.UTF8.GetChars(GPSbuffer));

Here is the error trace:

    #### Exception System.Exception - CLR_E_WRONG_TYPE (3) ####
    #### Message: 
    #### System.Text.UTF8Encoding::GetChars [IP: 0000] ####
    #### NetduinoPlusAHRSTest.Program::Port1_DataReceived [IP: 002e] ####
    #### System.IO.Ports.SerialPort::DataEventHandler [IP: 0016] ####
A first chance exception of type 'System.Exception' occurred in mscorlib.dll

I believe I am getting these errors because UTF8 takes two bytes per char. By plugging in the unit, it has a 50/50 chance of picking up the stream in the right orientation. Likewise if I unplug the GPS unit, there is a 50/50 chance that the last char might be missing a byte... I am wondering how do I work around this? I attempted doing a try{} Catch{} around the Encoding line, but errors are still raised from time to time.

Any help would be appreciated. Let me know if any of my logic of why I am getting these error from time to time are incorrect.

Hello all, I am new to the Netduino Plus and have just started to play with its Ethernet capabilities. I am wondering if it is possible to download a full file from an Ethernet connection. Are there any examples of this online?

I am wondering if there is a way to setup a interrupt for when there is data to read on a serial port. I was hoping to do something similar to the event handlers button revisted example but apply it to one of the UARTS..