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Set the Netduino Date & Time

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#1 Robert L.

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Posted 26 August 2011 - 05:03 PM

I wanted to set the Netduino Plus System Date and Time from a string I receive from a server. The code is pretty straight forward, once you know the right methods to use. But it took more time than I care to admit to get this to work (Hey I am new to C# & .NET micro framework), so perhaps the code below will help someone else. This was tested on 4.2 RC1. It should be pretty easy to modify if your data is in a different format.

    // set the system's date and time from a string in this format:  "mm/dd/yyyy hh:mm:ss"
    public static void SetDateTime(string dts)
        var year   = Str2Int(dts, 6);      // convert each of the numbers
        var month  = Str2Int(dts, 0);
        var day    = Str2Int(dts, 3);
        var hour   = Str2Int(dts, 11);
        var minute = Str2Int(dts, 14);
        var second = Str2Int(dts, 17);
        System.DateTime dt = new System.DateTime(year, month, day, hour, minute, second);

    // convert a string to an "int"  stops at the end-of-string, or at the first non-digit found
    public static int Str2Int(string input, int offset)  
        int ret = 0;   // built the result here
        for( int i = offset; i < input.Length; i++)  // stop when all chars have been processed
            char c = input[i];      // get the next char
            if (c < '0') break;     // stop if a non-number is found
            if (c > '9') break;
            int n = (int)c - 48;    // convert the ascii value to a number, IE '1' = 49
            ret = n + 10 * ret;     // accumulate the result
        return ret;   // return the result to caller

#2 Valkyrie-MT


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Posted 26 August 2011 - 05:54 PM

I wanted to set the Netduino Plus System Date and Time from a string I receive from a server...

Nicely written! Looks like a great start! You also might want to look at this thread:



#3 Spork


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Posted 14 September 2011 - 04:09 PM

Looks like I just had a syntax error. The syntax checking / error reporting in Visual C# often seems to send me in the wrong direction.

Oops... Posted this on the wrong discussion. Disregard.

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