2 replies to this topic

[zimmersm]

Hi everyone, 

I am experiencing a kind of odd problem having to do with SerialPort on the Netduino 2 Plus.  In a black project, I can successfully create, open, and write to COM1 (pins D0 and D1).  However, I am using NeonMika Webserver in my project to host a web interface.  When in this project, my SerialPort will not open.  Here's the code below. Thanks! 

using System;
using System.Net;
using System.Net.Sockets;
using System.Collections;
using System.Threading;
using System.IO.Ports;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using SecretLabs.NETMF.Hardware;
using SecretLabs.NETMF.Hardware.Netduino;
using NeonMika.Webserver;
using NeonMika.Webserver.Responses;

namespace HomeAutomation
{
    public class Program
    {
        public static SerialPort serial = new SerialPort(SerialPorts.COM1, 9600);

        public static void Main()
        {
            serial.Open(); // error is thrown here and breaks the program

            Server server = new Server(PinManagement.OnboardLED, 80, false, "192.168.1.120", "255.255.255.0", "192.168.1.1", "netduinoplus");
            //server.AddResponse(new XMLResponse("send", new XMLResponseMethod(Program.Send)));
        }

[Chris Walker]

Hi zimmersm,

Two things:
1. Are pins D0 and D1 being used anywhere in the libraries?
2. Try moving the "= new SerialPort" code to your main class. The order of instantiation in NETMF is a little different than in other flavors of .NET.

Welcome to the Netduino community,

Chris

[Jack Chidley]

Chris, is this instantiation order documented somewhere? I recall another post about networking where there were differences from other .net implementations too.

Jack