I hope I could get help with this project I have been reading a lot trying to get it to work. I am trying to communicate Netduino Plus that has an Xbee on top of it with a shield and a potentiometer connected to the A0 Pin for input, I created this Netduino application and i can debug and see different readings when I change the potentiometer:
using System;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using SecretLabs.NETMF.Hardware;
using SecretLabs.NETMF.Hardware.Netduino;
using System.IO.Ports;
using System.IO;
namespace XBeeTest
{
public class Program
{
public static void Main()
{
SerialPort serialPort = new SerialPort("COM1", 9600, Parity.None, 8, StopBits.One);
serialPort.ReadTimeout = 0;
serialPort.Open();
// 1. connect the middle pin of the potentiometer to A0
// 2. connect the other pin of the potentiometer to GND
// 3. connect the other pin of the potentiometer to 3.3v
AnalogInput inputPort = new AnalogInput(Pins.GPIO_PIN_A0);
try
{
while (true)
{
// read the value
int potentiometerValue = inputPort.Read();
// some required convertion
float analogConversion = (float)potentiometerValue / 1023 * 3.3f;
// then we will prepare sending the message
byte[] buffer = new byte[analogConversion.ToString().Length];
// convert the string to bytes
buffer = System.Text.Encoding.UTF8.GetBytes(analogConversion.ToString());
// write it to Xbee through serial
serialPort.Write(buffer, 0, buffer.Length);
// wait 500 seconds
Thread.Sleep(500);
}
}
finally
{
serialPort.Close();
}
}
}
}
I am assuming after I run this one on the Netduino plus with xbee, I can unplug it from the PC and connect it to the battery and it would still do the same right?
OK, at the other Xbee that I connect to the PC, I created a console app to read the serial port and print out the potentiometer readings and here is the code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO.Ports;
namespace WirelessAlarm
{
// Console program for receiving the data
class Program
{
static void Main(string[] args)
{
SerialPort sensor = new SerialPort("COM3", 9600, Parity.None, 8, StopBits.One);
int bytesToRead = 0;
bool isPlaying = false;
string message;
sensor.Open();
try
{
while (true)
{
// check if there are bytes incoming
bytesToRead = sensor.BytesToRead;
string strbytesToRead = sensor.ReadExisting();
if (bytesToRead > 0)
{
byte[] input = new byte[bytesToRead];
// read the Xbee's input
sensor.Read(input, 0, bytesToRead);
// convert the bytes into string
message = System.Text.Encoding.UTF8.GetString(input);
// message contains the string we received from the Serial port
// TODO: put the code here to do something with the message
}
}
}
finally
{
sensor.Close();
}
}
}
}
for some reason, I get nothing on the console app in the "bytesToRead", what am I doing wrong? I hope this makes sense.
Thanks,
Shehab
