Doh!!! - I assumed the black was the ground wire but you are right! It now works.. Thanks alot for your info. Excellent stuff. I have also cleaned up the code and removed references to EnableInterrupt() and ClearInterrupt()

Hi Waxie,

You mind pasting your codes here?

I am actually wondering how do you test your device, is there anything around your sensor device? It is because when i try to test, i placed the device in a box and still the outcome stated 'Motion detected'.

 And,when u test the program does the outcome stated Motion Detected even though we did not hover above the device? 

Hi Chris,

Yes, I did few times holding down the pushbutton, and the LED does not turn off too. The LED stays on. There is nothing appear on the PC. Did alot of different ways to overcome this problem but to no available. 

Hi,

I have the same problem. Even though i did the re-flash few times before, but this time is quite strange for me. The USB cable cannot detect to the PC, its not even to the bootloader mode. Tried on other PC and used other cables, but the problem still the same. Is there any other way to reset/erase the Netduino Plus 2?

Hi,

I have 2 questions regarding about PIR Sensor. I am using Netduino Plus 2.

1) Is it a need to have a resistor on it? Because, if i set it to Disabled, I need to wave a lot of times over the sensor for it to detect and after detecting it, it will keep on going print out the output even when i stop waving. If i set it to PullUp with 1K resistor without wave over it, it will automatically print the output.

2) I have insert the interrupt handling together with it, and the outcome seems to be ongoing even if I have stop waving over it. I want it to print out the output once upon detecting the motion, and stop, and print once again upon the next waving.

Here are my codes. I got it from this forum.

using System;using System.Net;using System.Net.Sockets;using System.Threading;using Microsoft.SPOT;using Microsoft.SPOT.Hardware;using SecretLabs.NETMF.Hardware;using SecretLabs.NETMF.Hardware.Netduino;using System.Collections;namespace Motion_Sensor{    public class Program    {        static OutputPort led = new OutputPort(Pins.ONBOARD_LED, false);        static InterruptPort PIR =             new InterruptPort(Pins.GPIO_PIN_A0, false, ResistorModes.PullUp, InterruptModes.InterruptEdgeLow);public static void Main()        {            // write your code here            Debug.Print("Wave!");            Thread.Sleep(1000);            PIR.OnInterrupt                 += new NativeEventHandler(motion_OnInterrupt);              Thread.Sleep(-1);        }        static void motion_OnInterrupt(uint data1, uint data2, DateTime time)        {            PIR.DisableInterrupt();            Debug.Print("Found movement ");            led.Write(true);                        Thread.Sleep(3000);            led.Write(false);            Thread.Sleep(3000);            PIR.EnableInterrupt();        }}}

Hi Chris,

I managed to solve the problem. Yup,thanks for the help Chris!

Hi Black Rose, When you power on your Netduino Plus, does the blue LED go out after a few seconds (indicating that it has booted)? If so, try to erase your current Netduino app: 1. Unplug your Netduino Plus and all components 2. Open up MFDeploy on your computer, select USB transport 3. Hold down the pushbutton on your Netduino Plus. This will force it into bootloader mode. 4. Connect your Netduino Plus to your PC (and keep holding the button). 5. Within 2 seconds, press the ERASE button in MFDeploy. Does that fix things for you? Also...after that, I'd recommend upgrading to the lasest firmware (v4.1.0.6 or v4.1.1 alpha 7+). Chris

Hi Chris,

I have the same problem too, after ive upgraded the firmware to 4.2,2. But when plugged into the USB, the LED is not blinking. However there is an error message saying that "There were deployment error. Continue?" and error output message " Unable to communicate with device - USB:Netduino"..

I encountered this problem before. The first was i need to change the hardware. So,i am afraid if the problem i faced is similar like before.

Your help is kindly appreciated!

I did follow what u had mention earlier on but I could not get to the output. There was no error when i run it.

Could you show me how to code? Sorry for the trouble

Hi zee.

 

Since there aren't any static methods in the class and the class itself is not static, you must create an instance.  And you create it using the only constructor provided.  That constructor takes in one argument which is an analog pin.  The code in the constructor initializes the _sensor AnalogInput property.  So once you instantiate the class, _sensor will not be null.

Hi phantomtypist

I had a Humidity Sensor - HIH 4030 and decided to try it out for my research lab. Unfortunately, i faced with an error on this ( 'HumiditySensor.HIH4030._sensor' is never assigned to, and will always have its default value null ) I did change some of the code into SecretLabs. The red font is the error i am facing. Could you tell me what is the problem.

This is code for the Honeywell HIH-4030 humidity sensor (SparkFun SKU: SEN-09569).

Please note that the sensor is supposed to be used with 5v input, but it works just fine with 3.3v input because the output is linear.

The code below is tailored to 3.3v input.
 

    /// <summary>    /// Honeywell HIH-4030 humidity sensor (SEN-09569).     /// Please note that the sensor is supposed to be used with 5v input,     /// but it works just fine with 3.3v input because the output is linear.    /// The code below is tailored to 3.3v input.    /// </summary>    public class HIH4030 : IDisposable    {        private AnalogInput _sensor;        private bool _disposed;        protected virtual void Dispose(bool disposing)        {            // Check if Dipose has already been called.            if (!_disposed)            {                if (disposing)                {                    _sensor.Dispose();                    _disposed = true;                }            }        }        ~HIH4030()        {            Dispose(false);        }        public void Dispose()        {            Dispose(true);            GC.SuppressFinalize(this); // tell the GC not to finalize.        }        public HIH4030(Cpu.Pin analogPin)        {            _sensor = new AnalogInput(analogPin);            _sensor.SetRange(0, 3300);        }        /// <summary>        /// Calculates the relative humidity with temperature compensation.        /// </summary>        /// <param name="temp">Current temperature in Celsius.</param>        /// <returns>Returns the relative humidity as a percentage.</returns>        public double RelativeHumidity(float temp)        {            // Get the humidity sensor reading.            int sensorReading = _sensor.Read();            // Calculate the humidity sensor voltage.            double sensorVoltage = (((double)sensorReading / 3300) * 3.3);            // Define the voltage the sensor returns at 0% humidity.            double zeroVoltage = 0.528;            /* It has been observed that some sensors are consistently              * inaccurate and off by a certain voltage than what they              * should be.  Use this variable to compensate for what the              * voltage should be if needed. */            double calibrationVoltage = 0.00;            /* Determine the maxium voltage of the sensor with                 temperature compensation. */            double maxVoltage = (2.1582 - (0.004426 * temp));            /* Determine the temperature compensated relative humidity                 as a percentage. */            double rh = ((sensorVoltage + calibrationVoltage - zeroVoltage) / maxVoltage) * 100;                        return rh;        }            }

Here's the program.  

Sorry again..

Here's the attached of the program. Sorry again..

Here's the attached of the program. 

Sorry again..

Here is the code of the program. 

Sorry again.

Hi Omar,

I followed your C# for analog but when run the program, it stop by itself. Is there anything that i missed out??

Btw, where should i print out the distance?

Sorry.. the PWM i editted it to SecretLabs.NETMF.Hardware.PWM speaker = new SecretLabs.NETMF.Hardware.PWM(Pins.GPIO_PIN_D5);

Hi Stefan,

Here's the code below:

Thanks for your help!

Hi,

I got an error when deploy piezo. An error message box pop up "An unhandled exception of type 'System.Exception' occurred in mscorlib.dll".. Can anyone please help me where is the problem?

Sorry Stefan.. My typo error.. Instead of 'i', I accidentally typed '1'..

instead of :

Sorry for the Inconveniences cause..

Hi and welcome to the Netduino forums!

 

The book describes the Netduino API, I think your problem would be fixed if you'd remove the reference to Microsoft.SPOT.Hardware.AnalogInput.dll and add a reference to SecretLabs.NETMF..Hardware.AnalogInput.dll

After following your instructions, there are more errors.. Anyway i am new to this Netduino Plus 2.. Could you please explain to me in detail? Thank you.

Refer to the attached.

How was the problem solved? I'm facing the exact same problem now.

 

number 6 seems to be just a matter of changing int potValue=0; to double potValue=0;

I include the SecretLabs.NETMF.Hardware.AnalogInput command infront & add reference 'SecretLabs.NETMF.Hardware.AnalogInput..

eg:

SecretLabs.NETMF.Hardware.AnalogInput pot = new SecretLabs.NETMF.Hardware.AnalogInput(Pins.GPIO_PIN_A0);

Hi,

I am using Netduino Plus 2 and I followed the steps from 'Getting Started with Netduino' pdf on Chapter 5. I encountered few problems on the coding. There are 4 errors. Please help me!

Looking forward to your speedy response. Thank you!

Problem solved ! Thank you !

Hi..

I have a problem with the LED color. I am still unsure what is the problem. After typed out all the codes with no error and run the program, the red LED did not even light up at all, the green LED color is so little which hardly to see it, and the blue LED is so bright. I used 100 ohm resistor on red, 105 ohm resistor on green and 250 ohm variable resistor on blue. I have try to swap the resistor but the outcome is still the same. Could anyone please guide me what is the problem here?

You are correct in that the resistors will vary for different color LEDs but they can also vary for different types of LEDs.  What RGB LED are you using?  May need to look at the specs and recalculate the resistors.  Additionally what power source are you using? 3v? 5v? 12v? and are the LEDs common cathode or common anode?

I am using the RGB Diffused Common Cathode [https://www.sparkfun.com/products/9264]. I did not connect any power source when running the program. I did the same thing as the diagram given. Is my resistor value correct? Connect to red with resistor of brown, black, brown, gold. Connect to green with resistor of brown, black, green, gold. Connect to blue with 250 ohm variable resistor. I have another resistor i have not try which is red, black, orange, gold.

Your guidance are really appreciated

Hi Dave,

I have changed the output type, and it exit the program by itself immediately. The Main() method is suppose to comment out or uncomment?

If i comment out, there is an error saying does not contain static Main. If i uncomment, it exit the program.