Grove-Base Shield and Relay Netduino Plus/Arduino

Developing relay that is controlled via buttons on website. I notice that relay was ON for Netduino Plus board and it was off for the ardiuno (EtherTen). I am using a Grove Relay that plugs into the Grove-Base shield. Apparently the Netduino Plust I/O pins set to high (3.3V) is there a way to set them to low(turn them off)?

Developing relay that is controlled via buttons on website. I notice that relay was ON for Netduino Plus board and it was off for the ardiuno (EtherTen). I am using a Grove Relay that plugs into the Grove-Base shield. Apparently the Netduino Plust I/O pins set to high (3.3V) is there a way to set them to low(turn them off)?

Aberkley,

How do you have the initial pin state? Is it set to false.

Dim led As New OutputPort(Pins.GPIO_PIN_D5, False)

That is for Visual Basic but it similar for C#.

The Netduino may boot with the pin positive but once booted should go to the initial state very quickly. If it doesn't you may be able to add a pull down resistor.

By the way welcome to the forum.

Chuck

Aberkley,

How do you have the initial pin state? Is it set to false.

Dim led As New OutputPort(Pins.GPIO_PIN_D5, False)

That is for Visual Basic but it similar for C#.

The Netduino may boot with the pin positive but once booted should go to the initial state very quickly. If it doesn't you may be able to add a pull down resistor.

By the way welcome to the forum.

Chuck

I do not set the initial pin state. The netduino probably does boot with the pin positive and they stay positive. I believe that it is a software issue I probably need to change a setting in the firmware.

Thank you for the suggestion

I do not set the initial pin state. The netduino probably does boot with the pin positive and they stay positive. I believe that it is a software issue I probably need to change a setting in the firmware.

Thank you for the suggestion

Aberkley,

Netduinos use the Digital ports in almost every application.

I wrote the following code to test it on my Netduino classic and it worked fine. With a voltmeter I had 3 milli volts when the button was NOT pushed, 3.3 vdc when the Onboard button is pressed.

using System;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using SecretLabs.NETMF.Hardware;
using SecretLabs.NETMF.Hardware.Netduino;

namespace Digital_Pin_Test
{
  public class Program
  {
    static OutputPort D1 = new OutputPort(Pins.GPIO_PIN_D1, false);
    static InputPort Button = new InputPort(Pins.ONBOARD_SW1, false,Port.ResistorMode.Disabled);
   
    public static void Main()
    {
      while (true)
      {
        D1.Write(Button.Read());
      }
    }
  }
}

For Visual Basic use:

Imports System
Imports System.Threading
Imports Microsoft.SPOT
Imports Microsoft.SPOT.Hardware
Imports SecretLabs.NETMF.Hardware
Imports SecretLabs.NETMF.Hardware.Netduino

Namespace Digital_Pin_Test
  Public Class Program
    Shared D1 As New OutputPort(Pins.GPIO_PIN_D1, False)
    Shared Button As New InputPort(Pins.ONBOARD_SW1, False, Port.ResistorMode.Disabled)

    Public Shared Sub Main()
      While True
	D1.Write(Button.Read())
      End While
    End Sub
  End Class
End Namespace

Good Luck,
Chuck