4 replies to this topic

[teraax]

I am currently unable to get the onboard switch to respond.  I noticed it today when I tried to put the Netduino into the bootloader mode.  I can still communicate with the Netduino through Visual Studio. 

 

I loaded the simple push button led program and the led will not light when the button is pushed.  I know the onboard led is working since it lights up during boot and I can control it with software.

 

I am using Visual Studio 2012 and have .Net MF 4.3, Neduino SDK 4.3.  The board has the 4.3.0.0 beta 1 (I was able to flash this on to the board previously).

 

I am thinking the switch is dead.  If so, is there anyway to get the board into the bootloader mode without the use of the onboard switch?

 

Thanks

[Chris Walker]

Hi teraax, You'll need to use the pushbutton to get the board into bootloader mode; it's physically wired to the "boot" pin. Is there any chance that some sort of liquid got into the pushbutton? If all else fails, try pressing it a half dozen times to help dislodge anything that's stuck in there. Also: if you write an app that just prints out the state of the button in a loop [ Debug.Print(button.Read(); ] -- does it stay the same whether you're pressing the button or not? Welcome to the Netduino community, Chris

[teraax]

I don't believe it have been in contact with any liquids.  I keep it in the bag and box that it was shipped in when it is not in use.  I do carry it around with me often between home and work so anything is possible.

 

I wrote the state of the button out to the console as you suggested and it does stay the same regardless of me pressing the button.

 

I haven't used the button in awhile.  I just happened to notice the problem when I was showing some one how to flash the firmware.

 

Looks like everything else is functioning normally.

 

Do you think it is possible to touch the leads on the switch with a jumper wire to complete the switch circuit?

 

Thanks

[Chris Walker]

Hi teraax, Yes, you can certainly touch the leads together on the button to simulate a button press. If the board is out of warranty, you may also consider mashing the button really hard ( but not with "board breaking strength" ) and seeing if that changes the output of your program. We've never had a report of a button failing in the field before, and we buy 10,000s of those buttons a year, but I suppose that all mechanical things can stop working eventually. If you have fine soldering skills, it's not too hard to replace the onboard button. Just be careful not to touch the iron to any other parts on the board. Chris

[teraax]

Thanks for the help.  I will see what I can do.