4 replies to this topic

[thkaw]

Today I test Netduino 3,

In spec, it said which have 4 COM Ports

 

I test COM1,3 by using UART Camera.

And it works fine, read all information and data i need.

 

 

But in COM2, it won't have any respond.

Not detect any UART device.

 

But same program change to using Netduino Plus 2, it working.

 

 

So I change a brand new Netduino 3, and test COM2.

But still can't using only COM2.

 

 

Is there have know issues in Netduino 3 COM2?

 

 

My Camera baud rate is in 115200

 

[Chris Walker]

Hi thkaw,

What header pins are you using for COM2? Did you try swapping TX/RX?

Chris

[thkaw]

Hi thkaw,

What header pins are you using for COM2? Did you try swapping TX/RX?

Chris

 

Hi Chris, sorry for late reply.

 

Yes, I tried swapping TX/RX. But both of my 2 pices Netduino 3's COM2 still unresponse.

[Tom]

I'm having the same issue with an app i'm porting from the n2plus to the n3. COM1 works as expected, but COM2 is unresponsive. Both working perfectly on the n2plus. Connected on D2 (RX -- TX on external device), D3 (TX -- RX on external device). 

new SerialPort("COM2", 115200, Parity.None, 8, StopBits.One);

[Tom]

Following up on this, it would appear that COM2 TX is working, as the device i'm connecting to on COM2 is responding to commands sent, but I'm not receiving confirmations back. 
Same code, device swapped to COM1 and it works as expected. COM3 & COM4 also work as expected. 

Dud board? Software Bug?

Both D2 & D3 work successfully with OneWire devices...