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Bernd's Content

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#53860 Powering Netduino Plus 2

Posted by Bernd on 07 November 2013 - 01:14 PM in Netduino Plus 2 (and Netduino Plus 1)

Ok.

Thanks for the help. If I understand it right it is not recommend to power the NP2 via the 5V pin. So I think I have find a alternative to powering the NP2. I find several boards that are able to pull up the voltage. So I will take the 7.2V of the accu pack an pull it up to 9V and connected that to the connector barrel of the NP2. This boards only costs 4-5€ so I think thats a save solution.




#53854 Powering Netduino Plus 2

Posted by Bernd on 06 November 2013 - 10:51 PM in Netduino Plus 2 (and Netduino Plus 1)

Hy sjmill01,

thanks for your answer. Do supply the barrel connector with a 7.2V accu pack or with really 7.5V ? Because my Problem is that i have only 7.2V or 5V. 




#53852 Powering Netduino Plus 2

Posted by Bernd on 06 November 2013 - 10:32 PM in Netduino Plus 2 (and Netduino Plus 1)

Hello,

I have a Problem with powering my netduino plus 2. I have a 7.2V accu pack that goes to a constant voltage power unit with 5V. So I have 7.2V or 5V to disposal. I don't want to use the USB Port for the power supply, because I have Change the USB connector every time when I would like to make changes on the Netduino. The round connector and the Vin Ports have 7.5V - 9V is this right ? Is there any possibility to supply the NP2 ?




#50516 I2C LCD not working on Netduino Plus 2

Posted by Bernd on 16 June 2013 - 02:08 PM in Netduino Plus 2 (and Netduino Plus 1)

I use the NP2 and the V4.2.2.2. If I get it right, I have to use a pull up resistor on both wire to the positive potential. The I2C Output is 3.3V . Can i connect the pull ups to 5V or is it still better to connect the resistors to 3.3V ? ******* I just found a thread in the board that answer my question. So i think the Outputs are in the Open Collector mode and so the high signal must generate via pull up resistors. So I can pull up to 5V. I think this must be fine



#50443 Netduino Plus Network Problem

Posted by Bernd on 12 June 2013 - 04:59 PM in Netduino Plus 2 (and Netduino Plus 1)

So I have make still some test. But I didn't get the right IP-Adress from the NetworkInterfaceClass, when didn't debug the netduino. Does anybody made a same experience with the this class ? Is the NP1 in the debug mode in the TinyCLR. Or is where a problem to get the right adress in the TinyCLR. Or does anybody have an another idea to the renew the address when DHCP failed during power up the system ?



#50404 Netduino Plus Network Problem

Posted by Bernd on 10 June 2013 - 06:39 PM in Netduino Plus 2 (and Netduino Plus 1)

I am not sure but I think there is a bug: 

Sub main()

While True

 If (Eth0(0).IPAddress = "192.168.178.33")) Then   Onboard_LED.Write(Not Onboard_LED.Read)   End If

  Thread.Sleep(1000)

End while

End Sub

When I debug the netduino the LED is blinking. When I stop Debugging and reboot the NP1, when the LED is not blinking but I can ping the Netduino with the IP Address 192.168.178.33. Thats strange I think or not ?




#50403 Netduino Plus Network Problem

Posted by Bernd on 10 June 2013 - 05:49 PM in Netduino Plus 2 (and Netduino Plus 1)

I think I have found the problem. So  when I powered up the Wireless N-Adapter Netgaer WNCE2001 and the NP1 together the NP1 doesn't get a IP-Adress. Before I am looking for a hardware solution I have tested a software solution:

While True   Onboard_LED.Write(False)   Thread.Sleep(1000)   If (Eth0(0).IPAddress = "192.168.178.33") Then   Exit While   Else   Eth0(0).ReleaseDhcpLease()   Thread.Sleep(5000)   Eth0(0).RenewDhcpLease()   Onboard_LED.Write(True)   Thread.Sleep(10000)   End If   End While

But now I have the problem that when I would like to Renew the IP-Adress it doesn't work. The NP1 always get IP 0.0.0.0 . I don't know where the problem is. Does anybody have got a suggestion ?




#50384 Netduino Plus Network Problem

Posted by Bernd on 09 June 2013 - 07:17 PM in Netduino Plus 2 (and Netduino Plus 1)

Hello Paul, I have the Version 1. And I have install the Firmware Version 4.2.0.1 . I have also Problems with the WinUsb driver. Sometimes the NP1 is not detects by Win7. When I download the program and are in the debug mode Ethernet is going well. Otherwise I have to powered up the board again and sometines the Board is detect by the ping command and sometimes not.I have same problem with the WinUSB driver too.



#50371 Netduino Plus Network Problem

Posted by Bernd on 09 June 2013 - 02:16 PM in Netduino Plus 2 (and Netduino Plus 1)

Hello,

I have got a problem with my netduino plus. I would like to communicate via Ethernet with a pc. In the netduino I configure a static IP Adress. After I powered up the netduino it sometimes doesn`t build up a connection to the pc. So I can`t ping the netduino plus. When I reconnect the board sometimes it works and sometimes it doesn`t work. So my first thought was that I have a problem in the programm. So I delete the program and I have the same problem again. Can anybody help me with this problem ?




#50271 NP1 Ethernet Receive Buffer

Posted by Bernd on 04 June 2013 - 08:49 PM in Netduino Plus 2 (and Netduino Plus 1)

Ok

Thanks ziggurat29 for your fast answer. I have googled about the netbuff_alloc() and I think you are right. At the moment I am very busy but than I have free time, I will make some tests about that with different size of packets. I will give you a feedback.




#50218 NP1 Ethernet Receive Buffer

Posted by Bernd on 03 June 2013 - 03:34 PM in Netduino Plus 2 (and Netduino Plus 1)

Hello,

does anybody know the size of the Transmit and Receive buffer of the NP1 ? I want to communicate via UDP with the NP1. The UDP packet has 512byte and so I  wonder this will work, or I have to take care to send only packets that are not larger as the receive buffer.

 

I read the documentation of the ARM7, but I don't understand the relationships of the fifo buffer with 28byte to the receive buffer. The receive buffer consist of several buffers with a length of 128byte. But how does this buffer communicate with the fifo buffer ?




#48959 NP powered over USB Hub with dc/dc power supply

Posted by Bernd on 02 May 2013 - 06:07 PM in General Discussion

Hello, For my roboter I'm looking for one power supply to supply the logic of the NP, MotorController etc. So I have the idea to take a USB Hub connect all the boards over micro usb cables. And when I would like to supply the usb hub with a dc/dc converter with 5V that i will supply over a battery pack. My experience in electricity is a little limited, so I am not sure that will work. Does anybody know if this will work.



#48884 Static electricity and perspex

Posted by Bernd on 30 April 2013 - 04:22 PM in General Discussion

Ok. Thanks for your answers. My roboter case has got a alu base plate and the roundly sides consist of perspex . On base plate i want to screw a perspex plate and on this i would like to mounting the NP board. So at first i want to use metall standoffs to install the NP. But you are right maybe it is better to use nylon standoff. But when I 'm understandig right, in normal using where is no problem to mounting this board on a perspex plate.



#48861 Static electricity and perspex

Posted by Bernd on 29 April 2013 - 09:51 PM in General Discussion

Hi I want to build a roboter with a perspex housing in that I want to integrated the Netduino board, motor and servo controller. Can I mount the NP directly on the perspex plate in the paerspex housing ? I don't know wether i have to do something against static electricity to avoid to damage the board ?



#42556 Problem with PWM Setpulse

Posted by Bernd on 01 January 2013 - 07:58 PM in Netduino Plus 2 (and Netduino Plus 1)

Ok I found the problem. I have done a firmware update and now it works correctly.

Does anybody know where I can find the Wiki Pages ?




#42543 Problem with PWM Setpulse

Posted by Bernd on 01 January 2013 - 01:55 PM in Netduino Plus 2 (and Netduino Plus 1)

Hello,

 

I want to control a servo directly over the NP, via the PWM Port10. So I write the following code sequence:

 

Servoposition1.SetPulse(20000, 1500)

 

But it doesn't work. So the Signal must be 20ms Peak To Peak and the duration must be 1.5ms ? Or not ?

So I have control the signal with an Oszi and it shows 40ms Peak To Peak and a duration of 3.8ms ?

Does anybody know there the problem is ?

 




#40179 Netduino Plus 2

Posted by Bernd on 25 November 2012 - 08:11 PM in Netduino Plus 2 (and Netduino Plus 1)

Ok thanks Chuck for the answer. I search this topic on the forum but I didn't found it. Ok so I think I can supply the Netduino P2 directly with 7 akku cells, because the current I need from the NP2 is low.



#40173 Netduino Plus 2

Posted by Bernd on 25 November 2012 - 06:54 PM in Netduino Plus 2 (and Netduino Plus 1)

Hello, I would like to buy the Netduino Plus 2. But I saw that the maximum Voltage on the barrel jacket ist up to 9V. The netduino plus has 12V. How can I supply it over the battery ? I would like to use Baby size. So I need 7 cells (7x1.2 =8.4V). Can I use this or is where a danger with overvoltage because the batteries have voltage fluctuations. Has anybody expierence with this ?



#39384 DFRobot Power Shield DFR0105

Posted by Bernd on 14 November 2012 - 09:55 PM in Netduino Plus 2 (and Netduino Plus 1)

Hello, I want to use my netduino plus with a motor and Servo control shield (6V). So I'm looking for a power supply that fits to that system and I can supply the netduino plus motor and Servo with one battery pack. So I saw the power shield from dfrobot. But I can't find a documentation for that shield that is answer all my questions. The pin outs I think are compatible with the netduino plus. Thers are severals LED with 5V 3.3V 9V and 12V. - When I put a 7,2V power supply on the Input port of the power shield will the netduino supply over the Vin Port with 5V ? - Can anybody tell me the max current of the 5V power from this shield ? - What means the LED 5V,3.3V,9V and 12V ?




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