Shadi, The trouble is that I'm not getting any interrupt on a echo port.

Still didn't work. If I use PIN4 it gets stuck in while (lineState == false). If I connect it to PIN5 it gets stuck in while(lineState).

 

Also when I connect it to PIN13 every time the port Writes(true) or false, it turnes on or off netduinos blue LED. 

 

What am i doing wrong?

 

Thanks,

Ruben

        private int GetDistance()        {            // First we need to pulse the port from high to low.            _port.Active = true; // Put port in write mode            _port.Write(true);   // Pulse pin            _port.Write(false);            _port.Active = false;// Put port in read mode;                bool lineState = false;            // Wait for the line to go high, for start of pulse.            while (lineState == false)                lineState = _port.Read();            long startOfPulseAt = System.DateTime.Now.Ticks;      // Save start ticks.            // Wait for line to go low.            while (lineState)                lineState = _port.Read();            long endOfPulse = System.DateTime.Now.Ticks;          // Save end ticks.             int ticks = (int)(endOfPulse - startOfPulseAt);            return ticks / 580;        }

adsf

I modified the code from here,

http://forums.netdui...asures-jumping/

 

and the files are here for Netduino Plus 2 (in VB),

https://www.dropbox....0a7Geue?v=0mwng

 

The cheap HC-SR04 modules are spotty at best. I wasted a lot of time with a bad one. The above code works just fine. I merely added some smoothing routines. The module is powered from the Netduino 5V pin.

 

Thank you, I will try to use and see how it works.

Are there any limitations on the pins which I can use?

Hi Everybody,

 

I'm having troubles with making the sonar sensors work. I used both Parallax Ping and HC-SR04, but neither of those worked well.

 

The problem with HC-SR04 is that I'm always getting -1 as result. The code is from this library: http://forums.netdui...ic-rangefinder/

Tried connecting to different digital pins but it didnt work either. Powering from 5V pin of the netduino. Is there anything I'm missing?

 

The Parallax Ping works "sometimes".  If it works i get correct distance result. The trouble with this one is that sometimes it gets stuck in following loop:

while (lineState)lineState = _port.Read();

Using this code:

http://forums.netdui...rasonic-sensor/

 

Are those sensors sensitive to the power source? Running from USB. 

 

Any help is highly appreciated.

 

Thansk,

Ruben

 

P.S. I use Netduino Plus 2 with latest firmware 4.2.2.

 

 

 

 

Guys, I ran into a same issue. 

I might try to burn tow ports at this point. Could you please share the code for this?

 

Thanks,

Ruben

I prefer to use separate supplies for logic and motors.

My Netduino became erratic when it shared the same battery pack as my buggy's motors.

 

Paul

 

Yeah, i felt that too..

First of all thanks for sharing this piece of code. When the using the parallax ping alone this piece of code works fine. But sometimes when using it together with servos and motors it gets stuck the the while loop. Is this something anybody else experienced? I'm using external 5v power source for all components. Also, is there a way to make this utility work in an asynchronous way where instead of waiting for signal in a loop I could get an interrupt and process it.

Hi Everybody, I'm new to netduino. Just want to see if there is a centralized library which supports various hw components line servos, ir/sonar sensors, LCD screens, etc. I've some bits of code here and there just want to know if somebody has a chance to put them together, Thanks, Ruben

Thank you Paul! The external power works perfectly for the servo. It cleans up lots of servo noise.

Hi Everybody,

 

I'm new to netduino. I've seen this topic discussed in the forum but couldn't find a good answer. So decided to ask.

 

I want to control a regular servo used in rc toys. This would be analog or digital servo with 4.8V - 6V power range.

As i understood the netduino will provide 3.3V. I'm thinking about providing the power from an external source. 

 

Can somebody help me how to do that? Would i need to connect the + wire to my external power source, then the - from the external to the ground of netduino, and the signal of the servo to one of the PWM pins? I'm bit worried about the ground. wouldn't this fry the board? If somebody can show me photos or schematics of the wiring I would really appreciate!

 

Thanks,

Ruben