#WWW ROBOTC NET HOW TO#
#WWW ROBOTC NET CODE#
#WWW ROBOTC NET BLUETOOTH#
#WWW ROBOTC NET DOWNLOAD#

#WWW ROBOTC NET CODE#

It seems to me the concepts set out by the RobotC code offers the perfect solution. I have spent many hours on trying to come up with a way to get the bot to travel in a straight line using some aspect of PID that is not overly complex for this relatively simple task. It uses integers only and math that does not result in floats. If the motors moved at exactly the same speed, this value would be 0.Р”Р„nother important aspect of the RobotC straight line code is it does not use floats or other data types that consume large amounts of microprocessor resources. Negative if slave has to slow down, positive if it has to speed up. My limited programming experience/skills do not allow me to simply translate RobotC to an Arduino sketch C which I am currently learning.Р”Р„s explained at the above web page the difference between the master encoder and the slave encoder ticks can be used to determine error. This concept was presented at the web page below which uses RobotC for programming. In this situation Error = speed_Master - speed_Slave However, as expected, the bot cannot travel in straight line.Р”В¬oncept: Keep it simple by having one motor serve as the speed master and the other as a speed slave, where the master motor speed is held constant and the slave motor speed is varied so as to match the master motor speed. Great precision is not needed for this challenge therefore, limited tracking (drift) back and forth across the straight line path is acceptable.Р”В¬urrent situation: The bot has been tested and it goes forward, backwards, turns etc.

#WWW ROBOTC NET HOW TO#

Hobbyist Situation: Good hardware/electronics skills, just learning how to program.Р”В¬hallenge: Creating a sketch that will allow the bot to travel in a straight line for some distance, turnaround and travel back to the start point. Run the programs as per the instructions for the samples above, and observe the results on the NXT screen.Project: Arduino robot with motors equipped with hall effect quadrature encoders. These are essentially the same programs as above, except these will allow you to send through 3 values where the above programs would send only one value at the time.

Checking for a message every half a second is NxtDisplayBigTextLine(2,'1: %d',my_message) Display the value as stored in the variable LetРІР‚в„ўs say something got through if the signal is not zero LetРІР‚в„ўs wait a bit and send something else

Then move on to the slightly more useful programs below. If you do that, you can nicely repeat the procedure and wait for a message to come in. After storing this value in a variable for further usage, use ClearMessage() to set the values back to 0 (erase your email inbox). So, if you find something that is not 0, thatРІР‚в„ўs the value that was sent by the other NXT. If thereРІР‚в„ўs no message, youРІР‚в„ўll find 0 as the message. The only issue here is that this mailbox will hold only one email, so old messages are overwritten when new ones come in. You wonРІР‚в„ўt miss it, it will be in the mail box. So, thereРІР‚в„ўs no need to check every milisecond of the day. But like email, messages are stored for your review until you open them. YouРІР‚в„ўll never know youРІР‚в„ўve got a new email unless you check. Think of it as emails you get from a friend. The key is that you have to keep looking for messages on the receiver part. IРІР‚в„ўve added some comments to the code to help you understand what each portion of the code does. When you do this, the number 23 shows up on the receiving NXT.

Transfer SenderSimple.c to your other NXT.

Use USB for this! (Bluetooth will be in use between your NXTРІР‚в„ўs.)

#WWW ROBOTC NET BLUETOOTH#

I assume that your NXTРІР‚в„ўs are connected via Bluetooth (see РІР‚Сљset upРІР‚Сњ section). The next examples (SenderSimple.c and ReceiverSimple.c) demonstrate the functionality to send one value from one NXT to another. In some occasions you want to send some basic numbers from one NXT to the other.

The symbol in the top left of the screen indicates that your NXTРІР‚в„ўs are connected.

Choose the NXT that you want to connect to.

(Only the first time) Go to Bluetooth > Search.

Connect the NXTРІР‚в„ўs using the menu on the NXT brick:.

#WWW ROBOTC NET DOWNLOAD#

You can just copy paste the code from below, or download all 4 sample programs.

Newer versions may have issues with this code.

This code was tested with RobotC 3.08.

(You can use bluetooth with NXT-G, too, but thatРІР‚в„ўs not discussed here). This page will show you two sets of programs that demonstrate the most basic Bluetooth example programs for two NXT with RobotC. ThatРІР‚в„ўs apparently a bit tricky, but itРІР‚в„ўs really not difficult if youРІР‚в„ўve got a simple place to start.

Bluetooth is a cool feature and itРІР‚в„ўs especially fun if you can make it work.

Www robotc net