And a ground to both boards.

Quote:

And a ground to both boards.

To each other, since they are grounded through the power right? To any ground on the Mega, I've grounded the LEDs at the ground next to pin 13

I recommend looking at post 24 at https://synthiam.com/Community/Questions/10451&page=3

You have to have a common ground for the EZ-B to communicate to the Arduino.

You can do this from any digital or analog pin on the EZ-B, or from the UART port. TX from the EZ-B (or any digital pins signal wire) to the Arduino can carry the send data from the EZ-B to the Arduino on its RX pin.

If you need to receive data on the EZ-B, you need to have the TX pin from the Arduino connected to the RX pin on the EZ-B. At this point it also is logical to use the UART port on the EZ-B for this and use the TX port on the EZ-B to connect to the arduinos RX port.

Ground is Ground so it doesnt matter which ground pin you use on the arduino or EZ-B but for simplicity sake, I would use the ground pin that matches the signal pin on the EZ-B (digital or uart depending on which way you wire) to the ground pin that is beside the TX and RX pins on the Arduino.

To see how to send data to the Arduino, and then catch it and process it in the Arduino sketch, I would look at the thread posted above for examples.

Ok, I have it connected but I'm sending my command to the wrong pin. I have connected to UART0

Now when I send the command

sendSerial(0, 9600, "on")

The servo I have plugged into D0 clicks. How to I find what I'm doing wrong?

Thanks

If you are connected to the uart port of the ezb then why are you using sendserial commamds? It is also not in the proper format anyway... I am not sure what you are trying to do but if you are trying to send commands to your arduino you need to use the uart command ( since your arduino is connected to it... Or are you trying to move a servo plugged into the ezb? I am on my phone so i have to show the code this way Uartinit(0,0,9600) UartWrite(0,0,"on") I am away from my pc so i can't confirm the right syntax at the moment...

If you are just trying to move a servo plugged into D0 on your ezb the correct syntax is.... Servo(D0,90) # moves the servo to 90 deg

as Richard stated, if you are connecting to the UART port and not a digital port, the command you are using wont work. I am in my shop right now and dont have access to ARC. In the script you have an option to see the available commands. You can search for UART and see the available commands for the UART port. This should get you there.

I'm using UART and the wrong command, thanks.

Okay, back at my desk now.

I haven't tested this out but I would do something like this in a script.

if(UARTAvailable( 0, 0 ))
    UARTWrite( 0, 0, "Whatever you want to send here" )
else
   UARTInit( 0, 0, 9600 )
   Sleep(500)
   if(UARTAvailable( 0, 0 ))
      UARTWrite( 0, 0, "Whatever you want to send here" )
   else
      SAY("I can't communicate with my light controller")
   end if
end if

I get an error message-

Error on line 1: Missing 2 closing statement (ENDIF/ENDREPEAT/ENDREPEATUNTIL/ENDREPEATWHILE/etc)
Done (00:00:00)

I tried running just

 UARTWrite( 0, 0, "on" )

I get a done message, but my lights don't turn on. They are plugged in correct, I tested them before changing it to the code above. If I reupload the sketch, the light on pin 13 blinks.

I put the UARTthe Init( 0, 0, 9600 ) in the connection script area.

Dave, your code in the previous response doesn't make sense. Checking UartAvailable() returns the number of bytes in the input buffer.

Also, kashyyk, the error you are receiving is telling you exactly what is missing. Read the error and understand each word in the sentence. Just like you are reading my response, the error message is also a sentence. It's telling you something

Don't use words for commands like "ON" or "OFF". Create a protocol instead. If you simply use a BYTE (0-255), then you have 255 different commands to send. You can make it so some commands have parameters, but don't use the word "ON" or "OFF", that's getting into writing console commands for user interfaces and entirely out of scope for the question.

Look at the EZ-B protocol if you need an example of what a protocol looks like. You can view it here: https://synthiam.com/Tutorials/Lesson/18?courseId=4

Here is working sample code...

ARDUINO

int led = 13; // Pin 13

void setup() {

  pinMode(led, OUTPUT); // Set pin 13 as digital out

  // Start up serial connection
  Serial.begin(9600); // baud rate
  Serial.flush();
}

void loop() {

  // Wait until there is data
  while (Serial.available() > 0) {

    int input = Serial.read();

    if (input == 33) 
      digitalWrite(led, HIGH); // on
    else if (input == 44)
      digitalWrite(led, LOW); // off
  }
}

EZ-SCRIPT

UARTInit(0, 0, 9600)

:loop

  sayezbWait("I am turning on LED")
  UARTWrite(0, 0, 33) 

  sleep(4000)

  sayezbWait("I am turning off LED")
  UARTWrite(0, 0, 44) 

  sleep(4000)

goto(loop)

Thanks for the correction DJ. What I was doing in my C# project didnt transfer well here.

Thanks DJ! I'll try it out later this afternoon.