Serial Communication Syntax

Projects Programming
1

Hi, Hopefully someone can help me.

I am using an Arduino Mega to interface with a device which requires several parameters set up over serial for correct operation. The documentation for the device specifies that the serial string sent to it should be in the format

s

with 's' being the parameter i am trying to set up, being a value between 0 and 1 to four decimal places, and denoting a carriage return.

I would have thought that the below would work.

Serial.println("s0.2500");

However the device seems to just ignor this command.

I know the serial comms are working as they should as I am able to communicate with it successfully to change other parameters - The problem appears to be just when sending numeric values.

Can anybody see what I am doing wrong, or any suggestions for different methods would be appreciated.

Thanks in advance

2

I believe that Serial.println terminates with both a CR and an LF. I'm not sure whether they mean CR by or LF.

Try the following:

Serial.print("s0.2500\n");

And:

Serial.print("s0.2500\r");

to find out which works.

3

Hi Majenko,

Thank you for your quick reply.

Unfortunately both of those have the same result as println - the device just seems to ignor it =(

4

Do you have a link to the documentation of the device?

5

the device just seems to ignor it

Then maybe it's time for you to tell us what this mysterious device is, and how you KNOW it is ignoring the data.

6

And post all your code. What baud rate? Do you do Serial.begin()? Is it wired up correctly?