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Coding trouble

tech_nut81

Hi all. I was wondering if anyone more experienced than myself would be willing to take a look at this code and help me understand what's going wrong. I keep getting this error message, "error: unterminated argument list invoking macro "F".

 

I'll fill ya in on what I'm trying to do. I want to control the water level in a tank using a float switch, solenoid valve and the arduino. I was using just the float switch and solenoid valve connected through a relay, but whenever the water level would start dropping due to water usage, the solenoid would cycle on and off very quickly while keeping the water level up. What I want to do is have the arduino put in a 2 minute delay when the switch is activated so that the tank fills up smoothly.

 

Comments, suggestions and ideas are all appreciated.

 

DJ

Attachments:
Solenoid control.zip
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  • The F() macro is defined in WString.h, which is part of the core Arduino package. If I understand correctly, it stores a string constant in flash rather than RAM. Very useful in situations where RAM is limited.

     

    I believe your problem is in Firmware.ino on line 75:

     

    Serial.println(F("(2) 12V Solenoid Valve - 3/4""));

     

    You have mismatched double quotes here. The first double quote after 3/4 terminates the string. The compiler then expects to see either more arguments or a closing parenthesis, but it encounters another double quote instead. That's what "unterminated argument list" means.

     

    To resolve this, try escaping the first double quote:

     

    Serial.println(F("(2) 12V Solenoid Valve - 3/4\""));

  • in reply to andywest

    Thanks Andy!

     

    I see, that makes sense. It's vaguely coming back to me. (I don't use Arduino enough..).

  • in reply to shabaz

    No problem. I mainly knew about F() because I've been programming the Arduboy recently. I agree that it's a poorly named macro.

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