What is a "stray '\302' ?

Projects Programming
1

I have the sketches MasterSwapRoles and SlaveSwapRoles downloaded from
http://forum.arduino.cc/index.php?topic=421081.0

In both cases, attempted compilation raises

Compiling sketch...
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10612 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\standard" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src" "-ID:\Documents\Arduino\libraries\RF24" "C:\Users\Rick\AppData\Local\Temp\arduino_build_124292\sketch\SlaveSwapRoles.ino.cpp" -o "C:\Users\Rick\AppData\Local\Temp\arduino_build_124292\sketch\SlaveSwapRoles.ino.cpp.o"
SlaveSwapRoles:16: error: stray '\302' in program

 RF24 radio(CE_PIN, CSN_PIN); // Create a Radio

 ^

What is a "stray '\302' "?
How do I get the code to compile?

Note: I am using Arduino 1.6.12, RF24 (TMRh20) v1.1.7, and Firmata v2.5.4.

2

It compiled OK for me. Try pressing the "Select" link above the code and then copy and paste. You might have brought in an unintended extra character.

3

Nope! Here is the compiler printout for MasterSwapRoles cut and pasted into NotePad because it's too long to insert in this post.

MasterSwapRoles.txt (30.2 KB)

4

It means a weird character that you can't see is inserted in the code somewhere - usually for me they are close to {} or []

Do you have an alternate text editor that shows invisible characters? If so open your code there, and look for the culprit where the compiler complained.

Alternatively re-enter manually (no copy paste as you would take the invisible character along) that full line manually and delete the other one where compiler complains

5

I have tried WordPad, NotePad, GPS (Ada IDE), DevC (C++ IDE) and Word with Display --> Hidden Text set. None of them show hidden characters.

I have even tried going to the places the compiler identifies and backspacing back to the next line to clear any rubbish, then ENTERing forward a bit. Error still appears.

If someone has this code and it compiles okay, would you mind attaching it to a post so I can get at it. Thanks.

BHTW: I have just 'upgraded' to Arduino 1.6.12. Could this be some new spell cast on the editor?

6

Here they are. Both compile fine for me with Arduino IDE 1.6.12.

MasterSwapRoles.ino (1.99 KB)

SlaveSwapRoles.ino (1.94 KB)

7

Thanks pert

Now the BIG question: "How do I get them working together?"

They both compile, they both upload to the UNOs, they both Serial print some output.
They don't appear to communicate.