'Particle' was not declared in this scope

Troubleshooting
1

I am using the Web IDE to compile two previously working Particle Core applications and I get the “‘Particle’ was not declared in this scope” error with the line number pointing at a “Particle.publish” function.

This is unchanged and previously worked.

Reverting back to “Spark.publish” removes the errors, has something changed in the Web IDE or the firmware compiler?

2 Likes
2

Have you checked which firmware version you are targeting?

3

The “latest” 0.4.7

4

This is very odd, but try to select “0.4.7” (not “Latest (0.4.7)”)

1 Like
5

You got it! Selecting 0.4.7 compiles the code no problem. Selecting “Latest 0.4.7” generate the “Particle was not declared in this scope” error.

Quirky to say the least.

6

I’m filing an issue right now

3 Likes
7

@ScruffR Thanks for this spot. Last night the Web IDE compile was throwing all sorts of weird errors until I set to 0.4.7 as you suggested.

8

I can confirm this! Suddenly starts popping up these compile errors.

9

Can anyone explain how/where to switch target versions?

10

The target icon in the bottom left corner of Web IDE is the place
https://docs.particle.io/guide/getting-started/build/photon/#wait-what-is-firmware-

1 Like
11

Is there any way to switch target versions on particle dev? I’ve got a bout 25 files in my project and not keen on porting them all to web ide?

12

@Moookeee, unfortunately not.
If you are targeting a Core you could try building over and over till you hit a build server that still or already works again.
And for Photons the issue should have disappeared already.

13

Bumping this thread because I’m having the same problem, still.

particle_variable_test.cpp:9:3: error: ‘Particle’ was not declared in this scope
String aString;
^

Flashing a Photon. Tried building with 0.4.7 and latest 0.4.7. Bonks every time. Used to work. Anybody got anything to try? Thanks all.

14

Ok…now it’s working. So that’s good.

Thanks for listening!!