![Suddenly my program ('Serial2' was not declared in this scope) - #2 by wildbill - Project Guidance - Arduino Forum Suddenly my program ('Serial2' was not declared in this scope) - #2 by wildbill - Project Guidance - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/1/a/1/1a131244f723ae5a8485c261a95e5f3da91afde7.png)
Suddenly my program ('Serial2' was not declared in this scope) - #2 by wildbill - Project Guidance - Arduino Forum
![error compiling: 'D1' was not declared in this scope · Issue #18 · nidayand/motor-on-roller-blind-ws · GitHub error compiling: 'D1' was not declared in this scope · Issue #18 · nidayand/motor-on-roller-blind-ws · GitHub](https://user-images.githubusercontent.com/28128937/45780369-4d78dd80-bc12-11e8-837b-a61641f9c1ec.png)
error compiling: 'D1' was not declared in this scope · Issue #18 · nidayand/motor-on-roller-blind-ws · GitHub
![Was not declared in this scope- Mensaje Arduino- Solución 1- Revisar nombres: variable mal declarada - YouTube Was not declared in this scope- Mensaje Arduino- Solución 1- Revisar nombres: variable mal declarada - YouTube](https://i.ytimg.com/vi/JB9yo5cshI8/hq720.jpg?sqp=-oaymwEhCK4FEIIDSFryq4qpAxMIARUAAAAAGAElAADIQj0AgKJD&rs=AOn4CLD43Hx-i02vpk67PdkrxWIKtRmZRA)
Was not declared in this scope- Mensaje Arduino- Solución 1- Revisar nombres: variable mal declarada - YouTube
![Trying to upload to arduino uno and says lcd was not declared in this scope. Is there a fix atm? : r/arduino Trying to upload to arduino uno and says lcd was not declared in this scope. Is there a fix atm? : r/arduino](https://i.redd.it/kv39i3g906n21.jpg)