[Solved] ESP32 PWM Fan Controller Help needed.

Hello 

I am a complete newbie to this, so I need some help with the programming. The project is copied from dronebotworkshop.com/esp32-pwm-fan/ , and when I compile the file in Arduino IDE (newest version), I get the following error message:

C:\Users\birkl\OneDrive\Dokumenter\Arduino\Tempstyret_FAN\Tempstyret_FAN.ino:50:16: error: expected initializer before 'tachISR'
50 | void IRAM_ATTR tachISR() { tachPulseCount = tachPulseCount + 1;
| ^~~~~~~
C:\Users\birkl\OneDrive\Dokumenter\Arduino\Tempstyret_FAN\Tempstyret_FAN.ino:50:16: error: expected initializer before 'tachISR'
50 | void IRAM_ATTR tachISR() { tachPulseCount = tachPulseCount + 1;
| ^~~~~~~
C:\Users\birkl\OneDrive\Dokumenter\Arduino\Tempstyret_FAN\Tempstyret_FAN.ino: In function 'void setup()':
C:\Users\birkl\OneDrive\Dokumenter\Arduino\Tempstyret_FAN\Tempstyret_FAN.ino:60:13: error: no matching function for call to 'TwoWire::begin(int, int)'
60 | Wire.begin(4, 5); // SDA=4, SCL=5
| ~~~~~~~~~~^~~~~~
In file included from C:\Users\birkl\OneDrive\Dokumenter\Arduino\Tempstyret_FAN\Tempstyret_FAN.ino:12:
C:\Users\birkl\AppData\Local\Arduino15\packages\rp2040\hardware\rp2040\5.6.0\libraries\Wire\src/Wire.h:50:10: note: candidate: 'virtual void TwoWire::begin()'
50 | void begin() override;
| ^~~~~
C:\Users\birkl\AppData\Local\Arduino15\packages\rp2040\hardware\rp2040\5.6.0\libraries\Wire\src/Wire.h:50:10: note: candidate expects 0 arguments, 2 provided
C:\Users\birkl\AppData\Local\Arduino15\packages\rp2040\hardware\rp2040\5.6.0\libraries\Wire\src/Wire.h:52:10: note: candidate: 'virtual void TwoWire::begin(uint8_t)'
52 | void begin(uint8_t address) override;
| ^~~~~
C:\Users\birkl\AppData\Local\Arduino15\packages\rp2040\hardware\rp2040\5.6.0\libraries\Wire\src/Wire.h:52:10: note: candidate expects 1 argument, 2 provided
C:\Users\birkl\OneDrive\Dokumenter\Arduino\Tempstyret_FAN\Tempstyret_FAN.ino:77:3: error: 'ledcAttach' was not declared in this scope
77 | ledcAttach(PWM_PIN, PWM_FREQ, PWM_RESOLUTION);
| ^~~~~~~~~~
C:\Users\birkl\OneDrive\Dokumenter\Arduino\Tempstyret_FAN\Tempstyret_FAN.ino:85:52: error: 'tachISR' was not declared in this scope
85 | attachInterrupt(digitalPinToInterrupt(TACH_PIN), tachISR, FALLING);
| ^~~~~~~
C:\Users\birkl\OneDrive\Dokumenter\Arduino\Tempstyret_FAN\Tempstyret_FAN.ino:88:3: error: 'ledcWrite' was not declared in this scope
88 | ledcWrite(PWM_PIN, 0);
| ^~~~~~~~~
C:\Users\birkl\OneDrive\Dokumenter\Arduino\Tempstyret_FAN\Tempstyret_FAN.ino: In function 'void loop()':
C:\Users\birkl\OneDrive\Dokumenter\Arduino\Tempstyret_FAN\Tempstyret_FAN.ino:153:5: error: 'ledcWrite' was not declared in this scope
153 | ledcWrite(PWM_PIN, pwmValue);
| ^~~~~~~~~
C:\Users\birkl\OneDrive\Dokumenter\Arduino\Tempstyret_FAN\Tempstyret_FAN.ino:155:5: error: 'ledcWrite' was not declared in this scope
155 | ledcWrite(PWM_PIN, 0);
| ^~~~~~~~~
exit status 1

Compilation error: expected initializer before 'tachISR'

So what's missing, or what's wrong?

Kind Regards

Klaus K.