Measure nightsky with TSL237

I am learning along here, i am trying out different float, unsigned longs etc... i have also got my "cheat-code" to work... i tried the freqmeasure.h and that worked like a charm...

don´t get me wrong here, i like to learn and i am listening to all of you! big thumbs up for you guys! So while i try to compile my "own" code i also trying librarys with examplecode...

just sharing what i tried yesterday, i also tried to add a button so i can choose when i want to take a reading.

#include <LiquidCrystal.h>
#include <FreqMeasure.h>
#include <Math.h>

LiquidCrystal lcd (12, 11, 10, 9, 7, 6);
float Msqm;
const float A = 22;
int buttonSQM = A2;

void setup() {
   Serial.begin(19200);
   FreqMeasure.begin();
   pinMode(buttonSQM, INPUT);
   digitalWrite(buttonSQM, HIGH);
   lcd.begin(16,2);
}

double sum=0;
int count=0;

void loop() {
   if (buttonSQM = digitalRead(HIGH));{
     if (FreqMeasure.available()) {
      // average several reading together
     sum = sum + FreqMeasure.read();
     count = count + 1;
     if (count > 30) {
     double frequency = F_CPU / (sum / count);
     Serial.println(frequency);
     sum = 0;
     count = 0;

     Msqm = A - 2.5*log10(frequency); //Egen Kod
     Serial.print(Msqm);
     Serial.println(" Mag/Arcsecond2 ");
}
}
}
}