BH1750, Blynk, ESP8266 12E

Solved
10

Below is the simplest BH1750 Arduino sketch I can find but it depends precisely which model you have.

#include <Wire.h>
#include <BH1750.h>  // https://github.com/claws/BH1750
BH1750 lightMeter;
 
void setup(){
  Serial.begin(9600);
  lightMeter.begin();
}
 
void loop() {
  uint16_t lux = lightMeter.readLightLevel();
  Serial.print("Light: ");
  Serial.print(lux);
  Serial.println(" lx");
  delay(1000);
}

So for Blynk you need to keep the first 3 lines and lightMeter.begin in setup().

In sendUptime() you need:

uint16_t lux = lightMeter.readLightLevel();
Blynk.virtualWrite(4, lux);