Hello, the library dont really want to work with my esp32s, anyone?

[marius240]

my code:

#include <Wire.h>

BH1750 lightMeter(0x5C);

void setup() {
  // put your setup code here, to run once:
  Wire.begin();
  Serial.begin(115200);
  lightMeter.begin(BH1750::CONTINUOUS_HIGH_RES_MODE);
  delay(2000);

}

void loop() {
  // put your main code here, to run repeatedly:

  uint16_t lux = lightMeter.readLightLevel();
  Serial.print("Light level: ");
  Serial.println(lux);

  delay(5000);


}

The cabling:

D21 -> SDA
D22 -> SCL
GND & ADDR -> gnd
VCC -> 3.3V

[marius240]

btw my it gives me error: [BH1750] ERROR: received NACK on transmit of address
in the start and then for the rest of the time just:
Device is not configured!
Light level: 65534

[marius240]

the board is NodeMCU ESP32S

[marius240]

i2cdetect just gives me

[marius240]

Need help ASAP!
@claws @wridgers @goebish @NuTTeR

thanks <3

[goebish]

try with
Wire.begin(21, 22);

[marius240]

@goebish nope aint working

[marius240]

still same error, just ERROR: received NACK on transmit of address

[goebish]

Have you tried to add pull up resistors between SDA<->3.3V and SCL<->3.3V ?
I'm not sure Wire.begin takes care of that.
If that doesn't work, then I don't know, have you tried with another i2c device such as a small oled display ?

[marius240]

nope dont have another ic2 device, and dont think i got a pull up resister,

[marius240]

but im pretty sure there is no need for a pull up resistor

[goebish]

just use any 1k-30k resistors, that should be fine, you need 2

[marius240]

so a resistor between D21 -> SDA and D22 -> SCL ?

[marius240]

why should a resistor change anything? just asking :D

[goebish]

no, between SDA -> 3.3V & SCL -> 3.3V