BH1750 light sensor - Device not configured

Other Hardware Sensors
1

Hi folks,

can you help me out, getting started with a (hopefully) straight forward issue?
I have an Arduino Uno R3 and I've bought a BH1750 sensor and loaded a BH1750 library into the Arduino IDE (GitHub - claws/BH1750: An Arduino library for the digital light sensor breakout boards containing the BH1750FVI IC). I followed the example code to test.

#include <Wire.h>
#include <BH1750.h>

BH1750 lightMeter;

void setup(){
  Serial.begin(9600);
  Wire.begin();
  lightMeter.begin();
  Serial.println(F("BH1750 Test"));
}

void loop() {
  float lux = lightMeter.readLightLevel();
  Serial.print("Light: ");
  Serial.print(lux);
  Serial.println(" lx");
  delay(1000);
}

Compiling and uploading results in the serial monitor outputting

16:12:11.182 -> [BHROR: received NACK on transmit of address
16:12:11.182 -> BH1750 Test
16:12:11.182 -> [BH1750] Device is not configured!
16:12:11.182 -> Light: -2.00 lx

I suspected the soldering at first (not pretty), but I don't think that is the issue - tested it with a multimeter. The wiring seems also correct.

ASoldering
ASoldering1166×1166 232 KB

BWiring
BWiring1920×2560 642 KB

I am new to this, and not sure what the next step is to find out what's wrong. Do you have any ideas?

Cheers, Georg

2

Try running the i2c scanner sketch. You should find it somewhere in the IDE example sketch menus.

3

Just did that:

13:47:59.400 -> I2C Scanner
13:47:59.400 -> Scanning...
13:47:59.433 -> I2C device found at address 0x23 !
13:47:59.465 -> done

This seems the wanted result...

1 Like
4

I should add, that it's the GY302-module (no pull up resistors needed).

5

You need to call bool BH1750::configure(Mode mode)

Give this a try

void setup(){
  Serial.begin(9600);
  Wire.begin();
  lightMeter.begin();
  lightMeter.configure(BH1750::CONTINUOUS_HIGH_RES_MODE);  //  or one of the other modi.
  Serial.println(F("BH1750 Test"));
}

void loop() {
  float lux = lightMeter.readLightLevel();
  Serial.print("Light: ");
  Serial.print(lux);
  Serial.println(" lx");
  delay(1000);
}

Options for mode

BH1750::CONTINUOUS_HIGH_RES_MODE:
BH1750::CONTINUOUS_HIGH_RES_MODE_2:
BH1750::CONTINUOUS_LOW_RES_MODE:
BH1750::ONE_TIME_HIGH_RES_MODE:
BH1750::ONE_TIME_HIGH_RES_MODE_2:
BH1750::ONE_TIME_LOW_RES_MODE:

You might give my BH1750 library a try, has some options that might be interesting.

6

Try @robtillaart 's library and maybe one other like from Adafruit or Sparkfun.

If you have another Arduino or compatible, or a RPi of some kind, try those.

Then try re-soldering
Soldering_Results

If none of these ideas help, I think maybe you got a bad sensor.

7

Thanks to both of you!
While the initial hint (calling configure) had no effect, using @robtillaart 's library (example sketch) works.

I'm still a little confused as to why the other library didn't work, but very happy, to be up and running.

Thanks again!

1 Like
8

You can post your entire working sketch?

9

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