Comments on: Arduino with BH1750 Ambient Light Sensor

By: Fatima Atta

Fatima Atta — Sat, 24 May 2025 18:20:16 +0000

In reply to NJI RUTH MBIKANG. I am having this same issue! did you fix it?

By: Bob

Bob — Mon, 27 Nov 2023 00:27:43 +0000

The one thing that would be great to add would the ability to write this data to a csv file so you can import into a spreadsheet. Just seeing in the serial monitor isn’t that useful.

Thanks

By: MHDCHD

MHDCHD — Sat, 12 Aug 2023 10:57:16 +0000

In reply to NJI RUTH MBIKANG. hi, you probably have the SDA and SCL pins on digital 4 and 5. wire them on analog 4&5 and it should go well.

By: NJI RUTH MBIKANG

NJI RUTH MBIKANG — Mon, 26 Dec 2022 13:44:29 +0000

In reply to Sara Santos. my wiring is correct im sure of it

By: NJI RUTH MBIKANG

NJI RUTH MBIKANG — Mon, 26 Dec 2022 13:43:43 +0000

it says “no I2C devices found”

By: Sara Santos

Sara Santos — Sun, 27 Nov 2022 23:45:21 +0000

In reply to NJI RUTH MBIKANG.

You may also need to check the sensor I2C address: https://raw.githubusercontent.com/RuiSantosdotme/Random-Nerd-Tutorials/master/Projects/LCD_I2C/I2C_Scanner.ino

By: Sara Santos

Sara Santos — Sun, 27 Nov 2022 23:44:26 +0000

In reply to NJI RUTH MBIKANG. Check you're wiring. It is probably not wired properly.

By: NJI RUTH MBIKANG

NJI RUTH MBIKANG — Sun, 27 Nov 2022 18:11:13 +0000

hello when i upload the code and check on the serial monitor, i see [BH1750] Device is not configured!
Light: -2.00 lx
even after applying torchlight on i get the same results. please i need help

By: Sara Santos

Sara Santos — Fri, 08 Apr 2022 20:45:16 +0000

In reply to Aart V..

Hi.
The I2C address is set on the hardware.
ADD pin floating or connected to GND → address: 0x23
ADD pin connected to VCC → address: 0x5C
Regards,
Sara

By: Aart V.

Aart V. — Fri, 08 Apr 2022 15:06:21 +0000

In reply to Sara Santos.

Hi Sara,
Thanks for your fast reply! But I still have a problem. In my project I use a lot of pins (display, other sensors) and have no more pins available.

I checked the ESP32 tutorial and used the i2c scanner. I found the sensors can be connected at the same time (the ADD pin for sensor 1 floating and for sensor 2 connected to VCC). The sensors are detected on different addresses (x023 and x05C).

Is it possible to set up the BH1750 library so that lightMeter1 uses x023 and lightMeter2 uses x05C?

Thanks in advance again!