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D1 mini Environment Brightness Sensor

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Model information

Source: Printables
Category: Electronics
License: Creative Commons — Attribution — Noncommercial — Share Alike

Details Makes & comments Remixes Collections

This is a case I remixed for a plugged-in environment brightness sensor using Wemos D1 mini and dome type BH1750FVI brightness sensor module.

There are two pitfalls about this sensor module:

It contains an on-board regulator so VCC can be 3.3V-5V. However it appears to also contain an on-board level shifter, thus the power supply cannot exceed 3.3V when using with ESP8266, otherwise you risk damaging the I2C pins.
The ADDR pin floating can cause undefined behaviour. Tie it to either GND (0x23) or VCC (0x5C).

Connect as follows: VCC-3.3V, SCL-D1, SDA-D2, GND-GND. Also I bridged the ADDR pin to GND on the module itself.

Here is the ESPHome profile I am using:

esphome:
  name: esp8266-lightsensor
    friendly_name: esp8266-lightsensoresp8266:
  board: d1_mini
logger:
api:
  encryption:
    key: "ChangeMe"
ota:
  password: "ChangeMe"
wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
i2c:
  sda: D2
  scl: D1
  scan: false
  frequency: 400khz
sensor:

platform: bh1750
address: 0x23
name: “Room Illuminance”
device_class: illuminance
unit_of_measurement: lx
accuracy_decimals: 0
update_interval: 1s
filters:
or:
delta: 3.0
throttle: 5s