In part 1, I was building a light sensor, but now it’s morphed into a multi-sensor

Running against my recent terrible Aliexpress streak, the remaining bits actually arrived. Here’s the items I’ve used to build a great little multi-sensor that pumps data into Home Assistant:

Total: US$8.38
Item Details Price
Main Board Wemos Mini D1 (probably a clone). ESP8266 chip with integrated Wifi US$3.30
Luminosity Sensor TLS2561 I²C module US$1.11
Temp/Pressure/Humidity Sensor Bosch BME280 I²C module US$3.97

It’s a little surprising that the triple sensor is the most expensive part of the whole thing, but Bosch make nice electronics, and the BME280 is the current pick of the crop for these sorts of sensors. Probably total overkill for my use case. If you don’t care about air pressure and you wanted to save a dollar* you could get away with a DHT22.

*I bet you complain about $1.99 iPhone games too.

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