2021-01-14 17:29:24 +00:00
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# Modular Weather Station
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2021-01-15 11:36:19 +00:00
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An ESP8266 based weather station, designed to be modular.
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## Hardware requirements
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This station is based on ESP8266 boards, like the NodeMCU. I personally develop using a LoLin
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mini, but also tested the station with an Arduino UNO and a NodeMCU v3 board.
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### Temperature and humidity
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To measure temperature and humidity, you will need a DHT11 or DHT22 sensor. DHT11, usually blue
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in color, is for indoor usage since it’s not reliable under freezing temperature, while DHT22,
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usually white in color, can be used outside.
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### Atmospheric pressure
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To measure pressure, you will need a BMP085 or BMP180 module, connected to the main board via I²C.
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The sensor on it is also capable of measuring temperature, so if you don’t have a DHT11/DHT22 at
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hand, you can still get temperature data (the firmware prefers DHT11/DHT22 if present).
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### Ambient light
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To measure ambient light level, you will need a BH1750 module, connected to the board via I²C.
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### Rain
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To check if it’s raining or not, you will need a FC-37 or YL-83 module. Since the only analogue
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pin of the board is reserved for checking the battery level, you have to use the digital pin of
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the module.
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## Power source
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If you can put the whole box near an outlet plug, you are good to go! Just attach an old USB phone
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charger to the board, and your station is powered.
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If that’s not an option for you, you can attach a battery to the VIN and GND pins. Consult your
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board’s manual for the voltage range.
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2021-01-14 17:29:24 +00:00
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## Compiling
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Copy the file `config.h.sample` to `config.h` and edit the parameters within.
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2021-01-15 11:36:19 +00:00
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You can either compile the whole sketch from within the Arduino IDE or, if you are familiar with
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the command line, you can use the official [Arduino CLI
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tools](https://arduino.github.io/arduino-cli/):
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2021-01-14 17:29:24 +00:00
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```
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arduino-cli compile -b --fqbn esp8266:esp8266:nodemcuv2 /path/to/the/sketch /path/to/the/sketch/build
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```
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