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A weather station
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README.md

ESP8266 WeatherStation

Compact outdoor weather station.

Features:

  • Temperature
  • Humidity
  • Pressure
  • dust particles PM10 (10µm) and PM2.5 (ultrafine, 2.5µm)
  • radioactivity
  • WiFi
  • needs 5V power supply
  • opensensemap.org API

Power consumption:

  • ~40mA @ 5V
  • (31mA idle + fan + wifi)

CAD files (OpenSCAD) and source code included.

Weatherstation

geiger counter and DHT22 particle sensor and ESP8266
Weatherstation Weatherstation

Installation Instructions

  1. git clone https://dev.xd0.de/hendrik/esp-weatherstation.git
  2. cd esp-weatherstation
  3. virtualenv -p python --no-site-packages .
  4. source bin/activate
  5. pip install -U platformio
  6. platformio run --target upload && platformio device monitor -b 115200

Wiring

        NodeMCU v0.9
                                           SDS011
         A0      D0
        RSV   (5)D1 ----------------------- TXD
        RSV   (4)D2 ----------------------- RXD
        RSV   (0)D3 -- BMP_SDA        .---- GND
        RSV   (2)D4 -- BMP_SCL        |     ...
        RSV     3V3 -- BMP_VCC        | .--- 5V
        RSV   .-GND -- BMP_GND        | |   ...
        GND  =C= D5                   | |   ...
        3V3   '- D6 ------------.     | |
        GND      D7 -- DHT_DATA  \    +-| --------- GND
        3V3      D8               \   | +----------  5V
         EN      RX                '- | ----------- VIN  
        RST      TX                   | |
        GND -.   GND - DHT_GND        | |        GeigerCnt
    .--  5V  |   3V3 - DHT_VDD        | |
    |        '------------------------' |
    '-----------------------------------'

SDS011:

  • TXD -> D1
  • RXD -> D2
  • GND -> GND
  • 5V -> 5V

DHT22:

  • VDD -> 3V3
  • DATA -> D7
  •  ->
  • GND -> GND

RadiationD-v1.1(CAJOE):

  • GND -> GND
  • 5V -> 5V
  • VIN -> D6

12V power mod with step down converter and voltage divider for voltage measurement:

BAT+ --[FUSE]--+------------- Vin+| BUCK CONVERTER |Vout+ -- 5V 
               \R\                |                |
                \1\
                  >---+------------------------------------- A0
                /R/   |
               /2/   === C1       |                |
BAT- ----------'------+------ Vin-| BUCK CONVERTER |Vout- -- GND

Example values: R1=1MΩ, R2=100kΩ, C1=some ceramic capacitor (optional) measures up to ~30V

ToDo

License

Code

WTFPL: http://www.wtfpl.net/about/

Sensor Data

Public Domain: https://opendatacommons.org/licenses/pddl/summary/