esp-weatherstation/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:

• ~50mA @ 5V
• (31mA idle + fan + wifi)

CAD files (OpenSCAD) and source code included.

geiger counter and DHT22	particle sensor and ESP8266

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]--+--------------.
               \R\            |
                \1\           '
                  >---+--------------------------------- A0
                /R/   |       .    ________________
               /2/   === C1   +---| buck converter |---- 5V
BAT- ----------'------+-----------|________________|---- GND

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

ToDo

• https://tinker.yeoman.com.au/2016/05/29/running-nodemcu-on-a-battery-esp8266-low-power-consumption-revisited/
• deep_sleep (connect D0 to RST)
• https://hackaday.com/2014/10/25/use-a-cheap-pin-diode-as-a-geiger-counter/ (opengeiger.de/elektronik.html)
• Solar power

License

Code

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

Sensor Data

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