Introduction: Arduino Uno Wireless Weather Station (

Picture of Arduino Uno Wireless Weather Station   (

In this Instructable I am going to show you how to build a Wireless Weather Station using Arduino

A Weather station is a device that collects data related to the weather and environment using many different sensors. We can measure many things like:

  • Temperature
  • Humidity
  • Wind
  • Barometric Pressure
  • UV index
  • Rain

Mine inspiration to create this weather station is Greg from Davis anemometer, wind speed and rain meter Arduino code copyright rights belong to him.

I'm using Arduino Uno as main board.

ESP8266 WiFi module will send data to

Weather Underground is a commercial weather service providing real-time weather information via the Internet.

I will use these sensors:

  • Temperature - Dallas DS18B20
  • Humidity, Pressure - BME280
  • UV, Solar - ML8511
  • Anenometer and wind speed - Davis 6410
  • Rain gauge - Ventus W174

Step 1: Parts

Picture of Parts

The parts needed in order to build this project are the following:

  1. Arduino Uno
  2. ESP8266
  3. BME280
  4. ML8511
  5. Davis 6410
  6. Ventus W174

Step 2: Schematic and Wiring Diagram

Picture of Schematic and Wiring Diagram

Step 3: PCB Arduino Uno Weather Station Shield

Picture of PCB Arduino Uno Weather Station Shield

Design printed circuit board (PCB), I was used ,,Sprint-Layout" software.

To create this Arduino Uno weather station shield you will need:

  1. ML8511 UVB UV Rays Sensor Breakout UV Light Sensor Analog Output for Arduino Ebay
  2. Waterproof Digital Thermal Probe or Sensor DS18B20 Arduino Sensor Ebay
  3. JST-XH Kit 4Pin 2.54mm Terminal Housing PCB Header Wire Connectors Ebay
  4. Atmospheric Pressure Sensor Temperature Humidity Sensor Breakout BME280Ebay
  5. 1x ESP8266 ESP12F Ebay
  6. 1x 1k 0805 resistor
  7. 1x 120R 0805 resistor
  8. 8x 0R 1206 jumper ( resistor)
  9. copper board
  10. 2x 4.7K resistor
  11. 1x 10k resistor
  12. 1x 3mm led
  13. 1x RJ45 socket Ebay
  14. 1x 47uF electrolytic capacitor
  15. 1x 40pins header pins Ebay
  16. 1x Voltage Regulator Sot-223 Ams1117 Ams117-3.3 3.3V 1A Ebay
  17. 1x 2.54mm Pitch Switch DIP 2 Ebay

Step 4: Arduino Sensors Libraries, Manual and Other Information

1) Arduino weather station project

2) Davis 6410 anemometer manual

3) Adafruit BME280 Driver (Barometric Pressure Sensor) library

4) ML8511 UV Sensor Library

5) Arduino Library for Maxim Temperature Integrated Circuits DS18B20 DS18S20 - Please note there appears to be an issue with this series. DS1822 DS1820 MAX31820

6) Library for Dallas/Maxim 1-Wire Chips

7) Wunderground (Personal Weather Station Upload Protocol)

8) NodeMCU weather station

Step 5: Soldering PCB

Picture of Soldering PCB

Weather station shield I was ad in to Raspberry Pi case. I think it looks better.

Step 6: Installing Personal Weather Station

Picture of Installing  Personal Weather Station

The location weather station is the most important part of
installation. If weather station is located under a tree or an overhang, the rainfall data measured by the station will not be correct. If you place your weather station in an alley, you could very well get a wind tunnel effect on the anemometer, resulting in erroneous wind data. Weather station should have good "fetch", or distance from any other tall object.

The standard wind measurement should be taken at 10 meters above the ground. A roof-top works the best for me.

Weather station is powered from solar panel. So it is autonomous.

The most common error in installing a weather station is associated with misplacing the thermometer sensor. Meteorologists define temperature as the temperature in shade with plenty of ventilation. When placing weather station, make sure:

  • The thermometer sensor never receives direct sunlight.
  • The thermometer receives plenty of ventilation and is not blocked from the wind.
  • If the thermometer is placed on a roof-top, make sure it is at least 1.5 meters above the roof-top.
  • If the thermometer is placed above grass, again, it should be at least 1.5 meters above the grass surface.
  • The thermometer is at least 15 meters from the nearest paved surface.

So I'm using weather shelter. I made it from PVC tube. This way, weather station can be placed in direct sunlight, with the thermometer located inside the shelter.

More information about installing weather station here

Step 7: ESP8266 AT Commands

Picture of ESP8266 AT Commands

First it need prepare ESP8266 wifi modulle. Change CWMODE into 1 = Station mode(Client) and connect ESP8266 to you WiFi router.
I'm using usb to ttl serial adapter. Its need only connect 4 wire ( +3.3V, GND TX,RX)

AT commands:




AT+CWJAP="your ssd","password"

more AT commands here

Step 8: Arduino Code

  1. Before upload code into your Arduino Uno register in to obtain a WU station ID and key/password
  2. Change this ID and key/password into your weather station Arduino code.
  • char ID [] = "xxxxxxxx"; //wunderground weather station ID
  • String PASSWORD = "xxxxxxxx"; // wunderground weather station password
  • #define DEBUG 0 // If you want debug change it from 0 to 1

I'm using 30 second loop time sending data to

25 seconds I will take to measure wind speed. Other time is for read sensor data

Step 9: Result

Picture of Result

It is working and sending sensors data to I'm very happy ;)


Profiler64 (author)2017-08-02

I have some problems to connect the W174. Its a wireless Rainmeter but in the tutorial you connect it with cables. Can you help me to connect the Rainmeter?

Thanks for answers!

RimvydasP (author)Profiler642017-08-03

I was used W174 rainmeter. But you can use another. You just only neeed to conect +5V, GND and 10k pull up resistor.

About ,,wireless" I mean that WiFi modulle ESP8266 send weather station data to internet without cable.

Profiler64 (author)RimvydasP2017-08-03

Ok I think I made it. I have the W174 and it is for a wireless connection. But i made two cables to the reed lever and connectet it like you. Sorry for my bad english.

RimvydasP (author)Profiler642017-08-03

Maybe this help you

orinos (author)2017-07-25

I have all the sensors of a wireless Oregon Scientific station on my roof, but the weather station itself is "dead" and expensive to replace. Would it be possible to build your weather station with other sensors than the ones you listed? (in my cas, OS sensors). Thanks for your answer!

RimvydasP (author)orinos2017-07-25

Everything it is possible. but you will need figured out how connect it properly to Arduino.

IgorF2 (author)2017-07-22

Great! I started a weather station project with Arduino + ESP8266 + Thingspeak some time ago. I'll try to use Weather Underground and use your project as inspiration.

RimvydasP (author)IgorF22017-07-23

thank you IgorF2. ask me if you have a question.

diy_bloke (author)2017-07-22

Looks really great. Although I am quite sure that the ESP8266 alone would have been enough for the program, the lack of ADC ports (you need minimally 2) makes even the Wemos D1 unsuitable.
Anyway, Love your shield

RimvydasP (author)diy_bloke2017-07-23

Thank you diy_bloke

About This Instructable




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