WiFi OLED Mini Weather Station with ESP8266

I’m convinced that this ‘Internet of Things’ thing-thing is not real. Pure marketing and buz words without any added value, right? The IoT hype is so bizar: it must be originated by aliens which have taken over the brains of all the Pointy-haired Bosses of the world? There is no useful application or use case out there!

But wait! There *is* actually good use case, at least for the geeks of this world. We all love clocks as we want to know the time, and we all love the weather forecast so we can plan accordingly. At least I usually do :-).

SQUIX ESP8266 Mini Weather Station

SQUIX ESP8266 Mini Weather Station

A tweet by Daniel Eichhorn (@squix78) triggered my interest: he created a cool ESP8266 WiFi weather station, and actually sells it as a kit. So without waiting I ordered two kits,without really checking all the details: The “ESP8266 WeatherStation Kit” and the “ESP8266 WiFi Color Display Kit“.

Squix ESP8266 Weather Station Kits

Squix ESP8266 Weather Station Kits

Each kit is in a very solid (and useful!) plastic box. And unlike many other kits from China, everything is well-organized and in antistatic bags. The ESP8266 WeatherStation Kit includes

ESP8266 OLED Kit

ESP8266 OLED Kit

  1. DHT11 Temperature/Humidity Sensor
  2. SSD1306 0.96″ OLED
  3. 40 Jumper cables
  4. EP8266 nodeMCU v1.0 with 4 MByte Flash
  5. Micro USB cable

No soldering is required for the ESP8266 WeatherStation Kit. Daniel wrote an excellent tutorial (https://blog.squix.org/wp-content/uploads/2017/06/esp8266weatherstationgettingstartedguide-20170608.pdf) plus a guide how to integrate the DHT11 sensor (https://blog.squix.org/2015/12/esp8266-weather-station-measuring-2.html). With this the wiring and software setup was a piece of cake :-).

The example code uses the free Weather Underground (https://www.wunderground.com) weather service. Using the ESP8266 chip it connects over WiFi to the service and receives the data in JSON format. A JSON parser on the ESP8266 extracts the data and displays the data. The weather service provides data for many countries and cities, in different languages. I selected a place a few kilometers away from home.

The interval of fetching data is configurable, and I’m using 10 minutes for now. The JSON data has lots of data, and the JSON parser on the ESP8266 extracts information for the display. In the example code it cycles through several pages.

Weather forecast with min/max temperature:

Forecast Data

Forecast Data

Current weather:

Current Weather

Current Weather

Indoor (and outdoor) temperature and humidity. For indoor sensor values it uses the DHT11. The temperature and humidity gets pushed to Thingspeak so I can use it from another weather station (more about this later).

Indoor Temperature

Indoor Temperature

Date and Time (yes, it is a clock too!):

Date and Time

Date and Time

For the weather station I designed in Inkscape an enclosure with 3 mm plywood (35x40x60 mm):

Weather Station Box Design in Inkscape

Weather Station Box Design in Inkscape

I used a 50W laser cutter with the K40 Whisperer software.I needed two iterations (first enclosure was a bit too small).

The DHT11 sensor gets placed on the bottom of the box:

DHT11 Placement

DHT11 Placement

I placed the ESP8266 module on top, behind the display. A small plywood pice separates the display from the module so they do not make contact:

ESP8266 Module

ESP8266 Module

On the bottom I added some ventilation holes to get better temperature and humidity values:

Bottom Side

Bottom Side

On the backside the USB port with a ‘cloud’ for better air flow.

Weather Station Back Side

Weather Station Back Side

Currently the weather station gets powered through the micro USB connector. Because of the jumper wiring there is no space for a battery. I have ordered a small LiPo plus a charger module for a next iteration. But so far I’m very happy how it fits together and works :-).

Summary

Thanks to Daniel I have now a small and useful weather station. It fetches local weather and forecast data from the internet using the ESP8266 WiFi chip. It pushes data to Thingspeak so I can use it from anywhere in the world. Or display the data another weather station. Remember that I ordered two kits? Yes, that second kit has a touch LCD, so this one will be next :-).

The design files are on Thingiverse: https://www.thingiverse.com/thing:2527340

Happy Squixing 🙂

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7 thoughts on “WiFi OLED Mini Weather Station with ESP8266

  1. I fear that IoT is real but probably not in our interest.
    A) What we currently see as Iot is the technology of the end-devices.
    B) This is useless without its counter part – 5G will enable the connection of massive devices (large areas with high density of devices).
    I can imagine that there is interest in production industries but guess that the risk of hacking completely open systems will be larger than its gain.
    So finally only those industries who tend to fetch as much of information from everybody and everywhere and usually abusing this information will drive this game.

    Like

    • Security is a big concern, and with all the ‘data collection’ of Google, Amazon, Apple and all the others things easily might get our of control too. And a new class of virus and denial-of-service waves will reach us in the future too :-(.

      Like

  2. Pingback: WiFi TFT Touch LCD Weather Station with ESP8266 | MCU on Eclipse

  3. Pingback: SQUIX ESP8266 based E-Paper WiFi Weather Station | MCU on Eclipse

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