Watch an individual device's use of the network with this Device Wheel. Once the WiFi is configured by joining the "Home Network Study" network and setting the credentials via the captive portal, bringing an IoT device in proximity of the Device Wheel will cause it to pair and the wheel will spin whenever the is network activity - clockwise for downloads, anti-clockwise for uploads.
- Adafruit HUZZAH32 – ESP32 Feather Board - https://www.adafruit.com/product/3405
- 3800 RPM 1.5mm Diameter Shaft 2V DC Motor for Walkman
- 1.5A Mini Speed Control Dual Channel Motor Driver MX1508
- SPDT Mini Power Switch - https://shop.pimoroni.com/products/spdt-mini-power-switch
- 3mm blue LED
- 1K Ohm resistor
- LiPo Battery Pack 3.7V 500mAh - https://shop.pimoroni.com/products/lipo-battery-pack?variant=20429082055
- Micro USB male to Micro USB female charge + data adapter cable
The circuit shows an Adafruit HUZZAH32, but the code will compile for any ESP8266 or ESP32 (pin assignments will need to change of course).
The Arduino core for the ESP8266 or ESP32 must be installed for the Arduino IDE:
- ESP8266 - https://github.com/esp8266/Arduino#installing-with-boards-manager
- ESP32 - https://github.com/espressif/arduino-esp32/blob/master/docs/arduino-ide/boards_manager.md
And the Sketch Data Folder Uploader Tool:
- ESP8266 - https://randomnerdtutorials.com/install-esp8266-filesystem-uploader-arduino-ide/
- ESP32 - https://randomnerdtutorials.com/install-esp32-filesystem-uploader-arduino-ide/
And following Arduino libraries are required:
- Approximate - https://github.com/davidchatting/Approximate/
- YoYoWiFiManager - https://github.com/interactionresearchstudio/YoYoWiFiManager
- ListLib - https://github.com/luisllamasbinaburo/Arduino-List
From the Tools menu then select either Generic ESP822 Module or ESP32 Dev Module and then for the ESP8266 select 4MB (FS:3MB OTA:~512KB) for Flash Size and for the ESP32 select a Partition Scheme of Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS) - assuming a Flash Size of 4MB. Then upload the associated data folder using the uploader tool - also found under the Tools menu. The data folder contains the HTML, JavaScript and image files for the captive portal that configures the WiFi. If you don't upload the data folder the portal will say, Yo Yo Machines default HTML.
The WiFi is configured by joining the Home Network Study network with the password blinkblink and entering the details of your network. If multiple meters are started once they will automaically discover each other and the set-up will shared between them. This is enabled by the YoYoWiFiManager.
The Three WiFi Meters were created by David Chatting (@davidchatting) as part of the A Network of One's Own project. This code is licensed under the MIT License.