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WeNiPol CAN

Work in progress

Notes

Startup

On startup the ESP sends a baked-in Westwoodlabs logo to the WeNiPol.

WiFi

This project uses WiFi-Manager to connect to a WiFi network. If the ESP cannot connect to a network, it will create its own network with the SSID WeNiPol setup.

When connected to an existing WiFi network, the ESP will announce itself via mDNS as WeNiPol (wenipol.local). You probably should only use the mDNS lookup to determine the IP address (e.g. via ping) and then use the IP for curl requests, as this mDNS is pretty slow.

Uploading GIFs

  • GIFs MUST be 48x48 pixels.
  • The red-channel controls the red-LEDs, the green-channel controls the yellow-LEDs.
    The LED will be on if the value is 0xF0 or greater.
  • If all channels (R,G and B) are 0xF0 or greater, the LED won't be lit,
    as "white" is interpreted as a background color.
  • GIFs MAY be animated and contain any number of frames. The animation timing will be applied,
    but the animation will be looped indefinitely always.
  • To upload a GIF use the following endpoint: 
    $> curl -F gif=@$filename http://$IP/gif
    If you want the GIF to be displayed imediately, add ?show to the URL.
  • To show an existing GIF use: 
    $> curl -X POST 'http://$IP/gif/$FILENAME/:show'
  • To list all GIFs use: 
    $> curl 'http://$IP/gif'
  • To delete a GIF use: 
    $> curl -X DELETE 'http://$IP/gif/$FILENAME'
  • To set the brightness use the following endpoint: 
    $> curl -X POST 'http://$IP/brightness?brightness=$VALUE'
    The brightness value MUST be between 0 and 2400. The LEDs will only be visibly lit
    from values about 130 and up.
  • You can also reboot the ESP, if anything goes wrong: 
    $> curl -X POST 'http://$IP/reboot'