made with the ArcGIS Maps SDK for JavaScript, Node.js and ESP32.
Send the map legend to a RGB LED strip like here!
Run a small Node.js application on localhost that receives data from the map, transforms it into Artnet and sends it over to the ESP32.
Enter IP of your ESP in the package.json start script or better, create your own script!
"start": "node server.js -a <ESP_IP> -p 9000 -v"
Use this ESP32 firmware to receive data from artnet-http and put it on your LED strip via FastLED.
This is the webmap with logic for legend2LEDs.
artnet-http bridge
Bridges HTTP POST requests to ArtNet UDP
Options
-a, --artnet_host string IP address of the ArtNet server.
--artnet_port number ArtNet UDP port (6454 is standard.)
-p, --listen_port number HTTP port to listen on.
-v, --verbose Display transmitted packets on the console.
Examples
Start the HTTP server on the default port, sending ArtNet requests to
localhost
$ node server.js -h 127.0.0.1
Start the HTTP server on port 9000, sending ArtNet requests to a remote host,
with verbose output
$ node server.js -v -h 10.0.1.17 -p 9000
HTTP interface
The server will listen on / for POST requests. Posting a JSON body containing
an array of numbers between 0 and 255 will write those values to ArtNet
universe 0, starting with channel 1. For example:
$ curl -X POST 127.0.0.1:8000 -H "Content-Type: application/json" -d "[255,
255, 255]"
You can optionally provide a universe and starting channel number in the HTTP
route. For example, to set the first three channels of universe 2 to 255:
$ curl -X POST 127.0.0.1:8000/2 -H "Content-Type: application/json" -d "[255,
255, 255]"
To set channels 12, 13, and 14 of universe 4 to 0:
$ curl -X POST 127.0.0.1:8000/4/12 -H "Content-Type: application/json" -d
"[0, 0, 0]"