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--- web_of_things:fosdem_2026 [2026/01/30 10:58] – Christian Paul
+++ web_of_things:fosdem_2026 [2026/01/30 19:27] (current) – Christian Paul
@@ Line 1: / Line 1: @@
 ====== Web of Things at FOSDEM 2026 ======
-Web of Things is a set of standards for Internet of Things use cases. At the Matrix Hackathon and FOSDEM 2026, I intend to let people experiment with the following hardware. I support Web of Things via HTTP and Websockets.
+===== Quick start =====
-===== Receipt printer =====
+  * [[https://wot-wrench.chrpaul.de/#try=https://wot-why.jaller.de/receipt-printers-for-events/photo|Print photos on the receipt printer]] (select a photo then click "Invoke")
+  * [[https://wot-wrench.chrpaul.de/#try=https://wot.chrpaul.de/image-storage/LDN3dJE3vu|Display images on the e-paper screen]]
-Current status: Getting it online…
+===== Advanced: HTTP API =====
+Web of Things is a set of standards for Internet of Things use cases. At the Matrix Hackathon and FOSDEM 2026, I brought the following hardware. They support support Web of Things via HTTP and Websockets.
+==== Receipt printer ====
+Current status: Ready
 {{:web_of_things:43384356-377a-4866-ad5c-95b7f105e780.jpg?300|}}
@@ Line 17: / Line 24: @@
   * Supported image formats: PNG (best results), JPG
-==== URLs ====
+=== URLs ===
-Use these URLs to prepare for the event or test your scripts. They will not print anything.
-  * Test URL for images: https://wot-wrench.chrpaul.de/#try=https://wot-why.jaller.de/receipt-printers-for-events/photo
+  * URL for printing images: https://wot-wrench.chrpaul.de/#try=https://wot-why.jaller.de/receipt-printers-for-events/photo
-    * Thing Description: https://wot-why.jaller.de/receipt-printers-for-events/photo
+    * URL for scripts: https://wot-why.jaller.de/receipt-printers-for-events/photo/actions/print-photo
-  * Test URL for text: https://wot-wrench.chrpaul.de/#try=https://wot-why.jaller.de/receipt-printers-for-events/text
+  * UI for printing text: https://wot-wrench.chrpaul.de/#try=https://wot-why.jaller.de/receipt-printers-for-events/text
-    * Thing Description: https://wot-why.jaller.de/receipt-printers-for-events/text
+    * URL for scripts: https://wot-why.jaller.de/receipt-printers-for-events/text/actions/print-text
-The final URLs will be published at the Matrix Hackathon.
+==== Code examples (images) ====
-==== Code examples ====
 Bash:
@@ Line 55: / Line 59: @@
 if (!response.ok) {
-  throw Error(`Failed to upload image. HTTP ${response.status}`);
+  throw Error(`Failed to queue print job. HTTP ${response.status}`);
 }
 </code>
-===== E-paper screen =====
+==== Code examples (text) ====
+Bash:
+<code bash>
+curl -X POST \
+  --header "Content-Type: application/json" \
+  --data '{"text":"Hello World!"}' \
+  https://wot-why.jaller.de/receipt-printers-for-events/text/actions/print-text
+</code>
+Or in NodeJS / Bun / Deno:
+<code javascript>
+const response = await fetch("https://wot-why.jaller.de/receipt-printers-for-events/text/actions/print-text", {
+  method: "POST",
+  headers: {
+    "Content-Type": "application/json",
+  },
+  body: JSON.stringify({
+    text: "Hello World!",
+  }),
+});
+if (!response.ok) {
+  throw Error(`Failed to queue print job. HTTP ${response.status}`);
+}
+</code>
+==== E-paper screen ====
 Current status: Ready at https://wot-wrench.chrpaul.de/#try=https://wot.chrpaul.de/image-storage/LDN3dJE3vu
@@ Line 77: / Line 110: @@
   * Supported image formats: PNG (best results), JPG
-==== URLs ====
+=== URLs ===
-Use these URLs to prepare for the event or test your scripts. They will not display anything on the screen, but the Thing has a preview property.
+Use these URLs to test your scripts. They will not display anything on the screen, but the Thing has a preview property.
   * Test URL: https://wot-wrench.chrpaul.de/#try=https://wot.chrpaul.de/image-storage/fosdem
-    * Image property: https://wot.chrpaul.de/image-storage/fosdem
+    * Image property for scripts: https://wot.chrpaul.de/image-storage/fosdem/properties/image
+Use this URL to HTTP PUT an image onto the screen.
   * Production URL for scripts: https://wot-wrench.chrpaul.de/#try=https://wot.chrpaul.de/image-storage/LDN3dJE3vu