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--- newsletters:2025-01 [2025/02/03 03:34] – [Portable Folk gadget] osnr
+++ newsletters:2025-01 [2025/02/03 03:46] (current) – [Portable Folk gadget] osnr
@@ Line 108: / Line 108: @@
   * Still struggling to make it do ad-hoc or access point mode by default
     * (ideally it would work in concurrent mode, so could both get on known existing networks and make its own for wild environments:)
-      * {{:newsletters:pasted:20250131-200028.png?300px}}
+      * {{:newsletters:pasted:20250131-200028.png?400px}}
 === The stereo camera ===
@@ Line 126: / Line 126: @@
   * It has a working trigger button! That'll open up a lot of fun point-and-drag and lasso interactions. Here I'm having the 'marching ants' rectangle turn from white to green when I press the button down:
     * {{newsletters:img_7370.mp4}}
-  * It has a working battery, so you don't need to plug it in & carry a long extension cord! I haven't tested battery life but probably at least an hour? And I can even get reports over serial about battery percentage, like a real gadget:
+    * This is the program that implements that (I just put it in setup.folk, since we don't have physical programs here yet):
-    *
+      * <code>
+exec gpio mode 7 up
+When display /disp/ has width /w/ height /h/ {
+    When the clock time is /t/ {
+        set pressed [expr {![exec gpio read 7]}]
+        set color [expr {$pressed ? "green" : "white"}]
+        Wish to draw a dashed stroke with points [list [list 0 0] [list $w 0] [list $w $h] [list 0 $h] [list 0 0]] \
+          color $color width 10 dashlength 40 dashoffset [expr {fmod($t, 10)*-120}]
+    }
+}
+</code>
+      * it basically just sets a pullup resistor on GPIO 7 (where I plugged the button in) & shells out to [[https://github.com/orangepi-xunlong/wiringOP|wiringOP]] every frame to read that pin; to avoid the multi-ms overhead of shelling out, would be good to make a Tcl-C library to call into wiringOP and do this (I think the C header and library is already on the device anyway!)
+  * It has a working battery, so you don't need to plug it in & carry a long extension cord! I haven't tested battery life but probably at least an hour? And I can even get live reports over serial about battery percentage, just like a phone or laptop shows battery percentage:
+    * {{:newsletters:pasted:20250203-034338.png?600px}}
+    * (will be fun to get this info into Folk and display it ambiently in the corner or on the marching ants border or whatever)
   * It's really heavy and kind of big, notably heavier than the older gadget (because it has 3 18650 batteries and a heavier mini projector with a full chassis). Not sure what to do about this. Maybe go back to the concept of the detachable battery pack (a standard USB-C battery pack would be ideal, but I don't think I could quite get that to work without more custom power stuff).
   * It has a speaker! I haven't gotten this to work yet (I haven't gotten the Orange Pi 5 3.5mm audio jack to work at all. Linux audio struggles). Also curious how loud it'll be without an amplifier.