WIP hot glue bump tutorial

README.md

@@ -36,3 +36,12 @@ sudo chmod 666 /dev/ttyUSB0
 [StereoNick](https://twitter.com/koujaku)  
 [Peter Sassaman](https://twitter.com/PeterSassaman)  
 [Lucas De Bonet (LucidVR)](https://twitter.com/VrLucid)  
+
+
+### WIP hot glue bump tutorial
+1. reset the device *press enter key and disconnect power
+2. align where the bump will be with gravity and generally aim the glue gun opposite gravity
+3. get coverage starting from the top *wrapping the glue around the screw head
+4. end with the glue you need for the bump before lifting up and off to round it out
+5. use the side of the nozzle to reshape as needed
+

firmware/braille_xr/braille_xr.ino

@@ -12,12 +12,13 @@ char in_char = ' ';
 struct ServoPin {
   Servo servo;
   int pin;
+  int spin; // -1 left, +1 right
 };
 
 ServoPin servos[6] = {
-  {Servo(), 14}, {Servo(), 5},
-  {Servo(), 12}, {Servo(), 4},
-  {Servo(), 13}, {Servo(), 2} // 19 and 21 are untested
+  {Servo(), 14, +1}, {Servo(), 5, -1},
+  {Servo(), 12, -1}, {Servo(), 4, +1},
+  {Servo(), 13, +1}, {Servo(), 2, -1} // 19 and 21 are untested
 };
 
 // braille alphabet
@@ -37,6 +38,11 @@ std::unordered_map<char, BrailleChar> braille_map = {
     0, 0,
     0, 0
   }}},
+  {'\n', {{
+    1, 1,
+    1, 1,
+    1, 1
+  }}},
   {'a', {{
     1, 0,
     0, 0,
@@ -243,8 +249,8 @@ void loop() {
     BrailleChar bc = braille_map[in_char];
     for (int i = 0; i < 6; i++) {
       int state = bc.servo_states[i];
-      int s = i % 2 == 0 ? state : (1 - state);
-      servos[i].servo.write(s * 180);
+      int spin  = servos[i].spin < 0 ? (1 - state) : state;
+      servos[i].servo.write(spin * 90);
     }
 
     old_char = in_char;

sk_demo/src/Mono.cs

@@ -26,6 +26,11 @@ public class Mono {
       0, 0,
       0, 0
     } },
+    { '\n', new int[] {
+      1, 1,
+      1, 1,
+      1, 1
+    } },
     { 'a', new int[] {
       1, 0,
       0, 0,
@@ -370,6 +375,7 @@ public class Mono {
 
   KebKey[] keb_keys = new KebKey[] {
     new() { key = Key.Space, char_ = ' ' },
+    new() { key = Key.Return, char_ = '\n' },
     new() { key = Key.A, char_ = 'a' },
     new() { key = Key.B, char_ = 'b' },
     new() { key = Key.C, char_ = 'c' },