Bluetooth functionality

README.org

@@ -16,3 +16,10 @@ Also see https://git.kompot.si/g1smo/pifcamp-2021
    The original animation, modularized with sliders, was first "exhibited" on [[https://radiostudent.si/kultura/humanistika/delo-in-tehnologija][october 6th 2017]] in [[http://atrog.org/prostori/modri-kot][Modri kot]], a beautiful space for performance that used to be on the side of the [[https://tovarna.org/][autonomous factory Rog]] in Ljubljana, which was evicted by force on january 19th 2021 by the municipality to pave way for future gentrification.
    Special thanks to Zala and Lio for hosting me during early development and Tisa Neža for curating the first performance.
 
+* bluetooth
+  1. Pair the device (named "wavey wind")
+  2. Find the MAC address
+  3. Add a serial port (change MAC accordingly)
+    `sudo rfcomm bind 0 98:CD:AC:63:78:9A`
+  4. Run the server with the bluetooth address
+    `node server.js /dev/rfcomm0`

anim.js

@@ -8,7 +8,7 @@ console.log("Hello, Sky!");
 var odmik_kamere = 80;
 
 // Rotacija kamere
-var cam_rot_offset = 1;
+var cam_rot_offset = 0;
 
 // Vidni kot
 var FOV = 90;
@@ -30,9 +30,9 @@ var gostota_obj = 1;
 
 
 // Parametri animacije
-var drotacijaX = 0.006;
-var drotacijaY = 0.001;
-var drotacijaZ = 0.003;
+var drotacijaX = 0.000;
+var drotacijaY = 0.000;
+var drotacijaZ = 0.000;
 
 var rotacijaX = 0;
 var rotacijaY = 0;

server.js

@@ -2,10 +2,13 @@ const express = require('express')
 const http = require('http')
 const WebSocket = require('ws')
 const osc = require('osc')
+const readline = require('readline')
+const fs = require('fs')
 
 const port = 6676
 // Vzemi iz argumenta
 const tty = process.argv[2]
+const baudrate = parseInt(process.argv[3])
 
 const include_files = [
   '/anim.js',
@@ -24,12 +27,35 @@ const server = http.Server(app);
 // Odprti serijski OSC link
 let scon = null
 
-function openSerial() {
+function getArgs(parts) {
+  console.log('split to parts', parts)
+  switch (parts[1]) {
+  case 'quaternion':
+    return parts.splice(2).map((num) => ({
+      type: 'f',
+      value: parseFloat(num)
+    }))
+  }
+
+  // Default
+  return []
+}
+
+function getMsg(line) {
+  return null
+}
+
+function openSerial(bitrate) {
   console.log('opening ', tty)
+  if (!bitrate) {
+    bitrate = 115200
+  }
+
   scon = new osc.SerialPort({
     devicePath: tty,
-    bitrate: 115200,
-    autoOpen: true
+    bitrate: bitrate,
+    autoOpen: true,
+    useSLIP: true
   })
   scon.open()
   scon.on('open', e => {
@@ -52,7 +78,8 @@ function openSerial() {
   })
   
   // Arduino OSC gre v web
-  scon.on('osc', msg => {
+  scon.on('message', msg => {
+    console.log('osc msg', msg)
     // Debug incoming osc
     if (msg.address.indexOf('quaternion') > -1) {
       console.log('tty osc', msg.address, ...msg.args.map(val => Math.round(val * 1000) / 1000))
@@ -66,7 +93,32 @@ function openSerial() {
   }
 }
 
-openSerial()
+function openBT() {
+  console.log('opening bluetooth', tty)
+  const rl = readline.createInterface({
+    input: fs.createReadStream(tty)
+  })
+
+  rl.on('line', (line) => {
+    // Convert line to byte array
+    var enc = new TextEncoder(); // always utf-8
+    const arr = enc.encode(line);
+
+    try {
+      const msg = osc.readMessage(arr)
+      console.log(msg)
+      sendAll(msg, null, null, osclients)
+    } catch (e) {
+      console.warn("msg error", e)
+    }
+  })
+}
+
+if (baudrate) {
+  openSerial(baudrate)
+} else {
+  openBT()
+}
 
 app.get('/', (req, res) => {
     res.sendFile(__dirname + '/index.html');
@@ -141,3 +193,4 @@ wss.on('connection', function (ws) {
   })
   osclients.push(oscWS)
 })
+