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robots/little_john/telemetry/code/connecting_serial_over_bluetooth.txt
robots/little_john/telemetry/code/monitor/colours.pyc
robots/little_john/telemetry/code/monitor/graph_plotter.py
robots/little_john/telemetry/Accelerometer/H3LIS331DL_Datasheet.pdf -> robots/little_john/telemetry/code/robot/Accelerometer/H3LIS331DL_Datasheet.pdf
robots/little_john/telemetry/code/robot/analogread_demo/analogread_demo.ino
robots/little_john/telemetry/code/robot/serial_forwarder/serial_forwarder.ino
@@ -0,0 +1,19 @@
+# How to connect to the telemetry system over Bluetooth
+These notes are based on experiences with Debian 9 (Stretch). A very similar approach should work for many other Linux distributions, but not other operating systems!
+  * First, ensure you have all the standard Bluetooth tools installed. Most systems will have installed these by default.
+  * Pair the Bluetooth module with your computer, with reference to the following details, (Common GUI tools are sufficient for this)
+    * MAC Address:  00:14:03:06:44:7C
+    * Name: Little_John
+    * Passcode: 3141
+  * In a terminal, run "rfcomm connect rfcomm0 00:14:03:06:44:7C" to connect the device to a virtual serial port. (Check you have sufficient permissions for this)
+  * There is now a serial port at /dev/rfcomm0, configured for 115200 / 8N1. This can be used like any other serial port.
+
+# Configuring the Bluetooth module
+This should only need doing infrequently, and is well documented on the web. The key points are:
+  * Use an Arduino running the serial-forwarding code in this repo to bridge between the hardware and software serial ports.
+  * While powering the module up, pull the "EN" pin High to enter configuration mode
+  * While in this mode, the module runs at 38400 Baud
+  * Commands must end with both \r and \n
+  * Sending "AT" should produce the response "OK"
+If in doubt, try visiting http://www.techbitar.com/modify-the-hc-05-bluetooth-module-defaults-using-at-commands.html
+
-#!/usr/bin/env python
+#!/usr/bin/env python2
  
 import pyglet
 import math
@@ -6,14 +6,18 @@ import random
 import time
 import serial
  
-datafeed = serial.Serial(
- port='/dev/ttyUSB0',
- baudrate = 9600,
- parity=serial.PARITY_NONE,
- stopbits=serial.STOPBITS_ONE,
- bytesize=serial.EIGHTBITS,
- timeout=1
-)
+try:
+    datafeed = serial.Serial(
+     port='/dev/rfcomm0',
+     baudrate = 115200,
+     parity=serial.PARITY_NONE,
+     stopbits=serial.STOPBITS_ONE,
+     bytesize=serial.EIGHTBITS,
+     timeout=1
+    )
+except:
+    print("Serial port setup failure; exiting")
+    exit()
  
 red = [1, 0, 0]
 green = [0, 1, 0]
@@ -33,12 +37,12 @@ def drawgrid(target, xlines, ylines, xlimits, ylimits):
     for xpos in range(0, target.width, target.width/xlines):
         pyglet.graphics.draw(2, pyglet.gl.GL_LINES, ('v2i', (xpos, 0, xpos, target.height)))
         tagtext = str(round((xlimits[1]-xlimits[0])*(float(xpos)/target.width) + xlimits[0], 1))
-        tag = pyglet.text.Label(tagtext, font_name='Arkhip', font_size=10, x=xpos-2, y=0, anchor_x='right', anchor_y='bottom')
+        tag = pyglet.text.Label(tagtext, font_name='Sans', font_size=10, x=xpos-2, y=0, anchor_x='right', anchor_y='bottom')
         tag.draw()
     for ypos in range(0, target.width, target.height/ylines):
         pyglet.graphics.draw(2, pyglet.gl.GL_LINES, ('v2i', (0, ypos, target.width, ypos)))
         tagtext = str(round((ylimits[1]-ylimits[0])*(float(ypos)/target.height) + ylimits[0], 1))
-        tag = pyglet.text.Label(tagtext, font_name='Arkhip', font_size=10, x=0, y=ypos-2, anchor_x='left', anchor_y='top')
+        tag = pyglet.text.Label(tagtext, font_name='Sans', font_size=10, x=0, y=ypos-2, anchor_x='left', anchor_y='top')
         tag.draw()
  
  
@@ -86,7 +90,7 @@ def poll_serial(foo):
     except:
         pass
  
-pyglet.clock.schedule_interval(poll_serial, 0.01)
+pyglet.clock.schedule_interval(poll_serial, 0.001)
  
 def drawgraph(target, xpoints, ypoints, colour):
     plotline(target, xpoints, ypoints, colour)
@@ -102,4 +106,4 @@ def on_draw():
     window1.clear()
     drawgraph(window1, xdata, y1data, green)
  
-pyglet.app.run()
 \ No newline at end of file
+pyglet.app.run()
@@ -7,9 +7,14 @@
  */
  
 #include <math.h>
+#include <SoftwareSerial.h>
+
+SoftwareSerial Bluetooth(3, 2); // Rx, Tx
  
 void setup() {
   Serial.begin(9600);
+  Bluetooth.begin(115200);
+  //Bluetooth.print("Hello, wireless world!");
   pinMode(13, OUTPUT);
 }
  
@@ -17,8 +22,8 @@ void loop() {
   float a0value = analogRead(A0);
   float a7value = analogRead(A7);
  
-  Serial.print(a0value);
-  Serial.print(", ");
-  Serial.println(a7value);
-  delay(20);
+  Bluetooth.print(a0value);
+  Bluetooth.print(", ");
+  Bluetooth.println(a7value);
+  delay(500);
 }
@@ -0,0 +1,33 @@
+/*
+
+AUTHOR: Hazim Bitar (techbitar)
+DATE: Aug 29, 2013
+LICENSE: Public domain (use at your own risk)
+CONTACT: techbitar at gmail dot com (techbitar.com)
+
+*/
+
+#include <SoftwareSerial.h>
+
+SoftwareSerial BTSerial(3, 2); // RX | TX
+
+void setup()
+{
+  pinMode(9, OUTPUT);  // this pin will pull the HC-05 pin 34 (key pin) HIGH to switch module to AT mode
+  digitalWrite(9, HIGH);
+  Serial.begin(9600);
+  Serial.println("Enter AT commands:");
+  BTSerial.begin(38400);  // HC-05 default speed in AT command more
+}
+
+void loop()
+{
+
+  // Keep reading from HC-05 and send to Arduino Serial Monitor
+  if (BTSerial.available())
+    Serial.write(BTSerial.read());
+
+  // Keep reading from Arduino Serial Monitor and send to HC-05
+  if (Serial.available())
+    BTSerial.write(Serial.read());
+}