Add app to use badge as bluetooth speaker

bluetooth_speaker/main.py

@@ -0,0 +1,141 @@
+"""App to use the badge as a (handset profile only) bluetooth speaker"""
+
+___name___         = "Bluetooth Speaker"
+___license___      = "MIT"
+___dependencies___ = ["ugfx_helper", "sim800", "dialogs", "buttons", "app"]
+___categories___ = ["Sound"]
+
+
+import ugfx_helper, ugfx
+import app
+import sim800
+from dialogs import *
+import buttons
+
+BLUETOOTH_NAME = "BadgeSpeaker"
+
+g_paired = False
+
+
+def pairing_dialog(scan_timeout_s=10):
+    ''' Show BLE devices to pair with and connect. Returns True if paired, False if failed '''
+    waiting_message = WaitingMessage("Scanning for bluetooth devices for %s seconds"%scan_timeout_s, "Scanning")
+
+
+    devices = sim800.btscan(int(scan_timeout_s * 1000))
+
+    waiting_message.destroy()
+
+    # List format is [id, name, addr, rssi]. FIXME: Only returns 1 item?
+    try:
+        devices_prompts = [{'title': v[1], 'id': v[0]} for v in devices]
+    except TypeError: #Only one device found. #TODO: Not very neat
+        devices_prompts = [{'title':devices[1] ,'id':devices[0]},]
+
+    #TODO: Fix non printable chars in device names
+
+    option = prompt_option(devices_prompts, title="Devices Found", select_text="Select", none_text="Rescan")
+
+    if option:
+        sim800.btpair(option['id'])
+        passcode = sim800.btparingpasscode()
+        correct_passcode = prompt_boolean(passcode, title="Started connection from other device?", font=FONT_MEDIUM_BOLD)
+
+        if correct_passcode:
+            sim800.btpairconfirm() #TODO: 4 number passcodes?
+            return True
+
+        else:
+            sim800.btpairreject()
+            return False
+    else:
+        return False
+
+
+def pairing_callback(param):
+    ''' Callback for incoming pairing request '''
+    global g_paired
+    accept = prompt_boolean("Accept pairing request from %s"%param, title="Incoming pairing")
+    if accept:
+        sim800.btpairconfirm(0000)
+        # Check if we did pair
+        if len(sim800.btpaired()) > 1:
+            g_paired = True
+    else:
+        sim800.btpairreject()
+
+
+def set_simple_pairing():
+    ''' Set pairing mode to 4 digit pin, default 0000 '''
+    sim800.command("AT+BTPAIRCFG=1,0000", 1000, "OK") # TODO: Error checking?
+
+
+#Initialise
+ugfx_helper.init()
+ugfx.init()
+ugfx.clear()
+
+ugfx.text(5,5, "Powering Up SIM800", ugfx.BLACK)
+sim800.poweron()
+ugfx.clear()
+
+ugfx.text(5,5, "Enabling Bluetooth", ugfx.BLACK)
+sim800.btpoweron()
+sim800.btname(BLUETOOTH_NAME)
+sim800.poweroff()
+sim800.poweron()
+sim800.btpoweron() # Needs a full cycle to have an effect
+sim800.btvisible(True)
+
+# Set pairing mode
+set_simple_pairing()
+
+ugfx.text(5,20, "Addr: %s " % sim800.btaddress(), ugfx.BLACK)
+ugfx.text(5,35, "Name: %s " % sim800.btname(), ugfx.BLACK)
+ugfx.clear()
+
+# Register pairings callback
+sim800.registercallback("+BTPAIRING:", pairing_callback)
+
+clear_pairing = prompt_boolean("Delete all bluetooth pairings?",title="Clear Pairings?", true_text="Yes", false_text="No")
+
+if clear_pairing:
+    sim800.btunpair(0) #0 = clear every pairing
+
+# Start main loop
+ugfx.clear()
+ugfx.Label(5,5, 220, 200, "Connect to %s \n Passcode = 0000  \n Press menu to exit" % BLUETOOTH_NAME)
+
+connected = True
+
+while(True):
+
+    # Check for pairing button
+    if (buttons.is_triggered(buttons.Buttons.BTN_1)):
+        pairing_dialog()
+
+    # Check for exit button
+    if (buttons.is_triggered(buttons.Buttons.BTN_Menu)):
+        sim800.btpoweroff()
+        app.restart_to_default()
+
+    num_connections = len(sim800.btconnected())
+
+    if (connected == False) and (num_connections > 0): # Gained connection
+        ugfx.area(0,220,240,320, ugfx.BLACK) #Blank bottom of screen
+        print(sim800.btconnected())
+        sim800.speakervolume(100)
+        sim800.btvoicevolume(100)
+        ugfx.set_default_font(ugfx.FONT_TITLE)
+        ugfx.text(5,230,"CONNECTED!", ugfx.GREEN)
+        ugfx.set_default_font(ugfx.FONT_SMALL)
+        connected = True
+
+    elif (connected == True) and (num_connections == 0): # Lost connection
+        ugfx.area(0,220,240,320, ugfx.BLACK) #Blank bottom of screen
+        ugfx.set_default_font(ugfx.FONT_TITLE)
+        ugfx.text(5,230,"DISCONNECTED", ugfx.RED)
+        ugfx.set_default_font(ugfx.FONT_SMALL)
+        connected = False
+
+    sleep.wfi()