Merge pull request #93 from tswsl1989/master

BTScan - Bluetooth device scan app

btscan/main.py

@@ -0,0 +1,76 @@
+"""Scan for and display nearby bluetooth devices"""
+
+___name___         = "Bluetooth Scan"
+___license___      = "MIT"	
+___dependencies___ = ["sleep", "app", "sim800"]
+___categories___   = ["Other", "System"]
+
+import ugfx, app
+from machine import Neopix
+np = Neopix()
+
+import sim800
+from tilda import Buttons
+from time import sleep
+
+btrestore = False
+duration = 10
+status_height = 20
+
+ugfx.init()
+ugfx.clear()
+ugfx.set_default_font(ugfx.FONT_FIXED)
+
+def instructions(duration):
+    ugfx.Label(5, 180, 240, 30, "Press A to start, B to change scan length or MENU to exit")
+    ugfx.Label(5, 210, 240, 15, "Scan requires ~{0} seconds".format(duration))
+
+if not sim800.btison():
+    sim800.btpoweron()
+    btrestore = True
+
+instructions(duration)
+# while (not Buttons.is_pressed(Buttons.BTN_A)) and (not Buttons.is_pressed(Buttons.BTN_B)) and (not Buttons.is_pressed(Buttons.BTN_Menu)):
+while not Buttons.is_pressed(Buttons.BTN_Menu):
+    a = Buttons.is_pressed(Buttons.BTN_A)
+    b = Buttons.is_pressed(Buttons.BTN_B)
+    if not a and not  b:
+        ugfx.poll()
+        continue
+
+    if b:
+        duration = duration + 5
+        if duration > 60:
+            duration = 5
+        ugfx.clear()
+        instructions(duration)
+        continue
+
+    ugfx.clear()
+
+    np.display([0,0])
+    np.display([0x000099, 0x000099])
+    devs = sim800.btscan(duration*1000)
+    np.display([0x00, 0x00])
+    
+    if len(devs) == 0:
+        ugfx.Label(0, 0, 240, 25, "No devices found")
+        np.display([0x110000,0x110000])
+        sleep(1)
+        np.display([0,0])
+    else:
+        if type(devs[0]) == int: 
+            devs = [devs]
+
+        y = 0
+        for dev in devs[:20]:
+            ugfx.Label(0, y, 240, 25, "{3}dB {1}".format(*dev))
+            y += status_height
+    instructions(duration)
+            
+## App quitting... 
+if btrestore:
+    sim800.btpoweroff()
+
+ugfx.clear()
+app.restart_to_default()

lib/sim800.py

@@ -558,7 +558,7 @@ def btscan(timeout=30000):
     response = command("AT+BTSCAN=1," + str(int(timeout/1000)), timeout+8000, "+BTSCAN: 1")
     for entry in extractvals("+BTSCAN: 0,", response):
         splitentry = entry.split(",")
-        result = [int(splitentry[0]), splitentry[1].strip("\""), splitentry[2], int(splitentry[3])]
+        result.append([int(splitentry[0]), splitentry[1].strip("\""), splitentry[2], int(splitentry[3])])
     return result
 
 # Get the requesting paring device name