Add support for multiple devices and update documentation

Add support for discovering more than one device on the network, and update
the documentation to describe that.

2 files changed, 107 insertions, 68 deletions

diff --git a/README.md b/README.md
index ce9509068bfc..6a6f01847ca0 100644
--- a/README.md
+++ b/README.md
@@ -1,36 +1,45 @@
 Python control for Broadlink RM2 IR controllers
 ===============================================
 
-A simple Python API for controlling IR controllers from [Broadlink](http://www.ibroadlink.com/rm/). At present, only RM Pro (referred to as RM2 in the codebase) devices are supported and only one device per network will be used. There is currently no support for the cloud API.
+A simple Python API for controlling IR controllers from [Broadlink](http://www.ibroadlink.com/rm/). At present, only RM Pro (referred to as RM2 in the codebase) and A1 sensor platform devices are supported. There is currently no support for the cloud API.
 
 Example use
 -----------
 
-Discover an available device on the local network:
+Discover available devices on the local network:
 ```
 import broadlink
 
-device = broadlink.rm2()
-device.discover()
+devices = broadlink.discover(timeout=5)
 ```
 
 Obtain the authentication key required for further communication:
 ```
-device.auth()
+devices[0].auth()
 ```
 
 Enter learning mode:
 ```
-device.enter_learning()
+devices[0].enter_learning()
 ```
 
 Obtain an IR packet while in learning mode:
 ```
-ir_packet = device.check_data()
+ir_packet = devices[0].check_data()
 ```
 (This will return None if the device does not have a packet to return)
 
 Send an IR packet:
 ```
-device.send_data(ir_packet)
+devices[0].send_data(ir_packet)
+```
+
+Obtain temperature data from an RM2:
+```
+devices[0].check_temperature()
+```
+
+Obtain sensor data from an A1:
+```
+data = devices[0].check_sensors()
 ```
diff --git a/broadlink/__init__.py b/broadlink/__init__.py
index 63ad76b38677..edd5f24bfede 100755
--- a/broadlink/__init__.py
+++ b/broadlink/__init__.py
@@ -1,74 +1,95 @@
 #!/usr/bin/python
 
 from datetime import datetime
-from socket import *
 from Crypto.Cipher import AES
 import time
 import random
+import socket
 
-class rm2:
-  def __init__(self):
-    self.count = random.randrange(0xffff) 
-    self.key = bytearray([0x09, 0x76, 0x28, 0x34, 0x3f, 0xe9, 0x9e, 0x23, 0x76, 0x5c, 0x15, 0x13, 0xac, 0xcf, 0x8b, 0x02])
-    self.iv = bytearray([0x56, 0x2e, 0x17, 0x99, 0x6d, 0x09, 0x3d, 0x28, 0xdd, 0xb3, 0xba, 0x69, 0x5a, 0x2e, 0x6f, 0x58])
-    s = socket(AF_INET, SOCK_DGRAM)
-    s.connect(('8.8.8.8', 0))  # connecting to a UDP address doesn't send packets
-    local_ip_address = s.getsockname()[0]
+def discover(timeout=None):
+  s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+  s.connect(('8.8.8.8', 0))  # connecting to a UDP address doesn't send packets
+  local_ip_address = s.getsockname()[0]
+  address = local_ip_address.split('.')
+  cs = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+  cs.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+  cs.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
+  cs.bind(('',0))
+  port = cs.getsockname()[1]
+  starttime = time.time()
 
-    self.address = local_ip_address.split('.')
-    self.id = bytearray([0, 0, 0, 0])
+  devices = []
 
-  def discover(self):
-    self.cs = socket(AF_INET, SOCK_DGRAM)
-    self.cs.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
-    self.cs.setsockopt(SOL_SOCKET, SO_BROADCAST, 1)
-    self.cs.bind(('',0)) 
-    self.port = self.cs.getsockname()[1]
-
-    timezone = time.timezone/-3600
-    packet = bytearray(0x30)
-
-    year = datetime.now().year
-
-    if timezone < 0:
-      packet[0x08] = 0xff + timezone - 1
-      packet[0x09] = 0xff
-      packet[0x0a] = 0xff
-      packet[0x0b] = 0xff
-    else:
-      packet[0x08] = timezone
-      packet[0x09] = 0
-      packet[0x0a] = 0
-      packet[0x0b] = 0
-    packet[0x0c] = year & 0xff
-    packet[0x0d] = year >> 8
-    packet[0x0e] = datetime.now().minute
-    packet[0x0f] = datetime.now().hour
-    subyear = str(year)[2:]
-    packet[0x10] = int(subyear)
-    packet[0x11] = datetime.now().isoweekday()
-    packet[0x12] = datetime.now().day
-    packet[0x13] = datetime.now().month
-    packet[0x18] = int(self.address[0])
-    packet[0x19] = int(self.address[1])
-    packet[0x1a] = int(self.address[2])
-    packet[0x1b] = int(self.address[3])
-    packet[0x1c] = self.port & 0xff
-    packet[0x1d] = self.port >> 8
-    packet[0x26] = 6
-    checksum = 0xbeaf
+  timezone = time.timezone/-3600
+  packet = bytearray(0x30)
 
-    for i in range(len(packet)):
-        checksum += packet[i]
-    checksum = checksum & 0xffff
-    packet[0x20] = checksum & 0xff
-    packet[0x21] = checksum >> 8
+  year = datetime.now().year
 
-    self.cs.sendto(packet, ('255.255.255.255', 80))
-    response = self.cs.recvfrom(1024)
+  if timezone < 0:
+    packet[0x08] = 0xff + timezone - 1
+    packet[0x09] = 0xff
+    packet[0x0a] = 0xff
+    packet[0x0b] = 0xff
+  else:
+    packet[0x08] = timezone
+    packet[0x09] = 0
+    packet[0x0a] = 0
+    packet[0x0b] = 0
+  packet[0x0c] = year & 0xff
+  packet[0x0d] = year >> 8
+  packet[0x0e] = datetime.now().minute
+  packet[0x0f] = datetime.now().hour
+  subyear = str(year)[2:]
+  packet[0x10] = int(subyear)
+  packet[0x11] = datetime.now().isoweekday()
+  packet[0x12] = datetime.now().day
+  packet[0x13] = datetime.now().month
+  packet[0x18] = int(address[0])
+  packet[0x19] = int(address[1])
+  packet[0x1a] = int(address[2])
+  packet[0x1b] = int(address[3])
+  packet[0x1c] = port & 0xff
+  packet[0x1d] = port >> 8
+  packet[0x26] = 6
+  checksum = 0xbeaf
+
+  for i in range(len(packet)):
+      checksum += packet[i]
+  checksum = checksum & 0xffff
+  packet[0x20] = checksum & 0xff
+  packet[0x21] = checksum >> 8
+
+  cs.sendto(packet, ('255.255.255.255', 80))
+  if timeout is None:
+    response = cs.recvfrom(1024)
     responsepacket = bytearray(response[0])
-    self.host = response[1]
-    self.mac = responsepacket[0x3a:0x40]
+    host = response[1]
+    mac = responsepacket[0x3a:0x40]
+    return device(host=host, mac=mac)
+  else:
+    while (time.time() - starttime) < timeout:
+      cs.settimeout(timeout - (time.time() - starttime))
+      try:
+        response = cs.recvfrom(1024)
+      except socket.timeout:
+        return devices
+      responsepacket = bytearray(response[0])
+      host = response[1]
+      mac = responsepacket[0x3a:0x40]
+      devices.append(device(host=host, mac=mac))
+
+class device:
+  def __init__(self, host, mac):
+    self.host = host
+    self.mac = mac
+    self.count = random.randrange(0xffff)
+    self.key = bytearray([0x09, 0x76, 0x28, 0x34, 0x3f, 0xe9, 0x9e, 0x23, 0x76, 0x5c, 0x15, 0x13, 0xac, 0xcf, 0x8b, 0x02])
+    self.iv = bytearray([0x56, 0x2e, 0x17, 0x99, 0x6d, 0x09, 0x3d, 0x28, 0xdd, 0xb3, 0xba, 0x69, 0x5a, 0x2e, 0x6f, 0x58])
+    self.id = bytearray([0, 0, 0, 0])
+    self.cs = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    self.cs.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+    self.cs.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
+    self.cs.bind(('',0))
 
   def auth(self):
     payload = bytearray(0x50)
@@ -102,7 +123,7 @@ class rm2:
     enc_payload = response[0x38:]
 
     aes = AES.new(str(self.key), AES.MODE_CBC, str(self.iv))
-    payload = aes.decrypt(str(response[0x38:]))
+    payload = aes.decrypt(str(enc_payload))
 
     self.id = payload[0x00:0x04]
     self.key = payload[0x04:0x14]
@@ -232,3 +253,12 @@ class rm2:
       aes = AES.new(str(self.key), AES.MODE_CBC, str(self.iv))
       payload = aes.decrypt(str(response[0x38:]))
       return payload[0x04:]
+
+class rm2(device):
+  def __init__ (self):
+    device.__init__(self, None, None)
+
+  def discover(self):
+    dev = discover()
+    self.host = dev.host
+    self.mac = dev.mac