diff --git a/broadlink/__init__.py b/broadlink/__init__.py
index 070f06d..1d4ffb2 100644
--- a/broadlink/__init__.py
+++ b/broadlink/__init__.py
@@ -12,7 +12,7 @@ from .device import Device, ping, scan
 from .hub import s3
 from .light import lb1, lb2
 from .remote import rm, rm4, rm4mini, rm4pro, rmmini, rmminib, rmpro
-from .sensor import a1
+from .sensor import a1, a2
 from .switch import bg1, ehc31, mp1, mp1s, sp1, sp2, sp2s, sp3, sp3s, sp4, sp4b
 
 SUPPORTED_TYPES = {
@@ -142,7 +142,10 @@ SUPPORTED_TYPES = {
         0x653C: ("RM4 pro", "Broadlink"),
     },
     a1: {
-        0x2714: ("e-Sensor", "Broadlink"),
+        0x2714: ("A1", "Broadlink"),
+    },
+    a2: {
+        0x4F60: ("A2", "Broadlink"),
     },
     mp1: {
         0x4EB5: ("MP1-1K4S", "Broadlink"),
diff --git a/broadlink/cover.py b/broadlink/cover.py
index 23727a8..1d8b41e 100644
--- a/broadlink/cover.py
+++ b/broadlink/cover.py
@@ -63,31 +63,32 @@ class dooya2(Device):
 
     TYPE = "DT360E-2"
 
-    def _send(self, operation: int, data: bytes):
+    def _send(self, operation: int, data: bytes = b""):
         """Send a command to the device."""
-        packet = bytearray(14)
+        packet = bytearray(12)
         packet[0x02] = 0xA5
         packet[0x03] = 0xA5
         packet[0x04] = 0x5A
         packet[0x05] = 0x5A
         packet[0x08] = operation
         packet[0x09] = 0x0B
-        
-        data_len = len(data)
-        packet[0x0A] = data_len & 0xFF
-        packet[0x0B] = data_len >> 8
 
-        packet += bytes(data)
+        if data:
+            data_len = len(data)
+            packet[0x0A] = data_len & 0xFF
+            packet[0x0B] = data_len >> 8
+            packet += bytes(2)
+            packet.extend(data)
 
         checksum = sum(packet, 0xBEAF) & 0xFFFF
-        packet[6] = checksum & 0xFF
-        packet[7] = checksum >> 8
+        packet[0x06] = checksum & 0xFF
+        packet[0x07] = checksum >> 8
 
         packet_len = len(packet) - 2
-        packet[0] = packet_len & 0xFF
-        packet[1] = packet_len >> 8
+        packet[0x00] = packet_len & 0xFF
+        packet[0x01] = packet_len >> 8
 
-        resp = self.send_packet(0x6a, packet)
+        resp = self.send_packet(0x6A, packet)
         e.check_error(resp[0x22:0x24])
         payload = self.decrypt(resp[0x38:])
         return payload
@@ -119,31 +120,32 @@ class wser(Device):
 
     TYPE = "WSER"
 
-    def _send(self, operation: int, data: bytes):
+    def _send(self, operation: int, data: bytes = b""):
         """Send a command to the device."""
-        packet = bytearray(14)
+        packet = bytearray(12)
         packet[0x02] = 0xA5
         packet[0x03] = 0xA5
         packet[0x04] = 0x5A
         packet[0x05] = 0x5A
         packet[0x08] = operation
         packet[0x09] = 0x0B
-        
-        data_len = len(data)
-        packet[0x0A] = data_len & 0xFF
-        packet[0x0B] = data_len >> 8
 
-        packet += bytes(data)
+        if data:
+            data_len = len(data)
+            packet[0x0A] = data_len & 0xFF
+            packet[0x0B] = data_len >> 8
+            packet += bytes(2)
+            packet.extend(data)
 
         checksum = sum(packet, 0xBEAF) & 0xFFFF
-        packet[6] = checksum & 0xFF
-        packet[7] = checksum >> 8
+        packet[0x06] = checksum & 0xFF
+        packet[0x07] = checksum >> 8
 
         packet_len = len(packet) - 2
-        packet[0] = packet_len & 0xFF
-        packet[1] = packet_len >> 8
+        packet[0x00] = packet_len & 0xFF
+        packet[0x01] = packet_len >> 8
 
-        resp = self.send_packet(0x6a, packet)
+        resp = self.send_packet(0x6A, packet)
         e.check_error(resp[0x22:0x24])
         payload = self.decrypt(resp[0x38:])
         return payload
@@ -156,24 +158,24 @@ class wser(Device):
 
     def open(self) -> int:
         """Open the curtain."""
-        resp = self._send(2, [0x4a, 0x31, 0xa0])
+        resp = self._send(2, [0x4A, 0x31, 0xA0])
         position = resp[0x0E]
         return position
 
     def close(self) -> int:
         """Close the curtain."""
-        resp = self._send(2, [0x61, 0x32, 0xa0])
+        resp = self._send(2, [0x61, 0x32, 0xA0])
         position = resp[0x0E]
         return position
 
     def stop(self) -> int:
         """Stop the curtain."""
-        resp = self._send(2, [0x4c, 0x73, 0xa0])
+        resp = self._send(2, [0x4C, 0x73, 0xA0])
         position = resp[0x0E]
         return position
 
     def set_position(self, position: int) -> int:
         """Set the position of the curtain."""
-        resp = self._send(2, [position, 0x70, 0xa0])
+        resp = self._send(2, [position, 0x70, 0xA0])
         position = resp[0x0E]
         return position
diff --git a/broadlink/sensor.py b/broadlink/sensor.py
index 33e7587..21bae0b 100644
--- a/broadlink/sensor.py
+++ b/broadlink/sensor.py
@@ -1,6 +1,4 @@
 """Support for sensors."""
-import struct
-
 from . import exceptions as e
 from .device import Device
 
@@ -29,19 +27,62 @@ class a1(Device):
     def check_sensors_raw(self) -> dict:
         """Return the state of the sensors in raw format."""
         packet = bytearray([0x1])
-        response = self.send_packet(0x6A, packet)
-        e.check_error(response[0x22:0x24])
-        payload = self.decrypt(response[0x38:])
-        data = payload[0x4:]
-
-        temperature = struct.unpack("<bb", data[:0x2])
-        temperature = temperature[0x0] + temperature[0x1] / 10.0
-        humidity = data[0x2] + data[0x3] / 10.0
+        resp = self.send_packet(0x6A, packet)
+        e.check_error(resp[0x22:0x24])
+        data = self.decrypt(resp[0x38:])
 
         return {
-            "temperature": temperature,
-            "humidity": humidity,
-            "light": data[0x4],
-            "air_quality": data[0x6],
-            "noise": data[0x8],
+            "temperature": data[0x04] + data[0x05] / 10.0,
+            "humidity": data[0x06] + data[0x07] / 10.0,
+            "light": data[0x08],
+            "air_quality": data[0x0A],
+            "noise": data[0x0C],
+        }
+
+
+class a2(Device):
+    """Controls a Broadlink A2."""
+
+    TYPE = "A2"
+
+    def _send(self, operation: int, data: bytes = b""):
+        """Send a command to the device."""
+        packet = bytearray(12)
+        packet[0x02] = 0xA5
+        packet[0x03] = 0xA5
+        packet[0x04] = 0x5A
+        packet[0x05] = 0x5A
+        packet[0x08] = operation
+        packet[0x09] = 0x0B
+
+        if data:
+            data_len = len(data)
+            packet[0x0A] = data_len & 0xFF
+            packet[0x0B] = data_len >> 8
+            packet += bytes(2)
+            packet.extend(data)
+
+        checksum = sum(packet, 0xBEAF) & 0xFFFF
+        packet[0x06] = checksum & 0xFF
+        packet[0x07] = checksum >> 8
+
+        packet_len = len(packet) - 2
+        packet[0x00] = packet_len & 0xFF
+        packet[0x01] = packet_len >> 8
+
+        resp = self.send_packet(0x6A, packet)
+        e.check_error(resp[0x22:0x24])
+        payload = self.decrypt(resp[0x38:])
+        return payload
+
+    def check_sensors_raw(self) -> dict:
+        """Return the state of the sensors in raw format."""
+        data = self._send(1)
+
+        return {
+            "temperature": data[0x13] * 256 + data[0x14],
+            "humidity": data[0x15] * 256 + data[0x16],
+            "pm10": data[0x0D] * 256 + data[0x0E],
+            "pm2_5": data[0x0F] * 256 + data[0x10],
+            "pm1": data[0x11] * 256 + data[0x12],
         }