diff --git a/ct002/__init__.py b/ct002/__init__.py
new file mode 100644
index 0000000..f6f2199
--- /dev/null
+++ b/ct002/__init__.py
@@ -0,0 +1 @@
+from .ct002 import CTEmulator 
\ No newline at end of file
diff --git a/ct002/ct002.py b/ct002/ct002.py
new file mode 100644
index 0000000..16c4d26
--- /dev/null
+++ b/ct002/ct002.py
@@ -0,0 +1,271 @@
+import socket
+import threading
+import time
+import re
+
+SOH = 0x01
+STX = 0x02
+ETX = 0x03
+SEPARATOR = '|'
+UDP_PORT = 12345
+
+# Field labels for response (from reference)
+RESPONSE_LABELS = [
+    "meter_dev_type", "meter_mac_code", "hhm_dev_type", "hhm_mac_code",
+    "A_phase_power", "B_phase_power", "C_phase_power", "total_power",
+    "A_chrg_nb", "B_chrg_nb", "C_chrg_nb", "ABC_chrg_nb", "wifi_rssi", "info_idx",
+    "x_chrg_power", "A_chrg_power", "B_chrg_power", "C_chrg_power", "ABC_chrg_power",
+    "x_dchrg_power", "A_dchrg_power", "B_dchrg_power", "C_dchrg_power", "ABC_dchrg_power"
+]
+
+class CTEmulator:
+    def __init__(self, device_type="HMG-50", battery_mac="001122334455", ct_mac="009c17abcdef", ct_type="HME-4", poll_interval=1, discovery_battery_macs=None, dedupe_time_window=10):
+        self.device_type = device_type
+        self.battery_mac = battery_mac
+        self.ct_mac = ct_mac
+        self.ct_type = ct_type
+        self.poll_interval = poll_interval
+        self._udp_thread = None
+        self._stop = False
+        self._value = [0, 0, 0]
+        self._value_mutex = threading.Lock()
+        if discovery_battery_macs is None:
+            self.discovery_battery_macs = ["001122334455"]
+        else:
+            self.discovery_battery_macs = discovery_battery_macs
+        self.dedupe_time_window = dedupe_time_window
+        self._last_response_time = {}
+        self.before_send = None
+
+    @property
+    def value(self):
+        return self._value
+
+    @value.setter
+    def value(self, value):
+        with self._value_mutex:
+            self._value = value
+
+    def validate_mac(self, mac):
+        return re.fullmatch(r"[0-9a-fA-F]{12}", mac) is not None
+
+    def calculate_checksum(self, data_bytes):
+        xor = 0
+        for b in data_bytes:
+            xor ^= b
+        return xor
+
+    def parse_ct002_request(self, data):
+        # Validate SOH, STX, ETX, length, checksum
+        if len(data) < 10:
+            return None, "Too short"
+        if data[0] != SOH or data[1] != STX:
+            return None, "Missing SOH/STX"
+        sep_index = data.find(b'|', 2)
+        if sep_index == -1:
+            return None, "No separator after length"
+        try:
+            length = int(data[2:sep_index].decode('ascii'))
+        except ValueError:
+            return None, "Invalid length field"
+        if len(data) != length:
+            return None, f"Length mismatch (expected {length}, got {len(data)})"
+        if data[-3] != ETX:
+            return None, "Missing ETX"
+        # Checksum
+        xor = 0
+        for b in data[:length-2]:
+            xor ^= b
+        expected_checksum = f"{xor:02x}".encode('ascii')
+        actual_checksum = data[-2:]
+        # Accept both '03' and ' 3' as valid for 0x03
+        if actual_checksum.lower() != expected_checksum:
+            if actual_checksum[0:1] == b' ' and actual_checksum[1:2] == expected_checksum[1:2]:
+                pass  # Accept space-padded single digit
+            else:
+                return None, f"Checksum mismatch (expected {expected_checksum}, got {actual_checksum})"
+        # Parse fields
+        try:
+            message = data[4:-3].decode('ascii')
+        except UnicodeDecodeError:
+            return None, "Invalid ASCII encoding"
+        fields = message.split('|')[1:]  # first char is '|'
+        return fields, None
+
+    def build_ct002_response(self, request_fields):
+        values = self.value if self.value else [0, 0, 0]
+        # meter_dev_type and meter_mac_code from request, hhm_dev_type and hhm_mac_code from emulator config
+        response_fields = [
+            request_fields[0],  # meter_dev_type (from request)
+            request_fields[1],  # meter_mac_code (from request)
+            self.ct_type,       # hhm_dev_type (from emulator)
+            self.ct_mac,        # hhm_mac_code (from emulator)
+            str(values[0]),     # A_phase_power
+            str(values[1]),     # B_phase_power
+            str(values[2]),     # C_phase_power
+            str(sum(values)),   # total_power
+        ] + ["0"] * (len(RESPONSE_LABELS) - 8)
+        message_str = SEPARATOR + SEPARATOR.join(response_fields)
+        message_bytes = message_str.encode('ascii')
+        base_size = 1 + 1 + len(message_bytes) + 1 + 2
+        for length_digits in range(1, 5):
+            total_length = base_size + length_digits
+            if len(str(total_length)) == length_digits:
+                break
+        length_str = str(total_length).encode('ascii')
+        payload = bytearray([SOH, STX]) + length_str + message_bytes + bytearray([ETX])
+        checksum = f"{self.calculate_checksum(payload):02x}".encode('ascii')
+        payload += checksum
+        return payload
+
+    def format_ct_response_readable(self, data):
+        # Show control characters as labels, printable ASCII as-is
+        def safe_char(byte):
+            if byte == SOH:
+                return '<SOH>'
+            elif byte == STX:
+                return '<STX>'
+            elif byte == ETX:
+                return '<ETX>'
+            elif 32 <= byte <= 126:
+                return chr(byte)
+            else:
+                return f'<0x{byte:02X}>'
+        return ''.join(safe_char(b) for b in data)
+
+    def udp_server(self):
+        udp_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        udp_sock.bind(("", UDP_PORT))
+        print(f"CTEmulator UDP server is listening on port {UDP_PORT}...")
+        try:
+            while not self._stop:
+                udp_sock.settimeout(1.0)
+                try:
+                    data, addr = udp_sock.recvfrom(1024)
+                except socket.timeout:
+                    continue
+                # Try CT001 (plain ASCII 'hame')
+                try:
+                    decoded = data.decode()
+                    if decoded == "hame":
+                        current_time = time.time()
+                        if (
+                            addr not in self._last_response_time
+                            or (current_time - self._last_response_time[addr]) > self.dedupe_time_window
+                        ):
+                            print(f"Received 'hame' from {addr}")
+                            udp_sock.sendto(b"ack", addr)
+                            self._last_response_time[addr] = current_time
+                            print(f"Sent 'ack' to {addr}")
+                        else:
+                            print(f"Received 'hame' from {addr} but ignored due to dedupe window")
+                        continue
+                except UnicodeDecodeError:
+                    pass  # Not a plain ASCII message
+                # Try CT002 protocol
+                fields, error = self.parse_ct002_request(data)
+                if error:
+                    print(f"Invalid CT002 request from {addr}: {error}")
+                    continue
+                # Discovery logic: only respond if CT MAC matches and battery MAC is valid
+                if len(fields) < 4:
+                    print(f"CT002 request from {addr} does not have enough fields for discovery check")
+                    continue
+                req_battery_mac = fields[1]
+                req_ct_mac = fields[3]
+                if req_ct_mac.lower() != self.ct_mac.lower() and req_ct_mac != "000000000000":
+                    print(f"Ignoring CT002 request from {addr}: CT MAC mismatch (got {req_ct_mac}, expected {self.ct_mac} or 000000000000)")
+                    continue
+                # Accept any battery MAC
+                # if req_battery_mac not in self.discovery_battery_macs and req_battery_mac != self.battery_mac:
+                #     print(f"Ignoring CT002 request from {addr}: Battery MAC {req_battery_mac} not in discovery list or not our battery MAC")
+                #     continue
+                print(f"Valid CT002 discovery/query request from {addr}: {fields}")
+                if self.before_send:
+                    self.before_send(addr)
+                response = self.build_ct002_response(fields)
+                print(f"CT002 response to {addr}: {response.hex()} | {self.format_ct_response_readable(response)}")
+                udp_sock.sendto(response, addr)
+                print(f"Sent CT002 response to {addr}")
+        finally:
+            udp_sock.close()
+
+    def handle_tcp_client(self, conn, addr):
+        print(f"TCP connection established with {addr}")
+        try:
+            data = conn.recv(1024)
+            decoded = data.decode()
+            if decoded == "hello":
+                print("Received 'hello'")
+                last_send_time = 0
+                while not self._stop:
+                    current_time = time.time()
+                    time_since_last_send = current_time - last_send_time
+                    if time_since_last_send >= self.poll_interval:
+                        if self.before_send:
+                            self.before_send(addr)
+                        with self._value_mutex:
+                            if self.value is None:
+                                print(f"No value to send to {addr}")
+                                break
+                            value1, value2, value3 = self.value
+                        value1 = round(value1)
+                        value2 = round(value2)
+                        value3 = round(value3)
+                        message = f"HM:{value1}|{value2}|{value3}"
+                        try:
+                            conn.send(message.encode())
+                            last_send_time = current_time
+                            print(f"Sent message to {addr}: {message}")
+                        except BrokenPipeError:
+                            print(f"Connection with {addr} broken. Waiting for a new connection.")
+                            break
+                        time.sleep(self.poll_interval)
+                    else:
+                        time.sleep(0.01)
+            else:
+                print(f"Received unknown TCP message: {decoded}")
+        finally:
+            conn.close()
+            print(f"Connection with {addr} closed")
+
+    def tcp_server(self):
+        tcp_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        tcp_sock.bind(("", UDP_PORT))
+        tcp_sock.listen(5)
+        print("CTEmulator TCP server is listening...")
+        try:
+            while not self._stop:
+                conn, addr = tcp_sock.accept()
+                client_thread = threading.Thread(
+                    target=self.handle_tcp_client, args=(conn, addr)
+                )
+                client_thread.start()
+        finally:
+            print("Stop listening for TCP connections")
+            tcp_sock.close()
+
+    def start(self):
+        if self._udp_thread or hasattr(self, '_tcp_thread') and self._tcp_thread:
+            return
+        self._stop = False
+        self._udp_thread = threading.Thread(target=self.udp_server)
+        self._tcp_thread = threading.Thread(target=self.tcp_server)
+        self._udp_thread.start()
+        self._tcp_thread.start()
+
+    def join(self):
+        if self._udp_thread:
+            self._udp_thread.join()
+        if hasattr(self, '_tcp_thread') and self._tcp_thread:
+            self._tcp_thread.join()
+
+    def stop(self):
+        self._stop = True
+        if self._udp_thread:
+            self._udp_thread.join()
+        if hasattr(self, '_tcp_thread') and self._tcp_thread:
+            self._tcp_thread.join()
+        self._udp_thread = None
+        if hasattr(self, '_tcp_thread'):
+            self._tcp_thread = None 
\ No newline at end of file
diff --git a/main.py b/main.py
index c73513f..982eeb1 100644
--- a/main.py
+++ b/main.py
@@ -7,6 +7,7 @@
 from powermeter import Powermeter
 from shelly import Shelly
 from collections import OrderedDict
+from ct002 import CTEmulator
 
 
 def test_powermeter(powermeter, client_filter):
@@ -84,6 +85,47 @@ def update_readings(addr):
 
         device.before_send = update_readings
 
+    elif device_type == "ct002":
+        # CT002-specific config (can be extended to use config/args)
+        device_type_str = cfg.get("GENERAL", "CT002_DEVICE_TYPE", fallback="HMG-50")
+        battery_mac = cfg.get("GENERAL", "CT002_BATTERY_MAC", fallback="001122334455")
+        ct_mac = cfg.get("GENERAL", "CT002_CT_MAC", fallback="009c17abcdef")
+        ct_type = cfg.get("GENERAL", "CT002_CT_TYPE", fallback="HME-4")
+        poll_interval = (
+            args.poll_interval
+            if args.poll_interval is not None
+            else cfg.getint("GENERAL", "POLL_INTERVAL", fallback=1)
+        )
+        print(f"CT002 Settings for {device_id}:")
+        print(f"Device Type: {device_type_str}")
+        print(f"Battery MAC: {battery_mac}")
+        print(f"CT MAC: {ct_mac}")
+        print(f"CT Type: {ct_type}")
+        print(f"Poll Interval: {poll_interval}")
+        device = CTEmulator(
+            device_type=device_type_str,
+            battery_mac=battery_mac,
+            ct_mac=ct_mac,
+            ct_type=ct_type,
+            poll_interval=poll_interval,
+        )
+        def update_readings(addr):
+            powermeter = None
+            for pm, client_filter in powermeters:
+                if client_filter.matches(addr[0]):
+                    powermeter = pm
+                    break
+            if powermeter is None:
+                print(f"No powermeter found for client {addr[0]}")
+                device.value = None
+                return
+            values = powermeter.get_powermeter_watts()
+            value1 = values[0] if len(values) > 0 else 0
+            value2 = values[1] if len(values) > 1 else 0
+            value3 = values[2] if len(values) > 2 else 0
+            device.value = [value1, value2, value3]
+        device.before_send = update_readings
+
     elif device_type == "shellypro3em_old":
         print(f"Shelly Pro 3EM Settings:")
         print(f"Device ID: {device_id}")
@@ -126,6 +168,7 @@ def main():
         nargs="+",
         choices=[
             "ct001",
+            "ct002",
             "shellypro3em",
             "shellyemg3",
             "shellyproem50",