Updating to new sending format of diy-sender

data_tables.py

@@ -19,6 +19,7 @@ class Sensor(Base):
     last_rain_value = Column(Float, default=0.0)  # Last reported rain value (for reset detection)
     node_id = Column(Integer, nullable=True)  # For pool sensors: the nodeId (1, 2, etc.) that generates mqtt_id
     sensor_type = Column(String(50), nullable=True)  # Sensor type: 'BME280', 'DS18B20', 'Bresser-6in1', etc.
+    last_contact = Column(DateTime, default=lambda: datetime.now(timezone.utc), nullable=True)  # Last transmission received from sensor
 
 # Define the TemperatureInside table
 class TemperatureInside(Base):

datacollector.py

@@ -193,6 +193,46 @@ def parse_radio_frame(byte_data):
     if not byte_data:
         return None
 
+    try:
+        sync_index = byte_data.find(b"\x2d")
+        if sync_index == -1:
+            return None
+
+        if sync_index + 1 >= len(byte_data):
+            # No room for networkId byte
+            return None
+
+        network_id = byte_data[sync_index + 1]
+        sync_len = 2
+
+        header_start = sync_index + sync_len
+        if header_start + 4 > len(byte_data):
+            return None
+
+        payload_len, dest_id, sender_id, ctl = struct.unpack_from('<BBBB', byte_data, header_start)
+        data_start = header_start + 4
+        data_end = data_start + payload_len
+        if data_end + 2 > len(byte_data):
+            # Not enough bytes for data + 2-byte CRC
+            return None
+
+        data = byte_data[data_start:data_end]
+        crc_bytes = byte_data[data_end:data_end + 2]
+
+        return {
+            'data': data,
+            'payload_len': payload_len,
+            'dest_id': dest_id,
+            'sender_id': sender_id,
+            'ctl': ctl,
+            'network_id': network_id,
+            'crc_bytes': crc_bytes,
+            'sync_index': sync_index,
+            'sync_len': sync_len,
+        }
+    except Exception:
+        return None
+
 
 PAYLOAD_SIZE = 15  # bytes in pool payload
 MAGIC1 = 0x42
@@ -271,46 +311,35 @@ def decode_pool_payload(candidate_bytes: bytes, expected_seq: Optional[int] = No
 
     return best
 
-    try:
-        # Find sync 0x2D followed by networkId (second byte)
-        sync_index = byte_data.find(b"\x2d")
-        if sync_index == -1:
-            return None
 
-        if sync_index + 1 >= len(byte_data):
+def extract_pool_candidate_bytes(raw_bytes: bytes):
-            # No room for networkId byte
+    """Return payload bytes for pool sensors, handling legacy and new radio framing.
-            return None
 
-        network_id = byte_data[sync_index + 1]
+    Tries legacy framed parsing first, then strips a 0xAA preamble and optional
-        sync_len = 2
+    sync bytes (0x39 0x14) used by the new hardware. Falls back to the stripped
+    raw stream so old payloads continue to work.
+    """
+    if not raw_bytes:
+        return b"", {"source": "empty"}
 
-        header_start = sync_index + sync_len
+    # Legacy framed format (rarely used but kept for compatibility)
-        if header_start + 4 > len(byte_data):
+    frame = parse_radio_frame(raw_bytes)
-            return None
+    if frame and frame.get('data'):
+        return frame['data'], {"source": "legacy_frame", "network_id": frame.get('network_id')}
 
-        payload_len, dest_id, sender_id, ctl = struct.unpack_from('<BBBB', byte_data, header_start)
+    trimmed = raw_bytes
-        data_start = header_start + 4
+    while trimmed.startswith(b"\xaa"):
-        data_end = data_start + payload_len
+        trimmed = trimmed[1:]
-        if data_end + 2 > len(byte_data):
-            # Not enough bytes for data + 2-byte CRC
-            return None
 
-        data = byte_data[data_start:data_end]
+    # New hardware emits sync bytes; support both 0x39 0x14 and 0xD3 0x91 variants
-        crc_bytes = byte_data[data_end:data_end + 2]
+    sync_patterns = [b"\x39\x14", b"\xd3\x91"]
+    for sync in sync_patterns:
+        idx = trimmed.find(sync)
+        if idx != -1 and idx + len(sync) < len(trimmed):
+            return trimmed[idx + len(sync):], {"source": "sync", "offset": idx, "sync": sync.hex()}
 
-        return {
+    # Fallback: use stripped raw stream (old hardware behaviour)
-            'data': data,
+    return trimmed, {"source": "raw"}
-            'payload_len': payload_len,
-            'dest_id': dest_id,
-            'sender_id': sender_id,
-            'ctl': ctl,
-            'network_id': network_id,
-            'crc_bytes': crc_bytes,
-            'sync_index': sync_index,
-            'sync_len': sync_len,
-        }
-    except Exception:
-        return None
 
 def refresh_sensor_cache():
     """Refresh the sensor cache from database"""
@@ -469,9 +498,15 @@ def on_message(client, userdata, msg):
                         malformed_hex_logger.info(f"Pool message missing data: {d}")
                     return
 
-                # Strip optional 'aaaaaa' prefix if present (old format)
+                # Strip any length of 'aa' preamble (old/new formats)
-                if hex_data.startswith('aaaaaa'):
+                while hex_data.startswith('aa'):
-                    hex_data = hex_data[6:]
+                    hex_data = hex_data[2:]
+
+                # Some rtl_433 captures occasionally lose the final nibble; drop it to keep hex even-length
+                if len(hex_data) % 2 == 1:
+                    if LOG_MALFORMED_HEX:
+                        malformed_hex_logger.info(f"Trimming odd-length hex (dropped last nibble): {hex_data}")
+                    hex_data = hex_data[:-1]
 
                 try:
                     byte_data = bytes.fromhex(hex_data)
@@ -483,25 +518,15 @@ def on_message(client, userdata, msg):
                     warte = ''
                     return
 
-                # Attempt to parse the radio frame first (preamble/sync/header/data/crc)
+                candidate_bytes, candidate_meta = extract_pool_candidate_bytes(byte_data)
-                frame = parse_radio_frame(byte_data)
+                if LOG_MALFORMED_HEX and candidate_meta.get("source") == "raw":
-                if frame and frame.get('data'):
+                    malformed_hex_logger.info(f"Pool using raw bytes (no sync match): {byte_data.hex()}")
-                    print(
-                        f"Parsed radio frame: netId={frame.get('network_id')}, len={frame['payload_len']}, "
-                        f"dest={frame['dest_id']}, sender={frame['sender_id']}, ctl={frame['ctl']}, crc={frame['crc_bytes'].hex()}"
-                    )
-                    candidate_bytes = frame['data']
-                else:
-                    # Fallback: Drop optional leading 0xAA bytes from hardware and use raw stream
-                    if LOG_MALFORMED_HEX and not frame:
-                        malformed_hex_logger.info(f"Frame parse failed: {byte_data.hex()}")
-                    tmp = byte_data
-                    while tmp.startswith(b"\xaa"):
-                        tmp = tmp[1:]
-                    candidate_bytes = tmp
 
                 print(f"Raw bytes ({len(byte_data)}): {byte_data.hex()}")
-                print(f"Candidate payload for app decode ({len(candidate_bytes)}): {candidate_bytes.hex()}")
+                print(
+                    f"Candidate payload ({len(candidate_bytes)}), source={candidate_meta.get('source')}: "
+                    f"{candidate_bytes.hex()}"
+                )
 
                 # Decode payload by sliding-window detection (magic bytes may be missing)
                 expected_seq = None
@@ -799,6 +824,10 @@ def store_in_db(utc_time, mqtt_name_id, temperature_c, humidity, pressure_rel, b
 
     # Update the sensor's battery level
     sensor.battery = battery
+    
+    # Update last contact time for pool sensors
+    if mqtt_name == 'pool':
+        sensor.last_contact = datetime.now(timezone.utc)
 
     # Update the temperature data
     if temperature_c is not None:

test_pool_decode.py

@@ -3,7 +3,7 @@
 
 import json
 import struct
-from typing import Optional
+from typing import Optional, Tuple, Dict
 
 PAYLOAD_SIZE = 15
 MAGIC1 = 0x42
@@ -83,72 +83,49 @@ def decode_pool_payload(candidate_bytes: bytes, expected_seq: Optional[int] = No
     return best
 
 
-# Test with the actual MQTT message
+def build_payload(seq: int, t_ds10: int, t_bme10: int, hum10: int, pres1: int) -> bytes:
-mqtt_message = {
+    """Build a valid payload with CRC appended."""
-    "time": "2025-12-27T13:26:47",
+    header = struct.pack('<BBBBHhhHH', MAGIC1, MAGIC2, 1, 1, seq, t_ds10, t_bme10, hum10, pres1)
-    "model": "pool",
+    crc = crc8_xor(header)
-    "count": 1,
+    return header + bytes([crc])
-    "num_rows": 1,
-    "rows": [
-        {
-            "len": 143,
-            "data": "429901013400a801f6002b0294272a000000"
-        }
-    ],
-    "codes": ["{143}429901013400a801f6002b0294272a000000"]
-}
 
-print("Testing pool payload decode with new MQTT format:")
-print(f"MQTT message: {json.dumps(mqtt_message, indent=2)}")
-print()
 
-hex_data = mqtt_message['rows'][0]['data']
+def extract_pool_candidate_bytes(raw_bytes: bytes) -> Tuple[bytes, Dict[str, str]]:
-print(f"Hex data from rows[0]['data']: {hex_data}")
+    """Mirror runtime extraction: strip 0xAA preamble and optional sync bytes."""
-print(f"Hex data length: {len(hex_data)} chars ({len(hex_data)//2} bytes)")
+    trimmed = raw_bytes
+    while trimmed.startswith(b"\xaa"):
+        trimmed = trimmed[1:]
 
-# Strip 'aaaaaa' prefix if present
+    for sync in (b"\x39\x14", b"\xd3\x91"):
-if hex_data.startswith('aaaaaa'):
+        idx = trimmed.find(sync)
-    hex_data = hex_data[6:]
+        if idx != -1 and idx + len(sync) < len(trimmed):
-    print(f"Stripped 'aaaaaa' prefix, remaining: {hex_data}")
+            return trimmed[idx + len(sync):], {"source": "sync", "offset": idx, "sync": sync.hex()}
 
-byte_data = bytes.fromhex(hex_data)
+    return trimmed, {"source": "raw"}
-print(f"Byte data: {byte_data.hex()}")
-print()
 
-# Decode with sliding window
-decoded = decode_pool_payload(byte_data)
 
-if decoded:
+def demo_decode(hex_stream: str, label: str):
-    print("✓ Payload decoded successfully!")
+    print(f"\n--- {label} ---")
-    print(json.dumps(decoded, indent=2))
+    byte_stream = bytes.fromhex(hex_stream)
-    
+    candidate_bytes, meta = extract_pool_candidate_bytes(byte_stream)
-    print()
+    print(f"candidate source={meta['source']}, len={len(candidate_bytes)}, hex={candidate_bytes.hex()}")
-    print("Generated sensor messages:")
+    decoded = decode_pool_payload(candidate_bytes)
-    
+    if decoded:
-    bme_msg = {
+        print("✓ Decoded:")
-        'time': mqtt_message['time'],
+        print(json.dumps(decoded, indent=2))
-        'model': 'pool',
+    else:
-        'id': decoded['nodeId'] * 10 + 1,
+        print("✗ Failed to decode")
-        'battery_ok': 1,
+
-        'temperature_C': decoded['t_bme_c'],
+
-        'humidity': decoded['humidity'],
+# Construct a known-good payload and embed it in the new frame layout (aa preamble + sync 0x39 0x14)
-        'pressure_rel': decoded['pressure_hpa'],
+payload = build_payload(seq=0x013d, t_ds10=231, t_bme10=223, hum10=550, pres1=10123)
-        'mic': 'CRC'
+preamble = b"\xaa" * 8
-    }
+sync = b"\x39\x14"
-    
+new_frame_hex = (preamble + sync + payload).hex()
-    ds_msg = {
+
-        'time': mqtt_message['time'],
+# Legacy frame: just the payload bytes
-        'model': 'pool',
+legacy_hex = payload.hex()
-        'id': decoded['nodeId'] * 10 + 2,
+
-        'battery_ok': 1,
+print("Testing pool payload decoding for both hardware generations")
-        'temperature_C': decoded['t_ds_c'],
+demo_decode(new_frame_hex, "New hardware (preamble + sync)")
-        'mic': 'CRC'
+demo_decode(legacy_hex, "Legacy hardware (bare payload)")
-    }
-    
-    print("BME280 message:")
-    print(json.dumps(bme_msg, indent=2))
-    print()
-    print("DS18B20 message:")
-    print(json.dumps(ds_msg, indent=2))
-else:
-    print("✗ Failed to decode payload!")