WE DID IT I FIXED THE STUPID BLE HEADER AND IT WORKED

relay/bluetooth_handler.py

@@ -1,4 +1,5 @@
 import bluetooth
+import struct
 from micropython import const
 
 
@@ -16,17 +17,36 @@ IRQ_CONNECT = const(1)
 IRQ_DISCONNECT = const(2)
 IRQ_GATTS_WRITE = const(3)
 
+# Advertising payloads are repeated packets of the following form:
+#   1 byte data length (N + 1)
+#   1 byte type (see constants below)
+#   N bytes type-specific data
+
+_ADV_TYPE_FLAGS = const(0x01)
+_ADV_TYPE_NAME = const(0x09)
+_ADV_TYPE_UUID16_COMPLETE = const(0x3)
+_ADV_TYPE_UUID32_COMPLETE = const(0x5)
+_ADV_TYPE_UUID128_COMPLETE = const(0x7)
+_ADV_TYPE_UUID16_MORE = const(0x2)
+_ADV_TYPE_UUID32_MORE = const(0x4)
+_ADV_TYPE_UUID128_MORE = const(0x6)
+_ADV_TYPE_APPEARANCE = const(0x19)
+
+_ADV_MAX_PAYLOAD = const(31)
+
 
 class BluetoothHandler:
     def __init__(self):
         print("Initializing Bluetooth...")
         self.ble = bluetooth.BLE()
+        print("Activating...")
         self.ble.active(True)
+        print("Setting IRQ callback...")
         self.ble.irq(self.irq)
         
-        
+        print("Getting MAC address...")
         self.mac_address = self._get_mac_address()
-        print(f"Mac Address: {self.mac_address}")
+        print(f"MAC address: {self.mac_address}")
         self.ble.config(gap_name="NODE-" + self.mac_address)
         
         ((self.tx_handle, self.rx_handle),) = self.ble.gatts_register_services((SERVICE,))
@@ -38,11 +58,44 @@ class BluetoothHandler:
     def _get_mac_address(self):
         mac = self.ble.config("mac")[1]
         return ':'.join('{:02X}'.format(b) for b in mac)
+    
+    def advertising_payload(limited_disc=False, br_edr=False, name=None, services=None, appearance=0):
+        payload = bytearray()
+
+        def _append(adv_type, value):
+            nonlocal payload
+            payload += struct.pack("BB", len(value) + 1, adv_type) + value
+
+        _append(
+            _ADV_TYPE_FLAGS,
+            struct.pack("B", (0x01 if limited_disc else 0x02) + (0x18 if br_edr else 0x04)),
+        )
+
+        if name:
+            _append(_ADV_TYPE_NAME, name)
+
+        if services:
+            for uuid in services:
+                b = bytes(uuid)
+                if len(b) == 2:
+                    _append(_ADV_TYPE_UUID16_COMPLETE, b)
+                elif len(b) == 4:
+                    _append(_ADV_TYPE_UUID32_COMPLETE, b)
+                elif len(b) == 16:
+                    _append(_ADV_TYPE_UUID128_COMPLETE, b)
+
+        # See org.bluetooth.characteristic.gap.appearance.xml
+        if appearance:
+            _append(_ADV_TYPE_APPEARANCE, struct.pack("<h", appearance))
+
+        if len(payload) > _ADV_MAX_PAYLOAD:
+            raise ValueError("advertising payload too large")
+
+        return payload
         
     def advertise(self):
         print("Advertising Bluetooth...")
-        # note: \x02\x01\x06\x0C\x09 is the BLE header that tells other devices we're BLE only and discoverable
-        self.ble.gap_advertise(100_000, b"\x02\x01\x06\x0C\x09NODE-" + self.mac_address.encode())
+        self.ble.gap_advertise(100_000, self.advertising_payload(name="MeshNode", services=[SERVICE_UUID]))
         
     def irq(self, event, data):
         print(f"BLUETOOTH IRQ | EVENT: {event}, DATA: {data}")