docs: add some docs

I made this a while back, it is very incomplete, just adding in case anyone's looking for the opcodes

docs/control_commands.md

@@ -17,7 +17,7 @@ Bytes that are not used are set to `0x00`. From what I've observed, the `data3`
 ## Identifiers and details 
 
 | Command identifier | Description                                    |
-|--------------|---------------------|
+| ------------------ | ---------------------------------------------- |
 | 0x01               | Mic Mode                                       |
 | 0x05               | Button Send Mode                               |
 | 0x06               | Owns connection                                |

docs/device-info.md

@@ -0,0 +1,26 @@
+---
+opcode: 0x001D
+title: Device Information
+description: Information about AirPods, such as model, firmware version, and serial number. This can not be requested from the accessory; it is only sent by the accessory to the host upon connection.
+---
+
+## Device information
+
+The device information packet is sent by the accessory to the host upon connection. It contains various details about the AirPods, including model number, software version, and serial number.
+
+Each `null` indicates the start of a new string field.
+
+The data is in this order:
+- Name
+- Model number
+- Manufacturer (always "Apple Inc.")
+- Serial number
+- Version 1
+- Version 2
+- Hardware revision (?) (I have `1.0.0`)
+- Updater app version (?) (I have `com.apple.accessory.updater.app.71`)
+- Serial number (Left Bud)
+- Serial number (Right Bud)
+- Version (?) (I have `8454371`)
+- A few more bytes, I don't know what they are
+

docs/opcodes.md

@@ -0,0 +1,33 @@
+# AACP opcodes
+
+AACP (Apple Accessory Communication Protocol) uses various opcodes to define different types of actions and commands. Each opcode is a 16-bit integer that specifies the kind of operation being performed. The opcode is sent in little-endian format as part of the AACP packet structure.
+
+
+| Opcode (Hex) | Destination | Description                                                        |
+| ------------ | ----------- | ------------------------------------------------------------------ |
+| 0x0001       | Accessory   | Unknown                                                            |
+| 0x0004       | Host        | [Battery report](/docs/battery_report.md)                          |
+| 0x0006       | Host        | [Ear detection](/docs/ear-detection_report.md)                     |
+| 0x0009       | Both        | [Control commands](/docs/control_commands.md)                      |
+| 0x000D       | Accessory   | [Audio source req](/docs/audio-source.md)                          |
+| 0x000E       | Host        | [Audio source resp](/docs/audio-source.md)                         |
+| 0x000F       | Accessory   | [Notification register](/docs/notification-register.md)            |
+| 0x0010       | Accessory   | [Smart routing relay](/docs/smart-routing-relay.md#send)           |
+| 0x0011       | Host        | [Smart routing response](/docs/smart-routing-relay.md#receive)     |
+| 0x0014       | Accessory   | Send connected device MAC                                          |
+| 0x0017       | Both        | Multiple things - undocumented                                     |
+| 0x0019       | Host        | [Stem press](/docs/stem-press.md)                                  |
+| 0x001B       | Accessory   | [Timestamp](/docs/timestamp.md)                                    |
+| 0x001D       | Host        | [Device Information](/docs/device-info.md)                         |
+| 0x001E       | Accessory   | [Rename device](/docs/rename.md)                                   |
+| 0x0022       | Accessory   | Unknown                                                            |
+| 0x0029       | Accessory   | [Host capabilities](/docs/host-capabilities.md#another-opcode) (?) |
+| 0x002B       | Host        | Paired devices (?)                                                 |
+| 0x002D       | Accessory   | [List of connected dev. req](/docs/connected-devices.md#send)      |
+| 0x002E       | Host        | [List of connected devices](/docs/connected-devices.md#receive)    |
+| 0x0030       | Accessory   | [BLE keys req](/docs/ble-keys.md)                                  |
+| 0x0031       | Host        | [BLE keys response](/docs/ble-keys.md)                             |
+| 0x004B       | Host        | [Conversation awareness](/docs/conversational-awareness.md)        |
+| 0x004D       | Accessory   | [Host capabilities](/docs/host-capabilities.md)                    |
+| 0x004F       | Both        | Information req/res (doesn't work, even with apple's DID)          |
+| 0x0053       | Both        | [EQ data](/docs/eq.md)                                             |