miio.dart

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Dart implementation for MIIO LAN protocol.

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# MiIO

Dart implementation for MiIO LAN protocol.

The protocol an encrypted, binary protocol based on UDP (port 54321), which is used to configure & control smart home devices made by Xiaomi Ecosystem.

## CLI

The package contains a simple CLI program that built on top of miio.

### Installation

- Activate from Pub:

```sh
    pub global activate miio
    ```

- Download pre-built binary from [Github Action](https://github.com/ctrysbita/miio.dart/actions)

### Example

```sh
# Send discover packet to broadcast IP.
miio discover --ip 192.168.1.255

# Send packet to device.
miio send --ip 192.168.1.100 --token ffffffffffffffffffffffffffffffff --payload '{\"id\": 1, \"method\": \"miIO.info\", \"params\": []}'

# Or use device API.
# Legacy:
miio device --ip 192.168.1.100 --token ffffffffffffffffffffffffffffffff props -p power
miio device --ip 192.168.1.100 --token ffffffffffffffffffffffffffffffff call -m set_power -p on
# MIoT Spec:
miio device --ip 192.168.1.100 --token ffffffffffffffffffffffffffffffff property -s 2 -p 1
miio device --ip 192.168.1.100 --token ffffffffffffffffffffffffffffffff property -s 2 -p 1 -v true
```

## Protocol

```
 0                   1                   2                   3
 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Magic Number = 0x2131         | Packet Length (incl. header)  |
|-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
| Unknown                                                       |
|-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
| Device ID ("did")                                             |
|-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
| Stamp                                                         |
|-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
| MD5 Checksum                                                  |
| ... or Device Token in response to the "Hello" packet         |
|-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
| Optional variable-sized payload (encrypted)                   |
|...............................................................|

Packet Length: 16 bits unsigned int
    Length in bytes of the whole packet, including header(0x20 bytes).

Unknown: 32 bits
    This value is always 0.
    0xFFFFFFFF in "Hello" packet.

Device ID: 32 bits
    Unique number. Possibly derived from the MAC address.
    0xFFFFFFFF in "Hello" packet.

Stamp: 32 bit unsigned int
    Continously increasing counter.
    Number of seconds since device startup.

MD5 Checksum:
    Calculated for the whole packet including the MD5 field itself,
    which must be initialized with token.

In "Hello" packet,
    this field contains the 128-bit 0xFF.

In the response to the first "Hello" packet,
    this field contains the 128-bit device token.

Optional variable-sized payload:
    Payload encrypted with AES-128-CBC (PKCS#7 padding).

Key = MD5(Token)
        IV  = MD5(Key + Token)
```

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