### Message ID
| ID  | Message Type         | Direction    |
| --- | -------------------- | ------------ |
| 81  | Push Package         | Host <-> Hub |
| 82  | Perform Scan         | Host -> Hub  |
| 83  | Scan Result          | Host <- Hub  |
| 84  | PackageSlot Update   | Host <- Hub  |
| 85  | REQ PackageSlot Info | Host -> Hub  |
| fe  | Header Beat          | Host <- Hub  |
| ff  | Get Info             | Host <-> Hub |


### Device Types
| ID  | Type |
| --- | ---- |
| 01  | Hub  |


## Message Structure
### Push Package (1) (Host <-> Hub)
| Offset | Description                            |
| ------ | -------------------------------------- |
| 1      | ID 81                                  |
| 1      | Length (max 28 bytes)                  |
| 1      | Type (......XX), RPCNumber (XXXX....)y |
| 4      | Address                                |
| Length | Package Data                           |

### Perform Scan (2) (Host -> Hub)
| Offset | Description            |
| ------ | ---------------------- |
| 00     | ID 82                  |
| 01     | Start (01) / Stop (00) |

### Scan Result (3) (Hub -> Host)
| Size | Description                        |
| ---- | ---------------------------------- |
| 1    | ID 83                              |
| 1    | Scann Running (Yes (01) / No (00)) |
| 4    | Address                            |
| 1    | Type (See Devices Types)           |

### Slot Update (4) (Hub -> Host)
| Size | Description                            |
| ---- | -------------------------------------- |
| 1    | ID 84                                  |
| 1    | Status (1X/0X Completed, X1/X0 in use) |
| 1    | Slot Number                            |
| 4    | Device Address                         |
| 4    | Timestamp                              |
| 4    | Used Bits                              |
Total: 16 bytes

### Req Slot Update (5) (Host -> Hub)
| Offset | Descript             |
| ------ | -------------------- |
| 00     | ID 85                |
| 01     | Enable Updates (1/0) |

### Heart Beat (fe) (Hub -> Host)
| Sizes | Description |
| ----- | ----------- |
| 1     | ID ff       |

### Get Info (ff) (Hub -> Host) (Host -> Hub, only ID)
| Sizes | Description     |
| ----- | --------------- |
| 1     | ID ff           |
| 1     | Number of Slots |