# Note Current State
This is at a really early stage, I stated on the implementation of the serial protocol.

# NsPanel Custom Widget UI

This is a replacement for the stock ui on nspanel, it can be controlled via custom serial command, like the stock one (but with different commands). This enables a user experiance, where it's possible to use nspanel with custom UI, but without messing around with Nextion Editor, because it's possible to configure widgets.

# Custom Protocol
```
55 BB [payload length] [payload] [crc] [crc]
```

Payload length contains the number of bytes of the payload.

CRC is "CRC-16 (MODBUS) Big Endian" calculated over the payload

This protocol does not try to implement broken JSON Commands with a specified type (lol).
Instead the commands are plain text commands with parameters.

## Example for valid Message
This message has to be generated for the Message "1337" (1337 is not a valid command, this is just an example)
```
55 BB  04  31 33 33 37  AB F1
```
## Message to Nextion Display

| Payload | Example | Parameters | Description |
|---|---|---|---|
| `widget <id> <type> <status> <name>` | `widget b0 shutter 1 name` | `<id>` of the Button to be enabled `<type>` - Type of the Button / Page `<status>` - Disable or Enable (0/1) <name> - Name below the Button |  |
|  |  |  |  |

## Message from Nextion Display

| Payload | Example | Parameters | Description |
|---|---|---|---|
| `event widgetPage <page>` | `event widgetPage 0` | `<page>` is the number of the current page, there is currently only page 0 | Is fired, after switching to widgetPage, has to be answered with widget message |
|  |  |  |  |