Note Current State

This is at a really early stage, I started 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 whole message

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  5F 5B

Messages to Nextion Display

Widget Page

Payload	Example	Parameter 1	Parameter 2	Parameter 3	Parameter 4	Description
widget,id,type,status,name	widget,b0,shutter,1,name	id of widget Possible values: - b[0-7]	type of the action the widget should do Possible values: - shutter - opens shutter page	enable or disable Possible values: - 0 - disbale/hide - 1 - enable/show	name of the widget, will be displayed below the widget	Modify Widgets on Page

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