API

Nextion Constants

Const

This file contains the constant definitions of all Nextion commands

nextion.const.NEX_END_CMD = b'\xff\xff\xff': End command

nextion.const.NEX_RET_CMD_FINISHED = <Mock name='mock.const()' id='140221200069680'>: Command finished

nextion.const.NEX_RET_CURRENT_PAGE_ID_HEAD = <Mock name='mock.const()' id='140221200069680'>: Current page ID head

nextion.const.NEX_RET_EVENT_LAUNCHED = <Mock name='mock.const()' id='140221200069680'>: Event launched

nextion.const.NEX_RET_EVENT_POSITION_HEAD = <Mock name='mock.const()' id='140221200069680'>: Event position head

nextion.const.NEX_RET_EVENT_SLEEP_POSITION_HEAD = <Mock name='mock.const()' id='140221200069680'>: Event sleep position head

nextion.const.NEX_RET_EVENT_TOUCH_HEAD = <Mock name='mock.const()' id='140221200069680'>: Event touch head

nextion.const.NEX_RET_EVENT_UPGRADED = <Mock name='mock.const()' id='140221200069680'>: Event upgraded

nextion.const.NEX_RET_INVALID_BAUD = <Mock name='mock.const()' id='140221200069680'>: Invalid baudrate

nextion.const.NEX_RET_INVALID_CMD = <Mock name='mock.const()' id='140221200069680'>: Invalid command

nextion.const.NEX_RET_INVALID_COMPONENT_ID = <Mock name='mock.const()' id='140221200069680'>: Invalid component ID

nextion.const.NEX_RET_INVALID_FONT_ID = <Mock name='mock.const()' id='140221200069680'>: Invalid font ID

nextion.const.NEX_RET_INVALID_OPERATION = <Mock name='mock.const()' id='140221200069680'>: Invalid operation

nextion.const.NEX_RET_INVALID_PAGE_ID = <Mock name='mock.const()' id='140221200069680'>: Invalid page ID

nextion.const.NEX_RET_INVALID_PICTURE_ID = <Mock name='mock.const()' id='140221200069680'>: Invalid picture ID

nextion.const.NEX_RET_INVALID_VARIABLE = <Mock name='mock.const()' id='140221200069680'>: Invalid variable

nextion.const.NEX_RET_NUMBER_HEAD = <Mock name='mock.const()' id='140221200069680'>: Number head

nextion.const.NEX_RET_STRING_HEAD = <Mock name='mock.const()' id='140221200069680'>: String head

Common module

Common

Common functions shared accross all Nextion elements

Check the description of Mixin https://realpython.com/lessons/multiple-inheritance-python/

class nextion.common.Common(nh, pid: int, cid: int, name: str)[source]

Bases: object

docstring for Common

property cid: int

Get component ID of element

Returns: Component ID
Return type: int

hide() → bool[source]

Hide component on screen

Returns: True on success, false otherwise
Return type: bool

property name: str

Get name of element

Returns: Name of element
Return type: str

property pid: int

Get page ID of element

Returns: Page ID
Return type: int

show() → bool[source]

Show component on screen

Returns: True on success, false otherwise
Return type: bool

class nextion.common.CommonBackgroundColorMixin[source]

Bases: object

docstring for CommonBackgroundColorMixin

Get_background_color_bco() → int[source]

Get background color attribute of component

Returns: The background color
Return type: int

Set_background_color_bco(number: int) → bool[source]

Set background color attribute of component

Parameters: number (int) – The background color number
Returns: True on success, false otherwise
Return type: bool

exception nextion.common.CommonError[source]

Bases: Exception

Base class for exceptions in this module.

class nextion.common.CommonFontMixin[source]

Bases: object

docstring for CommonFontMixin

Get_font_color_pco() → int[source]

Get font color attribute of component

Returns: The font color
Return type: int

Set_font_color_pco(number: int) → bool[source]

Set font color attribute of component

Parameters: number (int) – The font color number
Returns: True on success, false otherwise
Return type: bool

getFont() → int[source]

Get font attribute of component

Returns: The font color
Return type: int

setFont(number: int) → bool[source]

Set font attribute of component

Parameters: number (int) – The font number
Returns: True on success, false otherwise
Return type: bool

class nextion.common.CommonPointerMixin[source]

Bases: object

docstring for CommonPointerMixin

Get_pointer_thickness_wid() → int[source]

Get pointer wid attribute of component

Returns: The pointer thickness
Return type: int

Set_pointer_thickness_wid(number: int) → bool[source]

Set pointer hig attribute of component

Parameters: number (int) – The pointer thickness
Returns: True on success, false otherwise
Return type: bool

class nextion.common.CommonPositionMixin[source]

Bases: object

docstring for CommonPositionMixin

Get_place_xcen() → int[source]

Get xcen attribute of component

Returns: The x position
Return type: int

Get_place_ycen() → int[source]

Get ycen attribute of component

Returns: The y position
Return type: int

Set_place_xcen(number: int) → bool[source]

Get xcen attribute of component

Parameters: number (int) – The new x position
Returns: True on success, false otherwise
Return type: bool

Set_place_ycen(number: int) → bool[source]

Get ycen attribute of component

Parameters: number (int) – The new y position
Returns: True on success, false otherwise
Return type: bool

class nextion.common.CommonTextMixin[source]

Bases: object

docstring for CommonTextMixin

getText() → str[source]

Get text attribute of component

Returns: The text.
Return type: str

setText(text: str) → bool[source]

Set text attribute of component

Parameters: text (str) – The text
Returns: True on success, false otherwise
Return type: bool

class nextion.common.CommonValueMixin[source]

Bases: object

docstring for CommonValueMixin

getValue() → int[source]

Get value attribute of component

Returns: The value.
Return type: int

setValue(value: int) → bool[source]

Set value attribute of component

Parameters: text (int) – The value
Returns: True on success, false otherwise
Return type: bool

Button

NexButton

Functions to interact with a Nextion Button element

class nextion.nextion_button.NexButton(nh, pid: int, cid: int, name: str)[source]

Bases: Common, CommonBackgroundColorMixin, CommonFontMixin, CommonPositionMixin, CommonTextMixin

docstring for NexButton

Get_press_background_color_bco2() → int[source]

Get the pressed background color

Returns: The pressed background color bco2
Return type: int

Get_press_font_color_pco2() → int[source]

Get the pressed font color

Returns: The pressed font color pco2
Return type: int

Set_press_background_color_bco2(number: int) → bool[source]

Set the pressed background color

Parameters: number (int) – The background color number
Returns: True on success, false otherwise
Return type: bool

Set_press_font_color_pco2(number: int) → bool[source]

Set the pressed font color

Parameters: number (int) – The font color number
Returns: True on success, false otherwise
Return type: bool

exception nextion.nextion_button.NexButtonError[source]

Bases: Exception

Base class for exceptions in this module.

Checkbox

NexCheckbox

Functions to interact with a Nextion Checkbox element

class nextion.nextion_checkbox.NexCheckbox(nh, pid: int, cid: int, name: str)[source]

Bases: Common, CommonBackgroundColorMixin, CommonFontMixin, CommonValueMixin

docstring for NexCheckbox

exception nextion.nextion_checkbox.NexCheckboxError[source]

Bases: Exception

Base class for exceptions in this module.

Dual State Button

NexDSButton

Functions to interact with a Nextion dual state Button element

class nextion.nextion_dual_state_button.NexDSButton(nh, pid: int, cid: int, name: str)[source]

Bases: Common, CommonFontMixin, CommonPositionMixin, CommonTextMixin, CommonValueMixin

docstring for NexDSButton

Get_state0_color_bco0() → int[source]

Get bco0 attribute of component

Returns: The background color
Return type: int

Get_state1_color_bco1() → int[source]

Get bco1 attribute of component

Returns: The background color
Return type: int

Set_state0_color_bco0(number: int) → bool[source]

Set bco0 attribute of component

Parameters: number (int) – The background color number
Returns: True on success, false otherwise
Return type: bool

Set_state1_color_bco1(number: int) → bool[source]

Set bco1 attribute of component

Parameters: number (int) – The background color number
Returns: True on success, false otherwise
Return type: bool

exception nextion.nextion_dual_state_button.NexDSButtonError[source]

Bases: Exception

Base class for exceptions in this module.

Gauge

NexGauge

Functions to interact with a Nextion Gauge element

class nextion.nextion_gauge.NexGauge(nh, pid: int, cid: int, name: str)[source]

Bases: Common, CommonBackgroundColorMixin, CommonFontMixin, CommonPointerMixin, CommonValueMixin

docstring for NexGauge

exception nextion.nextion_gauge.NexGaugeError[source]

Bases: Exception

Base class for exceptions in this module.

GPIO

NexGpio

Functions to interact with Nextion GPIOs

class nextion.nextion_gpio.NexGpio(nh)[source]

Bases: Common

docstring for NexGpio

analog_write(port: int, value: int) → bool[source]

Set analog value (PWM wave) to a pin

Parameters

port (int) – The GPIO port number
value (int) – The duty cycle value (0-100)

Returns

True on success, false otherwise

Return type

bool

digital_read(port: int) → int[source]

Read a HIGH or a LOW value of a digital pin

Parameters: port (int) – The GPIO port number
Returns: Value of specified digital pin, either 1 or 0
Return type: int

digital_write(port: int, value: int) → bool[source]

Write a HIGH or LOW value to a digital pin

Parameters

port (int) – The GPIO port number
value (int) – The value (0 or 1)

Returns

True on success, false otherwise

Return type

bool

get_pwmfreq() → int[source]

Get the PWM output frequency

Returns: The PWM frequency.
Return type: int

pin_mode(port: int, mode: int, control_id: int = 0) → bool[source]

Set GPIO mode

Parameters

port (int) – The GPIO port number
mode (int) – The GPIO port mode 0 - Pull on the input 1 - the control input binding 2 - Push-pull output 3 - pwm output 4 - open mode leakage
control_id (int) – The bound CID of other nextion element

Returns

True on success, false otherwise

Return type

bool

set_pwmfreq(value: int) → bool[source]

Set the PWM output frequency for all pins

Parameters: value (int) – The PWM frequency (1-65535)
Returns: True on success, false otherwise
Return type: bool

exception nextion.nextion_gpio.NexGpioError[source]

Bases: Exception

Base class for exceptions in this module.

Hardware

Common

This class performs the basic and common interactions with the Nextion display

Known issues

sendCommand uses the default timeout, but should use timeout = 0 https://github.com/micropython/micropython/issues/3434

class nextion.nextion_hardware.NexHardware(rx_pin: int, tx_pin: int, uart_id: int = 1, baudrate: None = 9600, timeout: None = 100, invert: None = 0, logger: None = None)[source]

Bases: object

docstring for NexHardware

_uart_init() → None[source]: Init UART instance

brightness(value: int) → None[source]

Set brightness of display

Parameters: value (int) – The value in percent [0, 100]

static create_logger(logger_name: None = None) → Logger[source]

Create a logger.

Parameters: logger_name (str, optional) – The logger name
Returns: Configured logger
Return type: logging.Logger

nexInit() → bool[source]

Init Nextion interface to display

Returns: Result of init, True on success, False otherwise
Return type: bool

recvRetCommandFinished(timeout: int = 100) → bool[source]

Command is executed successfully

Parameters: timeout (int) – The communication timeout
Returns: True on success, False otherwise
Return type: bool

recvRetNumber(timeout: int = 100) → int[source]

Receive a uint32_t number

Parameters: timeout (int) – The communication timeout
Returns: Received number
Return type: int

recvRetString(timeout: int = 100) → str[source]

Receive a string

Parameters: timeout (int) – The communication timeout
Returns: Received string
Return type: int

reset() → None[source]: Reset display like on a power cycle

sendCommand(cmd: str) → None[source]

Send a command to the Nextion serial display.

Parameters: cmd (str) – The command

sleep(state: bool) → None[source]

Control display sleep state

Parameters: state (bool) – Flag, True is sleep mode, False is wakeup

exception nextion.nextion_hardware.NexHardwareError[source]

Bases: Exception

Base class for exceptions in this module.

Number

NexNumber

Functions to interact with a Nextion Number element

class nextion.nextion_number.NexNumber(nh, pid: int, cid: int, name: str)[source]

Bases: Common, CommonBackgroundColorMixin, CommonFontMixin, CommonPositionMixin, CommonValueMixin

docstring for NexNumber

Get_number_length() → int[source]

Get length attribute of component

Returns: The number length
Return type: int

Set_number_length(number: int) → bool[source]

Set length attribute of component

Parameters: number (int) – The number length
Returns: True on success, false otherwise
Return type: bool

exception nextion.nextion_number.NexNumberError[source]

Bases: Exception

Base class for exceptions in this module.

Page

NexPage

Functions to interact with a Nextion Page element

class nextion.nextion_page.NexPage(nh, pid: int, cid: int, name: str)[source]

Bases: Common

docstring for NexPage

show() → bool[source]

Show itself

Returns: True on success, false otherwise
Return type: bool

exception nextion.nextion_page.NexPageError[source]

Bases: Exception

Base class for exceptions in this module.

Progressbar

NexProgressBar

Functions to interact with a Nextion Progressbar element

class nextion.nextion_progressbar.NexProgressBar(nh, pid: int, cid: int, name: str)[source]

Bases: Common, CommonBackgroundColorMixin, CommonFontMixin, CommonValueMixin

docstring for NexProgressBar

exception nextion.nextion_progressbar.NexProgressBarError[source]

Bases: Exception

Base class for exceptions in this module.

Radio Button

NexRadio

Functions to interact with a Nextion Radio element

class nextion.nextion_radio.NexRadio(nh, pid: int, cid: int, name: str)[source]

Bases: Common, CommonBackgroundColorMixin, CommonFontMixin, CommonValueMixin

docstring for NexRadio

exception nextion.nextion_radio.NexRadioError[source]

Bases: Exception

Base class for exceptions in this module.

RTC

NexRtc

Functions to interact with Nextion RTC

class nextion.nextion_rtc.NexRtc(nh)[source]

Bases: Common

docstring for NexRtc

read_rtc_time(return_type: str, length: None = 22) → None[source]

Read RTC time

Parameters

return_type (str) – The return type, choose “int”, “str” or from [“year”, “mon”, “day”, “hour”, “min”, “sec”, “week”]
length (Optional[int]) – The length

Returns

RTC time

Return type

Union[str, List[int]]

property time_types: None

Get available time types

Returns: Requestable time types from RTC
Return type: List[str]

write_rtc_time(*args, **kwargs) → bool[source]

Write time to RTC

Parameters

time (Union[str, List[int]]) – The time to set the RTC
time_type (str) – The type of time to change

Returns

True on success, False otherwise

Return type

bool

exception nextion.nextion_rtc.NexRtcError[source]

Bases: Exception

Base class for exceptions in this module.

Scrolltext

Slider

NexSlider

Functions to interact with a Nextion Slider element

class nextion.nextion_slider.NexSlider(nh, pid: int, cid: int, name: str)[source]

Bases: Common, CommonBackgroundColorMixin, CommonFontMixin, CommonPointerMixin, CommonValueMixin

docstring for NexSlider

Get_cursor_height_hig() → int[source]

Get cursor hig attribute of component

Returns: The cursor height.
Return type: number

Set_cursor_height_hig(number: int) → bool[source]

Set cursor hig attribute of component

Parameters: number (int) – The number
Returns: True on success, false otherwise
Return type: bool

getMaxval() → int[source]

Get the maxval attribute of the component

Returns: The maxval
Return type: int

getMinval() → int[source]

Get the minval attribute of the component

Returns: The minval
Return type: int

setMaxval(number: int) → bool[source]

Set the maxval attribute of the component

Parameters: number (int) – The new maxval
Returns: True on success, false otherwise
Return type: bool

setMinval(number: int) → bool[source]

Set the minval attribute of the component

Parameters: number (int) – The new minval
Returns: True on success, false otherwise
Return type: bool

exception nextion.nextion_slider.NexSliderError[source]

Bases: Exception

Base class for exceptions in this module.

Text

NexText

Functions to interact with a Nextion Text element

class nextion.nextion_text.NexText(nh, pid: int, cid: int, name: str)[source]

Bases: Common, CommonBackgroundColorMixin, CommonFontMixin, CommonPositionMixin, CommonTextMixin

docstring for NexText

exception nextion.nextion_text.NexTextError[source]

Bases: Exception

Base class for exceptions in this module.

Upload

NexUpload

Functions to download TFT file to Nextion display

class nextion.nextion_upload.NexUpload(nh, file_name: str, download_baudrate: int)[source]

Bases: Common

docstring for NexUpload

_checkFile() → bool[source]

Check existance of specified TFT file

Returns: True on success, False otherwise
Return type: bool

_downloadTftFile() → bool[source]

Download TFT file to Nextion display

Returns: True on success, False otherwise
Return type: bool

_exists(path: str) → bool[source]

Check existance of file at given path.

Parameters: path (str) – The path to the file
Returns: Existance of file
Return type: bool

_getBaudrate() → int[source]

Get communication baudrate with Nextion display

Returns: The baudrate
Return type: int

_recvRetString(timeout: int = 100) → bytearray[source]

Receive a string

Parameters: timeout (int) – The communication timeout
Returns: Received response
Return type: bytearray

_searchBaudrate(baudrate: int) → bool[source]

Find suitable download baudrate

Parameters: baudrate (int) – The baudrate
Returns: True on success, False otherwise
Return type: bool

_setDownloadBaudrate(baudrate: int) → bool[source]

Set the download baudrate

Parameters: baudrate (int) – The baudrate
Returns: True on success, False otherwise
Return type: bool

property download_baudrate: int

Get the download baudrate

Returns: Download baudrate for communication with Nextion display
Return type: int

property file_name: str

Get the update filename

Returns: Filename of update file
Return type: str

property file_size: int

Get the update filesize

Returns: Filesize of update file in bytes
Return type: int

upload() → bool[source]

Perform update of Nextion display content

Returns: True on success, raise NexUploadError otherwise
Return type: bool

exception nextion.nextion_upload.NexUploadError[source]

Bases: Exception

Base class for exceptions in this module.

Variable

NexVariable

Functions to interact with a Nextion Variable element

class nextion.nextion_variable.NexVariable(nh, pid: int, cid: int, name: str)[source]

Bases: Common, CommonTextMixin, CommonValueMixin

docstring for NexVariable

exception nextion.nextion_variable.NexVariableError[source]

Bases: Exception

Base class for exceptions in this module.

Waveform

NexWaveform

Functions to interact with a Nextion Waveform element

class nextion.nextion_waveform.NexWaveform(nh, pid: int, cid: int, name: str)[source]

Bases: Common, CommonBackgroundColorMixin, CommonFontMixin

docstring for NexWaveform

Get_channel_0_color_pco0() → int[source]

Get channel0 pco0 attribute of component

Returns: The channel0 pco0
Return type: int

Get_grid_color_gdc() → int[source]

Get grid color attribute of component

Returns: The grid color
Return type: int

Get_grid_height_gdh() → int[source]

Get grid height attribute of component

Returns: The grid height
Return type: int

Get_grid_width_gdw() → int[source]

Get grid width attribute of component

Returns: The grid width
Return type: int

Set_channel_0_color_pco0(number: int) → int[source]

Set channel0 pco0 attribute of component

Parameters: number (int) – The channel0 pco0
Returns: True on success, false otherwise
Return type: bool

Set_grid_color_gdc(number: int) → bool[source]

Set grid color attribute of component

Parameters: number (int) – The grid color number
Returns: True on success, false otherwise
Return type: bool

Set_grid_height_gdh(number: int) → bool[source]

Set grid height attribute of component

Parameters: number (int) – The grid height
Returns: True on success, false otherwise
Return type: bool

Set_grid_width_gdw(number: int) → bool[source]

Set grid width attribute of component

Parameters: number (int) – The grid width
Returns: True on success, false otherwise
Return type: bool

addValue(ch: int, number: int) → bool[source]

Add value to waveform

Parameters

ch (int) – Channel of waveform (0-3)
number (int) – The value to add

Returns

True on success, false otherwise

Return type

bool

clearChannel(ch: int) → bool[source]

Clear a channel of the waveform

Parameters: ch (int) – The channel to clear or 255 for all channels
Returns: True on success, false otherwise
Return type: bool

exception nextion.nextion_waveform.NexWaveformError[source]

Bases: Exception

Base class for exceptions in this module.