HASPmota ~

Tasmota is happy to support openHASP compatible format (named HASPmota), which allows to describe rich graphics interfaces using simple JSON templates. HASPmota support leverages the power of LVGL and the Berry language, but doesn't need to code nor learn the LVGL API.

This feature is heavily inspired from @fvanroie's openHASP project.

Minimal requirements~

Hardware: HASPmota is supported on all ESP32 variants, and requires a display configured with universal display (using display.ini or autoconf). When they are correctly configured, you should see a splash screen at startup.

Currently PSRAM is strongly recommended to run HASPmota.

Firmware: HASPmota is included in tasmota32-lvgl firmwares.

Quick tour~

You can see HASPmota in action in a couple of minutes.

Upload tamota_demo.tapp to your file system. The easy way is to use the following command in Tasmota console:

• UrlFetch https://raw.githubusercontent.com/arendst/Tasmota/development/tasmota/berry/haspmota/haspmota_demo.tapp
• Restart 1 to restart
• Enjoy

You should see the following screen, and click on buttons to switch to the second screen:

Understanding the template~

HASPmota automatically loads the template from a file named pages.jsonl. This file contains JSON Lines, i.e. a single JSON document per line. Each line describes an element on the screen. Elements are grouped into pages.

Page 0 contains objects that are displayed on all screens. They are typically used for headers and menus.

The lines below define the header label (red background) and the clock and wifi widgets.

{"page":0,"comment":"---------- Upper stat line ----------"}

{"id":11,"obj":"label","x":0,"y":0,"w":320,"pad_right":90,"h":22,"bg_color":"#D00000","bg_opa":255,"radius":0,"border_side":0,"text":"Tasmota","text_font":"montserrat-20"}

{"id":15,"obj":"lv_wifi_arcs","x":291,"y":0,"w":29,"h":22,"radius":0,"border_side":0,"bg_color":"#000000","line_color":"#FFFFFF"}
{"id":16,"obj":"lv_clock","x":232,"y":3,"w":55,"h":16,"radius":0,"border_side":0}

The lines below describe the 3 buttons at the bottom, and their respective actions.

{"comment":"---------- Bottom buttons - prev/home/next ----------"}
{"id":101,"obj":"btn","x":20,"y":210,"w":80,"h":25,"action":"prev","bg_color":"#1fa3ec","radius":10,"border_side":1,"text":"\uF053","text_font":"montserrat-20"}
{"id":102,"obj":"btn","x":120,"y":210,"w":80,"h":25,"action":"back","bg_color":"#1fa3ec","radius":10,"border_side":1,"text":"\uF015","text_font":"montserrat-20"}
{"id":103,"obj":"btn","x":220,"y":210,"w":80,"h":25,"action":"next","bg_color":"#1fa3ec","radius":10,"border_side":1,"text":"\uF054","text_font":"montserrat-20"}

Page 1 is the default page, and contains different widgets types: labels and arc. The values are changed at runtime via Tasmota's rule system, see below for details.

{"page":1,"comment":"---------- Page 1 ----------"}
{"id":0,"bg_color":"#0000A0","bg_grad_color":"#000000","bg_grad_dir":1,"text_color":"#FFFFFF"}

{"id":2,"obj":"arc","x":20,"y":65,"w":80,"h":100,"border_side":0,"type":0,"rotation":0,"start_angle":180,"end_angle":0,"start_angle1":180,"value_font":12,"value_ofs_x":0,"value_ofs_y":-14,"bg_opa":0,"text":"--.-°C","min":200,"max":800,"val":0,"val_rule":"ESP32#Temperature","val_rule_formula":"val * 10","text_rule":"ESP32#Temperature","text_rule_format":"%2.1f °C"}

{"id":5,"obj":"label","x":2,"y":35,"w":120,"text":"Temperature","align":1}

{"id":10,"obj":"label","x":172,"y":35,"w":140,"text":"MPU","align":0}
{"id":11,"obj":"label","x":172,"y":55,"w":140,"text":"x=","align":0,"text_rule":"MPU9250#AX","text_rule_format":"x=%6.3f","text_rule_formula":"val / 1000"}
{"id":12,"obj":"label","x":172,"y":75,"w":140,"text":"y=","align":0,"text_rule":"MPU9250#AY","text_rule_format":"y=%6.3f","text_rule_formula":"val / 1000"}
{"id":13,"obj":"label","x":172,"y":95,"w":140,"text":"z=","align":0,"text_rule":"MPU9250#AZ","text_rule_format":"z=%6.3f","text_rule_formula":"val / 1000"}

Page 2 contains custom widgets as Berry code. These widgets are imported within haspmota_widgets.tapp

{"page":2,"comment":"---------- Page 2 ----------"}
{"id":0,"bg_color":"#0000A0","bg_grad_color":"#000000","bg_grad_dir":1,"text_color":"#FFFFFF"}

{"comment":"---------- Wifi status ----------"}
{"id":20,"obj":"lv_wifi_graph","x":257,"y":25,"w":60,"h":40,"radius":0}
{"id":21,"obj":"lv_tasmota_info","x":3,"y":25,"w":251,"h":40,"radius":0}
{"id":22,"obj":"lv_tasmota_log","x":3,"y":68,"w":314,"h":90,"radius":0,"text_font":12}

Finally, the following line allows to run arbitrary Berry code.

{"comment":"--- Trigger sensors every 2 seconds ---","berry_run":"tasmota.add_cron('*/2 * * * * *', def () tasmota.publish_rule(tasmota.read_sensors()) end, 'oh_every_5_s')"}

The code trigger a read of sensors every 2 seconds and publish the JSON result to be parsed by the rule engine.

tasmota.add_cron('*/2 * * * * *', def () tasmota.publish_rule(tasmota.read_sensors()) end, 'oh_every_5_s')

Running HASPmota~

HASPmota code is included in tasmota32-lvgl firmwares.

Running HASPmota with your own template is as simple as:

• create a template in pages.jsonl and store it in the Tasmota file system
• create an autoexec.be file containing the following:

# simple `autoexec.be` to run HASPmota using the default `pages.jsonl`
import haspmota
haspmota.start()

HASPmota reference~

Integration to Berry~

objects as p<x>b<y>~

Each HASPmota widget is mapped to a global variable of name p<x>b<y>. Example: p1b10. Such objects can be directly used via their attributes.

Example:

p1b10.x += 10
p1b10.text = "Hello"
print(p1b10.w)

pages as p<x>~

Pages objects are mapped to a global variable of name p<x>.

Changing pages can be done with p2.show()

additional parsing~

HASPmota parses all lines from the file pages.jsonl. You can dynamically add new objects as JSON with haspmota.parse(<json>). This functions takes a single json line. It is highly recommended to specify the page id in the json, otherwise the object is added to the current page.

Pages~

Pages object are identified by object if 0. Example:

{"page":1,"id":0,"bg_color":"#0000A0","bg_grad_color":"#000000","bg_grad_dir":1,"text_color":"#FFFFFF"}

Internally HASPmota pages are implemented with LVGL screens, i.e. a parent object.

Page 0 is a special page that is displays over every screens. It is the perfect place to put navigation menus. It is implement as lv.layer_top().

Page 1 is always present and the default page.

Classes of widgets~

Attribute "obj" can take the following values:

You can also import custom widget as long as they inherit from lv.obj and the class name matches the module name.

Example: "obj":"lv_wifi_graph" will trigger the following: - import lv_wifi_graph - instantiation of lv_wifi_graph(parent) object - if successful, it can be used like a typical HASPmota object

Attributes~

Below are the standard attributes:

Attributes related to text content~

Attributes related to values~

Attributes specific to switch~

Attributes specific to arc~

Attributes specific to img~

Attributes specific to roller~

Attributes specific to spinner~

Attributes specific to qrcode~

Tasmota extensions~

Update sensor value via rules~

You can automatically adjust attributes val and text from sensor values via a simple rule engine.

Changing a text attribute from rules:

React to user actions~

Every time the user touches an active element on the screen, HASPmota publishes internal events you can listen and react to. For example if you press a button p1b10, HASPmota publishes an event {"hasp":{"p1b10":{"event":"up"}} when the button is released. You can easily create a rule to react to this event.

Example:

tasmota.add_rule("hasp#p1b10#event=up", / -> print("Button p1b10 pressed"))

Events with value changed indicate that the value of the widgets has changed. Events are only fired if the change in value comes from a screen interaction. No event is fired when the value was changed programmatically. The new value is sent as val attribute, and for specific widgets (roller) a text attribute is sent for the label of the value. {"hasp":{"p1b1":{"val":3,"text":"A3","event":"changed"}}}

Example:

tasmota.add_rule("hasp#p1b1#text", / text-> print("p1b1 text value=", text))

Run arbitrary Berry code~

Inserting an attribute berry_run to any object will compile and run the embedded Berry code right after widget initialization. If you need the current widget object, it requires a special construct like: "berry_run":"return def (x) print(x) end"

One common use is to trigger sensors read every 2 seconds:

{"comment":"--- Trigger sensors every 2 seconds ---","berry_run":"tasmota.add_cron('*/2 * * * * *', def () tasmota.publish_rule(tasmota.read_sensors()) end, 'oh_every_5_s')"}

HASPmota fonts~

HASPmota can use 3 types of LVGL fonts:

• embedded fonts, i.e. fonts included in Tasmota firmware
• binary bitmat fonts (extension .lvfont), stored in the Tasmota file-system using lv_font_conv tool. Tasmota includes various fonts pre-converted
• TrueType fonts (extension .ttf), stored in the Tasmota file-system. TrueType vector fonts can be scaled at any size and render well at high font-sizes, but require significant PSRAM memory

Embedded fonts~

Use attribute "text_font":"unscii-8". The general form is "text_font":"<font_name>-<font_size>"

Binary bitmap fonts~

Files of extension .lvfont, they are similar to embedded fonts but can be loaded dynamically from the file-system.

Generally speaking, binary bitmap fonts are mostly used for low resolution font, or they take too much memory. For larger font, prefer TrueType fonts (see below).

Pixel-perfect fonts~

Pixel-perfect fonts don't use dithering and are specially designed for low resolution monochrome displays.

example:

Same image zoomed x2

unscii-8 (bottom font) is embedded by default.

To use the other fonts, add the corresponding file to the Tasmota file system.

Fonts below are from KreativeKorp

• Berkelium64.lvfont Berkelium (BSW) GEOS System Font
• PrintChar21.lvfont The Ultimate Apple II Font
• Shaston320.lvfont Shaston GS/OS System Font

Fonts below are from Daniel Linssen

• m5x7.lvfont https://managore.itch.io/m5x7
• m3x6.lvfont https://managore.itch.io/m3x6

Here is the HASPmota template for the screen above:

{"page":0,"comment":"---------- Upper stat line ----------"}
{"id":0,"text_color":"#FFFFFF"}
{"id":11,"obj":"label","x":0,"y":0,"w":320,"pad_right":90,"h":22,"bg_color":"#D00000","bg_opa":255,"radius":0,"border_side":0,"text":"Tasmota","text_font":"montserrat-20"}

{"id":15,"obj":"lv_wifi_arcs","x":291,"y":0,"w":29,"h":22,"radius":0,"border_side":0,"bg_color":"#000000","line_color":"#FFFFFF"}
{"id":16,"obj":"lv_clock","x":232,"y":3,"w":55,"h":16,"radius":0,"border_side":0}

{"page":1,"comment":"---------- Page 1 ----------"}
{"id":5,"obj":"label","x":2,"y":30,"w":316,"text":"Berkelium 74192.168.x.x ABCDEF\nThe quick brown fox jumps over the lazy dog","text_font":"A:Berkelium64.lvfont"}
{"id":6,"obj":"label","x":2,"y":55,"w":316,"text":"PrintChar21 192.168.x.x ABCDEF\nThe quick brown fox jumps over the lazy dog","text_font":"A:PrintChar21.lvfont"}
{"id":7,"obj":"label","x":2,"y":80,"w":316,"text":"Shaston320 192.168.x.x ABCDEF\nThe quick brown fox jumps over the lazy dog","text_font":"A:Shaston320.lvfont"}
{"id":8,"obj":"label","x":2,"y":105,"w":316,"text":"m5x7 192.168.x.x ABCDEF\nThe quick brown fox jumps over the lazy dog","text_font":"A:m5x7.lvfont"}
{"id":9,"obj":"label","x":2,"y":130,"w":316,"text":"m3x6 192.168.x.x ABCDEF\nThe quick brown fox jumps over the lazy dog","text_font":"A:m3x6.lvfont"}

{"id":99,"obj":"label","x":2,"y":170,"w":316,"text":"unscii-8 192.168.x.x ABCDEF\nThe quick brown fox jumps over the lazy dog","text_font":"unscii-8"}

TrueType fonts~

Add support for TTF fonts in HASPmota. The attributes needs to specify the font name and the size "text_font":"sketchbook.ttf-32"

Example:

Related pages.jsonl file:

{"page":0,"comment":"---------- Upper stat line ----------"}
{"id":0,"text_color":"#FFFFFF"}
{"id":11,"obj":"label","x":0,"y":0,"w":320,"pad_right":90,"h":22,"bg_color":"#D00000","bg_opa":255,"radius":0,"border_side":0,"text":"Tasmota","text_font":"montserrat-20"}

{"id":15,"obj":"lv_wifi_arcs","x":291,"y":0,"w":29,"h":22,"radius":0,"border_side":0,"bg_color":"#000000","line_color":"#FFFFFF"}
{"id":16,"obj":"lv_clock","x":232,"y":3,"w":55,"h":16,"radius":0,"border_side":0}

{"page":1,"comment":"---------- Page 1 ----------"}
{"id":1,"obj":"label","x":2,"y":40,"w":316,"text":"sketchbook-32\n192.168.x.x ABCDEF\nThe quick brown fox jumps over the lazy dog","text_font":"sketchbook.ttf-32"}