You can even have as many format strings as you want in a single printf call. 2 - round the decimal number to 2 digits after the decimal point. The result would be shorter than 7 characters long. Zero digits of accuracy (without a decimal) %.0f.Īnother interesting format string is %7.2f, which would become the right-justified stringħ - means that the number will be right-justified and be padded on the left by spaces if Here it is a f(loat).įor example, if you would like to print a sensor value with two digits of accuracy, you would write %.2f and with 1 - round the decimal number to 1 digits after the decimal point.į - the specifier which tells printf the data type of the argument. You can read more about itīut for ESPHome there are really just a few things you need to know. Until a so-called “specifier” is encountered (in this case f). Stuff after it is encountered, it is magically replaced by the argument after the format (here id(my_sensor).state).Įvery time you type a percent sign % in a printf format string, it will treat the following letters as a format tag lambda : |- it.printf(0, 0, id(my_font), "The sensor value is: %.1f", id(my_sensor).state) // If the sensor has the value 30.02, the result will be: "The sensor value is: 30.0"Īs you can see, when you call printf most of the string is printed as-is, but when this weird percent sign with some !"%()+=,-_.:☀123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz. The items in the list can alsoīe more than one character long if you for example want to use font ligatures. Reduce the size of the binary if you don’t plan to use some glyphs. Adjust this if you need some special characters or want to Glyphs ( Optional, list): A list of characters you plan to use. If you want to use the same font in different sizes, create two font objects. Size ( Optional, int): The size of the font in pt (not pixel!). Id ( Required, ID): The ID with which you will be able to reference the font later yaml file is) of the TrueType or bitmap font file. Path ( Required, string): The path (relative to where the. Italic ( Optional, boolean): Whether the font should be italic. Can be either the text name or the integer value: Weight ( Optional, enum): The weight of the font. Symbols or Icons as in the example above.įamily ( Required, string): The name of the Google Font family. This can also be used to download Material Type ( Required, string): Can be gfonts or local.Įach Google Font will be downloaded once and cached for future use. You can use the gfonts:// short form to use Google Fonts, or use the below structure: įile ( Required): The path (relative to where the. Now that you know a bit more about ESPHome’s coordinate system, let’s draw some basic shapes like lines, rectanglesįont : - file : "fonts/Comic Sans MS.ttf" id : my_font size : 20 # - file : "gfonts://Roboto" id : roboto size : 20 - file : type : gfonts family : Roboto weight : 900 id : font2 size : 16 - file : "fonts/tom-thumb.bdf" id : tomthumb - file : 'gfonts://Material+Symbols+Outlined' id : icon_font_50 size : 50 glyphs : # mdi-timer display : #. The rendering engine is always first specify the x coordinate and then the y coordinate. X always represents the horizontal axis (width) and y the vertical axis (height). Also, all points in this coordinate systemĪre a pair of integers like 50, 50 which represent the shift to the right and shift downwards. The top left is always the origin of the pixel coordinate system. This already highlights one of the things you must learn before diving into writing your own custom display code: Rotation: option to rotate the display to your liking) Line which starts at the top left and goes a few pixels down at a 45° angle. If you compile and upload the configuration above, you should see a black (or white, depending on the display) Otherwise you will be greeted by a long error message at the compilation stage. Lambdas are essentially just a lightly modified version of C++.
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