Expressions

Templates resolve data with {moduleId:property} expressions and pipe the result through transforms for formatting and arithmetic. Transforms compose left to right:

{wx:temperature | round:0 | c2f}    → "73"
{dt:hour | towords | uppercase}     → "FOURTEEN"
{sys:battery | gte:80}              → "true"

Pipe transforms (28)

Name	Syntax	Description	Example	Argument
`add`	`value \| add:addend`	Add a number to the value	`10 → 15 (with add:5)`	addend — number to add
`c2f`	`value \| c2f`	Convert Celsius to Fahrenheit	`0 → 32`	—
`c2k`	`value \| c2k`	Convert Celsius to Kelvin	`0 → 273.2`	—
`capitalize`	`value \| capitalize`	Capitalize the first character	`hello → Hello`	—
`ceil`	`value \| ceil`	Round up to the nearest integer	`3.1 → 4`	—
`clamp`	`value \| clamp:min:max`	Constrain value to a min/max range	`150 → 100 (with clamp:0:100)`	min:max — lower and upper bounds
`f2c`	`value \| f2c`	Convert Fahrenheit to Celsius	`76 → 24.4`	—
`f2k`	`value \| f2k`	Convert Fahrenheit to Kelvin	`32 → 273.2`	—
`floor`	`value \| floor`	Round down to the nearest integer	`3.9 → 3`	—
`gte`	`value \| gte:threshold`	Check if value is greater than or equal to threshold	`85 → true (with gte:80)`	threshold — comparison value
`k2c`	`value \| k2c`	Convert Kelvin to Celsius	`273.15 → 0`	—
`k2f`	`value \| k2f`	Convert Kelvin to Fahrenheit	`273.15 → 32`	—
`lowercase`	`value \| lowercase`	Convert text to lowercase	`AM → am`	—
`lte`	`value \| lte:threshold`	Check if value is less than or equal to threshold	`70 → true (with lte:80)`	threshold — comparison value
`multiply`	`value \| multiply:factor`	Multiply by a factor	`10 → 20 (with multiply:2)`	factor — number to multiply by
`ordinal`	`value \| ordinal`	Convert a number to ordinal form	`3 → 3rd`	—
`padend`	`value \| padend:N`	Pad from the end with zeros	`5 → 50`	N = target length (default 2)
`padstart`	`value \| padstart:N`	Pad from the start with zeros	`5 → 05`	N = target length (default 2)
`replace`	`value \| replace:old:new`	Replace occurrences of a substring	`hello → heLLo (with replace:l:L)`	old:new — string to find and replacement
`round`	`value \| round:N`	Round to a number of decimal places	`3.456 → 3.5 (with round:1)`	N = decimal places (default 0)
`scale`	`value \| scale:inMin:inMax:outMin:outMax`	Linear interpolation between input and output ranges	`50 → 0.5 (with scale:0:100:0:1)`	inMin:inMax:outMin:outMax — source and target ranges
`substr`	`value \| substr:start:end`	Extract a substring by index range	`hello → el (with substr:1:3)`	start:end — zero-based indices
`ternary`	`value \| ternary:trueVal:falseVal`	Conditional output based on true/false value	`true → yes (with ternary:yes:no)`	trueVal:falseVal — output for true and false
`tocelsius`	`value \| tocelsius:UNIT`	Convert any temperature to Celsius	`76 → 24.4 (with tocelsius:F)`	UNIT — source unit: C, F, or K
`tofahrenheit`	`value \| tofahrenheit:UNIT`	Convert any temperature to Fahrenheit	`0 → 32 (with tofahrenheit:C)`	UNIT — source unit: C, F, or K
`tokelvin`	`value \| tokelvin:UNIT`	Convert any temperature to Kelvin	`32 → 273.2 (with tokelvin:F)`	UNIT — source unit: C, F, or K
`towords`	`value \| towords`	Convert a number to English words	`14 → fourteen`	—
`uppercase`	`value \| uppercase`	Convert text to UPPERCASE	`am → AM`	—