feat: watt decimals can be configured via w_decimals option (ulic75#52)

* feat: watt decimals can be configured via `w_decimals` option closes ulic75#45 * update readme
dbartokthomas · May 18, 2022 · c15a375 · c15a375
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diff --git a/README.md b/README.md
@@ -58,6 +58,7 @@ I recommend looking at the [Example usage section](#example-usage) to understand
 | dashboard_link    | `string` |              | Shows a link to an Energy Dashboard. Should be a url path to location of your choice. If you wanted to link to the built-in dashboard you would enter `/energy` for example. |
 | inverted_entities | `string` |              | Comma seperated list of entities that should be inverted (negative for consumption and positive for production). See [example usage](#inverted-entities-example).            |
 | kw_decimals       | `number` |      1       | Number of decimals rounded to when kilowatts are displayed.                                                                                                                  |
+| w_decimals        | `number` |      1       | Number of decimals rounded to when watts are displayed.                                                                                                                      |
 | min_flow_rate     | `number` |     .75      | Represents the fastest amount of time in seconds for a flow dot to travel from one end to the other, see [flow formula](#flow-formula).                                      |
 | max_flow_rate     | `number` |      6       | Represents the slowest amount of time in seconds for a flow dot to travel from one end to the other, see [flow formula](#flow-formula).                                      |
 | watt_threshold    | `number` |      0       | The number of watts to display before converting to and displaying kilowatts. Setting of 0 will always display in kilowatts.                                                 |

diff --git a/src/power-flow-card-config.ts b/src/power-flow-card-config.ts
@@ -22,5 +22,6 @@ export interface PowerFlowCardConfig extends LovelaceCardConfig {
   kw_decimals: number;
   min_flow_rate: number;
   max_flow_rate: number;
+  w_decimals: number;
   watt_threshold: number;
 }
diff --git a/src/power-flow-card.ts b/src/power-flow-card.ts
@@ -25,6 +25,7 @@ const CIRCLE_CIRCUMFERENCE = 238.76104;
 const KW_DECIMALS = 1;
 const MAX_FLOW_RATE = 6;
 const MIN_FLOW_RATE = 0.75;
+const W_DECIMALS = 1;
 
 @customElement("power-flow-card")
 export class PowerFlowCard extends LitElement {
@@ -44,6 +45,7 @@ export class PowerFlowCard extends LitElement {
       kw_decimals: coerceNumber(config.kw_decimals, KW_DECIMALS),
       min_flow_rate: coerceNumber(config.min_flow_rate, MIN_FLOW_RATE),
       max_flow_rate: coerceNumber(config.max_flow_rate, MAX_FLOW_RATE),
+      w_decimals: coerceNumber(config.w_decimals, W_DECIMALS),
       watt_threshold: coerceNumber(config.watt_threshold),
     };
   }
@@ -79,7 +81,7 @@ export class PowerFlowCard extends LitElement {
   private displayValue = (value: number) =>
     value >= this._config!.watt_threshold
       ? `${round(value / 1000, this._config!.kw_decimals)} kW`
-      : `${round(value, 1)} W`;
+      : `${round(value, this._config!.w_decimals)} W`;
 
   protected render(): TemplateResult {
     if (!this._config || !this.hass) {