fix: Failed to apply calibration to ... when using an empty string (#8088)

Author: Koenkk

src/index.ts

@@ -304,7 +304,7 @@ export function postProcessConvertedFromZigbeeMessage(definition: Definition, pa
     for (const [key, value] of Object.entries(payload)) {
         const definitionExposes = Array.isArray(definition.exposes) ? definition.exposes : definition.exposes(null, null);
         const expose = definitionExposes.find((e) => e.property === key);
-        if (expose?.name in utils.calibrateAndPrecisionRoundOptionsDefaultPrecision && utils.isNumber(value)) {
+        if (expose?.name in utils.calibrateAndPrecisionRoundOptionsDefaultPrecision && value !== '' && utils.isNumber(value)) {
             try {
                 payload[key] = utils.calibrateAndPrecisionRoundOptions(value, options, expose.name);
             } catch (error) {