formatting errors

aht20/aht20.go

@@ -102,10 +102,15 @@ func (d *Dev) Sense(e *physic.Env) error {
 		// read measurement
 		if err := d.d.Tx(nil, data); err != nil {
 			return err
-		} else if d.opts.ValidateData && calculateCRC8(data[0:6]) != data[6] {
-			return &DataCorruptionError{}
 		}
 
+		// validate data
+		dataCrc := calculateCRC8(data[0:6])
+		if d.opts.ValidateData && dataCrc != data[6] {
+			return &DataCorruptionError{Received: data[6], Calculated: dataCrc}
+		}
+
+		// check if measurement is ready
 		if data[0]&bitInitialized == 0 {
 			return &NotInitializedError{}
 		} else if data[0]&bitBusy == 0 {
@@ -122,7 +127,7 @@ func (d *Dev) Sense(e *physic.Env) error {
 		time.Sleep(d.opts.MeasurementWaitInterval) // wait until measurement is ready
 	}
 
-	return &ReadTimeoutError{}
+	return &ReadTimeoutError{Timeout: d.opts.MeasurementReadTimeout}
 }
 
 // SenseContinuous implements physic.SenseEnv. It returns a channel that will

aht20/error.go

@@ -1,5 +1,10 @@
 package aht20
 
+import (
+	"fmt"
+	"time"
+)
+
 // NotInitializedError is returned when the sensor is not initialized but a measurement is requested.
 type NotInitializedError struct{}
 
@@ -8,15 +13,23 @@ func (e *NotInitializedError) Error() string {
 }
 
 // ReadTimeoutError is returned when the sensor does not finish a measurement in time.
-type ReadTimeoutError struct{}
+type ReadTimeoutError struct {
+	// Timeout is the configured timeout.
+	Timeout time.Duration
+}
 
 func (e *ReadTimeoutError) Error() string {
-	return "Read timeout. AHT20 did not finish measurement in time."
+	return fmt.Sprintf("Read timeout after %s. AHT20 did not finish measurement in time.", e.Timeout)
 }
 
 // DataCorruptionError is returned when the data from the sensor does not match the CRC8 hash.
-type DataCorruptionError struct{}
+type DataCorruptionError struct {
+	// Calculated is the calculated CRC8 hash using the received data bytes.
+	Calculated uint8
+	// Received is the CRC8 hash received from the sensor.
+	Received uint8
+}
 
 func (e *DataCorruptionError) Error() string {
-	return "Data is corrupt. The CRC8 hashes did not match."
+	return fmt.Sprintf("Data is corrupt. The CRC8 hashes did not match. Calculated: 0x%X, Received: 0x%X", e.Calculated, e.Received)
 }