Function stubs done.

devices/geiger/geiger.go

@@ -18,7 +18,22 @@ func New(c Config) (Counter, error) {
 
 // Counter is an interface for Geiger Counters
 type Counter interface {
-	GetReading() (*Reading, error)
+	Clear() error
+	Version() (string, error)
+	SerialNum() (string, error)
+	GetCPM() (uint16, error)
+	GetCPS() (uint16, error)
+	GetVoltage() (int16, error)
+	GetHistoryData()
+	TurnOnCPS() error
+	TurnOffCPS() error
+	GetAutoCPS() (uint16, error)
+	TurnOffPower()
+	GetConfiguration()
+	SetConfiguration()
+	ResetConfiguration()
+	SetDate(date string)
+	SetTime(time string)
 }
 
 // Config contain the configuration for a Geiger Counter