feature: add relay control to hardwareInterface

doc/installation_on_windows.md

@@ -0,0 +1,8 @@
+# Installation on Windows10
+
+## Driver for the USB-to-Serial brigde
+
+For the USB-to-Serial bridge, which is sold as CP2102, the Windows 10 tries to install the driver when plugged-in. But
+the device did not work together with the driver which windows found automatically. A root cause may be, that the
+device is not an original CP2102, but a clone. Finally found a driver on https://www.pololu.com/docs/0J7/all, which works.
+

doc/todo.md

@@ -1,6 +1,6 @@
 # Todos
 
-- [ ] Decode CableCheckRes."DC_EVSEStatus.EVSEStatusCode": dinDC_EVSEStatusCodeType as readable text
+- [x] Decode CableCheckRes."DC_EVSEStatus.EVSEStatusCode": dinDC_EVSEStatusCodeType as readable text
 - [ ] Decode CableCheckRes."DC_EVSEStatus.EVSEIsolationStatus": dinisolationLevelType as readable text
 - [ ] Encoder: PreChargeReq: is it possible to enable the units for EVTargetVoltage and EVTargetCurrent?
 - [ ] Find out, why Alpi reports CableCheckRes = Finished FAILED in v0.4

hardwareInterface.py

@@ -49,6 +49,14 @@ class hardwareInterface():
     def setPowerRelayOff(self):
         self.addToTrace("Switching PowerRelay OFF.")
         self.outvalue &= ~2
+
+    def setRelay2On(self):
+        self.addToTrace("Switching PowerRelay ON.")
+        self.outvalue |= 4
+
+    def setRelay2Off(self):
+        self.addToTrace("Switching PowerRelay OFF.")
+        self.outvalue &= ~4
         
     def getInletVoltage(self):
         #todo: get real measured voltage from the inlet
@@ -122,16 +130,22 @@ def myPrintfunction(s):
 if __name__ == "__main__":
     print("Testing hardwareInterface...")
     hw = hardwareInterface(myPrintfunction)
-    for i in range(0, 300):
+    for i in range(0, 350):
         hw.mainfunction()
-        if (i==100):
+        if (i==50):
             hw.setStateC()
+        if (i==100):
+            hw.setStateB()
+        if (i==150):
+            hw.setStateC()
+            hw.setPowerRelayOn()
         if (i==200):
             hw.setStateB()
+            hw.setPowerRelayOff()
         if (i==250):
-            hw.setStateC()
+            hw.setRelay2On()
-        if (i==280):
+        if (i==300):
-            hw.setStateB()
+            hw.setRelay2Off()
         sleep(0.03)
     hw.close()    
     print("finished.")