feature: exit if connectionLevel decreases from full. Raspberry docu improved.

connMgr.py

@@ -13,6 +13,9 @@
 #   the lower-layer state machine can stay silent as long as the upper layers are working
 #   fine.
 
+from configmodule import getConfigValue, getConfigValueBool
+import sys # For exit_on_session_end hack
+
 CONNLEVEL_100_APPL_RUNNING = 100
 CONNLEVEL_80_TCP_RUNNING = 80
 CONNLEVEL_50_SDP_DONE = 50
@@ -98,6 +101,14 @@ class connMgr():
                                     self.ConnectionLevel=0
         if (self.ConnectionLevelOld!=self.ConnectionLevel):
             self.addToTrace("[CONNMGR] ConnectionLevel changed from " + str(self.ConnectionLevelOld) + " to " + str(self.ConnectionLevel))
+            if ((self.ConnectionLevelOld==100) and (self.ConnectionLevel<100)):
+                # We had a charging session, and now it is gone.
+                # Depending on configuration option, we may end the script here.
+                if getConfigValueBool("exit_on_session_end"):
+                    # TODO: This is a hack. Do this in fsmPev instead?
+                    self.addToTrace("[CONNMGR] Terminating the application.")
+                    sys.exit(0)
+
             self.ConnectionLevelOld = self.ConnectionLevel
         if ((self.cycles % 33)==0):
             # once per second

doc/installation_on_raspberry.md

@@ -83,6 +83,15 @@ Try-out the cooperation of Python with the EXI encoder/decoder:
 ```
 This should run some decoder/encoder tests and report in the end "Number of fails: 0".
 
+Copy the pyPlc.ini.template into the same directory where pyPlc.py is, and rename it to pyPlc.ini. Edit the settings in this file as you need.
+
+Make some files executable:
+```
+    chmod 744 c55*
+    chmod 744 pevNoGui.py
+    chmod 744 starter.sh
+```
+
 As first test, use the simulation mode (no need for modems or other hardware).
 Start the EVSE in simulation mode `sudo python pyPlc.py E S`.
 Open a second console window, and start here the pev in simulation mode
@@ -111,8 +120,8 @@ In this file, we write the following, to configure the new service:
 
 	[Service]
 	Type=simple
-	ExecStart=/home/pi/myprogs/pyPlc/starter.sh
-	Restart=on-abort
+	ExecStart=/home/pi/myprogs/pyPLC/starter.sh
+	Restart=always
 
 	[Install]
 	WantedBy=multi-user.target

doc/pyPlc.ini.template

@@ -66,8 +66,11 @@ u_delta_max_for_end_of_precharge = 10
 # The serial port and baud rate used for communication. Used
 # for serial devices like Dieter, OLED-Display and
 # celeron55's measuring and switching device
-serial_port = /dev/ttyS1
-serial_baud = 115200
+# Examples:
+#   /dev/ttyS1
+#   auto
+serial_port = auto
+serial_baud = 19200
 
 # The target voltage used in the CurrentDemandRequest.
 # This is a value for first try-outs. Better would

starter.sh

@@ -29,13 +29,15 @@ set -euv
 
 # Keep all IPv6 addresses on the interface down event.
 # Todo: flexible interface name.
+# Todo: On raspberry, without NetworkManager, this option does not help. After the down and up (see below), the IPv6 is missing.
 sysctl net.ipv6.conf.eth0.keep_addr_on_down=1
 
 # Shut down and activate the interface.
-# Todo: Why this needed?
-ip link set eth0 down
+# Todo: Why this needed? On raspberry, where the NetworkManager is not runnning, this disturbs, because
+# afterwards the pyPlc does not see the interfaces IPv6 address.
+# ip link set eth0 down
 sleep 1
-ip link set eth0 up
+# ip link set eth0 up
 sleep 1
 
 # show the addresses