CAN dump and test script added, small changes in thingset library

Author: martinjaeger

test.py

@@ -0,0 +1,13 @@
+# use test/candump.txt for testing with real CAN data
+#
+
+from thingset.cansocket import CANsocket
+sock = CANsocket('can0')  # or other interface
+
+while(True):
+	frame = sock.receive()
+	if isinstance(frame.cbor, float):
+		print("device: 0x%x  data id: 0x%x   value: %.2f" % (frame.source, frame.dataobjectID, frame.cbor))
+	else:
+		print("device:", hex(frame.source), " data id:", hex(frame.dataobjectID), "  value:", frame.cbor)
+

test/Readme.md

@@ -0,0 +1,40 @@
+# CAN device information
+
+In the final implementation of the protocol, the name of each data ID can be read from the device. For now use the tables below to associate data to measurement value:
+
+Use test.py in root folder to dump data from the CAN bus.
+
+## BMS 
+
+Device ID: 0x00
+
+| Data Object ID | Data Name |
+|--------|------|
+| 0x4001 | vBat |
+| 0x4002 | vLoad |
+| 0x4003 | vCell1 |
+| 0x4004 | vCell2 |
+| 0x4005 | vCell3 |
+| 0x4006 | vCell4 |
+| 0x4007 | vCell5 |
+| 0x4008 | iBat |
+| 0x4009 | tempBat |
+| 0x400A | SOC |
+
+
+## MPPT
+
+Device ID: 0x0A
+| Data Object ID | Data Name |
+|--------|-------|
+| 0x4001 | vBat |
+| 0x4002 | vSolar |
+| 0x4003 | iBat |
+| 0x4004 | iLoad |
+| 0x4005 | tempExt |
+| 0x4006 | tempInt |
+| 0x4007 | loadEn |
+| 0x4008 | eInputDay_Wh |
+| 0x4009 | eOutputDay_Wh |
+| 0x400A | eInputTotal_Wh |
+| 0x400B | eOutputTotal_Wh |