add crc and checksum in default protocol

COMTool/plugins/crc.py

@@ -56,12 +56,13 @@
     0x43, 0x83, 0x41, 0x81, 0x80, 0x40
 ]
 
-def crc16(array):
+def crc16(array, crc=0x0000):
     '''
-        crc16 IBM
+        crc16 IBM if crc is 0x0000
+        crc16 MODBUS if crc is 0xffff
     '''
-    crchi = 0x00
-    crclo = 0x00
+    crchi = crc >> 8
+    crclo = crc & 0xff
     for i in range(0, len(array)):
         crcindex = crchi ^ array[i]
         crchi = crclo ^ auchCRCHi[crcindex]

COMTool/plugins/protocols.py

@@ -7,15 +7,36 @@
 protocols_dir = os.path.join(parameters.dataPath, "protocols")
 
 default = '''
-def decode(data):
+def decode(data:bytes) -> bytes:
     return data
 
-def encode(data):
+def encode(data:bytes) -> bytes:
     return data
 '''
 
+add_crc16 = '''
+
+def decode(data:bytes) -> bytes:
+    return data
+
+def encode(data:bytes) -> bytes:
+    crc_bytes = pack("<H", crc.crc16(data))
+    return data + crc_bytes
+'''
+
+add_sum = '''
+def decode(data:bytes) -> bytes:
+    return data
+
+def encode(data:bytes) -> bytes:
+    return data + bytes([sum(a) % 256])
+'''
+
+
 defaultProtocols = {
     "default": default,
+    "add_crc16": add_crc16,
+    "add_sum": add_sum,
 }
 ignoreList = ["maix-smart"]