Reworked config

dmm_decoder.py

@@ -0,0 +1,78 @@
+# dmm_decoder.py
+
+import json
+
+class DMMDecoder:
+    """Base class for DMM screen/binary decoders."""
+    def __init__(self, config):
+        self.xorkey = self.str2hexarray(config["xorkey"])
+        self.icon_regions = config["icon_regions"]["default"]
+        self.icon_table = config["icon_table"]
+
+    @staticmethod
+    def str2hexarray(string):
+        string = string.replace(' ', '').lower()
+        return [int(string[i:i+2], 16) for i in range(0, len(string), 2)]
+
+    @staticmethod
+    def bytewise_XOR(array, xorkey):
+        return [array[x] ^ xorkey[x % len(xorkey)] for x in range(len(array))]
+
+    @staticmethod
+    def hex2bin(array):
+        return [bin(x)[2:].zfill(8) for x in array]
+
+    @staticmethod
+    def flip_bits(array):
+        return [b[::-1] for b in array]
+
+    @staticmethod
+    def array2str(array):
+        return ''.join(array)
+
+    def extract_icon_bits(self, bitstring):
+        bits = self.icon_regions
+        # Concatenate bit ranges
+        return bitstring[bits[0]:bits[1]] + bitstring[bits[2]:bits[3]]
+
+    def decode_icons(self, icon_bits):
+        return [self.icon_table[i] for i, b in enumerate(icon_bits) if b == '1' and i < len(self.icon_table)]
+
+    def decode_packet(self, hexstring):
+        encoded_array = self.str2hexarray(hexstring)
+        # pad xorkey if needed
+        xorkey = (self.xorkey * ((len(encoded_array) // len(self.xorkey)) + 1))[:len(encoded_array)]
+        xordecoded = self.bytewise_XOR(encoded_array, xorkey)
+        binary = self.hex2bin(xordecoded)
+        flipped = self.flip_bits(binary)
+        bitstring = self.array2str(flipped)
+        icon_bits = self.extract_icon_bits(bitstring)
+        icons = self.decode_icons(icon_bits)
+        return {'icons': icons}
+
+# Example derived decoder for ZT-5B (can be extended for other models)
+class ZT5BDecoder(DMMDecoder):
+    def __init__(self, config):
+        super().__init__(config)
+        # add any ZT-5B-specific setup here if needed
+
+# --- Usage Example ---
+if __name__ == "__main__":
+    # Minimal config example
+    config = {
+        "xorkey": "41217355a2c1327166aa3bd0e2a833142021aabb",
+        "icon_regions": {
+            "default": [24, 28, 60, 87]
+        },
+        "icon_table": [
+            "LowBattery","Delta","BT","BUZ","HOLD","ºF","ºC","DIODE",
+            "MAX","MIN","%","AC","F","u(F)","m(F)","n(F)","Hz",
+            "ohm","K(ohm)","M(ohm)","V","m(V)","DC","A","AUTO",
+            "?7","u(A)","m(A)","?8","?9","?10","?11"
+        ]
+    }
+
+    decoder = ZT5BDecoder(config)
+    hexstring = "1b847195453ad9fa668a"
+    result = decoder.decode_packet(hexstring)
+    print(json.dumps(result, ensure_ascii=False, indent=2))