From 20a227cc53ca36307c9b9e8d1da3f49d3714b127 Mon Sep 17 00:00:00 2001
From: Eggert Jung <eggert.s.jung@wischhof13.de>
Date: Thu, 21 Mar 2024 08:32:08 +0100
Subject: [PATCH] initial commit

---
 peaktech.py | 125 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 peaktech.py

diff --git a/peaktech.py b/peaktech.py
new file mode 100644
index 0000000..3294c67
--- /dev/null
+++ b/peaktech.py
@@ -0,0 +1,125 @@
+from serial import Serial
+from math import inf
+import sys
+import binascii
+
+def crap_to_number(crap):
+    number_str = ""
+    for elem in crap:
+        switch={
+                0xcf:"9",
+                0xef:"8",
+                0x8a:"7",
+                0xe7:"6",
+                0xc7:"5",
+                0x4e:"4",
+                0x8f:"3",
+                0xad:"2",
+                0x0a:"1",
+                0xeb:"0"
+                }
+        number_str+=switch.get(elem, "-")
+    print(number_str)
+
+
+def read_peaktech( port ):
+    try:
+        with Serial( port , 2400) as ser:
+            print(ser.name)
+            while True:
+                line = ser.read_until( b'\xf1' )
+                #print(binascii.hexlify(line))
+
+                good=1
+                if(len(line) == 15):
+                    for i in range(0, 0xf):
+                        if i+1 != ((line[i]&0xF0)>>4):
+                            good=0
+                else:
+                    good=0
+
+                bytearr = bytearray(line)
+
+                if(good==1):
+                    for i in range(0, 0xf):
+                        bytearr[i] = (bytearr[i] & 0x0F)
+                    print(binascii.hexlify(bytearr))
+
+                    num1 = (bytearr[1]<<4) | bytearr[2]
+                    num2 = (bytearr[3]<<4) | bytearr[4]
+                    num3 = (bytearr[5]<<4) | bytearr[6]
+                    num4 = (bytearr[7]<<4) | bytearr[8]
+
+                    crap_to_number([num1, num2, num3, num4])
+
+                    if line[0:2] == b'\x1C\x20':
+                        print("Ohm")
+                    if line[0:2] == b'\x18\x20':
+                        print("beep")
+                    if line[0:1] == b'\x1e':
+                        print("V DC")
+                    if line[0:1] == b'\x1d':
+                        print("V AC")
+                    if line[0:2] == b'\x1c\x2e':
+                        print("Hz")
+                    if line[0:2] == b'\x18\x2e':
+                        print("Temp")
+
+                #if (len(line) == 14) and (line[5] == 0x20):
+                #    try:
+                #        value = float( line[0:5].decode("ascii") )
+
+                #        if line[6] == 0x31:
+                #            value /= 10
+                #        elif line[6] == 0x32:
+                #            value /= 100
+                #        elif line[6] == 0x33:
+                #            value /= 1000
+                #        elif line[6] == 0x34:
+                #            value /= 10000
+                #    except:
+                #        value = inf
+
+                #    if (line[9] & 0x80) != 0:
+                #        prefix = "µ"
+                #    elif (line[9] & 0x40) != 0:
+                #        prefix = "m"
+                #    elif (line[9] & 0x20) != 0:
+                #        prefix = "k"
+                #    elif (line[9] & 0x20) != 0:
+                #        prefix = "M"
+                #    else:
+                #        prefix = ""
+
+                #    if (line[10] & 0x80) != 0:
+                #        unit = "V"
+                #    elif (line[10] & 0x40) != 0:
+                #        unit = "A"
+                #    elif (line[10] & 0x20) != 0:
+                #        unit = "Ω"
+                #    elif (line[10] & 0x10) != 0:
+                #        unit = "hFE"
+                #    elif (line[10] & 0x08) != 0:
+                #        unit = "Hz"
+                #    elif (line[10] & 0x04) != 0:
+                #        unit = "F"
+                #    elif (line[10] & 0x02) != 0:
+                #        unit = "℃"
+                #    elif (line[10] & 0x01) != 0:
+                #        unit = "℉"
+                #    else:
+                #        unit = ""
+
+                #    print( f"{value}{prefix}{unit}" )
+    except KeyboardInterrupt:
+        pass
+    except Exception as ex:
+        print( "Exception:", ex )
+
+if __name__  == "__main__":
+    port = "/dev/ttyUSB0"
+
+    if len(sys.argv) > 1:
+        port = sys.argv[1]
+
+    read_peaktech( port )