├── Protocol.odt ├── README.md ├── LogData.py ├── multimeter.py └── LICENSE /Protocol.odt: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/riktw/AN9002_info/HEAD/Protocol.odt -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # AN9002_info 2 | Info and a logging script for the AN9002 multimeter 3 | 4 | This has just been tested on 1 multimeter. You might need to change the address in the python scripts. 5 | 6 | ## Usage 7 | 8 | To run, the keyboard and bleak libraries need to be installed using: 9 | 10 | 11 | pip install keyboard 12 | 13 | pip install bleak 14 | 15 | 16 | This script needs to be run as root on Linux due to the keyboard library. 17 | 18 | Run the script. After a few seconds it should connect and start showing a graph. 19 | Pressing "q" inside the terminal stops the script and stores the data into a csv file. 20 | If the unit of measurement is changed(going from volt to amp for example), the logging starts again. 21 | Roughly 2.6 measurements are taken per second, so one minute of logging equals around 156 measurements. 22 | 23 | 24 | More info can be found on the corresponding [blog post.](https://justanotherelectronicsblog.com/?p=930) 25 | -------------------------------------------------------------------------------- /LogData.py: -------------------------------------------------------------------------------- 1 | import sys 2 | import asyncio 3 | import platform 4 | import logging 5 | import keyboard 6 | import csv 7 | 8 | from multimeter import * 9 | import matplotlib.pyplot as plt 10 | from bleak import BleakClient 11 | 12 | ADDRESS = ( 13 | "FC:58:FA:3C:94:16" 14 | ) 15 | 16 | CHARACTERISTIC_UUID = "0000fff4-0000-1000-8000-00805f9b34fb" # <--- Change to the characteristic you want to enable notifications from. 17 | 18 | dataGraph = [] 19 | multimeter = AN9002() 20 | lastDisplayedUnit = "" 21 | 22 | def notification_handler(sender, data): 23 | global dataGraph 24 | global multimeter 25 | global lastDisplayedUnit 26 | """Simple notification handler which prints the data received.""" 27 | #print("Data multimeter: {0}".format(data.hex(' ') )) 28 | multimeter.SetMeasuredValue(data) 29 | displayedData = multimeter.GetDisplayedValue() 30 | if multimeter.overloadFlag: 31 | displayedData = 99999 32 | print("Overload") 33 | 34 | unit = multimeter.GetDisplayedUnit() 35 | if lastDisplayedUnit == "": 36 | lastDisplayedUnit = unit 37 | 38 | if unit != lastDisplayedUnit: 39 | lastDisplayedUnit = unit 40 | dataGraph.clear() 41 | plt.clf() 42 | 43 | dataGraph.append(displayedData) 44 | plt.ylabel(unit) 45 | print(str(displayedData) + " " + unit) 46 | 47 | 48 | async def run(address): 49 | client = BleakClient(address) 50 | 51 | try: 52 | await client.connect() 53 | await client.start_notify(CHARACTERISTIC_UUID, notification_handler) 54 | 55 | while(1): 56 | if keyboard.is_pressed("q"): 57 | print("Shutting down!"); 58 | break; 59 | else: 60 | plt.plot(dataGraph, color='b') 61 | plt.draw() 62 | plt.pause(0.1) 63 | await asyncio.sleep(0.5) 64 | 65 | except Exception as e: 66 | print(e) 67 | finally: 68 | await client.stop_notify(CHARACTERISTIC_UUID) 69 | await client.disconnect() 70 | 71 | 72 | if __name__ == "__main__": 73 | loop = asyncio.get_event_loop() 74 | loop.set_debug(False) 75 | loop.run_until_complete(run(ADDRESS)) 76 | 77 | with open('plot.csv', 'w') as f: 78 | wr = csv.writer(f) 79 | wr.writerow(dataGraph) 80 | -------------------------------------------------------------------------------- /multimeter.py: -------------------------------------------------------------------------------- 1 | 2 | class AN9002: 3 | OVERLOAD = -2 4 | SEGMENTERROR = -1 5 | 6 | def SetMeasuredValue(self, data): 7 | self.data = data 8 | self.overloadFlag = False 9 | 10 | def GetDisplayedValue(self): 11 | segment0raw = self.__GetRaw7Segment(self.data[3], self.data[4]) 12 | segment07s = self._InvertNeeded7SegmentBits(segment0raw, 0b0100010) 13 | dataToDisplay = self.__Convert7SegmentToDecimal(segment07s) * 1000 14 | 15 | segment1raw = self.__GetRaw7Segment(self.data[4], self.data[5]) 16 | segment17s = self._InvertNeeded7SegmentBits(segment1raw, 0b1010001) 17 | dataToDisplay += self.__Convert7SegmentToDecimal(segment17s) * 100 18 | 19 | segment2raw = self.__GetRaw7Segment(self.data[5], self.data[6]) 20 | segment27s = self._InvertNeeded7SegmentBits(segment2raw, 0b1100010) 21 | dataToDisplay += self.__Convert7SegmentToDecimal(segment27s) * 10 22 | 23 | segment3raw = self.__GetRaw7Segment(self.data[6], self.data[7]) 24 | segment37s = self._InvertNeeded7SegmentBits(segment3raw, 0b0010001) 25 | dataToDisplay += self.__Convert7SegmentToDecimal(segment37s) 26 | 27 | dataToDisplay /= self.__GetDivisionFactor() 28 | if not self.__CheckBit(self.data[3], 4): 29 | dataToDisplay *= -1.0 30 | 31 | return dataToDisplay 32 | 33 | 34 | def GetDisplayedUnit(self): 35 | if self.__CheckBit(self.data[3], 3): 36 | return "V (diode tester)" 37 | 38 | if not self.__CheckBit(self.data[7], 5): 39 | return "F" 40 | elif not self.__CheckBit(self.data[7], 6): 41 | return "C" 42 | 43 | if self.__CheckBit(self.data[8], 4): 44 | if not self.__CheckBit(self.data[8], 5): 45 | return "mF" 46 | elif not self.__CheckBit(self.data[8], 6): 47 | return "uF" 48 | elif self.__CheckBit(self.data[8], 7): 49 | return "nF" 50 | 51 | if self.__CheckBit(self.data[9], 4): 52 | if not self.__CheckBit(self.data[9], 5): 53 | return "mV" 54 | else: 55 | return "V" 56 | elif not self.__CheckBit(self.data[9], 7): 57 | if not self.__CheckBit(self.data[10], 3): 58 | return "mA" 59 | elif self.__CheckBit(self.data[10], 2): 60 | return "uA" 61 | else: 62 | return "A" 63 | 64 | elif not self.__CheckBit(self.data[9], 1): 65 | if not self.__CheckBit(self.data[9], 3): 66 | return "MΩ" 67 | elif self.__CheckBit(self.data[9], 2): 68 | return "kΩ" 69 | else: 70 | return "Ω" 71 | elif self.__CheckBit(self.data[9], 0): 72 | return "Hz" 73 | 74 | return "?" 75 | 76 | def __CheckBit(self, byte, bitPosition): 77 | return True if byte & (1<> 1) + low) 93 | 94 | def _InvertNeeded7SegmentBits(self, segmentRaw, invertTable): 95 | invertedValue = segmentRaw ^ invertTable 96 | shuffledValue = (invertedValue & 0x40) >> 6 97 | shuffledValue += (invertedValue & 0x20) 98 | shuffledValue += (invertedValue & 0x10) 99 | shuffledValue += (invertedValue & 0x08) >> 2 100 | shuffledValue += (invertedValue & 0x04) << 4 101 | shuffledValue += (invertedValue & 0x02) << 1 102 | shuffledValue += (invertedValue & 0x01) << 3 103 | return shuffledValue 104 | 105 | def __Convert7SegmentToDecimal(self, raw7seg): 106 | if raw7seg == 0x3F: 107 | return 0 108 | elif raw7seg == 0x06: 109 | return 1 110 | elif raw7seg == 0x5B: 111 | return 2 112 | elif raw7seg == 0x4F: 113 | return 3 114 | elif raw7seg == 0x66: 115 | return 4 116 | elif raw7seg == 0x6D: 117 | return 5 118 | elif raw7seg == 0x7D: 119 | return 6 120 | elif raw7seg == 0x07: 121 | return 7 122 | elif raw7seg == 0x7F: 123 | return 8 124 | elif raw7seg == 0x6F: 125 | return 9 126 | elif raw7seg == 0x38: #L from OL, OverLoad 127 | self.overloadFlag = True 128 | return self.OVERLOAD 129 | else: 130 | return self.SEGMENTERROR -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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