#[192, 64, 0, 238], #measure length
#[192, 65, 0, 150], #laser on
#[192, 66, 0, 205], #laser off
#[192, 69, 0, 208], #horn on
#[192, 70, 0, 139], #horn off
#[192, 71, 0, 243], #backlight on
#[192, 72, 0, 177], #backlight off
#[192, 84, 0, 22], #level in mainframe off
#[192, 85, 0, ???],#lock angle on device (first time locked, second call releases the measuring)
#[194, 64, 0, ???],#measure length but with longer received data b'\x00\x044<\x96\x08\x00\x00' 

def findCmd2(self):
    
    with open ('cmds' + str(time.time()), 'w') as f:
        f.write('start finding command structure\n\n')
        #list
        addrList = range(192,256) #startbyte: everything greater greater or equal 192 [C0] works
        cmdList = range(0,256) #command
        cmdData = range(0,1)#range(0,2) #data: found no use so far
        #build command
        for g in addrList:
            for i in cmdList:
                for c in cmdData:
                    checkSumArr = [g, i, 0] #create command used for checksum
                    checkSumBytes = bytes(checkSumArr) #convert decimal command
                    k = crc8(checkSumBytes) #calculate checksum
                    cmdArr = [g,i,c,k] #create full command for device
                    cmd = bytes(cmdArr) #convert decimal command
                    
                    #exclude bad commands
                    #command cause strange beahviour or decive reboot
                    if ((cmdArr == [192, 53, 0, 166]) or
                        (cmdArr == [192, 55, 0, 86]) or
                        (cmdArr == [192, 56, 0, 20]) or
                        (cmdArr == [192, 54, 0, 46]) or
                        (cmdArr == [192, 58, 0, 228]) or
                        (cmdArr == [192, 59, 0, 156]) or
                        (cmdArr == [192, 60, 0, 82]) or
                        (cmdArr == [192, 61, 0, 42]) or
                        (cmdArr == [192, 55, 1, 86]) or
                        (cmdArr == [192, 55, 1, 240]) or
                        (cmdArr == [192, 56, 1, 20]) or
                        (cmdArr == [192, 56, 1, 178]) or
                        (cmdArr == [192, 53, 1, 0]) or
                        (cmdArr == [192, 54, 1, 46]) or
                        (cmdArr == [192, 55, 1, 240]) or                            
                        (cmdArr == [192, 54, 1, 136]) or
                        (cmdArr == [192, 58, 1, 228]) or
                        (cmdArr == [192, 59, 1, 156]) or
                        (cmdArr == [192, 60, 1, 82]) or
                        (cmdArr == [192, 61, 1, 42]) or
                        (cmdArr == [192, 57, 1, 108]) or
                        (cmdArr == [192, 57, 1, 202]) or
                        (cmdArr == [192, 58, 1, 66]) or
                        (cmdArr == [192, 59, 1, 58]) or
                        (cmdArr == [192, 60, 1, 244]) or
                        (cmdArr == [192, 61, 1, 140]) or
                        (cmdArr == [192, 62, 0, 162]) or
                        (cmdArr == [192, 62, 1, 4]) or
                        (cmdArr == [192, 63, 0, 218]) or
                        (cmdArr == [193, 54, 0, 102]) or
                        (cmdArr == [192, 57, 0, 108]) or
                        ((i > 50) and (i<60))): 
                        continue
                    
                    print("cmd:\t ", end='')
                    print(cmdArr, end='')
                    f.write("cmd:\t ")
                    f.write(str(cmdArr))
                    
                    self.socket.send(cmd)
                    sleep(0.01) #seems not necessary
                    data = self.socket.recv(1024)
                    sleep(0.5) #seems not necessary
                    if ((self.status[data[0]] is 'ok') or (self.status[data[0]] is 'invalid access level')):
                        #print('')
                        
                        print("\tdata:\t", end='')
                        print(data)
                        f.write("\tdata:\t")
                        f.write(str(data))
                        f.write('\n')
                        #print(data, end='')
                        #print("cmd status: ", end='')
                        #print(self.status[data[0]])
                        continue
                    
                    else:
                        print('')
                        if (self.status[data[0]] != 'communication timeout'):
                            print('--> unknown return:\t', end='')
                            print(data)
                        f.write('\n')
                        
                    if self.status[data[0]] is 'unknown command':
                        print('uC', end='')
                    
                    if self.status[data[0]] is 'unknown return value2':
                        print('uC', end='')
                        
                    if self.status[data[0]] is 'invalid access level':
                        print('--> invalid access level')
                    
                    if self.status[data[0]] is 'hardware error':
                        print('--> hardware error')
                    
                    if self.status[data[0]] is 'device not ready':
                        print('--> device not ready')
                    
                    if self.status[data[0]] is 'communication timeout':
                        print('--> communication timeout')
             

def crc8(data, iv=0xaa, poly=0xa6):
    value = iv
    for b in data:
        for i in range(8):
            x, value = (value >> 7) ^ (b >> (7-i)) & 1, (value << 1) & 0xff
            if x:
                value ^= poly
    return value