if c1==1:

c1 = "Select * From tag_logs where reader_id = 'Reader_001' and timestamp > '" + str(t) +"' and tag_no = '55992086130'"
    c1 = mycursor.fetchone()
    #print(c1)
    #mycursor.execute("Select * From tag_logs where reader_id = 'Reader_001' and timestamp >='" + str(t) +"' and tag_no = '55992086130'")

    cursor = mydb.cursor(buffered=True)

    if c1 == 1:
       ser.write(b'H')
       print('done')

    else:
      ser.write(b'L')
      print('deny')

    mycursor.execute(c1