Loop keeps populating old data - Raspberry Pi Forums

i posed question on reddit got no response. have python script gets data via serial rs232 , prints out. code works well, updating @ rapid pace.

code: select all

import serial  port = serial.serial("/dev/ttyusb0", baudrate=9600, timeout=3.0)  def filewrite(rcv):     logfile = open("templog.txt", "a")     logfile.write(rcv)     logfile.close  while true:     rcv = port.readline()         print("received: " + repr(rcv))

when put google script populate data read on first pass, on , on again. doing wrong?

code: select all

#!/usr/bin/python   # software. import sys import time import datetime import serial import adafruit_dht import gspread   port = serial.serial("/dev/ttyusb0", baudrate=9600, timeout=3.0)  # google docs account email, password, , spreadsheet name. gdocs_email            = '@gmail.com' gdocs_password         = 'password' gdocs_spreadsheet_name = 'weight'  # how long wait (in seconds) between measurements. frequency_seconds      = 15  def filewrite(rcv):     logfile = open("templog.txt", "a")     logfile.write(rcv)     logfile.close def login_open_sheet(email, password, spreadsheet):     """connect google docs spreadsheet , return first worksheet."""     try:         gc = gspread.login(email, password)         worksheet = gc.open(spreadsheet).sheet1         return worksheet     except:         print 'unable login , spreadsheet.  check email, password, spreadsheet name.'         sys.exit(1)     print 'logging sensor measurements {0} every {1} seconds.'.format(gdocs_spreadsheet_name, frequency_seconds) print 'press ctrl-c quit.' worksheet = none   while true:     # login if necessary.     if worksheet none:         worksheet = login_open_sheet(gdocs_email, gdocs_password, gdocs_spreadsheet_name)      # attempt sensor reading.     rcv = port.readline()     # skip next reading if valid measurement couldn't taken.     # might happen if cpu under lot of load , sensor     # can't reliably read (timing critical read sensor).     print("received: " + repr(rcv))     str = (rcv)     lb = (str[7:13])     print(lb)                   # append data in spreadsheet, including timestamp     try:         worksheet.append_row((datetime.datetime.now(), lb))     except:         # error appending data, because credentials stale.         # null out worksheet login performed @ top of loop.         print 'append error, logging in again'         worksheet = none         time.sleep(frequency_seconds)         continue      # wait 30 seconds before continuing     print 'wrote row {0}'.format(gdocs_spreadsheet_name)     time.sleep(frequency_seconds)

does ``print(bl)`` line expect? timestamp in spreadsheet correct?

filewrite() anything? debugging?

finally, don't know if it's relevant here it's bad idea use reserved words such str variable names , in python putting things inside brackets standard way create tuple it's potentially confusing put expressions inside brackets no reason.

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