My first script does not work anymore

[redfirebrooks]

Hello,
I began in python few month ago and wrote a script for a raspberry pi to display on a ssd1306 oled screen some informations.
Everyhting was fine but since few weeks the code does not run anymore.

I have this error each time I try to launch the script(but it used to work):

Error:
pi@domoticz:~/scripts $ python /home/pi/scripts/simpletime01.py &
[1] 24405
pi@domoticz:~/scripts $ Traceback (most recent call last):
  File "/home/pi/scripts/simpletime01.py", line 192, in <module>
    display_info()
  File "/home/pi/scripts/simpletime01.py", line 140, in display_info
    disp.display()
  File "build/bdist.linux-armv7l/egg/Adafruit_SSD1306/SSD1306.py", line 167, in display
  File "build/bdist.linux-armv7l/egg/Adafruit_SSD1306/SSD1306.py", line 129, in command
  File "build/bdist.linux-armv7l/egg/Adafruit_GPIO/I2C.py", line 116, in write8
  File "build/bdist.linux-armv7l/egg/Adafruit_PureIO/smbus.py", line 256, in write_byte_data
IOError: [Errno 121] Remote I/O error
python /home/pi/scripts/nano time01.py^C
[1]+  Termine 1               python /home/pi/scripts/simpletime01.py

Coils someone help me to resolve this / understand why it suddenly stopped to work please

My code is

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import datetime,time
import subprocess
import Adafruit_GPIO.SPI as SPI
import Adafruit_SSD1306
import os
import locale
from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont
import RPi.GPIO as GPIO

# Set up GPIO with internal pull-up
GPIO.setmode(GPIO.BCM)
GPIO.setup(18, GPIO.IN, pull_up_down=GPIO.PUD_UP)

# Set et initialize OLED display
RST = None
disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST)

disp.begin()
disp.clear()
disp.display()

width = disp.width
height = disp.height
image = Image.new('1', (width, height))

draw = ImageDraw.Draw(image)

draw.rectangle((0,0,width,height), outline=0, fill=0)

padding = -2
top = padding
bottom = height-padding
x = 0

# Set fonts
font1 = ImageFont.truetype("/home/pi/scripts/Tahoma.ttf", 12)
font2 = ImageFont.truetype("/home/pi/scripts/Tahoma.ttf", 24)
font3 = ImageFont.truetype("/home/pi/scripts/Tahoma.ttf", 10)

prev_millis = 0
display = 0

# Define refresh delay
now = datetime.datetime.now()
nextSecond = now+datetime.timedelta(seconds=1)
nextSecondHalf = now+datetime.timedelta(seconds=.5)

# Define temperature
temp = os.popen("vcgencmd measure_temp").readline()
temperature = temp.replace("temp=","")

# Define WIFI signal
signal = os.popen("iwconfig wlan0|awk '/Link Quality/{split($2,a,\"=|/\");print int((a[2]/a[3])*100)\"%\"}'").readline()
signal_int = int(signal.replace("%",""))

#signal_int = os.popen("iwconfig wlan0|awk '/Link Quality/{split($2,a,\"=|/\");print int((a[2]/a[3])*100)}'").readline()

def display_time(temperature,signal,signal_int):

	global font1, font2, font3

	locale.setlocale(locale.LC_TIME, 'fr_FR.utf8')
	current_time = time.strftime("%H:%M:%S")
	current_date = time.strftime("%a %d %b %Y")
	date = current_date.decode('utf-8')
	draw.rectangle((0,0,width,height), outline=0, fill=0)

	x = 0
	draw.ellipse((x, 0 , x+8, 8), outline=255, fill=0)
	x = 11
	draw.ellipse((x, 0 , x+8, 8), outline=255, fill=0)
	x = 22
	draw.ellipse((x, 0 , x+8, 8), outline=255, fill=0)
	x = 33
	draw.ellipse((x, 0 , x+8, 8), outline=255, fill=0)

	if int(signal_int) > 25:
		x = 0
		draw.ellipse((x+2, 2 , x+6, 6), outline=255, fill=255)

	if int(signal_int) > 50:
		x = 11
		draw.ellipse((x+2, 2 , x+6, 6), outline=255, fill=255)

	if int(signal_int) > 75:
		x = 22
		draw.ellipse((x+2, 2 , x+6, 6), outline=255, fill=255)

	if int(signal_int) > 99:
		x = 33
		draw.ellipse((x+2, 2 , x+6, 6), outline=255, fill=255)

	# font = font3
	# x = (disp.width)-64-(string_width(font,signal))
	# draw.text((x, top+12), signal, font=font3, fill=255)

	font = font1
	x = (disp.width)-(string_width(font,temperature))
	draw.text((x, top), temperature, font=font1, fill=255)

	font = font2
	x = (disp.width/2)-(string_width(font,current_time)/2)
	draw.text((x, top+16), current_time, font=font2, fill=255)

	font = font1
	x = (disp.width/2)-(string_width(font,date)/2)
	draw.text((x, top+40),date, font=font1, fill=255)

	disp.image(image)
	disp.display()

def display_blank():

	draw.rectangle((0,0,width,height), outline=0, fill=0)
	disp.image(image)
	disp.display()

def display_info():

	global font1, font2, font3
	draw.rectangle((0,0,width,height), outline=0, fill=0)

	cmd = "hostname -I | cut -d\' \' -f1"
	IP = subprocess.check_output(cmd, shell = True )
	essid = os.popen("iwconfig wlan0|grep 'ESSID'|awk -F ' ' '{print $4}'").readline()
	link_quality = os.popen("iwconfig wlan0 | grep 'Link' | awk -F ' ' '{print $1,$2}'").readline()
	signal_level = os.popen("iwconfig wlan0 | grep 'Signal' | awk -F ' ' '{print $3,$4,$5}'").readline()

	draw.text((x, top),		str(essid),					font=font1, fill=255)
	draw.text((x, top+16),	"IP: " + str(IP),			font=font1, fill=255)
	draw.text((x, top+30),	str(link_quality),			font=font1, fill=255)
	draw.text((x, top+44),	str(signal_level),			font=font1, fill=255)

	disp.image(image)
	disp.display()

def display_info2():

	global font1, font2, font3
	draw.rectangle((0,0,width,height), outline=0, fill=0)

	cmd = "hostname -I | cut -d\' \' -f1"
	IP = subprocess.check_output(cmd, shell = True )
	essid = os.popen("iwconfig wlan0|grep 'ESSID'|awk -F ' ' '{print $4}'").readline()
	link_quality = os.popen("iwconfig wlan0 | grep 'Link' | awk -F ' ' '{print $1,$2}'").readline()
	signal_level = os.popen("iwconfig wlan0 | grep 'Signal' | awk -F ' ' '{print $3,$4,$5}'").readline()

	draw.text((x, top),		str(essid),					font=font1, fill=255)
	draw.text((x, top+16),	"IP: " + str(IP),			font=font1, fill=255)
	draw.text((x, top+30),	str(link_quality),			font=font1, fill=255)
	draw.text((x, top+44),	str(signal_level),			font=font1, fill=255)

	disp.image(image)
	disp.display()

def string_width(fontType,string):

	string_width = 0
	for i, c in enumerate(string):
		char_width, char_height = draw.textsize(c, font=fontType)
		string_width += char_width
	return string_width

while True:

	now = datetime.datetime.now()
	millis = int(round(time.time() * 1000))

	if now > nextSecond:
		temp = os.popen("vcgencmd measure_temp").readline()
		temperature = temp.replace("temp=","")
		signal = os.popen("iwconfig wlan0|awk '/Link Quality/{split($2,a,\"=|/\");print int((a[2]/a[3])*100)\"%\"}'").readline()
		signal_int = int(signal.replace("%",""))
		nextSecond = now+datetime.timedelta(seconds=1)

	if((millis - prev_millis) > 300):
		# Cycle through different displays
		if(not GPIO.input(18)):
			display += 1
			if(display > 2):
				display = 0
			prev_millis = int(round(time.time() * 1000))

	if(display == 0):
		display_time(temperature,signal,signal_int)
	elif(display == 1):
		display_info()
	elif(display == 2):
		display_blank()

	# Turn off the display after a delay
	if((millis - prev_millis) > 600000):
		display = 2
		prev_millis = int(round(time.time() * 1000))

	time.sleep(0.1)

[Larz60+]

I see you used ctrl-c to exit program.

So it's getting hung up somewhere (on surface it looks like the while loop starting at line 169).

Besides looking at code step by step, you can do a couple of things to isolate the problem.

1. run in debugger (your IDE should have one) step through to see where hang-up is occurring.
   
2. Please a print statement at the start of each function that prints name of function.
   This will isolate to a single function.
   

[redfirebrooks]

hello, thanks for your help
for some reasons I tried to reinstall all my libraries and it solved the problem... it is working for more than 24h now without any failure...