Unable to access %s #4

peterbmckinley · 2020-07-18T16:32:04Z

Hi Im keen to use this with my Orange Pi Zero setup. Luma.oled is installed and working, and can display all the luma.examples. I'm using an SSD1306 controller OLED display connected via the i2c bus. When I run the following command from the oledterm directory:

sudo python3 oledterm.py --display ssd1306 --interface i2c --rotate 2

it blows up as follows:

File "oledterm.py", line 55
print "Unable to access %s, try running as root?" % (VIRTUAL_TERMINAL_DEVICE,)

Any clues what might be wrong?

Peter

peterbmckinley · 2020-08-04T20:50:50Z

Correction, I'm using a 1.3" OLED with an SH1106 controller.

I discovered this issue was because your code is written for Python 2. I ran it through 2to3 to convert to Python 3 but now when I run:

python3 oledterm.py --i2c-port 0 --display sh1106

I get:

Traceback (most recent call last):
File "oledterm.py", line 113, in
main()
File "oledterm.py", line 100, in main
term.putch(char)
File "/usr/local/lib/python3.7/dist-packages/luma/core/virtual.py", line 327, in putch
w = self.font.getsize(char)[0]
File "/usr/local/lib/python3.7/dist-packages/PIL/ImageFont.py", line 262, in getsize
size, offset = self.font.getsize(text, False, direction, features, language)
TypeError: expected string

Some junk appears on the screen for a few seconds while the above prints, then it goes blank.

Any thoughts?

Perhaps this is an orphan project......

peterbmckinley · 2020-08-19T21:00:41Z

bump

Krizzel87 · 2020-08-22T17:35:16Z

Hi peterbmckinley,

I have the same Problem like you and i think, i slowly get it work.

I did a convert with 2to3, so the code can run thrue python3, because luma.oled ONLY runs now in Python3.

like you said it runs in trouble in line 100 term.putch(char) with the reason unexpected type, needed string.

Krizzel87 · 2020-08-22T17:39:45Z

So i tried to get it work, what would be nicer than a REAL RETRO PI with OLED Terminal ;-)

        for char in data:
            if '\r' in chr(char):
                term.carriage_return()
            elif chr(10) in chr(char):
                #term.newline()
                # no scroll, no flush
                term.carriage_return()
                x = 0
                term._cy += term._ch
            elif '\b' in chr(char):
                term.backspace()
                x =- 1
            elif '\t' in chr(char):
                term.tab()
            else:
                term.putch(chr(char))

So now the Oled (SSH1106) shows up with number per line.

peterbmckinley · 2020-08-22T17:41:23Z

😳

…

On Sat, 22 Aug 2020, 18:39 Krizzel87, ***@***.***> wrote: So i tried to get it work, what would be nicer than a REAL RETRO PI with OLED Terminal ;-) for char in data: if '\r' in chr(char): term.carriage_return() elif chr(10) in chr(char): #term.newline() # no scroll, no flush term.carriage_return() x = 0 term._cy += term._ch elif '\b' in chr(char): term.backspace() x =- 1 elif '\t' in chr(char): term.tab() else: term.putch(chr(char)) So now the Oled (SSH1106) shows up with number per line. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#4 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AFONLDIUXX25QLX75FPJ5HTSB77GZANCNFSM4PADFK5Q> .

Krizzel87 · 2020-08-22T17:43:57Z

oh and you need to edit the go.sh

insert this

#!/bin/sh -x
python3 oledterm.py --display sh1106 --interface i2c --rotate 0

hope you have installed python libs etc

Krizzel87 · 2020-08-22T17:45:22Z

the only thing I need to learn is how data = subprocess.check_output(["screendump"]) is getting the data

peterbmckinley · 2020-08-22T17:48:15Z

Good luck! I can't help you with that, but good work 🤞😊

Krizzel87 · 2020-08-22T17:48:23Z

here is the full new python 3 code

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# based on:
# Copyright (c) 2014-17 Richard Hull and contributors
# See LICENSE.rst for details.
# PYTHON_ARGCOMPLETE_OK

import os
import time
import sys
import subprocess
from luma.core import cmdline
from luma.core.virtual import terminal
from PIL import ImageFont

VIRTUAL_TERMINAL_DEVICE = "/dev/vcsa"
ROWS = 9
COLS = 31

# based on demo_opts.py
from luma.core import cmdline, error
def get_device(actual_args=None):
    """
    Create device from command-line arguments and return it.
    """
    if actual_args is None:
        actual_args = sys.argv[1:]
    parser = cmdline.create_parser(description='luma.examples arguments')
    args = parser.parse_args(actual_args)

    if args.config:
        # load config from file
        config = cmdline.load_config(args.config)
        args = parser.parse_args(config + actual_args)

    # create device
    try:
        device = cmdline.create_device(args)
    except error.Error as e:
        parser.error(e)

    #print(display_settings(args))

    return device

# based on luma.examples terminal
def make_font(name, size):
    font_path = os.path.abspath(os.path.join(
        os.path.dirname(__file__), 'fonts', name))
    return ImageFont.truetype(font_path, size)


def main():
    if not os.access(VIRTUAL_TERMINAL_DEVICE, os.R_OK):
       print(("Unable to access %s, try running as root?" % (VIRTUAL_TERMINAL_DEVICE,)))
       raise SystemExit

    fontname = "tiny.ttf"
    size = 6

    font = make_font(fontname, size) if fontname else None
    term = terminal(device, font, animate=False)

    term.clear()
    for i in range(0, ROWS):
        term.puts(str(i) * COLS)
    term.flush()
    #time.sleep(1)

    while True:
        # Get terminal text; despite man page, `screendump` differs from reading vcs dev
        #data = file(VIRTUAL_TERMINAL_DEVICE).read()
        data = subprocess.check_output(["screendump"])
	#print [data]
        # Clear, but don't flush to avoid flashing
        #term.clear()
        term._cx, term._cy = (0, 0)
        #term._canvas.rectangle(term._device.bounding_box, fill=term.bgcolor)
        term._canvas.rectangle(term._device.bounding_box, fill="black")

        # puts() flushes on newline(), so reimplement it ourselves
        #term.puts(data)

        for char in data:
            if '\r' in chr(char):
                term.carriage_return()
            elif chr(10) in chr(char):
                #term.newline()
                # no scroll, no flush
                term.carriage_return()
                x = 0
                term._cy += term._ch
            elif '\b' in chr(char):
                term.backspace()
                x =- 1
            elif '\t' in chr(char):
                term.tab()
            else:
                term.putch(chr(char))

        term.flush()
        time.sleep(0.01)
        #print "refresh"
        #print data


if __name__ == "__main__":
    os.system("stty --file=/dev/console rows %d" % (ROWS,))
    os.system("stty --file=/dev/console cols %d" % (COLS,))
    try:
        device = get_device()
        main()
    except KeyboardInterrupt:
        pass

Krizzel87 · 2020-08-22T17:48:34Z

but you can test it!

Krizzel87 · 2020-08-22T17:52:13Z

is luma.oled installed to your python3 and running succesfull?
did you start i2c interface etc=?

Now I have Holiday and want to make a cool pi Server. Learnd python with google^^ and i can read and understand. It was horrible the problem seems to be the change from python2 to python3 wit how Chars and Strings were used.

Krizzel87 · 2020-08-22T17:55:39Z

To run on boot, add to /etc/rc.local:

sudo python3 /home/pi/oledterm/oledterm.py --display sh1106 --interface i2c --rotate 0 &

peterbmckinley · 2020-08-22T18:06:19Z

is luma.oled installed to your python3 and running succesfull?
did you start i2c interface etc=?

Now I have Holiday and want to make a cool pi Server. Learnd python with google^^ and i can read and understand. It was horrible the problem seems to be the change from python2 to python3 wit how Chars and Strings were used.

See OP: "Luma.oled is installed and working, and can display all the luma.examples"

Yes the change from Python 2 to Python 3 is a huge problem for the inexperienced

Krizzel87 · 2020-08-22T18:11:00Z

but i thing the auto boot will only work when you are the ONLY user on your pi and only log in once.

https://www.dexterindustries.com/howto/run-a-program-on-your-raspberry-pi-at-startup/

Krizzel87 · 2020-08-22T18:53:18Z

I test it with pi 4 latest raspian OS and SH1106.
now it Work. Only issue --rotate 1 und 3 does not work correctly.

peterbmckinley · 2020-08-22T18:55:43Z

Fantastic! I'll be home soon and will test it. Im using Orange Pi Zero but hopefully it will work too.

…

On Sat, 22 Aug 2020, 19:53 Krizzel87, ***@***.***> wrote: I test it with pi 4 latest raspian OS and SH1106. now it Work. Only issue --rotate 1 und 3 does not work correctly. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#4 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AFONLDKDZGQWAPHS2RSVG6LSCAH2TANCNFSM4PADFK5Q> .

Krizzel87 · 2020-08-22T20:08:23Z

I fail the hole evening, because i Booted to Desktop and not to CLI, it can be changed in raspi-config .
To test you can start it sudo sh go.sh and then switch via Ctrl Alt F1 to CLI. Have Fun! The front is very tiny, but you can change Size and Type in oledterm.py in Line 58

fontname = "tiny.ttf"
    size = 6

but then you need to resize in line 17, to resize Display

ROWS = 9
COLS = 31

Until Screen looks like this at programm start

000000000000
111111111111
222222222222
333333333333

Not like this

000000001111
111122222222
333333334444
444455555555

Have Fun

peterbmckinley · 2020-08-22T20:54:40Z

It works! Thank you :)

peterbmckinley · 2020-08-23T10:56:04Z

Hi Krizzel87, I've re-opened this issue as I can't get it to autorun at boot.

Adding python3 oledterm/oledterm.py --i2c-port 0 --display sh1106 to /etc/rc.local fails with a Compatibility error.

I tried adding python3 oledterm/oledterm.py --i2c-port 0 --display sh1106 to ~/.profile, which I've used to automatically run other scripts (my Orange Pi Zero is set to automatically login the root account) but the output seems to get stuck in a loop, it's like the oled is trying to display 2 or more processes.

Have you had any success getting oledterm to run automatically at boot?

Krizzel87 · 2020-08-23T11:17:25Z

Okay.

I created a new go.sh with

#!/bin/sh -x
sudo python3 oledterm.py --display sh1106 --interface i2c --rotate 0

Edit /etc/rc.local


#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

# Print the IP address
_IP=$(hostname -I) || true
if [ "$_IP" ]; then
  printf "My IP address is %s\n" "$_IP"
fi

sudo python3 /home/pi/oledterm3/oledterm.py --display sh1106 --interface i2c --rotate 0 &
exit 0

peterbmckinley · 2020-08-23T11:42:16Z

I'm getting this during boot:

[ 33.402269] rc.local[1148]: python3: can't open file 'oledterm/oledterm.py': [Errno 2] No such file or directory

The path I added in /etc/rc.local works fine:

python3 oledterm/oledterm.py --i2c-port 0 --display sh1106

Any idea why it fails to execute during runtime?

Krizzel87 · 2020-08-23T11:53:38Z

You need to Start the script with sudo

SUDO PYTHON3 /home/pi/oledterm/oledterm.py --d sh1106

And you need to use absolute Adress of the oledterm.py

peterbmckinley · 2020-08-23T12:06:03Z

exactly the same

[ 33.826075] rc.local[1166]: python3: can't open file 'oledterm/oledterm.py': [Errno 2] No such file or directory

Here is the complete /etc/rc.local file:

#!/bin/sh -e

rc.local

This script is executed at the end of each multiuser runlevel.

Make sure that the script will "exit 0" on success or any other

value on error.

In order to enable or disable this script just change the execution

bits.

By default this script does nothing.

sudo python3 oledterm/oledterm.py --i2c-port 0 --display sh1106 &

exit 0

You need to Start the script with sudo
SUDO PYTHON3 /home/pi/oledterm/oledterm.py --d sh1106
And you need to use absolute Adress of the oledterm.py

It is the absolute path. It works when I paste it into a Command Prompt

peterbmckinley · 2020-08-23T12:06:44Z

no idea why the formatting is all messed up, sorry about that. #new problems

Krizzel87 · 2020-08-23T12:24:16Z

Hmm... okay. I is that Problem i had last evening, to auto Boot the script via rc.local

I solved it with sudo raspi-config Boot options Boot to Cli with auto login

Krizzel87 · 2020-08-23T13:00:20Z

I'm getting this during boot:

[ 33.402269] rc.local[1148]: python3: can't open file 'oledterm/oledterm.py': [Errno 2] No such file or directory

The path I added in /etc/rc.local works fine:

python3 oledterm/oledterm.py --i2c-port 0 --display sh1106

Any idea why it fails to execute during runtime?

You did not used the absolute Adresse
sudo python3 /home/pi/oledterm/oledterm.py --i2c-port 0 --display sh1106
Here i correct it for you

Absolute Adresse always begin with /xxx/yyy/fite.date

When you use oledterm/oledterm.py --i2c-port 0 --display sh1106 as User it must be saved in your HOME

peterbmckinley · 2020-08-23T13:10:14Z

so editing /etc/rc.local only works with users, not root?

Krizzel87 · 2020-08-23T13:20:18Z

The script rc.local is done durring local loginprogress.

Sudo is to make you root that means

Root is path /
Userpath is /home/pi/

So if you write

Oledterm/oledterm.py

It Will not executed, but if you put this code to rc.local

Sudo python3 /home/pi/oledterm/oledterm.py --display sh1106 --interface i2c &

It will run

peterbmckinley · 2020-08-23T23:28:43Z

I have SSD1306 and also SH1106, its the same problem for both (after editing for the correct display)

This is SSD1306

Krizzel87 · 2020-08-23T23:32:34Z

It Work now for you? No sh1106 ist not the Same SSD1306 both are oled 1.3 inch. Try to play with arduino to see Differenz. Ssd1306 is better

Krizzel87 · 2020-08-23T23:33:58Z

If your TFT run you of screen all the time correct the in oled.py

rows= 9

Try 8 or 7

peterbmckinley · 2020-08-23T23:40:59Z

Let me know when you get it working after login.

Good luck!

Krizzel87 · 2020-08-23T23:47:05Z

It Work

I dont have issues

peterbmckinley · 2020-08-23T23:48:39Z

Can you upload a photo of your oled screen AFTER you log in. As requested before. Mine is fine up to the login screen, but after I log in its unusable.

…

On Mon, 24 Aug 2020, 00:47 Krizzel87, ***@***.***> wrote: It Work I dont have issues — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#4 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AFONLDKXVXBIO54PTFD4K3TSCGTAJANCNFSM4PADFK5Q> .

peterbmckinley · 2020-08-24T00:03:52Z

Also, can I check you changed THIS oledterm.py file and NOT satoshinm's original oledterm.py file? Please confirm

peterbmckinley · 2020-08-24T00:17:38Z

This is SH1106

peterbmckinley · 2020-08-24T00:27:31Z

It Work now for you? No sh1106 ist not the Same SSD1306 both are oled 1.3 inch. Try to play with arduino to see Differenz. Ssd1306 is better

No. see videos.

By the way 0.91" and 0.96" oled displays are always SSD1306 controller.
1.3" oled display is ALMOST always SH1106 controller. They CAN be SSD1306 controller, but this is very rare.

peterbmckinley · 2020-08-24T00:32:08Z

So if you upload a video of your display AFTER YOU LOG IN, and its ok, then I know the problem is with Orange Pi Zero and it can't be fixed. So can you please upload a new video, AFTER log in.

Krizzel87 · 2020-08-24T00:46:51Z

peterbmckinley · 2020-08-24T06:57:14Z

You are lucky! Good work Krizzel87 👍😁

Any idea why its unstable for me? I can't use it.

Would you consider getting an Orange Pi Zero and fixing it for me? As you know its not possible to make a commercial product from a Raspberry Pi, because the Compute module is too expensive.

Krizzel87 · 2020-08-24T10:39:34Z

May be the Resolution is wrong.

Oledterm.py try to play with COLS = 24 and ROWS = 7 . I would try

VIRTUAL_TERMINAL_DEVICE = "/dev/vcsa"
ROWS = 9 
COLS = 31

Or try Other fonts in def main or size.

    fontname = "tiny.ttf"
    size = 6

peterbmckinley · 2020-08-24T10:43:37Z

I know the resolution for both the 0.96" SSD1306 and the 1.3" SSH1106 is 128x64, but surely yours is the same? I haven't changed the defaults. But I'll try it later today. What settings did you use to make it stable?

…

On Mon, 24 Aug 2020, 11:39 Krizzel87, ***@***.***> wrote: May be the Resolution is wrong. Oledterm.py try to play with COLS = 24 and ROWS = 7 . I would try VIRTUAL_TERMINAL_DEVICE = "/dev/vcsa" ROWS = 9 COLS = 31 Or try Other fonts in def main fontname = "tiny.ttf" size = 6 — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#4 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AFONLDI6HFB2HGMKCC2FJNLSCI7PHANCNFSM4PADFK5Q> .

Krizzel87 · 2020-08-24T10:51:52Z

I prefer tiny.ttf, but the are more cool fonts.i use size 6 to 12. But always have to fit COLS and ROWS .

On your screen it you truely have to much
ROWS try 7

peterbmckinley · 2020-08-24T11:41:45Z

Given that yours works and you are using the same resolution display (128x64), please post your CURRENT values for SIZE, ROWS & COLUMNS I will match your values and re-test. Hopefully that will fix my problem.

…

On Mon, 24 Aug 2020, 11:52 Krizzel87, ***@***.***> wrote: I prefer tiny.ttf, but the are more cool fonts.i use size 6 to 12. But always have to fit COLS and ROWS — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#4 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AFONLDOWYSBQIB5AAEJVQETSCJA5NANCNFSM4PADFK5Q> .

Krizzel87 · 2020-08-24T11:54:58Z

Maybe your Problem is that the fontscrip doesnt fit to terminal size and thats why it is shifted? Try to typ clear after logged in

And see if it will Happen again. I valve rows 9 cols 31
Font tiny.ttf size 6

peterbmckinley · 2020-08-24T11:59:48Z

I haven't changed it from the default "Tiny ttf". If you could post your own settings for size, rows and columns for a working system using the same screen it would be very helpful. I haven't changed my settings from the default. (size 6, 9 rows and 31 columns I think from memory) Thanks in advance. Peter

…

On Mon, 24 Aug 2020, 12:55 Krizzel87, ***@***.***> wrote: Maybe your Problem is that the fontscrip doesnt fit to terminal size and thats why it is shifted? Try to typ clear after logged in — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#4 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AFONLDLROQQL7SUWBXYEYLTSCJIKBANCNFSM4PADFK5Q> .

Krizzel87 · 2020-08-24T12:08:41Z

I Gott it to Work like yours.
It shiftig away all the time

peterbmckinley · 2020-08-24T12:11:08Z

You can fix it, I have much confidence in you 😁 Did you use the code from the later commit, that claims to fix this problem? I sent a screenshot

…

On Mon, 24 Aug 2020, 13:08 Krizzel87, ***@***.***> wrote: I Gott it to Work like yours. It shiftig away all the time — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#4 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AFONLDJHDQR5XHVZEKPV2DTSCJJ5RANCNFSM4PADFK5Q> .

Krizzel87 · 2020-08-24T12:35:32Z

Shifting oled. Connected hdmi to see terminal

Fixed oled

Hdmi output

Krizzel87 · 2020-08-24T12:42:00Z

It happend during change virtual Terminal2 with cntl Alt F2 . When i go black to virtual terminal 1 it will work.

Dont know how to change Resolution of Terminals. But how ever the issue is there.

Krizzel87 · 2020-08-24T13:02:25Z

Log in and typ in Bash stty rows 7 and stty col 24

It will change the size off terminal play around to find best valvues

peterbmckinley · 2020-08-24T13:27:53Z

Good work. I'll try it later today when I get home. Peter

…

On Mon, 24 Aug 2020, 14:02 Krizzel87, ***@***.***> wrote: Log in and typ in Bash stty rows 7 and stty col 24 It will change the size off terminal play around to find best valvues — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#4 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AFONLDI73H2YU4MHOBRP5DTSCJQG7ANCNFSM4PADFK5Q> .

peterbmckinley · 2020-08-24T18:05:29Z

Ok I opened T2 with ctrl-alt-F2, but when I went back to T1 (ctrl-alt-F1) the problem is the exactly the same as shown in my videos. 🙄

I know Richard Hull is looking at doing a complete clean-room rebuild of oledterm, with a view to adding to his luma.examples repo. If you can't fix it maybe he can, or maybe you can fix it together.

Check issue #120 on oled.examples Github page.

rm-hull/luma.examples#120 (comment)

Hope this helps

peterbmckinley · 2020-08-24T18:10:19Z

Its good that you're seeing the same issue, so we know it isn't platform specific

peterbmckinley · 2020-08-24T22:14:17Z

Also, can I check you changed THIS oledterm.py file and NOT satoshinm's original oledterm.py file? Please confirm

sorry to be a bore, but can you confirm you modified THIS version of satoshinm's code, and NOT the original?

Satoshinm claims to have fixed our exact problem in this commit. Please advise

Krizzel87 · 2020-08-25T08:02:11Z

Cool never read it before! i used original oledterm. And than run it my self thrue 2to3 and begann to debug it.
Test the code with PI 2 B+ .
But the load is too much. So my project is dead. Try to edit refresh time from 0.01 to 0.05 but is cpu load over 70%.

The code works with no Problems.

peterbmckinley · 2020-08-25T08:11:40Z

Might be worth enabling some virtual RAM by creating additional swap file? In my example 384MB.

dd if=/dev/zero of=/root/myswapfile bs=1M count=384
chmod 600 /root/myswapfile
mkswap /root/myswapfile
swapon /root/myswapfile
nano /etc/fstab and add the line:
/root/myswapfile swap swap defaults 0
swapon -s

I had to do that just to install luma.oled, or the process gets killed from lack of memory.

peterbmckinley closed this as completed Aug 22, 2020

peterbmckinley reopened this Aug 23, 2020

peterbmckinley mentioned this issue Aug 24, 2020

oledterm rm-hull/luma.examples#120

Open

Unable to access %s #4

Unable to access %s #4

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peterbmckinley commented Aug 23, 2020

rc.local

This script is executed at the end of each multiuser runlevel.

Make sure that the script will "exit 0" on success or any other

value on error.

In order to enable or disable this script just change the execution

bits.

By default this script does nothing.

peterbmckinley commented Aug 23, 2020

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