Missing Characters with pigpio

[raysp]

I am having the same problem as mentioned by others with missing characters on the display.

Using GPIO without compat_mode=True exposes the problem.

using GPIO with compat_mode = True solves the problem.

However I would like to use pigpio and with it I seem to have the same issue (perhaps
worse).

Any ideas.

[dbrgn]

Hi @raysp, can you test whether the branch at #98 solves your problem?

[raysp]

I would love to try this. I'm new to all of this package installing. ( Before retirement I was
"in management" so someone else did this.)

I have been using pip3 to install. Could you give me the command needed.

Thanks

[dbrgn]

@raysp sure! Pip can install directly from git:

pip3 install git+https://github.com/makslevental/RPLCD@compat_mode_pigpio

Making electronics is a nice thing to learn in retirement 🙂

[raysp]

now not working at all: pi@raspberrypi:~ $ python lcd.py Traceback (most recent call last): File "lcd.py", line 11, in <module> ,charmap='A02' ) File "/home/pi/.local/lib/python3.7/site-packages/RPLCD/pigpio.py", line 161, in __init__ compat_mode=compat_mode) File "/home/pi/.local/lib/python3.7/site-packages/RPLCD/lcd.py", line 110, in __init__ self.command(0x03) File "/home/pi/.local/lib/python3.7/site-packages/RPLCD/lcd.py", line 401, in command self._send_instruction(value) File "/home/pi/.local/lib/python3.7/site-packages/RPLCD/pigpio.py", line 340, in _send_instruction self._send(value, c.RS_INSTRUCTION) File "/home/pi/.local/lib/python3.7/site-packages/RPLCD/pigpio.py", line 311, in _send if self.compat_mode: AttributeError: 'CharLCD' object has no attribute 'compat_mode' pi@raspberrypi:~ $ more lcd.py import pigpio from RPLCD.pigpio import CharLCD pi = pigpio.pi() import time pi = pigpio.pi() lcd = CharLCD(pi,pin_rs=23,pin_e=24 \ ,pins_data=[12,16,20,21] \ ,cols=16,rows=2 \ ,charmap='A02' ) lcd.cursor_mode = 'blink' count = 0 lcd.write_string('xx8765') while count < 100: print (count) lcd.clear() cf = 'POS:{}'.format(count) print (cf) lcd.write_string(cf) time.sleep(1) count = count + 1 lcd.write_string('Done') pi.stop()

…

On Fri, Apr 3, 2020 at 5:32 PM Danilo Bargen ***@***.***> wrote: @raysp <https://github.com/raysp> sure! Pip can install directly from git: pip3 install ***@***.***_mode_pigpio — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#110 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABUA2NRXTYZJMJAQ2G7KHLTRKZW2XANCNFSM4L4PXUAA> .

[dbrgn]

Ah, I think if you had RPLCD already installed it won't get overwritten with the version from the branch.

Can you try this?

pip3 install -U git+https://github.com/makslevental/RPLCD@compat_mode_pigpio

(-U will upgrade the package)

[raysp]

same error; pip3 install -U git+ https://github.com/makslevental/RPLCD@compat_mode_pigpio Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple Collecting git+https://github.com/makslevental/RPLCD@compat_mode_pigpio Cloning https://github.com/makslevental/RPLCD (to revision compat_mode_pigpio) to /tmp/pip-req-build-tmqwaqi3 Branch 'compat_mode_pigpio' set up to track remote branch 'compat_mode_pigpio' from 'origin'. Switched to a new branch 'compat_mode_pigpio' Building wheels for collected packages: RPLCD Running setup.py bdist_wheel for RPLCD ... done Stored in directory: /tmp/pip-ephem-wheel-cache-r9871ldc/wheels/e4/18/31/7208bb9bac0e8907f99e21aa461bceab9d725012a3b254c981 Successfully built RPLCD Installing collected packages: RPLCD Found existing installation: RPLCD 1.2.2 Uninstalling RPLCD-1.2.2: Successfully uninstalled RPLCD-1.2.2 Successfully installed RPLCD-1.2.2 pi@raspberrypi:~ $ python lcd.py Traceback (most recent call last): File "lcd.py", line 11, in <module> ,charmap='A02' ) File "/home/pi/.local/lib/python3.7/site-packages/RPLCD/pigpio.py", line 161, in __init__ compat_mode=compat_mode) File "/home/pi/.local/lib/python3.7/site-packages/RPLCD/lcd.py", line 110, in __init__ self.command(0x03) File "/home/pi/.local/lib/python3.7/site-packages/RPLCD/lcd.py", line 401, in command self._send_instruction(value) File "/home/pi/.local/lib/python3.7/site-packages/RPLCD/pigpio.py", line 340, in _send_instruction self._send(value, c.RS_INSTRUCTION) File "/home/pi/.local/lib/python3.7/site-packages/RPLCD/pigpio.py", line 311, in _send if self.compat_mode: AttributeError: 'CharLCD' object has no attribute 'compat_mode' pi@raspberrypi:~ $ pip3 install -U git+ https://github.com/makslevental/RPLCD@compat_mode_pigpiopip3 install -U git+ https://github.com/makslevental/RPLCD@compat_mode_pigpio

…

On Fri, Apr 3, 2020 at 5:59 PM Danilo Bargen ***@***.***> wrote: Ah, I think if you had RPLCD already installed it won't get overwritten with the version from the branch. Can you try this? pip3 install -U ***@***.***_mode_pigpio (-U will upgrade the package) — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#110 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABUA2NXTHIQQWCONKZBQME3RKZZ73ANCNFSM4L4PXUAA> .

[raysp]

Just a note on this issue. Apparently the default install location does not have the latest version. I installed it from git an the issue of requiring a contrast pin went away. This missing characters still appear when this is run on a PI 4. I just got a Zero W and (perhaps not surprisingly) pigpiod works fine on this model.

…

On Fri, Apr 3, 2020 at 5:32 PM Danilo Bargen ***@***.***> wrote: @raysp <https://github.com/raysp> sure! Pip can install directly from git: pip3 install ***@***.***_mode_pigpio — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#110 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABUA2NRXTYZJMJAQ2G7KHLTRKZW2XANCNFSM4L4PXUAA> .