Inky Impression 7 colour - No EEPROM detected

[Krandelbord]

I have Inky Impression (7 colour ePaper/eInk/EPD) (https://thepihut.com/products/inky-impression-7-colour-epaper-eink-epd)

When I do according to instructions: from inky.auto import auto board = auto() I get this tracback.

Traceback (most recent call last): File "", line 1, in File "/home/pi/.local/lib/python3.7/site-packages/inky/auto.py", line 44, in auto raise RuntimeError("No EEPROM detected! You must manually initialise your Inky board.") RuntimeError: No EEPROM detected! You must manually initialise your Inky board.

[jerbzz]

It looks like the inky is not being detected. How have you got it hooked up?

On Tue, 11 May 2021 at 17:09, Krandelbord @.***> wrote:

I have Inky Impression (7 colour ePaper/eInk/EPD) (https://thepihut.com/products/inky-impression-7-colour-epaper-eink-epd)

When I do according to instructions: from inky.auto import auto board = auto() I get this tracback.

Traceback (most recent call last): File "", line 1, in File "/home/pi/.local/lib/python3.7/site-packages/inky/auto.py", line 44, in auto raise RuntimeError("No EEPROM detected! You must manually initialise your Inky board.") RuntimeError: No EEPROM detected! You must manually initialise your Inky board.

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[Krandelbord]

It is connect by GPIO. Finally I managed to do it manually by looking at source code. But I guess auto() should do it for me

[Daveyr]

How did you fix this? I have a yellow phat and a black phat and both are throwing the same errors as yours. They are directly mounted to a Pi4 8Gb.

[Krandelbord]

instead of auto I used "from inky import Inky7Colour as Inky" So to render some image it looks like this:

from inky import Inky7Colour as Inky
from PIL import Image, ImageDraw
inkyphat = Inky()
inkyphat.set_image(rendered_image)
inkyphat.show()

[georgeHall]

HI @Krandelbord, Not sure if you have got anywhere with this. I had a similar issue and found the issue to be the I2C channels being used.

I have a Pi4 and was using the 64 bit RPI os, the I2C bus names are different which means the line https://github.com/pimoroni/inky/blob/master/library/inky/eeprom.py#L137 which is supposed to use the bus /dev/i2c-1. On the 64 bit os the names are /dev/i2c-20 and /dev/i2c-21, this means it cannot find the eeprom as its not on the i2c bus.

I have made a manual fix in my code to change the line i2c_bus = SMBus(1) to i2c_bus = SMBus(20)

[darkmavis1980]

HI @Krandelbord, Not sure if you have got anywhere with this. I had a similar issue and found the issue to be the I2C channels being used.

I have a Pi4 and was using the 64 bit RPI os, the I2C bus names are different which means the line https://github.com/pimoroni/inky/blob/master/library/inky/eeprom.py#L137 which is supposed to use the bus /dev/i2c-1. On the 64 bit os the names are /dev/i2c-20 and /dev/i2c-21, this means it cannot find the eeprom as its not on the i2c bus.

I have made a manual fix in my code to change the line i2c_bus = SMBus(1) to i2c_bus = SMBus(20)

Hi @georgeHall, I'm finding myself in the same issue, I applied that change, and while I don't get an error anymore, the little script, which is literally the one to print your name found on pimoroni, does nothing 🤔

[georgeHall]

Hi @darkmavis1980, we would need to do some debugging to get some more information.

It might be easiest if we chat in the Discord server: https://discord.gg/xZP76WYy