Display does not work, receive a waveshare_epd.epd2in7_V2:e-Paper busy error

[emilyboda]

I have followed all installation instructions on the website and I'm getting a display busy error. I have tried the same display with both a Raspberry Pi 2B and a Pi Zero and get the same result. I have enabled SPI (and checked that it's enabled in /boot/config.txt). I checked the SPI is not used by any other services.

I am using a 2.7Inch e-Paper display (Rev2.1) directly connected to the 40-pin header on my Pi.

pi@inkycal:~/e-Paper/RaspberryPi_JetsonNano/python/examples $ python3 epd_2in7_V2_test.py
INFO:root:epd2in7 Demo
INFO:root:init and Clear
DEBUG:waveshare_epd.epd2in7_V2:e-Paper busy

Is there a solution for this problem?

[emilyboda]

That link does not work. Also can someone confirm that this is legit before I download something from a random website onto my computer?

Edit: looks like the link wasn't legit, someone deleted the comment.

[emilyboda]

As an update, I have both the 4-button 2.7 inch screen and the no button 4.2 inch screen. I'm attempting to run any of the examples on my raspberry pi. I've tried running it with python and I get a "busy" error message. I've also tried compiling the examples in C and I get the same error message:

pi@buddylistpi:~/e-Paper/RaspberryPi_JetsonNano/c $ sudo ./epd 
EPD_4IN2_V2_test Demo
/***********************************/ 
Current environment: Raspbian
/***********************************/ 
e-Paper Init and Clear...
Debug: e-Paper busy

It looks like this has been going on for several months. Is there a fix?

At this point I'm considering buying from another brand because of the lack of a fix for this problem. I also have an InkyPHAT e-paper screen that works without issue.

[emilyboda]

I have tried a fresh install on the version of raspbian OS that the docs say has been tested with the instructions (https://downloads.raspberrypi.org/raspbian_full/images/raspbian_full-2019-04-09/2019-04-08-raspbian-stretch-full.zip)

I'm still getting the same error:

pi@raspberrypi:~/e-Paper/RaspberryPi_JetsonNano/python/examples $ python3 epd_4in2_V2_test.py 
INFO:root:epd4in2 Demo
INFO:root:init and Clear
DEBUG:waveshare_epd.epd4in2_V2:e-Paper busy