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waveshareteam
The samples don't seem to work with rev2.1 boards
I have two displays (a 5.83" and a 2.13", both bw+r), as well as two driver boards: the one that came with the 2.13" display, without a revision number (but with a RST pin, it's not the first revision, as far as I can tell) and a newer rev2.1 driver board.
I tried the samples with the following combinations:
| Controller | Driver board | Display | Result |
|---|---|---|---|
| Raspberry Pi 3b | Pre rev2.1 | 2.13" | Works |
| Raspberry Pi 3b | Pre rev2.1 | 5.83" | Works |
| Raspberry Pi 3b | rev2.1 | 2.13" | Does not work |
| Raspberry Pi 3b | rev2.1 | 5.83" | Does not work |
| Node MCU (Arduino-like) | Pre rev2.1 | 2.13" | Works |
| Node MCU (Arduino-like) | Pre rev2.1 | 5.83" | Works |
| Node MCU (Arduino-like) | rev2.1 | 2.13" | Does not work |
| Node MCU (Arduino-like) | rev2.1 | 5.83" | Does not work |
| Arduino Uno | Pre rev2.1 | 2.13" | Works |
| Arduino Uno | Pre rev2.1 | 5.83" | Works |
| Arduino Uno | rev2.1 | 2.13" | Does not work |
| Arduino Uno | rev2.1 | 5.83" | Does not work |
For all the Raspberry Pi combinations, I ran both the Python and the C samples. The output in the terminal is similar regardless of whether it actually does anything or not - it's just faster when it doesn't work. I also tried different cables, the HAT connector... nothing changes. I actually have two rev2.1 boards and have the exact same issue with both, which makes me think that it isn't a hardware issue (or I'm really not lucky).
Did something change between the rev2.1 and the previous one, which makes the samples incompatible? Any advices on what I could try to pinpoint the issue?
I have a 7.5 in Yellow screen, a rev 2.1 driver board and rpi4, the samples also don't work for me.
Mostly code has update. if not work please cut down reset() RST low level delay time.
Dear Kernald, I also have a 2.13 black and red e-paper. So I use the epd2in13bc library (I think this is the one I must use)
But I so that in that library is missing the partial refresh part https://github.com/waveshare/e-Paper/tree/master/Arduino/epd2in13bc
Can you tell me please what source you use in order to have partial refresh work ? Thanks a lot Denis
@denisjoshua Hello, I'm sorry to tell you that there is no partial refresh on the three-color screen.
Hi, I've got a version 2.1 board of 2in13 yellow e-paper. I've tried Python, C, examples, all examples print E-Paper busy. I've tried on a pi zero and a pi 4.
I'm also unable to use the examples for a 4.2inch 400x300 three-color ePaper module (version 2.1). The epd_4in2_test.py example works, but can't make use of the second color. The epd_4in2b_V2_test.py (which seems to be the right one) does not work.
