micropython-waveshare-epaper
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mcauser
Displaying red-white noise on 1.54" ePaper display
I have the following code in micropython that is running on my Espressif ESP32-PICO-KIT. To this I have attached a WaveShare 1.54" ePaper display (supporting red color).
When I reach the last line the display updates in waves, but I only get white-red noise on the display.
I could (a few years ago) use the same hardware for a test using the Arduino platform.
This is my code:
from machine import Pin, SoftSPI
import epaper1in54b
miso = Pin(9) # not connected
sck = Pin(18) # yellow
mosi = Pin(23) # white
cs = Pin(5) # green
dc = Pin(25) # gray
rst = Pin(21) # orange
busy = Pin(19) # gray
spi = SoftSPI(baudrate=20000000, polarity=0, phase=0, sck=sck, mosi=mosi, miso=miso)
e = epaper1in54b.EPD(spi, cs, dc, rst, busy)
e.init()
w = 200
h = 200
x = 0
y = 0
import framebuf
buf = bytearray(w * h // 8)
fb = framebuf.FrameBuffer(buf, w, h, framebuf.MONO_VLSB)
black = 0
white = 1
red = 2
fb.fill(white)
fb.text('Hello world!', 0, 0,black)
e.display_frame(buf,None)
The result
Any help would be appreciated.
Im using MicroPython v1.16 on 2021-06-18; ESP32 module with ESP32
did you get this to work? I just got a watchy with a display and i'm trying to use this library too. too much of a noob.
I faced with same problem. This library does not fit new displays.
This library version - 1.54" Black/White/Red GDEW0154Z04 e-paper display driver
Current Eink fw version GDEH0154Z90.
Protocol is changed/ Check the pdf https://v4.cecdn.yun300.cn/100001_1909185148/GDEH0154Z90-0111.pdf
It was easier for me to write new driver. Found few cpp libraries. https://github.com/ZinggJM/GxEPD2/blob/3ecef6f63b8fce27bf8c6dbb399a5dfb768a568f/src/epd3c/GxEPD2_154_Z90c.cpp https://github.com/martinberlin/cale-idf/blob/master/components/CalEPD/models/color/gdeh0154z90.cpp
