Arduino mirror image, orientation problem with display MAX7219

How to use MAX7219 LED Matrix with Arduino

Good Libraries to use with the MAX7219 LED are:
https://github.com/MajicDesigns/MD_MAX72XX LED
https://github.com/MajicDesigns/MD_Parola Scrolling

You’ll find lot’s of examples after you install the libraries in the Arduino IDE.

Arduino mirror image, orientation problem with display MAX7219

How to solve problem with the LED matrix MAX7219 and the MD_MAX72xx.h Library

If you have problems with mirroring and/or orientation find following line and try following solutions, Choose one:

#define HARDWARE_TYPE MD_MAX72XX::FC16_HW




#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW




#define HARDWARE_TYPE MD_MAX72XX::GENERIC_HW




#define HARDWARE_TYPE MD_MAX72XX::ICSTATION_HW

Raspberry pi & waveshare 2.7 e-ink Display & python

Here’s some example python code for drawing text horizontal on the waveshare e-ink display. You’ll find also a example where to find the length of text where to break lines. This examples reads some small text from a web site and looks up a rss feed for the weather.

Install the fonts https://www.raspberrypi.org/forums/viewtopic.php?t=133772

Install libraries https://www.waveshare.com/wiki/Pioneer600#Libraries_Installation_for_RPi

ToDo: Code format is broken


# coding: utf8
##
 #  width 176
 #  height 264
 ##

import epd2in7
from PIL import Image
import ImageFont
from PIL import ImageDraw
import time
import urllib2
import feedparser
import datetime

def getLengthText(myTextInput, myFont, pixels):
    #font = ImageFont.truetype('/usr/share/fonts/truetype/freefont/msttcorefonts/comic.ttf', 28)
    #font = ImageFont.truetype("arial", 20)
    myText = myTextInput
    mlen = 0
    mlen = len(myText)
    w, h = myFont.getsize(myText)
    while pixels < w:
        myText = myText[0:mlen-2]
        mlen = len(myText)
        w, h = myFont.getsize(myText)
    return mlen

def addText(myImage,myText, myFont, xx,yy):
    #font = ImageFont.truetype('/usr/share/fonts/truetype/freefont/msttcorefonts/comic.ttf', 28)
    #font = ImageFont.truetype("arial", 20)
    w, h = myFont.getsize(myText)
    mask = Image.new('1', (w, h), 255)
    draw2 = ImageDraw.Draw(mask)
    draw2.text((0, 0), myText, font = myFont, fill = 0)
    mask = mask.rotate(90, expand=True)
    myImage.paste(mask, (xx,epd2in7.EPD_HEIGHT - w - yy ))

def main():
    epd = epd2in7.EPD()
    epd.init()

    image = Image.new('1', (epd2in7.EPD_WIDTH, epd2in7.EPD_HEIGHT), 255)    # 255: clear the image with white
    draw = ImageDraw.Draw(image)
    
    font = ImageFont.truetype("arial", 20)
    font2 = ImageFont.truetype("comic", 24)
    font3 = ImageFont.truetype("arial", 28)

    # get text from a feed
    #d = feedparser.parse('http://www.reddit.com/r/news/.rss')
    d = feedparser.parse('https://www.br.de/wetter/action/feeds/bayernwetter.do')
    dnr = 0
    dlen = len(d['entries'])
    #test
    oberbayern = 0
    for n in range(dlen):
        actentry = d['entries'][n]['title'].encode('utf-8').strip()
        print str(n) + " " + actentry[0:8]
        if actentry[0:8] == "Oberbaye":
            oberbayern = n
        #münchen
        if actentry[0:8] == "München":
            muenchen = n
    
    
    print d['entries'][oberbayern]['title'].encode('utf-8').strip()
    print d['entries'][muenchen]['title'].encode('utf-8').strip()
    nb = d['entries'][oberbayern]['title'].strip()
    
    # get text from a website
    ttext = "ghjk"
    try:
            response = urllib2.urlopen('http://4johannes.de/weather/lowest.txt')
            ttext = response.read().strip()
            print(ttext)
    except:
            print("fehler2")

    # add to display

    # first Line
    grad = u'°'
    #entlang umgerechnet oben 1,1 nach 1,264/2
    draw.line((0, 264, 0, 0), fill = 0)
    draw.line((1, 264, 1, 0), fill = 0)
    addText(image, datetime.datetime.now().strftime("%H:%M %d.%m."), font3, 5, 6)
    addText(image, ttext + grad, font3, 5, 182)
    draw.line((42, 264, 42, 0), fill = 0)
    draw.line((43, 264, 43, 0), fill = 0)
    # senkrechte Linien, wenn quer gesehen
    draw.line((0, 264-180+5, 43, 264-180+5), fill = 0)
    draw.line((0, 264-180+4, 43, 264-180+4), fill = 0)
    draw.line((0, 263, 43, 263), fill = 0)
    draw.line((0, 262, 43, 262), fill = 0)

    draw.line((0, 0, 43, 0), fill = 0)
    draw.line((0, 1, 43, 1), fill = 0)


    muc = "München"
    mstr = d['entries'][muenchen]['title'].strip()
    mstr2 = mstr[mstr.find("):")+3:]
    addText(image, mstr2, font, 50, 0)
    #addText(image, "012345678901234567890123456789", font, 120, 0)
    print(nb.encode('utf-8'))
    xlen = 0
    xlen = getLengthText(nb,font, 264)
    nb1 = nb[0:xlen]
    nbRest = nb[xlen:]
    xlen = getLengthText(nbRest,font, 264)
    nb2 = nbRest[0:xlen]
    nbRest = nbRest[xlen:]
    xlen = getLengthText(nbRest,font, 264)
    nb3 = nbRest[0:xlen]
    nbRest = nbRest[xlen:]
    xlen = getLengthText(nbRest,font, 264)
    nb4 = nbRest[0:xlen]
    nbRest = nbRest[xlen:]
    xlen = getLengthText(nbRest,font, 264)
    nb5 = nbRest[0:xlen]
    
    print(nb1.encode('utf-8'))
    print(nb2.encode('utf-8'))
    print(nb3.encode('utf-8'))
    print(nb4.encode('utf-8'))
    print(nb5.encode('utf-8'))
    addText(image, nb1, font, 80, 0)
    addText(image, nb2, font, 100, 0)
    addText(image, nb3, font, 120, 0)
    addText(image, nb4, font, 140, 0)
    addText(image, nb5, font, 140, 0)


    epd.display_frame(epd.get_frame_buffer(image))
    # display images
    #epd.display_frame(epd.get_frame_buffer(Image.open('demopill2.bmp')))

if __name__ == '__main__':
    main()