Add ext scripts as example

ext/stab_display.py

@@ -0,0 +1,152 @@
+# import math
+# import time
+
+# import Adafruit_GPIO.SPI as SPI
+import Adafruit_SSD1306
+
+from PIL import Image
+from PIL import ImageFont
+from PIL import ImageDraw
+
+
+# Raspberry Pi pin configuration:
+RST = 24
+I2C_ADDRESS = 0x3C    # 011110+SA0+RW - 0x3C or 0x3D
+
+
+class StabDisplay:
+    
+    def __init__(self, i2c_address=I2C_ADDRESS):
+
+        print('__init__(self, ' + str(i2c_address))
+
+        self.i2c_address = i2c_address
+
+        self.disp = None
+        self.width = None
+        self.height = None
+        self.image = None
+        self.draw = None
+
+        self.init_hw()
+        self.volt = ''
+        self.cur = ''
+        self.watt = ''
+        self.daily = ''
+        self.sum = ''
+        self.wtemp = ''
+        self.gtemp = ''
+        self.state = 0
+
+        # Load default font.
+        # self.font = ImageFont.load_default()
+        # Load font
+        self.font_s = ImageFont.truetype('Paul-le1V.ttf', 13)
+        self.font_vs = ImageFont.truetype('Paul-le1V.ttf', 10)
+        # self.font_b = ImageFont.truetype('bigshot.ttf', 20)
+        self.font_b = ImageFont.truetype('gotham-black.ttf', 19)
+        # Alternatively load a TTF font.  Make sure the .ttf font file is in the same directory as this python script!
+        # Some nice fonts to try: http://www.dafont.com/bitmap.php
+        # font = ImageFont.truetype('Minecraftia.ttf', 8)
+
+    def init_hw(self):
+
+        try:
+            # 128x64 display with hardware I2C:
+            self.disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST, i2c_address=self.i2c_address)
+
+            # Initialize library.
+            self.disp.begin()
+
+            # Get display width and height.
+            self.width = self.disp.width
+            self.height = self.disp.height
+
+            # Clear display.
+            self.disp.clear()
+            self.disp.display()
+
+            # Create image buffer.
+            # Make sure to create image with mode '1' for 1-bit color.
+            self.image = Image.new('1', (self.width, self.height))
+
+            # Create drawing object.
+            self.draw = ImageDraw.Draw(self.image)
+
+        except Exception as e:
+            self.online = False
+        else:
+            self.online = True
+
+    def set_values(self, v, c, w, d, s, wt, gt):
+
+        # print('StabDisplay::set_values(' + v + ', ' + c + ', ' + w + ', ' + d + ', ' + s + ', ' + wt + ', ' + gt + ' )')
+        self.volt = v
+        self.cur = c
+        self.watt = w
+        self.daily = d
+        self.sum = s
+        self.wtemp = wt
+        self.gtemp = gt
+       
+    def update(self):
+
+        # print('StabDisplay::update()', self.volt,  self.cur, self.watt, self.daily, self.sum, self.wtemp, self.gtemp)
+
+        if self.online:
+
+            # Clear image buffer by drawing a black filled box.
+            self.draw.rectangle((0, 0, self.width, self.height), outline=0, fill=0)
+
+            # #################################
+            # #      'aktuelle Leistung'      #
+            # # \    'Spannung'       'Strom' #
+            # #   'Gesammt kWh'      'Tag Wh' #
+            # #    'Wassertemp' 'GeraeteTemp' #
+            # #################################
+
+            char_left, char_top, char_right, char_bottom = self.font_b.getbbox(self.watt + ' W')
+            self.draw.text((self.width - char_right - 1, 1), self.watt + ' W', font=self.font_b, fill=255)
+
+            rest = char_bottom
+            progress_list = ['|', '/', '-', '\\']
+            self.draw.text((5, rest + 10), progress_list[self.state], font=self.font_s, fill=255)
+            self.state = self.state + 1
+            if self.state > 3:
+                self.state = 0
+
+            char_left, char_top, char_right, char_bottom = self.font_s.getbbox(self.volt + ' V')
+            self.draw.text((self.width / 2 - char_right - 7, rest + 5), self.volt + ' V', font=self.font_s, fill=255)
+
+            char_left, char_top, char_right, char_bottom = self.font_s.getbbox(self.cur + ' A')
+            self.draw.text((self.width - char_right - 7, rest + 5), self.cur + ' A', font=self.font_s, fill=255)
+
+            rest = rest + char_bottom
+            lsum = len(self.sum)
+            ssum = self.sum[:lsum-3]
+
+            char_left, char_top, char_right, char_bottom = self.font_s.getbbox(ssum + ' kWh')
+            self.draw.text((self.width / 2 - char_right - 7, rest + 10), ssum + ' kWh', font=self.font_s, fill=255)
+
+            char_left, char_top, char_right, char_bottom = self.font_s.getbbox(self.daily + ' Wh')
+            self.draw.text((self.width - char_right - 7, rest + 10), self.daily + ' Wh', font=self.font_s, fill=255)
+
+            rest = rest + char_bottom
+            lwt = len(self.wtemp)
+            char_left, char_top, char_right, char_bottom = self.font_vs.getbbox('W: ' + self.wtemp[:lwt-1] + ' °C')
+            self.draw.text((self.width / 2 - char_right - 7, rest + 15), 'W: ' + self.wtemp[:lwt-1] + ' °C', font=self.font_vs, fill=255)
+
+            char_left, char_top, char_right, char_bottom = self.font_vs.getbbox('G: ' + self.gtemp + ' °C')
+            self.draw.text((self.width - char_right - 7, rest + 15), 'G: ' + self.gtemp + ' °C', font=self.font_vs, fill=255)
+
+            self.disp.image(self.image)
+            self.disp.display()
+        
+        else:
+            self.init_hw()
+            if self.online:
+                self.update()
+
+    
+        
+