pi-hole / bookworm / st7789 changes

A lot has changed since this guide was release.

The Pi Hole 6.x release in early 2025 dramatically changed the API.

Bookworm changes how some of the pins are used.

Even the ST7789 MiniPiTFT chip has some different options.

This code was tested and work with a MiniPiTFt on a Pi 4. I'd like to update the guide to support accommidate the software updates.

Author: mikeysklar

Pi_Hole_Ad_Blocker/mini_pitft_stats.py

@@ -19,11 +19,10 @@
 from PIL import Image, ImageDraw, ImageFont
 import adafruit_rgb_display.st7789 as st7789
 
-API_TOKEN = "YOUR_API_TOKEN_HERE"
-api_url = "http://localhost/admin/api.php?summaryRaw&auth="+API_TOKEN
+API_URL = "http://pi.hole/api/stats/summary"
 
 # Configuration for CS and DC pins (these are FeatherWing defaults on M0/M4):
-cs_pin = digitalio.DigitalInOut(board.CE0)
+cs_pin = digitalio.DigitalInOut(board.D17)
 dc_pin = digitalio.DigitalInOut(board.D25)
 reset_pin = None
 
@@ -34,77 +33,67 @@
 spi = board.SPI()
 
 # Create the ST7789 display:
-disp = st7789.ST7789(spi, cs=cs_pin, dc=dc_pin, rst=reset_pin, baudrate=BAUDRATE,
-                     width=135, height=240, x_offset=53, y_offset=40)
+disp = st7789.ST7789(
+    spi,
+    dc_pin,
+    cs_pin,
+    reset_pin,
+    135,
+    240,
+    baudrate=BAUDRATE,
+    x_offset=53,
+    y_offset=40,
+    rotation=90
+)
 
 # Create blank image for drawing.
 # Make sure to create image with mode 'RGB' for full color.
-height = disp.width   # we swap height/width to rotate it to landscape!
-width = disp.height
-image = Image.new('RGB', (width, height))
-rotation = 90
-
-# Get drawing object to draw on image.
+CANVAS_WIDTH  = disp.height
+CANVAS_HEIGHT = disp.width
+image = Image.new('RGB', (CANVAS_WIDTH, CANVAS_HEIGHT))
 draw = ImageDraw.Draw(image)
 
-# Draw a black filled box to clear the image.
-draw.rectangle((0, 0, width, height), outline=0, fill=(0, 0, 0))
-disp.image(image, rotation)
-# Draw some shapes.
-# First define some constants to allow easy resizing of shapes.
-padding = -2
-top = padding
-bottom = height-padding
-# Move left to right keeping track of the current x position for drawing shapes.
-x = 0
-
-
-# Alternatively load a TTF font.  Make sure the .ttf font file is in the
-# same directory as the python script!
-# Some other nice fonts to try: http://www.dafont.com/bitmap.php
-font = ImageFont.truetype('/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf', 24)
-
-# Turn on the backlight
-backlight = digitalio.DigitalInOut(board.D22)
-backlight.switch_to_output()
-backlight.value = True
-
-# Add buttons as inputs
+# Load default font (or replace with a TTF if desired)
+FONT_PATH = "/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf"
+font = ImageFont.truetype(FONT_PATH, 20)
+
 buttonA = digitalio.DigitalInOut(board.D23)
 buttonA.switch_to_input()
 
 while True:
     # Draw a black filled box to clear the image.
-    draw.rectangle((0, 0, width, height), outline=0, fill=0)
+    draw.rectangle((0, 0, CANVAS_WIDTH, CANVAS_HEIGHT), outline=0, fill=(0, 0, 0))
 
     # Shell scripts for system monitoring from here:
     # https://unix.stackexchange.com/questions/119126/command-to-display-memory-usage-disk-usage-and-cpu-load
-    cmd = "hostname -I | cut -d\' \' -f1"
-    IP = "IP: "+subprocess.check_output(cmd, shell=True).decode("utf-8")
-    cmd = "hostname | tr -d \'\\n\'"
+    cmd = "hostname -I | cut -d' ' -f1"
+    IP = "IP: " + subprocess.check_output(cmd, shell=True).decode("utf-8").strip()
+    cmd = "hostname | tr -d '\\n'"
     HOST = subprocess.check_output(cmd, shell=True).decode("utf-8")
     cmd = "top -bn1 | grep load | awk '{printf \"CPU Load: %.2f\", $(NF-2)}'"
     CPU = subprocess.check_output(cmd, shell=True).decode("utf-8")
     cmd = "free -m | awk 'NR==2{printf \"Mem: %s/%s MB  %.2f%%\", $3,$2,$3*100/$2 }'"
     MemUsage = subprocess.check_output(cmd, shell=True).decode("utf-8")
     cmd = "df -h | awk '$NF==\"/\"{printf \"Disk: %d/%d GB  %s\", $3,$2,$5}'"
     Disk = subprocess.check_output(cmd, shell=True).decode("utf-8")
-    cmd = "cat /sys/class/thermal/thermal_zone0/temp |  awk \'{printf \"CPU Temp: %.1f C\", $(NF-0) / 1000}\'" # pylint: disable=line-too-long
+    cmd = "cat /sys/class/thermal/thermal_zone0/temp |  awk '{printf \"CPU Temp: %.1f C\", $(NF-0) / 1000}'"
     Temp = subprocess.check_output(cmd, shell=True).decode("utf-8")
 
-
     # Pi Hole data!
     try:
-        r = requests.get(api_url)
-        data = json.loads(r.text)
-        DNSQUERIES = data['dns_queries_today']
-        ADSBLOCKED = data['ads_blocked_today']
-        CLIENTS = data['unique_clients']
-    except KeyError:
-        time.sleep(1)
-        continue
-
-    y = top
+        r = requests.get(API_URL, timeout=5)
+        r.raise_for_status()
+        data = r.json()
+        DNSQUERIES = data["queries"]["total"]
+        ADSBLOCKED = data["queries"]["blocked"]
+        CLIENTS    = data["clients"]["total"]
+    except (KeyError, requests.RequestException, json.JSONDecodeError):
+        DNSQUERIES = None
+        ADSBLOCKED = None
+        CLIENTS    = None
+
+    y = top = 5
+    x = 5
     if not buttonA.value:  # just button A pressed
         draw.text((x, y), IP, font=font, fill="#FFFF00")
         y += font.getbbox(IP)[3]
@@ -121,13 +110,19 @@
         y += font.getbbox(IP)[3]
         draw.text((x, y), HOST, font=font, fill="#FFFF00")
         y += font.getbbox(HOST)[3]
-        draw.text((x, y), "Ads Blocked: {}".format(str(ADSBLOCKED)), font=font, fill="#00FF00")
-        y += font.getbbox(str(ADSBLOCKED))[3]
-        draw.text((x, y), "Clients: {}".format(str(CLIENTS)), font=font, fill="#0000FF")
-        y += font.getbbox(str(CLIENTS))[3]
-        draw.text((x, y), "DNS Queries: {}".format(str(DNSQUERIES)), font=font, fill="#FF00FF")
-        y += font.getbbox(str(DNSQUERIES))[3]
+        if ADSBLOCKED is not None:
+            txt = f"Ads Blocked: {ADSBLOCKED}"
+            draw.text((x, y), txt, font=font, fill="#00FF00")
+            y += font.getbbox(txt)[3]
+        if CLIENTS is not None:
+            txt = f"Clients: {CLIENTS}"
+            draw.text((x, y), txt, font=font, fill="#0000FF")
+            y += font.getbbox(txt)[3]
+        if DNSQUERIES is not None:
+            txt = f"DNS Queries: {DNSQUERIES}"
+            draw.text((x, y), txt, font=font, fill="#FF00FF")
+            y += font.getbbox(txt)[3]
 
     # Display image.
-    disp.image(image, rotation)
+    disp.image(image)
     time.sleep(.1)