diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 88bca9f..255dafd 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -12,7 +12,7 @@ sphinx:
   configuration: docs/conf.py
 
 build:
-  os: ubuntu-20.04
+  os: ubuntu-lts-latest
   tools:
     python: "3"
 
diff --git a/examples/epd_bitmap.py b/examples/epd_bitmap.py
index 4ed094c..87a4607 100644
--- a/examples/epd_bitmap.py
+++ b/examples/epd_bitmap.py
@@ -34,7 +34,8 @@
 # display = Adafruit_EK79686(176, 264,        # 2.7" Tri-color display
 # display = Adafruit_IL0373(152, 152,         # 1.54" Tri-color display
 # display = Adafruit_UC8151D(128, 296,        # 2.9" mono flexible display
-# display = Adafruit_IL0373(128, 296,         # 2.9" Tri-color display
+# display = Adafruit_IL0373(128, 296,         # 2.9" Tri-color display IL0373
+# display = Adafruit_SSD1680(128, 296,        # 2.9" Tri-color display SSD1680
 # display = Adafruit_IL0398(400, 300,         # 4.2" Tri-color display
 display = Adafruit_IL0373(
     104,
diff --git a/examples/epd_bonnet.py b/examples/epd_bonnet.py
index 0bf1e41..8c21774 100644
--- a/examples/epd_bonnet.py
+++ b/examples/epd_bonnet.py
@@ -10,6 +10,7 @@
 
 from adafruit_epd.epd import Adafruit_EPD
 from adafruit_epd.ssd1675b import Adafruit_SSD1675B
+from adafruit_epd.ssd1680 import Adafruit_SSD1680, Adafruit_SSD1680Z
 
 # create two buttons
 switch1 = DigitalInOut(board.D6)
@@ -25,7 +26,9 @@
 busy = DigitalInOut(board.D17)
 
 # give them all to our driver
-display = Adafruit_SSD1675B(
+# display = Adafruit_SSD1675B(   # Oldest 2.13" Bonnet
+# display = Adafruit_SSD1680(    # Old 2.13" Bonnet
+display = Adafruit_SSD1680Z(  # Newer 2.13" mono display
     122,
     250,
     spi,  # 2.13" HD mono display (rev B)
diff --git a/examples/epd_pillow_demo.py b/examples/epd_pillow_demo.py
index 697cc6c..7dcea7a 100644
--- a/examples/epd_pillow_demo.py
+++ b/examples/epd_pillow_demo.py
@@ -17,7 +17,7 @@
 from adafruit_epd.il91874 import Adafruit_IL91874
 from adafruit_epd.ssd1608 import Adafruit_SSD1608
 from adafruit_epd.ssd1675 import Adafruit_SSD1675
-from adafruit_epd.ssd1680 import Adafruit_SSD1680
+from adafruit_epd.ssd1680 import Adafruit_SSD1680, Adafruit_SSD1680Z
 from adafruit_epd.ssd1681 import Adafruit_SSD1681
 from adafruit_epd.uc8151d import Adafruit_UC8151D
 
@@ -45,12 +45,14 @@
 # display = Adafruit_SSD1608(200, 200,        # 1.54" HD mono display
 # display = Adafruit_SSD1675(122, 250,        # 2.13" HD mono display
 # display = Adafruit_SSD1680(122, 250,        # 2.13" HD Tri-color or mono display
+# display = Adafruit_SSD1680Z(122, 250,       # Newer 2.13" mono display
 # display = Adafruit_SSD1681(200, 200,        # 1.54" HD Tri-color display
 # display = Adafruit_IL91874(176, 264,        # 2.7" Tri-color display
 # display = Adafruit_EK79686(176, 264,        # 2.7" Tri-color display
 # display = Adafruit_IL0373(152, 152,         # 1.54" Tri-color display
 # display = Adafruit_UC8151D(128, 296,        # 2.9" mono flexible display
-# display = Adafruit_IL0373(128, 296,         # 2.9" Tri-color display
+# display = Adafruit_IL0373(128, 296,         # 2.9" Tri-color display IL0373
+# display = Adafruit_SSD1680(128, 296,        # 2.9" Tri-color display SSD1680
 # display = Adafruit_IL0398(400, 300,         # 4.2" Tri-color display
 display = Adafruit_IL0373(
     104,
diff --git a/examples/epd_pillow_image.py b/examples/epd_pillow_image.py
index 4019299..02238ef 100644
--- a/examples/epd_pillow_image.py
+++ b/examples/epd_pillow_image.py
@@ -19,7 +19,7 @@
 from adafruit_epd.il91874 import Adafruit_IL91874
 from adafruit_epd.ssd1608 import Adafruit_SSD1608
 from adafruit_epd.ssd1675 import Adafruit_SSD1675
-from adafruit_epd.ssd1680 import Adafruit_SSD1680
+from adafruit_epd.ssd1680 import Adafruit_SSD1680, Adafruit_SSD1680Z
 from adafruit_epd.ssd1681 import Adafruit_SSD1681
 from adafruit_epd.uc8151d import Adafruit_UC8151D
 
@@ -35,12 +35,14 @@
 # display = Adafruit_SSD1608(200, 200,        # 1.54" HD mono display
 # display = Adafruit_SSD1675(122, 250,        # 2.13" HD mono display
 # display = Adafruit_SSD1680(122, 250,        # 2.13" HD Tri-color or mono display
+# display = Adafruit_SSD1680Z(122, 250,       # Newer 2.13" mono display
 # display = Adafruit_SSD1681(200, 200,        # 1.54" HD Tri-color display
 # display = Adafruit_IL91874(176, 264,        # 2.7" Tri-color display
 # display = Adafruit_EK79686(176, 264,        # 2.7" Tri-color display
 # display = Adafruit_IL0373(152, 152,         # 1.54" Tri-color display
 # display = Adafruit_UC8151D(128, 296,        # 2.9" mono flexible display
-# display = Adafruit_IL0373(128, 296,         # 2.9" Tri-color display
+# display = Adafruit_IL0373(128, 296,         # 2.9" Tri-color display IL0373
+# display = Adafruit_SSD1680(128, 296,        # 2.9" Tri-color display SSD1680
 # display = Adafruit_IL0398(400, 300,         # 4.2" Tri-color display
 display = Adafruit_IL0373(
     104,
diff --git a/examples/epd_simpletest.py b/examples/epd_simpletest.py
index 8a30615..63c0a29 100644
--- a/examples/epd_simpletest.py
+++ b/examples/epd_simpletest.py
@@ -12,7 +12,7 @@
 from adafruit_epd.il91874 import Adafruit_IL91874
 from adafruit_epd.ssd1608 import Adafruit_SSD1608
 from adafruit_epd.ssd1675 import Adafruit_SSD1675
-from adafruit_epd.ssd1680 import Adafruit_SSD1680
+from adafruit_epd.ssd1680 import Adafruit_SSD1680, Adafruit_SSD1680Z
 from adafruit_epd.ssd1681 import Adafruit_SSD1681
 from adafruit_epd.uc8151d import Adafruit_UC8151D
 
@@ -30,11 +30,13 @@
 # display = Adafruit_SSD1675(122, 250,        # 2.13" HD mono display
 # display = Adafruit_SSD1680(122, 250,        # 2.13" HD Tri-color display
 # display = Adafruit_SSD1681(200, 200,        # 1.54" HD Tri-color display
+# display = Adafruit_SSD1681(200, 200,        # 1.54" HD Tri-color display
 # display = Adafruit_IL91874(176, 264,        # 2.7" Tri-color display
 # display = Adafruit_EK79686(176, 264,        # 2.7" Tri-color display
 # display = Adafruit_IL0373(152, 152,         # 1.54" Tri-color display
 # display = Adafruit_UC8151D(128, 296,        # 2.9" mono flexible display
-# display = Adafruit_IL0373(128, 296,         # 2.9" Tri-color display
+# display = Adafruit_IL0373(128, 296,         # 2.9" Tri-color display IL0373
+# display = Adafruit_SSD1680(128, 296,        # 2.9" Tri-color display SSD1680
 # display = Adafruit_IL0398(400, 300,         # 4.2" Tri-color display
 display = Adafruit_IL0373(
     104,

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