diff --git a/README.md b/README.md
index e9e5514..5ca5663 100644
--- a/README.md
+++ b/README.md
@@ -192,6 +192,20 @@ Implemented interfaces:
 
 </details>
 
+### Adafruit KB2040
+<details>
+
+Implemented interfaces:
+ - GPIO
+ - ADC
+ - PWM
+ - UART0
+ - I2C0
+ - SPI0
+ - WS2812B
+
+</details>
+
 ### Adafruit Trinkey QT2040
 <details>
 
diff --git a/firmware/README.md b/firmware/README.md
index 6812653..9d463bf 100644
--- a/firmware/README.md
+++ b/firmware/README.md
@@ -41,6 +41,8 @@ KERNEL=="hidraw*", ATTRS{idVendor}=="239a", ATTRS{idProduct}=="812E", TAG+="uacc
 KERNEL=="hidraw*", ATTRS{idVendor}=="239a", ATTRS{idProduct}=="812C", TAG+="uaccess", GROUP="plugdev", MODE="0660"
 # Adafruit ItsyBitsy
 KERNEL=="hidraw*", ATTRS{idVendor}=="239a", ATTRS{idProduct}=="00fd", TAG+="uaccess", GROUP="plugdev", MODE="0660"
+# Adafruit KB2040
+KERNEL=="hidraw*", ATTRS{idVendor}=="239a", ATTRS{idProduct}=="0105", TAG+="uaccess", GROUP="plugdev", MODE="0660"
 # Adafruit QT2040 Trinkey
 KERNEL=="hidraw*", ATTRS{idVendor}=="239a", ATTRS{idProduct}=="0109", TAG+="uaccess", GROUP="plugdev", MODE="0660"
 # Adafruit QTPY
@@ -73,7 +75,8 @@ Compatible board can be:
  - FEATHER_CAN
  - FEATHER_EPD
  - FEATHER_RFM
- - ITSYBITSY 
+ - ITSYBITSY
+ - KB2040
  - QTPY
  - QT2040_TRINKEY
 
diff --git a/firmware/build-all.sh b/firmware/build-all.sh
index c981e20..996235d 100755
--- a/firmware/build-all.sh
+++ b/firmware/build-all.sh
@@ -33,4 +33,5 @@ build qt2040_trinkey QT2040_TRINKEY 0 0 1000 0
 build feather_epd FEATHER_EPD 0 1 1000 0
 build feather_rfm FEATHER_RFM 0 1 1000 0
 build feather_can FEATHER_CAN 0 1 1000 0
+build kb2040 KB2040 0 1 1000 0
 
diff --git a/source/machine/u2if.py b/source/machine/u2if.py
index 70649e0..d49b032 100644
--- a/source/machine/u2if.py
+++ b/source/machine/u2if.py
@@ -12,6 +12,7 @@
     (0x239a, 0x812C),  # Adafruit Feather ThinkInk
     (0x239a, 0x812E),  # Adafruit Feather RFM
     (0x239a, 0x00fd),  # Adafruit ItsyBitsy
+    (0x239a, 0x0105),  # Adafruit KB2040
     (0x239a, 0x0109),  # Adafruit QT2040 Trinket
     (0x239a, 0x00f7),  # Adafruit QTPY
 ]