diff --git a/.gitmodules b/.gitmodules
index 9025eb7d66..d0f3fd5656 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -61,3 +61,9 @@
 [submodule "ports/atmel-samd/Adafruit_CircuitPython_seesaw"]
 	path = frozen/Adafruit_CircuitPython_seesaw
 	url = https://github.com/adafruit/Adafruit_CircuitPython_seesaw.git
+[submodule "frozen/Adafruit_CircuitPython_IRRemote"]
+	path = frozen/Adafruit_CircuitPython_IRRemote
+	url = https://github.com/adafruit/Adafruit_CircuitPython_IRRemote.git
+[submodule "frozen/Adafruit_CircuitPython_DotStar"]
+	path = frozen/Adafruit_CircuitPython_DotStar
+	url = https://github.com/adafruit/Adafruit_CircuitPython_DotStar.git
diff --git a/frozen/Adafruit_CircuitPython_CircuitPlayground b/frozen/Adafruit_CircuitPython_CircuitPlayground
index a669915237..d82fb2399b 160000
--- a/frozen/Adafruit_CircuitPython_CircuitPlayground
+++ b/frozen/Adafruit_CircuitPython_CircuitPlayground
@@ -1 +1 @@
-Subproject commit a669915237545638c64f89400f368a91c408cd5d
+Subproject commit d82fb2399b304e4cac10f0001ac63b76dd6b2ba0
diff --git a/frozen/Adafruit_CircuitPython_DotStar b/frozen/Adafruit_CircuitPython_DotStar
new file mode 160000
index 0000000000..af25424ee7
--- /dev/null
+++ b/frozen/Adafruit_CircuitPython_DotStar
@@ -0,0 +1 @@
+Subproject commit af25424ee7dbebea3e5d77390c017018ffa52d36
diff --git a/frozen/Adafruit_CircuitPython_IRRemote b/frozen/Adafruit_CircuitPython_IRRemote
new file mode 160000
index 0000000000..c29e10b590
--- /dev/null
+++ b/frozen/Adafruit_CircuitPython_IRRemote
@@ -0,0 +1 @@
+Subproject commit c29e10b590efbdf06163897b49cd0c2bea82ad6e
diff --git a/frozen/Adafruit_CircuitPython_seesaw b/frozen/Adafruit_CircuitPython_seesaw
index 71f3947ff9..498f59bf92 160000
--- a/frozen/Adafruit_CircuitPython_seesaw
+++ b/frozen/Adafruit_CircuitPython_seesaw
@@ -1 +1 @@
-Subproject commit 71f3947ff94ca070eb01c5f872b0400031be8086
+Subproject commit 498f59bf926477b3a8fb8eb157ca05eb12c3e298
diff --git a/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.h b/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.h
index fd4f92289c..15979ae778 100644
--- a/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.h
+++ b/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.h
@@ -12,6 +12,58 @@
 
 #define CIRCUITPY_INTERNAL_NVM_SIZE  0
 
+// A number of modules are removed for pIRKey to make room for frozen libraries.
+#define PIRKEY_M0 (1)
+
 #include "internal_flash.h"
 
 #define BOARD_FLASH_SIZE (0x00040000 - 0x2000 - 0x010000)
+
+#define IGNORE_PIN_PA02     1
+#define IGNORE_PIN_PA03     1
+#define IGNORE_PIN_PA04     1
+#define IGNORE_PIN_PA05     1
+#define IGNORE_PIN_PA06     1
+#define IGNORE_PIN_PA07     1
+#define IGNORE_PIN_PA08     1
+#define IGNORE_PIN_PA09     1
+#define IGNORE_PIN_PA10     1
+#define IGNORE_PIN_PA11     1
+#define IGNORE_PIN_PA12     1
+#define IGNORE_PIN_PA13     1
+#define IGNORE_PIN_PA14     1
+#define IGNORE_PIN_PA15     1
+#define IGNORE_PIN_PA16     1
+#define IGNORE_PIN_PA17     1
+#define IGNORE_PIN_PA18     1
+#define IGNORE_PIN_PA19     1
+#define IGNORE_PIN_PA20     1
+#define IGNORE_PIN_PA21     1
+#define IGNORE_PIN_PA22     1
+#define IGNORE_PIN_PA24     1
+#define IGNORE_PIN_PA25     1
+#define IGNORE_PIN_PA27     1
+#define IGNORE_PIN_PA30     1
+#define IGNORE_PIN_PA31     1
+#define IGNORE_PIN_PB00     1
+#define IGNORE_PIN_PB01     1
+#define IGNORE_PIN_PB02     1
+#define IGNORE_PIN_PB03     1
+#define IGNORE_PIN_PB04     1
+#define IGNORE_PIN_PB05     1
+#define IGNORE_PIN_PB06     1
+#define IGNORE_PIN_PB07     1
+#define IGNORE_PIN_PB08     1
+#define IGNORE_PIN_PB09     1
+#define IGNORE_PIN_PB10     1
+#define IGNORE_PIN_PB11     1
+#define IGNORE_PIN_PB12     1
+#define IGNORE_PIN_PB13     1
+#define IGNORE_PIN_PB14     1
+#define IGNORE_PIN_PB15     1
+#define IGNORE_PIN_PB16     1
+#define IGNORE_PIN_PB17     1
+#define IGNORE_PIN_PB22     1
+#define IGNORE_PIN_PB23     1
+#define IGNORE_PIN_PB30     1
+#define IGNORE_PIN_PB31     1
diff --git a/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.mk b/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.mk
index 87b46c642f..0f8d0f9ca4 100644
--- a/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.mk
@@ -9,3 +9,8 @@ LONGINT_IMPL = NONE
 
 CHIP_VARIANT = SAMD21E18A
 CHIP_FAMILY = samd21
+
+# Include these Python libraries in firmware.
+FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_DotStar
+FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_HID
+FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_IRRemote
diff --git a/ports/atmel-samd/mpconfigport.h b/ports/atmel-samd/mpconfigport.h
index 0d07e0009e..15cb514049 100644
--- a/ports/atmel-samd/mpconfigport.h
+++ b/ports/atmel-samd/mpconfigport.h
@@ -247,6 +247,23 @@ extern const struct _mp_obj_module_t usb_hid_module;
 #define TOUCHIO_MODULE
 #endif
 
+// A pIRKey has minimal I/O needs. Remove unneeded modules to make room
+// for frozen modules. math is very large and is also removed.
+#ifdef PIRKEY_M0
+#define MICROPY_PORT_BUILTIN_MODULES \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_board), (mp_obj_t)&board_module }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_busio), (mp_obj_t)&busio_module }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_digitalio), (mp_obj_t)&digitalio_module }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_microcontroller), (mp_obj_t)&microcontroller_module }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_os), (mp_obj_t)&os_module }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_pulseio), (mp_obj_t)&pulseio_module }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_random), (mp_obj_t)&random_module }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_storage), (mp_obj_t)&storage_module }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_struct), (mp_obj_t)&struct_module }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_supervisor), (mp_obj_t)&supervisor_module }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_time), (mp_obj_t)&time_module }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_usb_hid),(mp_obj_t)&usb_hid_module },
+#else
 #define MICROPY_PORT_BUILTIN_MODULES \
     { MP_OBJ_NEW_QSTR(MP_QSTR_analogio), (mp_obj_t)&analogio_module }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR_board), (mp_obj_t)&board_module }, \
@@ -267,6 +284,7 @@ extern const struct _mp_obj_module_t usb_hid_module;
     { MP_OBJ_NEW_QSTR(MP_QSTR_usb_hid),(mp_obj_t)&usb_hid_module }, \
     TOUCHIO_MODULE \
     EXTRA_BUILTIN_MODULES
+#endif
 
 #define MICROPY_PORT_BUILTIN_DEBUG_MODULES \
     { MP_OBJ_NEW_QSTR(MP_QSTR_uheap),(mp_obj_t)&uheap_module }, \
diff --git a/shared-bindings/busio/__init__.c b/shared-bindings/busio/__init__.c
index 958ee062af..0ed0bf22db 100644
--- a/shared-bindings/busio/__init__.c
+++ b/shared-bindings/busio/__init__.c
@@ -87,10 +87,13 @@
 
 STATIC const mp_rom_map_elem_t busio_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_busio) },
-    { MP_ROM_QSTR(MP_QSTR_I2C),   MP_ROM_PTR(&busio_i2c_type) },
     { MP_ROM_QSTR(MP_QSTR_SPI),   MP_ROM_PTR(&busio_spi_type) },
+// a pIRKey does not need these. Remove them to make room for frozen modules.
+#ifndef PIRKEY_M0
+    { MP_ROM_QSTR(MP_QSTR_I2C),   MP_ROM_PTR(&busio_i2c_type) },
     { MP_ROM_QSTR(MP_QSTR_OneWire),   MP_ROM_PTR(&busio_onewire_type) },
     { MP_ROM_QSTR(MP_QSTR_UART),   MP_ROM_PTR(&busio_uart_type) },
+#endif
 };
 
 STATIC MP_DEFINE_CONST_DICT(busio_module_globals, busio_module_globals_table);