diff --git a/ports/esp32/boards/GENERIC/mpconfigboard.cmake b/ports/esp32/boards/GENERIC/mpconfigboard.cmake
index 8fea524555..f69b05f47b 100644
--- a/ports/esp32/boards/GENERIC/mpconfigboard.cmake
+++ b/ports/esp32/boards/GENERIC/mpconfigboard.cmake
@@ -1,2 +1,6 @@
-set(SDKCONFIG_DEFAULTS boards/sdkconfig.base)
+set(SDKCONFIG_DEFAULTS
+    boards/sdkconfig.base
+    boards/sdkconfig.ble
+)
+
 set(MICROPY_FROZEN_MANIFEST ${MICROPY_PORT_DIR}/boards/manifest.py)
diff --git a/ports/esp32/boards/GENERIC_D2WD/mpconfigboard.cmake b/ports/esp32/boards/GENERIC_D2WD/mpconfigboard.cmake
index 4e23666f15..686c78df97 100644
--- a/ports/esp32/boards/GENERIC_D2WD/mpconfigboard.cmake
+++ b/ports/esp32/boards/GENERIC_D2WD/mpconfigboard.cmake
@@ -1,5 +1,6 @@
 set(SDKCONFIG_DEFAULTS
     boards/sdkconfig.base
+    boards/sdkconfig.ble
     boards/GENERIC_D2WD/sdkconfig.board
 )
 
diff --git a/ports/esp32/boards/GENERIC_OTA/mpconfigboard.cmake b/ports/esp32/boards/GENERIC_OTA/mpconfigboard.cmake
index 7b1e146005..ca552d470c 100644
--- a/ports/esp32/boards/GENERIC_OTA/mpconfigboard.cmake
+++ b/ports/esp32/boards/GENERIC_OTA/mpconfigboard.cmake
@@ -1,5 +1,6 @@
 set(SDKCONFIG_DEFAULTS
     boards/sdkconfig.base
+    boards/sdkconfig.ble
     boards/GENERIC_OTA/sdkconfig.board
 )
 
diff --git a/ports/esp32/boards/GENERIC_SPIRAM/mpconfigboard.cmake b/ports/esp32/boards/GENERIC_SPIRAM/mpconfigboard.cmake
index bb441d9ebf..2128edb592 100644
--- a/ports/esp32/boards/GENERIC_SPIRAM/mpconfigboard.cmake
+++ b/ports/esp32/boards/GENERIC_SPIRAM/mpconfigboard.cmake
@@ -1,5 +1,6 @@
 set(SDKCONFIG_DEFAULTS
     boards/sdkconfig.base
+    boards/sdkconfig.ble
     boards/sdkconfig.spiram
 )
 
diff --git a/ports/esp32/boards/TINYPICO/mpconfigboard.cmake b/ports/esp32/boards/TINYPICO/mpconfigboard.cmake
index 990e3e035b..5c31f5c600 100644
--- a/ports/esp32/boards/TINYPICO/mpconfigboard.cmake
+++ b/ports/esp32/boards/TINYPICO/mpconfigboard.cmake
@@ -1,5 +1,6 @@
 set(SDKCONFIG_DEFAULTS
     boards/sdkconfig.base
+    boards/sdkconfig.ble
     boards/sdkconfig.240mhz
     boards/sdkconfig.spiram
     boards/TINYPICO/sdkconfig.board
diff --git a/ports/esp32/boards/sdkconfig.base b/ports/esp32/boards/sdkconfig.base
index e326831a15..c84dd606b2 100644
--- a/ports/esp32/boards/sdkconfig.base
+++ b/ports/esp32/boards/sdkconfig.base
@@ -45,3 +45,7 @@ CONFIG_ESP32_ULP_COPROC_ENABLED=y
 CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
 CONFIG_PARTITION_TABLE_CUSTOM=y
 CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions.csv"
+
+# To reduce iRAM usage
+CONFIG_ESP32_WIFI_IRAM_OPT=n
+CONFIG_ESP32_WIFI_RX_IRAM_OPT=n
diff --git a/ports/esp32/main/CMakeLists.txt b/ports/esp32/main/CMakeLists.txt
index a46e0112c9..eedf3ae9a5 100644
--- a/ports/esp32/main/CMakeLists.txt
+++ b/ports/esp32/main/CMakeLists.txt
@@ -78,6 +78,7 @@ set(MICROPY_SOURCE_QSTR
 set(IDF_COMPONENTS
     app_update
     bootloader_support
+    bt
     driver
     esp32
     esp_common
diff --git a/ports/esp32/mpconfigport.h b/ports/esp32/mpconfigport.h
index 81f8297c50..34be9405e4 100644
--- a/ports/esp32/mpconfigport.h
+++ b/ports/esp32/mpconfigport.h
@@ -126,6 +126,12 @@
 #define MICROPY_PY_THREAD_GIL_VM_DIVISOR    (32)
 
 // extended modules
+#ifndef MICROPY_PY_BLUETOOTH
+#define MICROPY_PY_BLUETOOTH                (1)
+#define MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE (1)
+#define MICROPY_BLUETOOTH_NIMBLE            (1)
+#define MICROPY_BLUETOOTH_NIMBLE_BINDINGS_ONLY (1)
+#endif
 #define MICROPY_PY_UASYNCIO                 (1)
 #define MICROPY_PY_UCTYPES                  (1)
 #define MICROPY_PY_UZLIB                    (1)