diff --git a/.github/workflows/githubci.yml b/.github/workflows/githubci.yml
index ebeb216..3dbc14e 100644
--- a/.github/workflows/githubci.yml
+++ b/.github/workflows/githubci.yml
@@ -1,20 +1,55 @@
 name: Build
 
 on:
-  push:
   pull_request:
+  push:
+  repository_dispatch:
   release:
-    types: [published]
+    types:
+      - created
 
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        board:
+          # Adafruit Boards
+          - 'circuitplayground_nrf52840'
+          - 'clue_nrf52840'
+          - 'feather_nrf52832'
+          - 'feather_nrf52840_express'
+          - 'feather_nrf52840_sense'
+          - 'itsybitsy_nrf52840_express'
+          - 'metro_nrf52840_express'
+          # Alphabetical order
+          - 'ADM_B_NRF52840_1'
+          - 'ae_bl652_bo'
+          - 'aramcon_badge_2019'
+          - 'arcade_feather_nrf52840_express'
+          - 'arduino_nano_33_ble'
+          - 'bast_ble'
+          - 'bluemicro_nrf52840'
+          - 'electronut_labs_papyr'
+          - 'ikigaisense_vita'
+          - 'mdk_nrf52840_dongle'
+          - 'nice_nano'
+          - 'nrf52840_m2'
+          - 'ohs2020_badge'
+          - 'particle_argon'
+          - 'particle_boron'
+          - 'particle_xenon'
+          - 'pca10056'
+          - 'pca10059'
+          - 'pca10100'
+          - 'pitaya_go'
+          - 'raytac_mdbt50q_rx'
+          - 'waveshare_nrf52840_eval'
+
     steps:
     - name: Setup Python
       uses: actions/setup-python@v2
-      with:
-        # 3.9 has issue with intelhex https://github.com/python-intelhex/intelhex/issues/45
-        python-version: '3.8'
 
     - name: Setup Node.js
       uses: actions/setup-node@v1
@@ -34,13 +69,28 @@ jobs:
         echo `echo $HOME/opt/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/*/.content/bin` >> $GITHUB_PATH
     
     - name: Build
-      run: python3 tools/build_all.py
+      run: |
+        make BOARD=${{ matrix.board }} all
+        make BOARD=${{ matrix.board }} copy-artifact
       
+    - uses: actions/upload-artifact@v2
+      with:
+        name: ${{ matrix.board }}
+        path: _bin/${{ matrix.board }}
+
+    - name: Creat Release Asset
+      if: ${{ github.event_name == 'release' }}
+      run: zip -jr ${{ matrix.board }}_bootloader-${{ github.event.release.tag_name }}.zip _bin/${{ matrix.board }}
+
     - name: Upload Release Asset
-      if: github.event_name == 'release' && (github.event.action == 'published' || github.event.action == 'rerequested')
-      working-directory: tools
+      id: upload-release-asset
+      uses: actions/upload-release-asset@v1
       env:
-        UPLOAD_URL: ${{ github.event.release.upload_url }}
-        ADABOT_GITHUB_ACCESS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      run: "[ -z \"$ADABOT_GITHUB_ACCESS_TOKEN\" ] || python3 -u upload_release_files.py"
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      if: ${{ github.event_name == 'release' }}
+      with:
+        upload_url: ${{ github.event.release.upload_url }}
+        asset_path: ${{ matrix.board }}_bootloader-${{ github.event.release.tag_name }}.zip
+        asset_name: ${{ matrix.board }}_bootloader-${{ github.event.release.tag_name }}.zip
+        asset_content_type: application/zip
       
diff --git a/.travis.yml.bck b/.travis.yml.bck
deleted file mode 100644
index b572bd2..0000000
--- a/.travis.yml.bck
+++ /dev/null
@@ -1,31 +0,0 @@
-sudo: required
-dist: xenial
-language: c
-compiler:
-  - gcc
-
-deploy:
-  provider: releases
-  api_key: "$GITHUB_TOKEN"
-  file_glob: true
-  file: "$TRAVIS_BUILD_DIR/bin/*/*"
-  skip_cleanup: true
-  on:
-    tags: true
-
-before_script:
-  - (wget https://s3.amazonaws.com/adafruit-circuit-python/gcc-arm-embedded_7-2018q2-1~xenial1_amd64.deb && sudo dpkg -i gcc-arm-embedded*_amd64.deb)
-  - (wget https://www.nordicsemi.com/api/sitecore/Products/DownloadPlatform --post-data=fileid=8F19D314130548209E75EFFADD9348DB -O cli-tools.tar && tar -xv -f cli-tools.tar && mv mergehex mergehex_all && mv mergehex_all/mergehex .)
-  - export PATH=.:$PATH
-  - mergehex --version
-
-  # report some good version numbers to the build
-  - gcc --version
-  - arm-none-eabi-gcc --version
-  - python3 --version
-  - python --version
-  - sudo apt-get install -y python3-pip python3-setuptools
-  - pip3 install --user adafruit-nrfutil
-
-script:
-  - python3 tools/build_all.py
diff --git a/Makefile b/Makefile
index d496e69..a7bcb90 100644
--- a/Makefile
+++ b/Makefile
@@ -28,10 +28,10 @@ GIT_VERSION := $(shell git describe --dirty --always --tags)
 GIT_SUBMODULE_VERSIONS := $(shell git submodule status | cut -d" " -f3,4 | paste -s -d" " -)
 
 # compiled file name
-OUT_FILE = $(BOARD)_bootloader-$(GIT_VERSION)
+OUT_NAME = $(BOARD)_bootloader-$(GIT_VERSION)
 
 # merged file = compiled + sd
-MERGED_FILE = $(OUT_FILE)_$(SD_NAME)_$(SD_VERSION)
+MERGED_FILE = $(OUT_NAME)_$(SD_NAME)_$(SD_VERSION)
 
 #------------------------------------------------------------------------------
 # Tool configure
@@ -46,6 +46,16 @@ OBJCOPY = $(CROSS_COMPILE)objcopy
 SIZE    = $(CROSS_COMPILE)size
 GDB     = $(CROSS_COMPILE)gdb
 
+# Set make directory command, Windows tries to create a directory named "-p" if that flag is there.
+ifneq ($(OS), Windows_NT)
+  MKDIR = mkdir -p
+else
+  MKDIR = mkdir
+endif
+
+RM = rm -rf
+CP = cp
+
 # Flasher utility options
 NRFUTIL = adafruit-nrfutil
 NRFJPROG = nrfjprog
@@ -66,15 +76,6 @@ else
   $(error Unsupported flash utility: "$(FLASHER)")
 endif
 
-# Set make directory command, Windows tries to create a directory named "-p" if that flag is there.
-ifneq ($(OS), Windows_NT)
-  MK = mkdir -p
-else
-  MK = mkdir
-endif
-
-RM = rm -rf
-
 # auto-detect BMP on macOS, otherwise have to specify
 BMP_PORT ?= $(shell ls -1 /dev/cu.usbmodem????????1 | head -1)
 GDB_BMP = $(GDB) -ex 'target extended-remote $(BMP_PORT)' -ex 'monitor swdp_scan' -ex 'attach 1'
@@ -93,6 +94,7 @@ endif
 
 # Build directory
 BUILD = _build/build-$(BOARD)
+BIN = _bin/$(BOARD)
 
 # Board specific
 -include src/boards/$(BOARD)/board.mk
@@ -334,7 +336,7 @@ INC_PATHS = $(addprefix -I,$(IPATH))
 .PHONY: all clean flash dfu-flash sd gdbflash gdb
 
 # default target to build
-all: $(BUILD)/$(OUT_FILE).out $(BUILD)/$(OUT_FILE)-nosd.hex $(BUILD)/$(OUT_FILE)-nosd.uf2 $(BUILD)/$(MERGED_FILE).hex $(BUILD)/$(MERGED_FILE).zip
+all: $(BUILD)/$(OUT_NAME).out $(BUILD)/$(OUT_NAME)_nosd.hex $(BUILD)/update-$(OUT_NAME)_nosd.uf2 $(BUILD)/$(MERGED_FILE).hex $(BUILD)/$(MERGED_FILE).zip
 
 # Print out the value of a make variable.
 # https://stackoverflow.com/questions/16467718/how-to-print-out-a-variable-in-makefile
@@ -345,10 +347,11 @@ print-%:
 
 # Create build directories
 $(BUILD):
-	@$(MK) "$@"
+	@$(MKDIR) "$@"
 
 clean:
 	@$(RM) $(BUILD)
+	@$(RM) $(BIN)
 
 # Create objects from C SRC files
 $(BUILD)/%.o: %.c
@@ -361,7 +364,7 @@ $(BUILD)/%.o: %.S
 	@$(CC) -x assembler-with-cpp $(ASFLAGS) $(INC_PATHS) -c -o $@ $<
 
 # Link
-$(BUILD)/$(OUT_FILE).out: $(BUILD) $(OBJECTS)
+$(BUILD)/$(OUT_NAME).out: $(BUILD) $(OBJECTS)
 	@echo LD $(notdir $@)
 	@$(CC) -o $@ $(LDFLAGS) $(OBJECTS) -Wl,--start-group $(LIBS) -Wl,--end-group
 	@$(SIZE) $@
@@ -369,29 +372,38 @@ $(BUILD)/$(OUT_FILE).out: $(BUILD) $(OBJECTS)
 #------------------- Binary generator -------------------
 
 # Create hex file (no sd, no mbr)
-$(BUILD)/$(OUT_FILE).hex: $(BUILD)/$(OUT_FILE).out
+$(BUILD)/$(OUT_NAME).hex: $(BUILD)/$(OUT_NAME).out
 	@echo Create $(notdir $@)
 	@$(OBJCOPY) -O ihex $< $@
 
 # Hex file with mbr (still no SD)
-$(BUILD)/$(OUT_FILE)-nosd.hex: $(BUILD)/$(OUT_FILE).hex
+$(BUILD)/$(OUT_NAME)_nosd.hex: $(BUILD)/$(OUT_NAME).hex
 	@echo Create $(notdir $@)
 	@python3 tools/hexmerge.py --overlap=replace -o $@ $< $(MBR_HEX)
 
-# Bootolader only uf2
-$(BUILD)/$(OUT_FILE)-nosd.uf2: $(BUILD)/$(OUT_FILE)-nosd.hex
+# Bootolader self-update uf2
+$(BUILD)/update-$(OUT_NAME)_nosd.uf2: $(BUILD)/$(OUT_NAME)_nosd.hex
 	@echo Create $(notdir $@)
 	@python3 lib/uf2/utils/uf2conv.py -f 0xd663823c -c -o $@ $^
 
 # merge bootloader and sd hex together
-$(BUILD)/$(MERGED_FILE).hex: $(BUILD)/$(OUT_FILE).hex
+$(BUILD)/$(MERGED_FILE).hex: $(BUILD)/$(OUT_NAME).hex
 	@echo Create $(notdir $@)
 	@python3 tools/hexmerge.py -o $@ $< $(SD_HEX)
 
 # Create pkg zip file for bootloader+SD combo to use with DFU CDC
-$(BUILD)/$(MERGED_FILE).zip: $(BUILD)/$(OUT_FILE).hex
+$(BUILD)/$(MERGED_FILE).zip: $(BUILD)/$(OUT_NAME).hex
 	@$(NRFUTIL) dfu genpkg --dev-type 0x0052 --dev-revision $(DFU_DEV_REV) --bootloader $< --softdevice $(SD_HEX) $@
 
+#-------------- Artifacts --------------
+$(BIN):
+	@$(MKDIR) -p $@
+
+copy-artifact: $(BIN)
+	@$(CP) $(BUILD)/update-$(OUT_NAME)_nosd.uf2 $(BIN)
+	@$(CP) $(BUILD)/$(MERGED_FILE).hex $(BIN)
+	@$(CP) $(BUILD)/$(MERGED_FILE).zip $(BIN)
+
 #------------------- Flash target -------------------
 
 check_defined = \
@@ -402,7 +414,7 @@ __check_defined = \
     $(error Undefined make flag: $1$(if $2, ($2))))
 
 # Flash the compiled
-flash: $(BUILD)/$(OUT_FILE)-nosd.hex
+flash: $(BUILD)/$(OUT_NAME)_nosd.hex
 	@echo Flashing: $(notdir $<)
 	$(call FLASH_CMD,$<)
 
@@ -433,5 +445,5 @@ gdbflash: $(BUILD)/$(MERGED_FILE).hex
 	@echo Flashing: $<
 	@$(GDB_BMP) -nx --batch -ex 'load $<' -ex 'compare-sections' -ex 'kill'
 
-gdb: $(BUILD)/$(OUT_FILE).out
+gdb: $(BUILD)/$(OUT_NAME).out
 	$(GDB_BMP) $<
diff --git a/changelog.md b/changelog.md
index 50f7e53..a76bebe 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,16 @@
 # Adafruit nRF52 Bootloader Changelog
 
+## 0.4.0 - 2021.01.19
+
+- Decouple bootloader and softdevice i.e bootloader will always work with and/or without softdevice present. This allows application to pack firmware + softdevice into an uf2/serial for DFU.
+- Add self-update feature with update-{board}.uf2. This allow bootloader to update itself easily (requires running bootloader with at least 0.4.0)
+- Enlarge the fake FAT disk to ~ 32MB to allow piggy-pack multiple application (different family ID) within the same uf2.
+- Support uf2 with family ID = vendor ID + product ID
+- Reset into application if there is no USB connection in ~3 seconds.
+- Remove DFU idle 300 seconds timeout
+- Support power supply configuration with `ENABLE_DCDC_0` and `ENABLE_DCDC_1`
+- Add new boards support: nice nano, bast ble, ikigaisense vita, nrf52840 M2, Pitaya Go, AE-BL652-BO, BlueMicro, ADM_B_NRF52840_1
+
 ## 0.3.2 - 2020.03.12
 
 - Make sure all pins are in reset state when jumping to app mode.
diff --git a/src/usb/uf2/ghostfat.c b/src/usb/uf2/ghostfat.c
index 0f50acb..21cd264 100644
--- a/src/usb/uf2/ghostfat.c
+++ b/src/usb/uf2/ghostfat.c
@@ -391,8 +391,8 @@ int write_block (uint32_t block_no, uint8_t *data, WriteState *state)
   switch ( bl->familyID )
   {
 
-    case CFG_UF2_BOARD_APP_ID:  // board-specific app ... may not be usable on other nrf52 boards
-    case CFG_UF2_FAMILY_APP_ID: // legacy, or where app uses bootloader configuration to discover pins
+    case CFG_UF2_BOARD_APP_ID:  // board-specific app
+    case CFG_UF2_FAMILY_APP_ID: // family app
       /* Upgrading Application
        *
        * SoftDevice is considered as part of application and can be (or not) included in uf2.
@@ -430,9 +430,7 @@ int write_block (uint32_t block_no, uint8_t *data, WriteState *state)
       /* Upgrading Bootloader
        *
        * - For simplicity, the Bootloader Start Address is fixed for now.
-       *
        * - Since SoftDevice is not part of Bootloader, it MUST NOT be included as part of uf2 file.
-       *
        * - To prevent corruption/disconnection while transferring we don't directly write over Bootloader.
        * Instead it is written to highest possible address in Application region. Once everything is received
        * and verified, it is safely activated using MBR COPY BL command.
@@ -516,7 +514,7 @@ int write_block (uint32_t block_no, uint8_t *data, WriteState *state)
               }
               else
               {
-                PRINTF("DOES NOT mismatches our VID/PID\r\n");
+                PRINTF("DOES NOT match our VID/PID\r\n");
                 state->aborted = true;
                 return -1;
               }