diff --git a/.github/workflows/githubci.yml b/.github/workflows/githubci.yml
index 68b4f7f..2cec1cd 100644
--- a/.github/workflows/githubci.yml
+++ b/.github/workflows/githubci.yml
@@ -2,7 +2,6 @@ name: Build
 
 on:
   pull_request:
-  push:
   repository_dispatch:
   release:
     types:
@@ -21,7 +20,8 @@ jobs:
         id: set-matrix
         working-directory: src/boards
         run: |
-          MATRIX_JSON=$(ls -d */ | sed 's/\/$//' | jq -R -s -c 'split("\n")[:-1]')
+          #MATRIX_JSON=$(ls -d */ | sed 's/\/$//' | jq -R -s -c 'split("\n")[:-1]')
+          MATRIX_JSON=$(ls -d promicro_nrf52840 | sed 's/\/$//' | jq -R -s -c 'split("\n")[:-1]')
           echo "matrix=$MATRIX_JSON"
           echo "matrix=$MATRIX_JSON" >> $GITHUB_OUTPUT
 
@@ -50,8 +50,10 @@ jobs:
 
     - name: Build
       run: |
-        make BOARD=${{ matrix.board }} all
-        make BOARD=${{ matrix.board }} copy-artifact
+        make BOARD=promicro_nrf52840 all
+        make BOARD=promicro_nrf52840 copy-artifact
+#        make BOARD=${{ matrix.board }} all
+#        make BOARD=${{ matrix.board }} copy-artifact
 
     - uses: actions/upload-artifact@v4
       with:
@@ -60,9 +62,8 @@ jobs:
 
     - name: Upload Release Asset
       uses: softprops/action-gh-release@v1
-      if: ${{ github.event_name == 'release' }}
       with:
         files: |
-          _bin/${{ matrix.board }}/${{ matrix.board }}_bootloader-*.zip
-          _bin/${{ matrix.board }}/${{ matrix.board }}_bootloader-*.hex
-          _bin/${{ matrix.board }}/update-${{ matrix.board }}_bootloader-*.uf2
+          _bin/promicro_nrf52840/promicro_nrf52840_bootloader-*.zip
+          _bin/promicro_nrf52840/promicro_nrf52840_bootloader-*.hex
+          _bin/promicro_nrf52840/update-promicro_nrf52840_bootloader-*.uf2
diff --git a/src/boards/promicro_nrf52840/board.h b/src/boards/promicro_nrf52840/board.h
new file mode 100644
index 0000000..dca466f
--- /dev/null
+++ b/src/boards/promicro_nrf52840/board.h
@@ -0,0 +1,65 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Nick Winans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef _PROMICRO_NRF52840_H
+#define _PROMICRO_NRF52840_H
+
+#define _PINNUM(port, pin)    ((port)*32 + (pin))
+
+#define UICR_REGOUT0_VALUE UICR_REGOUT0_VOUT_3V3
+
+/*------------------------------------------------------------------*/
+/* LED
+ *------------------------------------------------------------------*/
+#define LEDS_NUMBER       1
+#define LED_PRIMARY_PIN   _PINNUM(0, 15) // Blue
+#define LED_STATE_ON      1
+
+/*------------------------------------------------------------------*/
+/* BUTTON
+ *------------------------------------------------------------------*/
+#define BUTTONS_NUMBER    2  // none connected at all
+#define BUTTON_1          _PINNUM(0, 18)  // unusable: RESET
+#define BUTTON_2          _PINNUM(0, 19)  // no connection
+#define BUTTON_PULL       NRF_GPIO_PIN_PULLUP
+
+//--------------------------------------------------------------------+
+// BLE OTA
+//--------------------------------------------------------------------+
+#define BLEDIS_MANUFACTURER  "Nologo"
+#define BLEDIS_MODEL         "ProMicro NRF52840"
+
+//--------------------------------------------------------------------+
+// USB
+//--------------------------------------------------------------------+
+#define USB_DESC_VID           0x239A
+#define USB_DESC_UF2_PID       0x00B3
+#define USB_DESC_CDC_ONLY_PID  0x00B3
+
+#define UF2_PRODUCT_NAME  "ProMicro NRF52840"
+#define UF2_VOLUME_LABEL  "PROMICRO"
+#define UF2_BOARD_ID      "nRF52840-promicro"
+#define UF2_INDEX_URL     "https://www.nologo.tech/product/otherboard/NRF52840.html"
+
+#endif // _PROMICRO_NRF52840_H
diff --git a/src/boards/promicro_nrf52840/board.mk b/src/boards/promicro_nrf52840/board.mk
new file mode 100644
index 0000000..9d29ac6
--- /dev/null
+++ b/src/boards/promicro_nrf52840/board.mk
@@ -0,0 +1 @@
+MCU_SUB_VARIANT = nrf52840
diff --git a/src/boards/promicro_nrf52840/pinconfig.c b/src/boards/promicro_nrf52840/pinconfig.c
new file mode 100644
index 0000000..a983e4a
--- /dev/null
+++ b/src/boards/promicro_nrf52840/pinconfig.c
@@ -0,0 +1,19 @@
+#include "boards.h"
+#include "uf2/configkeys.h"
+
+__attribute__((used, section(".bootloaderConfig")))
+const uint32_t bootloaderConfig[] =
+{
+  /* CF2 START */
+  CFG_MAGIC0, CFG_MAGIC1,                       // magic
+  5, 100,                                       // used entries, total entries
+
+  204, 0x100000,                                // FLASH_BYTES = 0x100000
+  205, 0x40000,                                 // RAM_BYTES = 0x40000
+  208, (USB_DESC_VID << 16) | USB_DESC_UF2_PID, // BOOTLOADER_BOARD_ID = USB VID+PID, used for verification when updating bootloader via uf2
+  209, 0xada52840,                              // UF2_FAMILY = 0xada52840
+  210, 0x20,                                    // PINS_PORT_SIZE = PA_32
+
+  0, 0, 0, 0, 0, 0, 0, 0
+  /* CF2 END */
+};