diff --git a/configs/generic_duplex_usb.h b/configs/generic_duplex_usb.h
new file mode 100644
index 0000000..1a5a05d
--- /dev/null
+++ b/configs/generic_duplex_usb.h
@@ -0,0 +1,111 @@
+/*
+ *   Copyright (C) 2017,2018,2019 by Andy Uribe CA6JAU
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#if !defined(CONFIG_H)
+#define  CONFIG_H
+
+// Select one board (STM32F103 based boards)
+// 1) ZUMspot RPi or ZUMspot USB:
+// #define ZUMSPOT_ADF7021
+// 2) Libre Kit board or any homebrew hotspot with modified RF7021SE and Blue Pill STM32F103:
+#define LIBRE_KIT_ADF7021
+// 3) MMDVM_HS_Hat revisions 1.1, 1.2 and 1.4 (DB9MAT & DF2ET)
+// #define MMDVM_HS_HAT_REV12
+// 4) MMDVM_HS_Dual_Hat revisions 1.0 (DB9MAT & DF2ET & DO7EN)
+// #define MMDVM_HS_DUAL_HAT_REV10
+// 5) Nano hotSPOT (BI7JTA)
+// #define NANO_HOTSPOT
+// 6) NanoDV NPi or USB revisions 1.0 (BG4TGO & BG5HHP)
+// #define NANO_DV_REV10
+// 7) D2RG MMDVM_HS RPi (BG3MDO, VE2GZI, CA6JAU)
+// #define D2RG_MMDVM_HS
+
+// Enable ADF7021 support:
+#define ENABLE_ADF7021
+
+// Enable full duplex support with dual ADF7021 (valid for homebrew hotspots only):
+#define DUPLEX
+
+// TCXO of the ADF7021
+// For 14.7456 MHz:
+#define ADF7021_14_7456
+// For 12.2880 MHz:
+// #define ADF7021_12_2880
+
+// Configure receiver gain for ADF7021
+// AGC automatic, default settings:
+#define AD7021_GAIN_AUTO
+// AGC automatic with high LNA linearity:
+// #define AD7021_GAIN_AUTO_LIN
+// AGC OFF, lowest gain: 
+// #define AD7021_GAIN_LOW
+// AGC OFF, highest gain:
+// #define AD7021_GAIN_HIGH
+
+// Host communication selection:
+// #define STM32_USART1_HOST
+#define STM32_USB_HOST
+// #define STM32_I2C_HOST
+
+// I2C host address:
+#define I2C_ADDR 0x22
+
+// Enable mode detection:
+#define ENABLE_SCAN_MODE
+
+// Send RSSI value:
+// #define SEND_RSSI_DATA
+
+// Enable Nextion LCD serial port repeater on USART2 (ZUMspot Libre Kit and ZUMspot RPi):
+#define SERIAL_REPEATER
+#define SERIAL_REPEATER_BAUD 9600
+
+// Enable Nextion LCD serial port repeater on USART1 (Do not use with STM32_USART1_HOST enabled):
+// #define SERIAL_REPEATER_USART1
+
+// Enable P25 Wide modulation:
+// #define ENABLE_P25_WIDE
+
+// Disable mode LEDs blink during scan mode:
+// #define QUIET_MODE_LEDS
+
+// Engage a constant or descreet Service LED mode once repeater is running 
+// #define CONSTANT_SRV_LED
+// #define CONSTANT_SRV_LED_INVERTED
+// #define DISCREET_SRV_LED
+// #define DISCREET_SRV_LED_INVERTED
+
+// Use the YSF and P25 LEDs for NXDN
+// #define USE_ALTERNATE_NXDN_LEDS
+
+// Use the D-Star and DMR LEDs for POCSAG
+// #define USE_ALTERNATE_POCSAG_LEDS
+
+// Enable for RPi 3B+, USB mode
+#define LONG_USB_RESET
+
+// Enable modem debug messages
+// #define ENABLE_DEBUG
+
+// Disable frequency bands check
+// #define DISABLE_FREQ_CHECK
+
+// Disable frequency restrictions (satellite, ISS, etc)
+// #define DISABLE_FREQ_BAN
+
+#endif
diff --git a/scripts/build_fw.sh b/scripts/build_fw.sh
index 6729d12..4ea323e 100755
--- a/scripts/build_fw.sh
+++ b/scripts/build_fw.sh
@@ -158,4 +158,13 @@ make
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/generic_duplex_gpio_fw.bin
 make clean
 
+# Building Generic Duplex USB
+echo "********************************************************"
+echo "********* Building Generic Duplex USB firmware *********"
+echo "********************************************************"
+cp ~/MMDVM_HS/configs/generic_duplex_usb.h ~/MMDVM_HS/Config.h
+make bl
+mv ~/MMDVM_HS/bin/mmdvm_f1bl.bin ~/MMDVM_HS/bin/generic_duplex_usb_fw.bin
+make clean
+
 cp ~/MMDVM_HS/configs/ZUMspot_Libre.h ~/MMDVM_HS/Config.h