diff --git a/config/generic-mellow-fly-gemini-v1.cfg b/config/generic-mellow-fly-gemini-v1.cfg
new file mode 100644
index 00000000..7441dae9
--- /dev/null
+++ b/config/generic-mellow-fly-gemini-v1.cfg
@@ -0,0 +1,157 @@
+# This file contains common pin mappings for the Mellow Fly-Gemini-v1.
+# To use this config, the firmware should be compiled for the
+# STM32F405 with a "32KiB bootloader".
+
+# The "make flash" command does not work on the Fly-Gemini-v1. Instead,
+# after running "make", copy the generated "out/klipper.bin" file to a
+# file named "firmware.bin" or "klipper.bin" on an SD card and then restart the Fly-Gemini-v1
+# with that SD card.
+
+# See docs/Config_Reference.md for a description of parameters.
+
+[stepper_x]
+step_pin: PC13
+dir_pin: PC1
+enable_pin: !PB2
+microsteps: 16
+rotation_distance: 40
+endstop_pin: ^PA3
+position_endstop: 0
+position_max: 200
+homing_speed: 50
+
+[stepper_y]
+step_pin: PC14
+dir_pin: !PC4
+enable_pin: !PB6
+microsteps: 16
+rotation_distance: 40
+endstop_pin: ^PB1
+position_endstop: 0
+position_max: 200
+homing_speed: 50
+
+[stepper_z]
+step_pin: PC15
+dir_pin: PC5
+enable_pin: !PB5
+microsteps: 16
+rotation_distance: 40
+endstop_pin: ^PB10
+position_endstop: 0.5
+position_max: 200
+
+[extruder]
+step_pin: PC3
+dir_pin: PC7
+enable_pin: !PB4
+microsteps: 16
+rotation_distance: 33.500
+nozzle_diameter: 0.400
+filament_diameter: 1.750
+heater_pin: PA0
+sensor_type: EPCOS 100K B57560G104F
+sensor_pin: PC0
+control: pid
+pid_Kp: 22.2
+pid_Ki: 1.08
+pid_Kd: 114
+min_temp: 0
+max_temp: 250
+
+[heater_bed]
+heater_pin: PA2
+sensor_type: Generic 3950
+sensor_pin: PC2
+control: watermark
+min_temp: 0
+max_temp: 130
+
+[fan]
+pin: PC6
+
+[mcu]
+serial: /dev/serial/by-id/usb-Klipper_Klipper_firmware_12345-if00
+
+[printer]
+kinematics: cartesian
+max_velocity: 300
+max_accel: 3000
+max_z_velocity: 5
+max_z_accel: 100
+
+
+########################################
+# TMC2209 configuration
+########################################
+
+#[tmc2209 stepper_x]
+#uart_pin: PB11
+#run_current: 0.800
+#diag_pin: PA3
+#stealthchop_threshold: 999999
+
+#[tmc2209 stepper_y]
+#uart_pin: PB9
+#run_current: 0.800
+#diag_pin: PB1
+#stealthchop_threshold: 999999
+
+#[tmc2209 stepper_z]
+#uart_pin: PB8
+#run_current: 0.800
+#diag_pin: PB10
+#stealthchop_threshold: 999999
+
+#[tmc2209 extruder]
+#uart_pin: PB7
+#run_current: 0.600
+#diag_pin:
+#stealthchop_threshold: 999999
+
+########################################
+# TMC5160 configuration
+########################################
+
+#[tmc5160 stepper_x]
+#cs_pin: PB11
+#spi_bus: spi1
+#run_current: 0.800
+#diag1_pin: PA3
+#stealthchop_threshold: 999999
+
+#[tmc5160 stepper_y]
+#cs_pin: PB9
+#spi_bus: spi1
+#run_current: 0.800
+#diag1_pin: PB1
+#stealthchop_threshold: 999999
+
+#[tmc5160 stepper_z]
+#cs_pin: PB8
+#spi_bus: spi1
+#run_current: 0.800
+#diag1_pin: PB10
+#stealthchop_threshold: 999999
+
+#[tmc5160 extruder]
+#cs_pin: PB7
+#spi_bus: spi1
+#run_current: 0.800
+#diag1_pin:
+#stealthchop_threshold: 999999
+
+########################################
+# EXP1 / EXP2 (display) pins
+########################################
+
+[board_pins]
+aliases:
+    # EXP1 header
+    EXP1_1=<NC>, EXP1_3=PA13,  EXP1_5=PA9,   EXP1_7=<NC>,  EXP1_9=<GND>,
+    EXP1_2=PA4,  EXP1_4=PA10,  EXP1_6=PA8,   EXP1_8=<NC>,  EXP1_10=<5V>,
+    # EXP2 header
+    EXP2_1=PB14, EXP2_3=PA15,  EXP2_5=PA14,  EXP2_7=PB3,   EXP2_9=<GND>,
+    EXP2_2=PB13, EXP2_4=PB12,  EXP2_6=PB15,  EXP2_8=<RST>, EXP2_10=<NC>,
+
+# See the sample-lcd.cfg file for definitions of common LCD displays.
diff --git a/test/configs/stm32f405.config b/test/configs/stm32f405.config
new file mode 100644
index 00000000..bd99c762
--- /dev/null
+++ b/test/configs/stm32f405.config
@@ -0,0 +1,3 @@
+# Base config file for STM32F405 ARM processor
+CONFIG_MACH_STM32=y
+CONFIG_MACH_STM32F405=y
diff --git a/test/klippy/printers.test b/test/klippy/printers.test
index 975569b9..2eed011e 100644
--- a/test/klippy/printers.test
+++ b/test/klippy/printers.test
@@ -177,6 +177,10 @@ CONFIG ../../config/printer-twotrees-sapphire-plus-sp-5-v1-2020.cfg
 CONFIG ../../config/printer-twotrees-sapphire-plus-sp-5-v1.1-2021.cfg
 CONFIG ../../config/printer-twotrees-sapphire-pro-sp-3-2020.cfg
 
+# Printers using the stm32f405
+DICTIONARY stm32f405.dict
+CONFIG ../../config/generic-mellow-fly-gemini-v1.cfg
+
 # Printers using the stm32f407
 DICTIONARY stm32f407.dict
 CONFIG ../../config/generic-bigtreetech-e3-rrf-v1.1.cfg