Cluster HAT v1.0

USB connector: On left (SMT)
Serial connector: TH
GPIO connector: Bottom entry + header
Power connector: 2 pin header (0.1")
Solder jumpers top: W_EN (Write protect EEPROM) / PWR (Power source USB or GPIO)
Solder jumpers bottom: None
USB Hub control: None

Cluster HAT v1.1

USB connector: On left (SMT+TH)
Serial connector: SMT
GPIO connector: Header
Power connector: None
Solder jumpers top: W_EN (Write protect EEPROM) / PWR (Power source USB or GPIO)
Solder jumpers bottom: None
USB Hub control: None

Cluster HAT v1.2

USB connector: On left (SMT+TH)
Serial connector: SMT
GPIO connector: Header
Power connector: None
Solder jumpers top: PWR (Power source USB or GPIO)
Solder jumpers bottom: None
USB Hub control: None

Cluster HAT v1.3

USB connector: On left (SMT+TH)
Serial connector: SMT
GPIO connector: Header
Power connector: SMT (underside)
Solder jumpers top: Bigger PWR (Power source USB or GPIO)
Solder jumpers bottom: None
USB Hub control: None

Cluster HAT v2.0

USB connector: Front (SMT+TH)
Serial connector: SMT
GPIO connector: Header
Power connector: SMT (underside)
Solder jumpers top: Bigger PWR (Power source USB or GPIO)
Solder jumpers bottom: WP (EEPROM Write protect - bridge to prevent writes) / POS (Power on state - cut to auto power on)
USB Hub control: Power
Pi4 Controller Reboot: Rebooting Pi4 controller will reset I2C expander powering off Pi Zeros (use 3v3 Sustain to fix)

Cluster HAT v2.1

Inrush current issue, not released.

Cluster HAT v2.2

USB connector: Front (SMT+TH)
Serial connector: SMT
GPIO connector: Header
Power connector: SMT (underside) / Front header for 3.5mm screw terminal
Solder jumpers top: Bigger PWR (GPIO or GPIO)
Solder jumpers bottom: WP (EEPROM Write protect - bridge to prevent writes) / POS (Power on state - cut to auto power on)
USB Hub control: Reset
Pi4 Controller Reboot: Rebooting Pi4 controller will reset I2C expander powering off Pi Zeros (use 3v3 Sustain to fix)

Cluster HAT v2.3

USB connector: Front (SMT+TH)
Serial connector: SMT
GPIO connector: Header
Power connector: SMT (underside) / Front header for 3.5mm screw terminal
Solder jumpers top: Bigger PWR (GPIO or GPIO)
Solder jumpers bottom: WP (EEPROM Write protect - bridge to prevent writes) / POS (Power on state - cut to auto power on)
USB Hub control: Reset
Pi4 Controller Reboot: Rebooting Pi4 controller will reset I2C expander powering off Pi Zeros (use 3v3 Sustain to fix)

Cluster HAT v2.4

USB connector: Front (SMT+TH)
Serial connector: SMT
GPIO connector: Header
Power connector: SMT (underside) / Front header for 3.5mm screw terminal
Solder jumpers top: Bigger PWR (GPIO or GPIO)
Solder jumpers bottom: WP (EEPROM Write protect - bridge to prevent writes) / POS (Power on state - cut to auto power on) / XA0 & XA1 I/O Expander I2C Address / EA0 & EA1 HAT EEPROM I2C Address
USB Hub control: Reset
Pi4 Controller Reboot: No issue.

Cluster HAT v2.5

USB connector: Front (SMT+TH)
Serial connector: SMT
GPIO connector: Header
Power connector: SMT (underside) / Front header for 3.5mm screw terminal
Fan connector: 5V 2-pin 2.54mm pitch unpopulated header (+5V closest to side of board) 200mA max.
Solder jumpers top: Bigger PWR (GPIO or GPIO)
Solder jumpers bottom: WP (EEPROM Write protect - bridge to prevent writes) / POS (Power on state - cut to auto power on) / XA0 & XA1 - I/O Expander I2C Address / EA0 & EA1 - HAT EEPROM I2C Address / ID_SDA & ID_SCL - HAT EEPROM cut both to disconnect
USB Hub control: Reset
Pi4 Controller Reboot: No issue.

Key: TH = Through Hole / SMT = Surface Mount