Gravity: IO Expansion HAT for Raspberry Pi

This IO Expansion HAT from DFRobot is the perfect prototyping companion for your Raspberry Pi 4. It breaks out all of the IO ports on Raspberry Pi including digital ports, analog ports, PWM, I2C, UART, SPI and IIS - ready for use to use with sensors and other components.

The HAT is also compatible with DFRobot Gravity Series modules, which frees users from complicated connection work and enables them to just concentrate on building their projects.

The Raspberry Pi GPIO pins work with a maximum logic level of 3.3V. Apart from 3.3V modules, the HAT also supports:

• Sensor and module with 5V power supply and 3.3V level
• PWM external power supply (6~12V)
• Controlling multiple servos

Specifications

• Operating Voltage: 5V
• PWM Port External Power: 6-12V
• Sensor Interface External Power: 3.3V
• BCM pin labels
• Dimension: 65 x 56 mm
• Compatible with all 40-pin Raspberry Pi boards

Resources

• Product wiki

Package Contents

1x Gravity: IO Expansion HAT for Raspberry Pi

Pinout

PCB	Label	Description
+	+	3.3V Positive
-	-	Negative
⊕	⊕	Binding post connect to external power positive
㊀	㊀	Binding post connect to external power negative
Digital	0-27	Raspberry Pi GPIO0-GPIO27
PWM	0-3	PWM signal output pin 0-3
Analog	0-3	Analog signal input pin 0-3
IIC	C	IIC port clock line
	D	IIC port data line
UART	T	UART Transmit port
	R	UART Receive port
5V	5V	5V positive
GND	GND	Negative
IIS	SCK	IIS serial clock line
	DIN	IIS serial data input
	LCK	IIS L/R channel selection line
	BCK	IIS system clock line
SPI	MISO	SPI data output line
	SS	SPI enable pin
	SCLK	SPI serial clock line
	MOSI	SPI data input line