3.1.2.2. Sensor extension module

3.1.2.2.1. Description

The Sensor extension board redirects the digital and analog pins of the Red Pitaya so that Groove sensors are easily connected. It also has the same pinout as Arduino shields.

Each Groove connector connects to the power (3V3), ground, and two digital or analog pins. As Red Pitaya only has four analog inputs, some pins overlap. You can control the connector pins and the sensors attached by reading data from either digital or analog pins.

Code examples of controlling the digital and analog inputs and outputs are available here.

Getting started with electronics is way more fun and engaging when you have loads of sensors you can use straight away. Whether you want to measure temperature, vibration, movement, etc., we have an extension module compatible with Grove modules from Seeed®. All you need to do is select the desired module, find the correct connector, and get going with your project.

Want to use an Arduino Uno shield? They can be plugged directly into the Sensor extension board. The extension module can also be powered from the external power supply using a micro USB cable.

A set of nine Jumpers can reconnect certain extension module connectors to different E1 or E2 pins or change power supply settings. For example, with J1 and J3, you can set the shield power source (VCC) to either an external power supply or get the power from Red Pitaya. A full schematic of the extension module is available below.

Note

The extension module is available for purchase from the Red Pitaya store.

3.1.2.2.2. Connectors and Jumpers

The black connectors on the sides are compatible with Arduino, the white connectors on the front provide analog inputs, and the two rows of beige connectors at the centre provide digital I/O, UART, I2C, or analog outputs. On the bottom, there are connectors to the Red Pitaya board.

3.1.2.2.2.1. Grove module connectors

These are dedicated connectors compatible with Grove modules.

There are six connector types available:

• AI Analog input (0 - 3.3 V)

• AO Analog output

• I2C (3.3 V)

• UART (3.3 V)

• DIO Digital input/output (3.3 V, not 5 V tolerant)

Connector	CN0	CN1	CN2	CN3	CN4	CN5	CN6	CN7	CN8	CN9	CN10	CN11	CN12
Groove PinType	AI	AI	AI	AO	I2C	I2C	I2C	UART	DIO	DIO	DIO	DIO	DIO
1	AI0	AI1	AI2	AO0	SCL	SCL	SCL	RX	IO8	IO6	IO4	IO2	IO0
2	AI1	AI2	AI3	AO1	SDA	SDA	SDA	TX	IO9	IO7	IO5	IO3	IO1
3	VCC	VCC	VCC	VCC	VCC	VCC	VCC	VCC	VCC	VCC	VCC	VCC	VCC
4	GND	GND	GND	GND	GND	GND	GND	GND	GND	GND	GND	GND	GND

3.1.2.2.2.2. Arduino shield compatible connectors

This set of connectors is partially compatible with the Arduino shield connector.

Function	Pin	Comment
IO0	1	D[0]
IO1	2	D[1]
IO2	3	D[2]
IO3	4	D[3]
IO4	5	D[4]
IO5	6	D[5]
IO6	7	D[6]
IO7	8	D[7]

Function	Pin	Comment
IO8	1	D[8]
IO9	2	D[9]
IO10	3	D[10]
IO11	4	D[11]
IO12	5	D[12]
IO13	6	D[13]
GND	7
AREF	8	NC
SDA	9	I2C_SDA
SCL	0	I2C_SCL

Function	Pin	Comment
A6	1	NC
A7	2	NC
Reset	3	NC
+3.3 V	4
+5.0 V	5
GND	6
GND	7
+VIN	8	NC

3.1.2.2.2.3. Jumpers

Jumper Num	Output Pin	Position 1	Position 2
J1 | +5V_SEL		+5V_EXT	+5V (Red Pitaya)
J2 | VCC		+3V3_SEL	+5V_SEL
J3 | +3V3_SEL		+3V3 (Red Pitaya)	+3V3_LDO
J4 | IO13		SPI_SCK	DIO5_N
J5 | IO12		SPI_MISO	DIO4_N
J6 | IO11		SPI_MOSI	DIO3_N
J7 | IO6		SPI_CS	DIO2_N
J8 | IO1		UART_TX	DIO1_P
J9 | IO0		UART_RX	DIO0_P

3.1.2.2.3. Schematics

• Red_Pitaya_Sensor_Shield_Schematics.pdf.

3.1.2.2.4. Examples of Groove Sensor

3.1.2.2.4.1. Sensors

Sensor information	Connector
Analog
Temperature sensor	AI
Motion sensor	DIO
Touch sensor	DIO
Button	DIO
Switch	DIO
Digital
Tilt	DIO
Potentiometer	AI
Light sensor	AI
Air quality sensor	AI
Vibration sensor	AI
Moisture sensor	AI
Water sensor	AI
Alcohol sensor	AI
Barometer not supported at the moment	I2C
Sound sensor	AI
UV sensor	AI
Accelerometer not supported at the moment	I2C

Actuators	Connector
Relay	DIO

Indicators	Connector
Buzzer	DIO
LED	DIO
7 segment display	Digital pins
LED bar	Digital pins
Groove LCD	Digital pins
LCD	Digital pins

3.1.2.2.5. Code Examples

Example code of how to control the sensors is available here:

• Sensor code examples