RAK14008 WisBlock Gesture Sensor Module Datasheet

Overview

Description

RAK14008 is a gesture sensor module based on PAJ7620U2. It is designed for gesture recognition applications with an I2C digital interface. It can recognize nine (9) human hand gesticulations such as moving up, down, left, right, forward, backward, circle-clockwise, circle-counter clockwise, and waving. It also offers built-in proximity detection in sensing approaching or departing objects from the sensor.

Features

• Gesture speed:
  • 60-600 °/s in Normal Mode
  • 60-1200 °/s in Gaming Mode
• On-board low noise high PSRR voltage regulator
• Flexible power saving scheme
• I2C interface up to 400 Kbit/s
• Ambient light immunity
• Ambient light noise cancellation
• VBAT：3.2-5.5 V
• VCC：2.8-3.3 V
• Chipset: PixArt Imaging PAJ7620U2
• Operating Temperature: -40° C ~ 85° C
• Storage Temperature :-40° C ~ 125° C
• Module size: 25 X 15 mm

Specifications

Overview

Mounting

The RAK14008 WisBlock Gesture Sensor Module can be mounted to the IO slot of the WisBlock Base board. Figure 1 shows the mounting mechanism of the RAK14008 on a WisBlock Base module.

Figure 1: RAK14008 mounting mechanism on a WisBlock Base module

Hardware

The hardware specification is categorized into five (5) parts. It shows the chipset of the module and discusses the pinouts and their corresponding functions and diagrams. It also covers the electrical and mechanical characteristics that include the tabular data of the functionalities and standard values of the RAK14008 WisBlock Module.

Chipset

Vendor	Part number
PixArt Imaging	PAJ7620U2

Pin Definition

The RAK14008 WisBlock Gesture Sensor Module comprises a standard WisBlock connector. The WisBlock connector allows the RAK14008 module to be mounted to a WisBlock Base board. The pin order of the connector and the pinout definition is shown in Figure 2.

Figure 2: RAK14008 Pinout Diagram

NOTE

• Only I2C related pin, LDO_EN, INT_N, VBAT, 3V3_S, and GND are connected to the WisConnector.
• 3V3_S voltage output from the WisBlock Base that powers the RAK14008 module can be controlled by the WisBlock Core via WB_IO2 (WisBlock IO2 pin). This makes the module ideal for low-power IoT projects since the WisBlock Core can totally disconnect the power of the RAK14008 module.

Electrical Characteristics

This section shows the maximum and minimum ratings of the RAK14008 module and its recommended operating conditions. Refer to the table presented below.

Recommended Operating Conditions

Symbol	Description	Min.	Nom.	Max.	Unit
VBAT	MP20051 supply voltage	3.2	-	5.5	V
3V3_S	AJ7620U2 supply voltage	2.8	-	3.3	V

Mechanical Characteristics

Board Dimensions

The mechanical dimensions of the RAK14008 module are shown in Figure 3 below.

Figure 3: RAK14008 mechanical dimensions

WisConnector PCB Layout

Figure 4: WisConnector PCB footprint and recommendations

Schematic Diagram

Figure 5 shows the schematic of the RAK14008 module.

Figure 5: RAK14008 WisBlock Module schematic

VBAT to VLED

Figure 6: VBAT to VLED

PAJ7620U2 Related Circuits

R6 and R8 resistors already exist on the WisBlock Base board and are not mounted on the RAK14008 module.

Figure 7: PAJ7620U2 related circuits

Gesture Direction

Figure 8: RAK14008 default direction

The gesture result mapping table for up/down/right/left is shown in the table below:

Bank0_Rcg0x43	Bit[0]	Up	Left	Down	Right
Bank0_Rcg0x43	Bit[1]	Down	Right	Up	Left
Bank0_Rcg0x43	Bit[2]	Left	Down	Right	Up
Bank0_Rcg0x43	Bit[3]	Right	Up	Left	Down