RAK7271/RAK7371 WisGate Developer Base Datasheet

Overview

Description

The RAK Developer Base is a device designed for integration with desktop/mobile/embedded systems that converts the RAK2287/RAK5146 mPCIe LoRa concentrator modules into USB Type C pluggable (via the include Type C to A cable).

This new approach allows for it to be easily integrated into existing hardware like routers, industrial PC, etc., adding LoRaWAN gateway capabilities (for example turning a laptop into a testbed LoRaWAN gateway by simply plugging it in and running the software stack)

As it features fully functioning concentrators modules it is capable of working with 8 uplink and 1 downlink channels at SF7-12 (RAK2287) / SF5-12 (RAK5146).

The RAK Developer Base is an ideal solution for LPWAN deployments where integration with existing hardware is crucial, or scenarios when on the go deployment is required, for drive testing or coverage evaluation in mobile scenarios.

This device is a complete and cost-efficient LoRa gateway solution offering up to 10 programmable parallel demodulation paths.

Features

• Compatible with RAK2287(SX1302) / RAK5146(SX1303) concentrator modules with 8 uplink channels and 1 downlink channel.
• 2 x SX125x Tx/Rx front-ends.
• Tx power up to 27 dBm, Rx sensitivity down to -139 dBm @ SF12, BW 125 kHz.
• Supports global license-free frequency band (EU433, CN470, IN865, EU868, US915, AU915, KR920, AS923)
• USB Type C interface port (USB 2.0)

Package Contents

• 1pc RAK Developer Base
• 1pc USB Type C to A Cable
• 1pc LoRa Antenna (2.3 dBi)

Figure 1: Package Contents

Specifications

Overview

The RAK7271/RAK7371 WisGate Developer Base consists of four components:

1. RAK2005
2. RAK2287/RAK5146
3. iPEX to RP-SMA female cable
4. Casing

Block Diagram

Figure 1: WisGate Developer Base Block Diagram

Hardware

The hardware specification covers the interfacing of WisGate Developer Base and its corresponding functionalities. It also presents the parameters and the standard values of the board.

Interfaces

Figure 1: WisGate Developer Base Interfaces

• Power supply: There is a 5 V to 3.3 V DC-DC converter integrated on RAK2005, so the 5 V DC that comes from the USB interface is enough for this device.
• USB Interface: This device can be connected to any USB 2.0 host equipped with compatible drivers. The RAK2287/RAK5146 module inside can support high-speed USB to SPI by STM32L412KBU6. It includes a USB 2.0 compliant interface with a maximum 480 Mb/s data rate, representing the interface for any communication with an external host application processor.
• RP-SMA antenna interface: The modules have one RF interface over a standard RPSMA connector with a characteristic impedance of 50 Ω. The RF port supports both Tx and Rx, providing the antenna interface.

RF Characteristics

Operating Frequencies

The WisGate Developer Base supports the LoRaWAN bands in the table below.

Region	Frequency (MHz)
China	CN470
Russia	RU864
India	IN865
Europe	EU433, EU868
North America	US915
Australia	AU915
Korea	KR920
Asia	AS923

LoRa RF Characteristics

It is highly recommended to use optimized RSSI calibration values, which is part of the HAL v3.1. For both, Radio 1 and 2, the RSSI-Offset should be set -169.0. The following table gives the typical sensitivity level of the RAK2287 and RAK5146.

Signal Bandwidth (kHz)	Spreading Factor	Sensitivity (dBm)
125	12	-139
125	7	-125
250	12	-136
250	7	-123
500	12	-134
500	7	-120

Antenna Specifications

LoRa Antenna

WisGate Developer Base comes with LoRa Antenna with RP-SMA Male connector, shown in Figure 4.

Figure 1: LoRa Antenna

Antenna Dimension

Figure 1: Antenna Dimension in mm

Antenna Parameters

Items	Specifications	Specifications
Frequency Range	863~870 MHz	902~928 MHz
Peak Gain	2.8 dBi	2.3 dBi
Voltage Standard Wave Ratio (VSWR)	≤ 1.5	≤ 1.5
Efficiency	> 80%	> 80%
Feed Impedance	50 Ω	50 Ω
Working Temperature & Humidity	T: -30~+75 ºC, H: 5~95%	T: -30~+75 ºC, H: 5~95%

Electrical Requirements

warning

Stressing the device above one or more of the ratings listed in the Absolute Maximum Rating section may cause permanent damage. These are stress ratings only. Operating the device at these or any conditions other than those specified in the Operating Conditions sections of the specification should be avoided. Exposure to Absolute Maximum Rating conditions for extended periods may affect the device’s reliability. The operating condition range defines those limits within which the functionality of the device is guaranteed. Where application information is given, it is advisory only and does not form part of the specification.

Absolute Maximum Rating

The limiting values given below are in accordance with the Absolute Maximum Rating System (IEC 134).

Symbol	Description	Condition	Min	Max
5V	Device supply voltage	Input DC voltage	–0.3 V	5.25 V
USB	USB D+/D- pins	Input DC voltage at USB interface pins		3.6 V
ANT	Antenna ruggedness	Output RF load mismatch ruggedness at ANT1		10:1 VSWR
Tstg	Storage Temperature		–40 °C	85 °C

NOTE

The product is not protected against overvoltage or reversed voltages. Voltage spikes exceeding the power supply voltage specification, given in the table above, must be limited to values within the specified boundaries by using appropriate protection devices.

Maximum ESD

Parameter	Min	Typical	Max	Remarks
ESD		±4 KV		Indirect Discharge VCP according to IEC 61000-4-2
ESD		±4 KV		Indirect Discharge HCP according to IEC 61000-4-2

Operating Conditions

Parameter	Min	Typical	Max
Operating temperature	–40 °C	+25 °C	+85 °C

warning

Unless indicated otherwise, all operating condition specifications are at an ambient temperature of 25 °C. Operation beyond the operating conditions is not recommended and extended exposure may affect the device's reliability.

Power Supply Range

Symbol	Parameter	Min	Typical	Max
5 V	Device supply operating input voltage	4.75 V	5 V	5.25 V

Power Consumption

Mode	Condition	Min	Typical	Max
Active Mode (TX)	The power of TX channel is 27 dBm and 5 V supply.		365 mA
Active Mode (RX)	TX disabled and RX enabled.		66 mA

Environmental Characteristics

Parameter	Min	Typical	Max
Operation Temperature Range	-40 °C	+25 °C	+85 °C

warning

Unless indicated otherwise, all operating condition specifications are at an ambient temperature of 25 °C. Operation beyond the operating conditions is not recommended and extended exposure may affect the device's reliability.

Mechanical Characteristics

Figure 1: WisGate Developer Base Dimension

Models / Bundles

Product	Concentrator	GPS	LBT	USB
RAK7271-Y	RAK2287			√
RAK7371-Y	RAK5146			√

Parameter	Variations
Y - Supported Region	1 - EU433; 2 - CN470; 3 - EU868; 4 - US915; 5 - KR920; 6 - AS923; 7 - IN865; 8 - AU915

Certification

CE Certification

FCC Certification

REACH Certification

RoHS Certification