EBYTE E106-915G27P2 LoRa Gateway RF Module User Manual

EBYTE E106-915G27P2 LoRa Gateway RF Module

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Overview

Brief introduction
E106-915G27P2 module is a LoRa gateway RF module designed based on the SX1302 chip. It adopts the standard Mini PCI-e package, SPI interface, the module has built-in PA and LNA, and the half-duplex design is convenient for users to quickly develop LoRa gateway equipment.
SX1302 is a new generation LoRa gateway baseband chip launched by Semtech. It is equipped with front-end SX1250 and can support spreading factors SF5~SF12. Compared with the previous generation SX1301 gateway solution, it can support higher-speed data communication, while the power consumption is greatly reduced, the design is simplified, and the performance is significantly improved.
Main features

• PCI Express Mini Card 1.2 standard interface;
• Sending current max 360mA, receiving current 60mA;
• I-PEX antenna interface, half-duplex communication;
• Standard SPI digital interface;
• Support 8 receiving channels, SF5~SF12 full solution, receiving sensitivity as low as -141dBm;
• Support 1 transmission channel, the maximum transmission power is 27dBm (typical value 26dBm);
• ISM band：EU433、CN470、EU868、US915.

**Block diagram

** Interface description

Interface definition

The signal interface of E106-915G27P2 is standard Mini PCI Express interface. The following table gives the function definition and description of the 52pin corresponding to the module.

Power interface

E106-915G27P2 module uses 3.3V power supply. In TX mode, the maximum instantaneous peak current may reach 400mA. In order to prevent voltage drop, the switch power supply or LDO used shall be able to provide enough current, and a tantalum capacitor or electrolytic capacitor with large capacitance value shall be added at the power supply port of the module. If switching power supply is used to supply power to the module, the circuit wiring shall avoid the antenna part as much as possible to prevent EMC interference.

SPI interface

The SPI interface signal definition of E106-915G27P2 module is shown in the following table. Table 5: SPI interface signal definition

Control signal

. PPS signal
Support GPS-PPS input for receiving data packets with time stamp.

NRESET signal
The external control circuit can realize the reset of the module. The module can be reset by pulling up the NRESET level by 0.05~0.2s then releasing it. The NRESET signal is relatively sensitive to interference, and the wiring on the
module interface board should be as short as possible, and should be processed by certain ground.
RX_ON signal
When the receiving state of the module is turned on, this pin outputs a high level, and the on-board LED lights up at the same time, and connects to the GPIO of the SX1302.
TX_ON signal
When the module is transmitting data, this pin outputs a high level, and the on-board LED lights up, and connects to the GPIO of the SX1302.
CFG_ON signal
When the module successfully configures the parameters, this pin outputs a high level and the on-board LED lights up, and connects to the GPIO of the SX1302.

Antenna interface

The antenna connection base of the module adopts I-PEX 1 generation

interface. Figure 3 shows the dimensions of the RF connector, in mm. Electrical and RF performance of the interface

Power characteristics

The E106-915G27P2 module is powered by 3.3V, the input voltage is 3.3V±9%, and the power input must meet the current supply capacity of at least 500mA. The module input current requirements are shown in the following table:

Item| Description| Min. Value| Typical value| Max. Value| Unit
---|---|---|---|---|---
VCC| Power supply voltage| 3.0| 3.3| 3.6| V

IO interface characteristics

The digital IO electrical characteristics of E106-915G27P2 module are shown in the table below. Table 8: IO interface electrical characteristics

Working current

RF performance

Receiving sensitivity (typical value dBm)
---|---|---

475.5MHz

| SF=5| -121
SF=7| -127
SF=12| -141

868.5MHz

| SF=5| -121
SF=7| -127
SF=12| -141

915.5MHz

| SF=05| -121
SF=07| -127
SF=12| -141

Dimensions

PCI Express mini card connectors that meet the standard can be used with this module, as shown in the following figure, MOLEX’s 679100002 connector.

Internal connection

The following figure is the internal connection diagram of E106-915G27P2 for reference.

Reference design

E106-915G27P2 uses SPI interface to connect with the main control chip, and uses DC-DC to supply power to the module, and users can modify it as needed.

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