Ebyte E22-900M22S Bedienungsanleitung

E22-900M22S User Manual

SX1262 868/915MHz SPI SMD LoRa Module

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900M22S User manual

Contents

1. Overview.............................................................................................................................................................................1

1.1 Introduction...............................................................................................................................................................2

1.2 Features.....................................................................................................................................................................2

1.3 Application................................................................................................................................................................3

2. Specification and parameter................................................................................................................................................3

2.1 Limit parameter.........................................................................................................................................................3

2.2 Operating parameter................................................................................................................................................. 3

3. Size and pin definition........................................................................................................................................................ 5

4. Basic Operation...................................................................................................................................................................6

4.1 Hardware Design...................................................................................................................................................... 6

4.2 Software Programming............................................................................................................................................. 7

5. FAQ.....................................................................................................................................................................................8

5.1 Communication range is too short............................................................................................................................ 8

5.2 Module is easy to damage.........................................................................................................................................8

5.3 High bit error rate..................................................................................................................................................... 8

6. Welding operation guidance................................................................................................................................................9

6.1 Reflow Soldering Temperature................................................................................................................................. 9

6.2 Reflow Soldering Curve......................................................................................................................................... 10

7. Related Model...................................................................................................................................................................10

8.1 Antenna recommendation....................................................................................................................................... 11

9. Batch packaging................................................................................................................................................................12

Revision history.................................................................................................................................................................... 12

About us................................................................................................................................................................................12

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900M22S User manual

Disclaimer

EBYTE reserves all rights to this document and the information contained herein.

Products, names, logos and designs described herein may in whole or in part be

subject to intellectual property rights. Reproduction, use, modification or disclosure to

third parties of this document or any part thereof without the express permission of

EBYTE is strictly prohibited.

The information contained herein is provided “as is” and EBYTE assumes no

liability for the use of the information. No warranty, either express or implied, is given,

including but not limited, with respect to the accuracy, correctness, reliability and

fitness for a particular purpose of the information. This document may be revised by

EBYTE at any time. For most recent documents, visit www.ebyte.com.

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900M22S User manual

1. Overview

1.1 Introduction

The E22-900M22S is based on the SX1262, a new generation of LoRaTM

RF chip manufactured by Semtech, USA. It is an ultra-small and self-developed

868MHz, 915MHz SMD LoRaTM wireless module.

Because it adopted the original SX1262 as main core, so the anti-interference performance and communication

distance have been further improved compared to the previous generation LoRaTM transceiver.Due to its new LoRaTM

modulation technology, the anti-interference performance and communication distance are far superior to the current

FSK and GFSK modulation products. This module is mainly for smart home, wireless meter reading, scientific and

medical research, and long distance wireless communication equipment. The RF performance and components selection

are all in accordance with industrial-grade standards and this products obtained FCC, CE and RoHS certification already

and so users do not need to worry about the performance. Adopted industrial grade high precision 32MHz crystal, the

product can cover an ultra-wide frequency range of 850~930MHz and is backward compatible with SX1278 and

SX1276.

Since the module is a RF transceiver module only, users need to use the MCU driver or use a dedicated SPI debug tool.

1.2 Features

Communication distance tested is up to 7km；

Maximum transmission power of 160mW, software multi-level adjustable；

Support the global license-free ISM 868/915MHz band；

Support air date rate of 0.018-62.5kbps in the LoRaTM mode；

Support 300kpbs in the FSK mode;

Compatible with the transceiver of SX1278/SX1276;

With large capacity, FIFO supports 256Byte data cache.;

New SF5 spreading factor to support dense networks;

Support 2.5V~3.7V power supply, more than 3.3V power supply can guarantee the best performance;

Industrial grade standard design, support -40 ~ 85 °C for working over a long time；

IPEX and stamp hole are optional, which is convenient for secondary development and integration.

The E22-900M22S passes the FCC&CE&ROHS certification.

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900M22S User manual

1.3 Application

Home security alarm and remote keyless entry；

Smart home and industrial sensors；

Wireless alarm security system；

Building automation solutions；

Wireless industrial-grade remote control；

Health care products；

Advanced Meter Reading Architecture(AMI)；

Automotive industry applications.

2. Specification and parameter

2.1 Limit parameter

Main parameter

Performance

Remark

Min.

Max.

Power supply（V）

3.7

Voltage over 3.7V will cause permanent

damage to module

Blocking power（dBm）

Chances of burn is slim when modules

are used in short distance

Operating temperature（℃）

-40

2.2 Operating parameter

Main parameter

Performance

Remark

Min.

Typ.

Max.

Operating voltage（V）

1.8

3.3

3.7

It’s recommended to use 3.3V.

Communication level（V）

3.3

For 5V TTL, It is recommended to add level

conversion

Operating temperature（℃）

-40

Industrial design

Operating frequency（GHz）

850

868/915

930

Support ISM band

Power

consumption

TX current（mA）

119

Instant power consumption

RX current（mA）

6.8

Sleep current（nA）

180

Software is shut down

Max Tx power（dBm）

21.4

21.5

22.3

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900M22S User manual

Receiving sensitivity（dBm）

-144

-146

-147

Air data rate is 0.3kbps

Air data rate（bps）

0.6k

300k

Controlled via user’s programming

0.018k

62.5k

Controlled via user’s programming

Main parameter

Description

Remark

Distance for reference

7000m

Test condition：clear and open area, antenna gain: 5dBi，antenna

height: 2.5m，air data rate: 0.3kbps

FIFO

256Byte

Maximum length of single transmission

Crystal frequency

32MHz

Modulation

LoRa(recommended)

Package

SMD

Connector

1.27mm

Stamp hole

Communication interface

SPI

0-10Mbps

Size

20* 14*2.8 mm

Antenna

IPEX/IPEX

50 ohm impedance

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900M22S User manual

3. Size and pin definition

No.

Name

Direction

Function

GND

Ground wire, connected to the power reference ground

GND

Ground wire, connected to the power reference ground

GND

Ground wire, connected to the power reference ground

GND

Ground wire, connected to the power reference ground

GND

Ground wire, connected to the power reference ground

RXEN

Input

RF switch receiving control pin, connected to external microcontroller IO,

valid in high level

TXEN

Input

RF switch transmitting control pin, connected to external microcontroller IO

or DIO2, valid in high level

DIO2

Input/Output

Configurable universal IO port (see SX1262 manual for details)

VCC

Power supply, 1.8~3.7V(It is recommended to add external ceramic filter

capacitor)

GND

Ground wire, connected to the power reference ground

GND

Ground wire, connected to the power reference ground

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900M22S User manual

GND

Ground wire, connected to the power reference ground

DIO1

Input/Output

Configurable universal IO port (see SX1262 manual for details)

BUSY

Output

For status indication (see SX1262 manual for details)

NRST

Input

Chip reset trigger input pin, valid in low level

MISO

Output

SPI data output pin

MOSI

Input

SPI data output pin

SCK

Input

SPI data output pin

NSS

Input

Module chip select pin for starting an SPI communication

GND

Ground wire, connected to the power reference ground

ANT

Antenna interface, stamp hole (50 ohm characteristic impedance)

GND

Ground wire, connected to the power reference ground

4. Basic Operation

4.1 Hardware Design

Brief Connection between Module and Single Chip Microcomputer

The IO0、IO1、IO2、IO3 in MCU means the IO port of MCU.

DIO1、DIO2 is the normal IO port, which can be configured to multiple function. The DIO2 can

connect with TXEN，but not with the IO port of MCU. It’s used to control RF switch, see more details

in SX1262 datasheet. Also It can be floated when not in use.

The DIO3 is powered by a 32MHz TCXO crystal.

Ensure the good grounding, large area of paving, small the power supply ripple, the filter capacitor

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900M22S User manual

should be increased and as close as possible to the VCC and GND pins of module.

Note:

It is recommended to use DC stabilized power supply to supply power to the module. The power supply ripple

coefficient is as small as possible, and the module needs to be reliably grounded.

Please pay attention to the correct connection of the positive and negative poles of the power supply. If the reverse

connection is connected, the module may be permanently damaged.

Please check the power supply to ensure that between the recommended supply voltage, if exceeding the maximum,

the module will be permanently damaged.

Please check the stability of the power supply, the voltage can not be significantly frequent.

When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the

margin, and the whole machine is beneficial for long-term stable operation.

The module should be as far away as possible from the power supply, transformers, high-frequency wiring and other

parts with large electromagnetic interference.

High-frequency digital traces, high-frequency analog traces, and power traces must be avoided under the module. If

it is necessary to pass through the module, assume that the module is soldered to the Top Layer, and the copper is

spread on the Top Layer of the module contact part(All copper-covered and well grounded), and must be close to

the digital part of the module and routed in the Bottom Layer.

Assuming the module is soldered or placed in the Top Layer, it is also wrong to randomly route the Bottom Layer or

other layers, which will affect the module's spurs and receiving sensitivity to varying degrees.

Assume that there are traces with large electromagnetic interference around the module (high-frequency digital,

high-frequency analog, power trace), which will greatly affect the performance of the module. It is recommended to

stay away from the module according to the strength of the interference. If necessary, appropriate isolation and

shielding can be done;

If the communication line uses a 5V level, a 1k-5.1k resistor must be connected in series (not recommended, there is

still a risk of damage).

Try to stay away from some physical layers and also have a 2.4GHz TTL protocol, for example: USB3.0

The antenna mounting structure has a great influence on the performance of the module. It is necessary to ensure

that the antenna is exposed, preferably vertically upward. When the module is mounted inside the case, use a good

antenna extension cable to extend the antenna to the outside of the case.

The antenna must not be installed inside the metal case, which will greatly reduce the transmission distance.

It is recommended to add a 200R protection resistor to the RXD/TXD of the external MCU.

4.2 Software Programming

Its driving mode is exactly the same as SX1268/SX1262. Users can operate according to SX1268/SX1262 chip

datasheet.

DIO1 and DIO2 are general-purpose IO ports, which can be configured into multiple functions. DIO2 can be

connected to TXEN and not connected to the MCU's IO port. It can be used to control the RF switch transmission.

If not used, you can hang it. For details, see the SX1262 manual.

DIO 3 is used to supply 32 MHz TCXO crystal oscillator.

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900M22S User manual

5. FAQ

5.1 Communication range is too short

The communication distance will be affected when obstacle exists.

Data lose rate will be affected by temperature, humidity and co-channel interference.

The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing near ground.

Sea water has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea.

The signal will be affected when the antenna is near metal object or put in a metal case.

Power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the shorter the

distance).

When the power supply at room temperature is lower than the recommended low voltage, the lower the voltage is,

the lower the transmitting power is.

Due to antenna quality or poor matching between antenna and module.

5.2 Module is easy to damage

Please check the power supply and ensure it is within the recommended range. Voltage higher than the peak will

lead to a permanent damage to the module.

Please check the stability of power supply and ensure the voltage not to fluctuate too much.

Please make sure anti-static measures are taken when installing and using, high frequency devices have electrostatic

susceptibility.

Please ensure the humidity is within limited range for some parts are sensitive to humidity.

Please avoid using modules under too high or too low temperature.

5.3 High bit error rate

There are co-channel signal interference nearby, keep away from interference sources or modify frequency, channel

to avoid interference.

The clock waveform on the SPI is not standard. Check whether there is interference on the SPI line. The SPI bus

line should not be too long.

Unsatisfactory power supply may also cause garbled characters, and ensure the reliability of the power supply.

If the extension cable or feeder is of poor quality or too long, the bit error rate will be high.

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