Ebyte E32-915T30S User Manual

E32-915T30S User Manual

SX1276 915MHz 1W SMD Wireless Module

Chengdu Ebyte Electronic Technology Co,;Ltd E32-915T30S user manual

CONTENT

1. OVERVIEW .............................................................................................................................. 3

1.1 INTRODUCTION................................................................................................................................................................................ 3

1.2 FEAT URES ......................................................................................................................................................................................... 3

2.SPECIFICATION AND PARAMETER ......................................................................................... 4

2.1 LIMIT PARAMETER .......................................................................................................................................................................... 4

2.2 OPERATING PARAMETER ................................................................................................................................................................ 4

3 SIZE AND PIN DEFINITION ......................................................................................................... 5

4 CONNECT TO MCU ....................................................................................................................... 7

5 FUNCTION DESCRIPTION .......................................................................................................... 7

5.1 FIXED TRANSMISSION..................................................................................................................................................................... 7

5.2 BROADCASTING TRANSMISSION ................................................................................................................................................... 8

5.6.1 Indication of UART output ................................................................................................................................................... 9

5.6.2 Indication of wireless transmitting ..................................................................................................................................... 9

5.6.3 Configuration procedure of module..................................................................................................................................10

5.6.4 Notes for AUX.......................................................................................................................................................................10

6 OPERATING MODE ..................................................................................................................... 11

6.1 MODE SWITCH ............................................................................................................................................................................... 11

6.2 NORMAL MODE (MODE 0) ............................................................................................................................................................ 12

6.3 WAKE-UP MODE (MODE 1)........................................................................................................................................................... 12

6.4 POWER-SAVING MODE (MODE 2)................................................................................................................................................. 12

6.5 SLEEP MODE (MODE 3) ................................................................................................................................................................. 13

7 COMMAND FORMAT .................................................................................................................. 13

7.1 DEFAULT PARAMETERS................................................................................................................................................................. 13

7.2 READING OP ERATING PARAMETERS............................................................................................................................................ 14

7.3 READING VERSION NUMBER ........................................................................................................................................................ 14

7.4 RESET COMMAND.......................................................................................................................................................................... 14

7.5 PARAMETER SETTING COMMAND ............................................................................................................................................... 14

8. HARDWARE DESIGN ................................................................................................................. 16

9 FAQ .................................................................................................................................................. 17

9.1 COMMUNICATION RANGE IS TOO SHORT .................................................................................................................................... 17

9.2 MODULE IS EASY TO DAMAGE..................................................................................................................................................... 18

9.3 BER(BIT ERROR RAT E) IS HIGH ............................................................................................................................................... 18

10 PRODUCTION GUIDANCE ...................................................................................................... 18

10.1 REFLOW SOLDERING TEMPERATURE ........................................................................................................................................ 18

10.2 REFLOW SOLDERING CURVE...................................................................................................................................................... 19

11 E32 SERIES................................................................................................................................... 19

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12 ANTENNA RECOMMENDATION ........................................................................................... 20

12.1 ANTENNA CHOOSING .............................................................................................................................................................. 20

13 PACKAGE FOR BATCH ORDER ............................................................................................. 21

REVISION HISTORY....................................................................................................................... 22

ABOUT US ......................................................................................................................................... 22

Chengdu Ebyte Electronic Technology Co,;Ltd E32-915T30S user manual

1. Overview

1.1 Introduction

E32-915T30S is a wireless serial port module

(UART) based on SEMTECH's SX1276 RF chip. It has

multiple trans miss ion modes, working in the

900MHz~931MHz, (default 915MHz), LoRa s pread

spectrum technology, TTL output, compatib le 3.3v~5v

IO.

SX1276 features LoRa™, wh ich will bring longer

communicat ion distance, and has the advantages of concentrated power density, meanwh ile it has a very s trong

confidentiality. the modules of 30dBm transmitting power adopt indus trial grade crys tal oscillators to ens ure the stability

and consis tency, its precision is lower than the widely adopted 10ppm.E32-915T30S is in stable bulk production and are

wide ly applied in utility meters, IoT renovation, smart ho me, etc. The modules feature data encryption and co mpression.

The data transmitted in air features randomness. air Data Rate (Default 2.4kps). The encryption -decryption algorithm

makes data interception meaningless . And the data compression enables shorter transmitting time and lower rate of be ing

interfered, which increased the reliability and transmitting efficiency.

E32-915T30S s trictly follows des ign standards of FCC, CE, CCC and meets various RF certificat ion requirements

for exporting.

1.2 Features

 Communication distance tested is up to 8km  Maximum transmiss ion power of 1W, software multi-level adjustable；  Support the global license -free ISM 915MHz band；  Support air date rate of 0.3kbps ～19.2kbps；  Support new generation LoRa technology.  Low power consumption for battery supplied applications ；  Support 3.3V~5.2V power supply, power supply over 5.0 V can guarantee the best performance；  Industrial grade standard des ign, s upport -40 ~ 85 °C for working over a long time；  IPEX and stamp hole optional, good for secondary development and integration.

1.3 Application

 Home s ecurity alarm and remote keyless entry；  Smart home and industrial sensors ；  Wireless alarm security system；

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 Building automation solutions ；  Wireless indus trial-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 sup p ly（V）

0

5.2

Voltage over 5.2V will cause permanent

damage to module

Blocking power（dBm）

-

-10

Chances of burn is slim when modules

are used in short distance

Operating temperature（℃）

-40

85

-

2.2 Operating parameter

Main parameter

Performance

Remark

Min

Typ.

Max.

Operating voltage（V）

3.3

5.0

5.2

≥5.0 V ensures outp ut power

Communication level（V）

-

3.3

-

For 5V TTL, it may be at risk of

burning down

Operating temperature（℃）

-40 - 85

Industrial design

Operating frequency（M Hz ）

900

915

931

Support ISM band

Power

consumption

Transmitting current [mA]

-

600 - Instant power consumption

Receiving current [mA]

-

21

-

Turn-off current [μA]

- 5 -

Software is shut down

Max Tx power（dBm）

29.5 - 30.5

-

Receiving sensitivity （dBm）

-145

-147

-148

Air data rate is 2.4kbps

Air data rate（bps）

0.3k

2.4k

19.2k

Controlled via user’s

programming

Main parameter

Description

Remark

Distance for reference

8000m

Test condition：clear and op en area, antenna gain: 5dBi， antenna height: 2.5m，air data rate: 2.4kbps

TX length

58 Byte

Maximum capacity of single package

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Buffer

512 Byte

-

Modulation

LoRa™

-

Communication interface

TTL

@3.3V

Package

SMT

-

Connector

2.54mm

-

Size

25 * 40.5 mm

-

Antenna

IPEX/stamp hole

50 ohm impedance

3 Size and pin definition

No.

Name

Direction

Function

1

M0

Input

（weak pull-up）

With M1, the four working modes of the module can be

determined (it cannot be suspended, and it can be grounded if it is not us ed).

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2

M1

Input

（weak pull-up）

With M0, the four working modes of the module can be

determined (it cannot be suspended, and it can be grounded if it is not us ed).

3

RXD

Input

TTL UART input , Connect to external TXD output pins; Can be

configured as drain open circuit or pull up input, see parameter Settings

4

TXD

Output

TTL UART output, Connect to external RXD input pin; Can be

configured as drain open circuit or push - pull output, see parameter Settings

5

AUX

Output

Used to indicate the working status of the module; T he user wakes up the external M CU and outputs low level during self-test initialization; Can be configured as drain op en output, or p ush-p ull outp ut, see parameter Settings (can be suspended)

6

VCC

Input

Positive reference of module power s upply, voltage range: 2.3v ~

5.2v DC

7

GND

Input

Ground

8

RESET

Input

Reset pins for program loading (dangling, no need for user to

connect)

9

GND

Input

Ground pins for program loading (dangling, no us er connection

required)

10

SWIM

Input

SWIM pin for program load (dangling, us er does not need to

connect)

11

+3.3V

Input

Power pins for program loading (suspended, no need for user to

connect)

12

PB3

Input/output

NC PINE, This pin needs to be dangling and the user does not

need to connect (for later extens ion use)

13

PB1

Input/output

NC PINE, This pin needs to be dangling and the us er does not

need to connect (for later extens ion use)

14

PB0

Input/output

NC PINE, This pin needs to be dangling and the user does not

need to connect (for later extens ion use)

15

GND

-

16

GND

-

17

GND

-

18

ANT

Output

Antenna interface (high frequency signal output,50 ohm

characteristic impedance)

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4 Connect to MCU

No.

Description（STM8L MCU）

1

The UART module is TTL level.

2

For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.

5 Function description

5.1 Fixed transmission

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5.2 Broadcasting transmission

5.3 Broadcasting address

 For example: Set the address of module A as 0xFFFF or 0x0000, and the channel as 0x04;  W hen module is the trans mitter (trans parent trans miss ion), all modules under channel 0x04 will receive the data, the

purpos e of broadcast is realized.

5.4 Monitor address

 For example: Set the address of module A as 0xFFFF or 0x0000, and the channel as 0x04;

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 W hen module A is the receive r, it can receive the data s ent from all modules under channel 0x04, the purpose of

monitor is realized.

5.5 Reset

 W hen the module is powered, AUX outputs low level immediately, conducts hardware s elf-check and sets the

operating mode based on user’s parameters. During the process, the AUX remains low level. After the proces s

completed, the AUX outputs high level and s tarts to work as per the operating mode combined by M1 and M0.

Therefore, us ers need to wait the AUX rising edge as the start of module’s normal work.

5.6 AUX description

 AUX Pin can be used as indication for wireless s end & receive buffer and self-check.  It can indicate whether there are data that are not sent yet via wireless way, or whether a ll wireless data has been

sent through UART, or whether the module is still in the process of self-check initialization.

5.6.1 Indication of UART output

 To wake up external MCU

5.6.2 Indication of wireless transmitting

 Buffer (empty): the internal 512 bytes data in the buffer are written to the RFIC (Auto sub -packaging).  W hen AUX=1, the user can input data less than 512 bytes continuously without overflow. Buffer (not empty): when

AUX=0, the internal 512 bytes data in the buffer have not been written to the RFIC completely. If the user starts to

trans mit data at this circumstance, it may cause overtime when the module is waiting for the user data, or

trans mitting wireless s ub package.

 W hen AUX = 1, it does not mean that all the UART data of the module have been transmitted already, perhaps the

last packet of data is still in transmission.

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5.6.3 Configuration procedure of module

 Only happened when power-on resetting or exiting s leep mode

5.6.4 Notes for AUX

No.

Description

1

For function 1 & function 2 mentioned above, the priority should be given to t he one with low level outp ut, which means if it

meets each of any low level output condition, AUX outputs low level, if none of the low level condition is met, AUX outputs high level.

2

When AUX outputs low level, it means the module is busy & cannot conduct operating mode checking. Within 1ms since AUX outp uts high level, the mode switch will be completed.

3

After switching to new op erating mode, it will not work in the new mode immediately until AUX rising edge last s for 2ms . If AUX stays on the high level, the operating mode switch can be affected immediately.

4

When the user switches to ot her operating modes from mode 3 (sleep mode) or it’s still in reset process, the module will reset user parameters, during which AUX outputs low level.

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6 Operating mode

There are four operating modes , which are set by M1 and M0, the details are as follows:

Mode（0-3）

M0

M1

Mode introduction

Remark

0 Normal

0

1

UART and wireless channel are op en, transp arent transmission is on

The receiver must work in mode 0 or mode 1

1 Wake up

1

0

UART and wireless channel are op en, the only difference with mode 0 is that before t ransmitting data, increasing the wake up code automatically, so that it can awake the receiver under mode 3.

The receiver could be 0,1 or 2 2 Power

saving

0 1 UART close, wireless is under air-awaken mode, after

receiving data, UART open and send data.

transmitter must be mode 1, unable to transmit in this mode.

3 Sleep

1

sleep mode, receiving parameter setting command is available.

more details on parameter specification.

6.1 Mode switch

 The us er can decide the operating mode by the co mb ination of M1 and M0. The two GPIO of MCU can be used to

switch mode. After modifying M1 or M0, it will s tart to work in new mode 1ms later if the module is free. If there

are any s erial data that are yet to finish wireless transmitting, it will start to work in new mod e after the UART

trans mitting finished. After the module rece ives the wireless data & trans mits the data through s erial port, it will

start to work in new mode after the transmitting finished. Therefore, the mode -switch is only valid when AUX outputs 1, otherwise it will delay.

 For example, in mode 0 or mode 1, if the user inputs massive data consecutively and switches operating mode at the

same time, the mode-switch operation is invalid. New mode checking can only be s tarted after all the user ’s data

process completed. It is recommended to check AUX p in out status and wait 2ms after A UX outputs high level

before switching the mode.

 If the module switches from other modes to stand -by mode, it will work in stand-by mode only after all the

remained data proces s completed. The feature can be used to s ave power consumption. For e xample, when the

trans mitter works in mode 0, after the e xternal MCU transmits data “12345”, it can switch to s leep mode

immediately without waiting the rising edge of the AUX pin, also the us er’s main MCU will go dormancy

immediately. Then the module will trans mit all the data through wireless transmission & go dormancy 1ms later

automatically, which reduces MCU working time & save power.

 Likewise, this feature can be us ed in any mode-switch. The module will start to work in new mode within 1ms after

completing present mode task, which enables the user to omit the procedure of AUX inquiry and switch mode

swiftly. For example, when s witching fro m transmitting mode to receiving mode, the use r MCU can go dormancy

before mode-switch, using external interrupt function to get AUX change so that the mode -switch can be realized.

 This operation is very flexible and efficient. It is totally des igned on the basis of the user MCU ’s convenience, at the

same time the work load and power cons umption of the whole system have been reduced and the efficiency of

whole system is largely improved.

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6.2 Normal mode (mode 0)

When M1 = 0 & M0 = 0, module works in mode 0

Transmitting

The module can receive the user data via serial port , and transmit wireless data p ackage of 58 bytes. When the data inputted by user is up to 58 byte, the module will start wireless t ransmission. During which the user can input data continuously for transmission. When the required transmission bytes are less than 58 bytes, t he module will wait 3-byte time and t reat it as data termination unless continuous data inp utted by user. Then the module will transmit all the data t hrou gh wireless channel. When the module receives the first data packet from user, the AUX outputs low level. After all the data are transmitted into RF chip and transmission start , AUX outputs high level. At this time, it means that the last wireless data p ackage transmission is st arted, which enables the user to input another 512 bytes continuously. T he data package transmitted from the module working in mode 0 can only be received by the module working in mode 0 or 1.

Receiving

The wireless receiving function of the module is on, the data p acket transmitted from the module working in mode 0 & mode 1 can be received. After the data packet is received, t he AUX outputs low level, 5ms later t he module starts to transmit wireless data through serial p ort TXD pin. After all the wireless data have been transmitted via serial port, the AUX outp uts high level.

6.3 Wake-up mode (mode 1)

When M1 = 0 & M0 = 1, module works in mode 1

Transmitting

The condition of data packet transmission & AUX function is the same as mode 0. The only difference is that the module will add preamble code before each data packet automatically. The p reamble code length depends on the wake-up time set in t he user parameters. The purpose of the preamble code is waking up the receiving module works in mode 2. Therefore, the data package transmitted from mode 1 can be received by mode 0, mode1 and mode 2.

Receiving

The same as that in mode 0.

6.4 Power-saving mode (mode 2)

When M1 = 1 & M0 = 0, module works in mode 2

Transmitting

UART is closed, the module cannot receive any serial port data from outside MCU. Hence the function of wireless transmission is not available for the module working in this mode.

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Receiving

In mode 2, it is required the data transmitter works in mode 1. The wireless module monitors the p reamble code at regular time. Once it gets the preamble code, it will remain as receiving st atus and waiting for t he completion of receiving t he entire valid data package. Then the AUX outputs low level, 5ms later the serial port is open to transmit received wireless data through TXD. Finally, AUX outputs high level after p rocess completed. The wireless module stays in “p ower-saving – monitoring” working status (polling). By setting different wake-up time, the module will have different receiving resp onse delay (2s in maximum) and average p ower consumption (30uA in minimum). The user needs to achieve a balance between communication delay time & average power consumption.

6.5 Sleep mode (mode 3)

When M1=1, M0=1, module works in mode 3

Transmitting

N/A

Receiving

N/A

Parameter

setting

This mode can be used for p arameter setting. It uses serial p ort 9600 & 8N1 t o set module working parameters through specific instruction format. (pls refer to parameters sett ing for details)

Notes

When the mode changes from stand-by mode to others, the module will reset its p arameters, during which the AUX keeps low level and then outputs high level after reset completed. It is recommended to check t he AUX rising edge for user.

7 Command format

In sleep mode（Mode 3：M1=1, M0=1）, it supports below ins tructions on list.

(Only support 9600 and 8N1 format when setting)

No.

Instruction

format

Illustration

1

C0+working

parameters

C0 + 5 bytes working p arameters are sent in hexadecimal format. 6 bytes in total and must be sent in succession, ( Save the parameters when power-down ).

2

C1+C1+C1

( Save the parameters when power-down )

3

C2+working

parameters

Three C1 are sent in hexadecimal format. The module returns the saved parameters and must be sent in succession.

4

C3+C3+C3

C2 + 5 bytes working p arameters are sent in hexadecimal format. 6 by tes in total and must be sent in succession. ( Do not save the parameters when power-down )

5

C4+C4+C4

Three C3 are sent in hexadecimal format. The module returns the version information and they must be sent in succession.

7.1 Default parameters

type

Default parameter values：：C0 00 00 1A 17 44

Model

Frequency

Address

Channel

Air data rate

Baud rate

Parity

Transmitting

power

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E32-915T30S

915MHz

0x0000

0x0F

2.4kbps

9600

8N1

1W

7.2 Reading operating parameters

Instruction format

Description

C1+C1+C1

In sleep mode（M0=1，M 1=1）， User gives the module instruction (HEX format): C1 C1 C1, Module returns the present configuration p arameters. For example, C0 00 00 1A 17 44.

7.3 Reading version number

Instruction format

Description

C3+C3+C3

In sleep mode（M0=1，M 1=1）,User gives the module instruction (HEX format): C3 C3 C3,Module returns its present version number, for example C3 32 xx yy. the second bytes means frequency. 32 here means the frequency is 433MHZ, 38 means frequency is 470MHz, 45 means frequency is; 868MHz, 44 means the frequency is 915 M Hz, 46 means th e frequency is 170MHz; xx is the version number and yy refers t o the other module features.

7.4 Reset command

Instruction format

Description

C4+C4+C4

In sleep mode（M0=1，M 1=1）, User gives the module instruction (HEX format): C4 C4 C4, the module resets for one time. During the reset p rocess, the module will conduct self-check, AUX outputs low level. After reset completing, the AUX outputs high level, then the module starts t o work regularly which the working mode can be switched or be given another instruction.

7.5 Parameter setting command

No.

Item

Description

Remark

0

HEAD

Fix 0xC0 or 0xC2, it means this frame data is control command

 Must be 0xC0 or 0xC2

C0: Save the parameters when power-down

C2: Do not save the p arameters when power-down

1

ADDH

High address byte of module

（the default 00H）

00H-FFH

2

ADDL

Low address byte of module

（the default 00H）

00H-FFH

3

SPED

7

6

UART parity bit

 UART mode can be different

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0

8N1 (default)

between communication parties

0

1

8O1

1

0

8 E1

1

8N1 (equal to 00)

5 4 3

TTL UART baud rate（bps）

 UART baud rate can be different

between communication parties

 The UART baud rate has nothing

to do with wireless transmission

parameters & won’t affect the

wireless transmit / receive features.

0 0 0

1200

0 0 1

2400

0 1 0

4800

0 1 1

9600 (default)

1 0 0

19200

1 0 1

38400

1 1 0

57600

1 1 1

115200

2 1 0

Air data rate（bp s）

 The lower the air data rate, the

longer the transmitting distance, better anti-interference

performance and longer transmitting time

 The air data rate must keep the

same for both communication parties.

0 0 0

0.3k

0 0 1

1.2k

0 1 0

2.4k (default)

0 1 1

4.8k

1 0 0

9.6k

1 0 1

19.2k

1 1 0

19.2k (same to 101)

1 1 1

19.2k (same to 101)

General Specifications

Except for E32 (400T20S)

4

CHAN

7 6 5

reserved

Write 0

Communication channel

00H-1FH, correspond to

900~931MHz

4 ~0, channel (900M Hz +CHAN * 1MHz), default 0FH (915MHz )

5

OPTIO N

7

Fixed transmission enabling bit（similar to M ODBUS）

 In fixed transmission mode, the

first three bytes of each user's data

frame can b e used as high/low

address and channel. The module

changes its address and channel

when transmit. And it will revert to

original setting after co mplete the process.

0

Transp arent transmission mode

1

Fixed transmission mode

6

IO drive mode (default 1)

 This bit is used to the module

internal pull-up resistor. It also

increases the level’s adapt ability

in case of open drain. But in some

cases, it may need external pull-up resistor.

1

TXD and AUX push-p ull outp uts, RXD pull-up inputs

0

TXD、AUX open-collector output s, RXD open-collector inputs

5 4 3

wireless wake-up time

 The transmit & receive module

work in mode 0, whose delay time

0 0 0

250ms (default)

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0 0 1

500ms

is invalid & can be arbitrary value.

 The transmitter works in mode 1

can transmit the p reamble code of

the corresponding time continuously.

 When the receiver works in mode

2, the time means the monitor interval time (wireless wake-up).

Only the data from transmitter that works in mode 1 can be received.

0 1 0

750ms

0 1 1

1000ms

1 0 0

1250ms

1 0 1

1500ms

1 1 0

1750ms

1 1 1

2000ms

2

FEC switch

 After turn off FEC, the actual data

transmission rate increases while anti-interference ability decreases.

Also the transmission distance is relatively short.

 Both communication parties must

keep on the same p ages about turn-on or turn-off FEC.

0

Turn off FEC

1

Turn on FEC (default)

1 0 Transmission power (approximation)

The external power must make sure

the ability of current output more than 1A and ensure the power supply ripple within 100mV.

Low power transmission is not

recommended due to its low power supply efficiency.

0

30dBm (default)

0

1

27dBm

1

0

24dBm

1

21dBm

For example: The meaning of No.3 "S PED" byte:

The binary bit of the byte

7 6 5 4 3 2 1

0

Configures by user

0 0 0 1 1 0 1

0

Meaning

UART parity bit 8N1

UART baud rate is 9600

Air data rate is 2.4k

Corresponding hexadecimal

1

A

8. Hardware design

 It is recommended to us e a DC stabilized power supply. The power supply ripple factor is as s mall as possible, and

the module needs to be reliably grounded.；

 Please pay attention to the correct connection of the pos itive and negative poles of the power s upply. Reverse

connection may cause permanent damage to the module；

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 Please check the power supply to ensure it is within the recommended voltage otherwise when it e xceeds the

maximum value the module will be permanently damaged；

 Please check the stability of the power supply, the voltage can not be fluctuated frequently ；  W hen designing the power supply circuit for the module, it is often recommende d to reserve more than 30% of the

margin, s o the whole machine is beneficial for long -term stable operation.；

 The module should be as far away as pos s ible from the power supply, trans formers, high -frequency wiring and other

parts with large electromagnetic interference.；

 High-frequency digital routing, high-frequency analog routing, and power routing must be avoided under the

module. If it is necessary to pass through the module, as sume that the module is soldered to the Top Layer, and the

copper is spread on the Top Layer of the module contact part(well grounded), it must be close to the digital part of

the module and routed in the Bottom Layer；

 Assuming the module is soldered or placed over the Top Laye r, it is wrong to randomly route over the Bottom Layer

or other layers, which will affect the module's spurs and receiving s ensitivity to varying degrees ；

 It is assumed that there are devices with large electro magnetic interference around the module that will greatly

affect the performance. It is recommended to keep them away from the module according to the strength of the

interference. If necessary, appropriate isolation and shielding can be done；

 Assume that there are traces with large electro magnetic interference (high -frequency digital, h igh-frequency analog,

power traces) around the module that will great ly affect the performance of the module. It is reco mmended to stay

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

can be done.

 If the co mmunication 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 s ome physical layers such as TTL protocol at 2.4GHz , for example: USB3.0；  The mounting structure of antenna has a great influence on the performance of the module. It is necessary to ens ure

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 outs ide；

 The antenna must not be installed ins ide the metal case, which will caus e the transmission distance to be greatly

weakened.

9 FAQ

9.1 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 abs orbing wireless radio wave, so performance will be poor when tes ting 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 t he

distance).

 The power supply low voltage under room temperature is lower than 2.5V, the lower the voltage, the lower the

Chengdu Ebyte Electronic Technology Co,;Ltd E32-915T30S user manual

trans mitting power.

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

9.2 Module is easy to damage

 Please check the power s upply source, ensure it is 2.0V~3.6V, voltage higher than 3.6V will damage the module.  Please check the stability of power source, the voltage cannot fluctuate too much.  Please make sure antistatic measure are taken when installing and us ing, high frequency devices have electrostatic

susceptibility.

 Please ensure the humidity is within limited range, some parts are sensitive to humidity.  Please avoid us ing modules under too high or too low temperature.

9.3 BER(Bit Error Rate) is high

 There are co-channel signal interference nearby, please be away from interference s ources or modify frequency and

channel to avoid interference;

 Poor power supply may cause mes sy code. Make s ure that the power s upply is reliable.  The extension line and feeder quality are poor or too long, so the bit error rate is high;

10 Production guidance

10.1 Reflow soldering temperature

Profile Feature

Curve characteristics

Sn-Pb Assembly

Pb-Free Assembly

Solder Paste

Solder paste

Sn63/Pb37

Sn96.5/Ag3/Cu0.5

Preheat Temperature min （Tsmin）

Min preheating temp.

100℃

150℃

Preheat temperature max (Tsmax)

Mx preheating temp.

150℃

200℃

Preheat Time (Tsmin to Tsmax)(ts)

Preheating time

60-120 sec

Average ramp-up rate(Tsmax to Tp)

Average ramp-up rate

3℃/second max

Liquidous Temperature (TL)

Liquid phase temp.

183℃

217℃

Time（tL）Maintained Above（TL）

Time below liquid phase line

60-90 sec

30-90 sec

Peak temperature（Tp）

Peak temp.

220-235℃

230-250℃

Aveage ramp-down rate（Tp to Tsmax）

Aveage ramp-down rate

6℃/second max

Time 25℃ to peak temperature

Time to peak temperature for

25℃

max 6 minutes

max 8 minutes

Chengdu Ebyte Electronic Technology Co,;Ltd E32-915T30S user manual

10.2 Reflow soldering curve

11 E32 series

Model No.

Core IC

Frequency

Hz

Tx

power

dBm

Distance

km

Data Rate

Package

Size

mm

Interface

E32-868T20S

SX1276

868M

20 3 0.3k~19.2k

SMD

16 * 26

UART

E32-915T20S

SX1276

915M

20 3 0.3k~19.2k

SMD

16 * 26

UART

E32-400T20S

SX1278

433M 470M

20 3 0.3k~19.2k

SMD

16 * 26

UART

E32-915T30S

SX1276

915M

30 8 0.3k~19.2k

SMD

25 * 40.3

UART

E32-868T30S

SX1276

868M

30 8 0.3k~19.2k

SMD

25 * 40.3

UART

E32-433T30S

SX1278

433M

30 8 0.3k~19.2k

SMD

25 * 40.3

UART

E32-433T20S2T

SX1278

433M

20 3 0.3k~19.2k

SMD

17 * 30

UART

E32-868T30D

SX1276

868M

30 8 0.3~19.2k

DIP

24 * 43

SMA-K

E32-915T30D

SX1276

915M

30 8 0.3~19.2k

DIP

24 * 43

SMA-K

E32-170T30D

SX1278

170M

30 8 0.3k~9.6k

DIP

24 * 43

SMA-K

E32-868T20D

SX1276

868M

20 3 0.3~19.2k

DIP

21 * 36

SMA-K

E32-915T20D

SX1276

915M

20 3 0.3~19.2k

DIP

21 * 36

SMA-K

E32- 433T20DC

SX1278

433M

20 3 0.3k~19.2k

DIP

21 * 36

SMA-K

Chengdu Ebyte Electronic Technology Co,;Ltd E32-915T30S user manual

E32- 433T30D

SX1278

433M

30 8 0.3k~19.2k

DIP

24 * 43

SMA-K

E32-433T27D

SX1278

433M

27 5 0.3k~19.2k

DIP

24 * 43

SMA-K

E32-433T20S1

SX1278

433M

20 3 0.3k~19.2k

SND

17 * 25.5

SMA-K

12 Antenna recommendation

The antenna is an important role in the co mmunication process. A good antenna can largely improve the

communicat ion s ystem. Therefore , we reco mmend some antennas for wireless modules with e xcellent performance and

reasonable price.

Model No.

Type

Frequency

Hz

Interface

Gain dBi

Height

Cable

Function feature

TX915-XP-100

Sucker antenna

915M

SMA-J

3.5

25cm

100

Sucker antenna, High gain

TX915-JK-20

Rubber antenna

915M

SMA-J

3

210mm

-

Flexible &omnidirectional

TX915-JK-11

Rubber antenna

915M

SMA-J

2.5

110mm

-

Flexible &omnidirectional

TX915-JZ-5

Rubber antenna

915M

SMA-J

2

50mm

Short straight

&omnidirectional

12.1 Antenna Selection

Factory default welding of 0R resistance is shown in the figure (left). The antenna interface is IP EX. If you need to

change the antenna interface into a stamp hole, please change the 0R resistance as shown in the figure above (right)

Chengdu Ebyte Electronic Technology Co,;Ltd E32-915T30S user manual

13 Package for batch order

Chengdu Ebyte Electronic Technology Co,;Ltd E32-915T30S user manual

Revision history

Version

Date

Description

Iss ued by

1.00

2017-11-10

Initial version

huaa

1.10

2018-01-11

Updating E32 (868T30S)/E32 (915T30S)

huaa

1.20

2018-01-15

Updating E32 (868T20S)/E32 (915T20S)/ E32 (400T20S)

huaa

1.30

2018-01-22

Updating E32 (868T20D)/ E32 (868T30D)

E32 (915T20D)/ E32 (915T30D)/ E32 (170T30D)

huaa

1.40

2018-05-24

Updating antenna option

huaa

1.50

2018-10-11

Manual dividing

huaa

About us

Technical support: supp ort@cdebyte.com Documents and RF Setting download link: www.ebyt e.com Thank you for using Ebyte products! Please contact us with any questions or suggestions: info@cdebyte.com

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