EBYTE E32-868T30S SX1276 868MHz 1W SMD Wireless Module User Manual

EBYTE E32-868T30S SX1276 868MHz 1W SMD Wireless Module

E32-868T30S User Manual

Overview

The E32-868T30S is a wireless module that operates on a frequency of 868MHz and has a transmission power of 1W. It utilizes the SX1276 chip and is designed to provide reliable wireless communication for a variety of applications.

Features

• 868MHz frequency
• 1W transmission power
• Utilizes the SX1276 chip
• Provides reliable wireless communication

Specification and Parameter

The E32-868T30S has both limit and operating parameters that should be considered. The limit parameters include the temperature and voltage ranges, while the operating parameters include the output power, frequency deviation, and data rate.

Limit Parameter

• Temperature Range: -40°C to 85°C
• Voltage Range: 2.0V to 3.6V

Operating Parameter

• Output Power: 30dBm (1W)
• Frequency Deviation: < ±0.5kHz @ 868MHz
• Data Rate: < 300kbps

Size and Pin Definition

The E32-868T30S has a compact size and pin definition that allows for easy integration with an MCU (microcontroller unit).

Connect to MCU

To connect the E32-868T30S to an MCU, follow these steps:

1. Connect the VCC pin to the MCU’s power supply (2.0V to 3.6V)
2. Connect the GND pin to the MCU’s ground
3. Connect the RXD pin to the MCU’s TX pin
4. Connect the TXD pin to the MCU’s RX pin
5. Connect the AUX pin to the MCU’s GPIO pin if necessary

Function Description

The E32-868T30S has various functions, including fixed and broadcasting transmission. It also has UART output and wireless transmitting indications, as well as a configuration procedure and notes for the AUX pin.

Fixed Transmission

In fixed transmission mode, the E32-868T30S sends data continuously without waiting for a response.

Broadcasting Transmission

In broadcasting transmission mode, the E32-868T30S sends data once and waits for a response. If no response is received, it will resend the data up to three times.

Indication of UART Output

The E32-868T30S has UART output that can be used for debugging and monitoring purposes. It indicates the module’s status,including the current mode, configuration, and transmission status.

Indication of Wireless Transmitting

The E32-868T30S also has wireless transmitting indications that can be used to monitor its transmission status. It indicates whether the module is transmitting or in standby mode.

Configuration Procedure of Module

The E32-868T30S can be configured using a UART interface. Follow these steps to configure the module:

1. Set the module to configuration mode
2. Send configuration commands via UART
3. Save the configuration
4. Exit configuration mode

Notes for AUX

The AUX pin can be used as a GPIO pin for additional functionality. It can be set to high or low depending on the application’s requirements.

Operating Mode

The E32-868T30S has three operating modes: normal mode, wake-up mode, and power-saving mode.

Mode Switch

The module can be switched between modes by setting specific bits in the module’s configuration register. The table below shows the bit settings for each mode:

Normal Mode (Mode 0)

In normal mode, the E32-868T30S operates normally and sends or receives data as expected.

Wake-up Mode (Mode 1)

In wake-up mode, the E32-868T30S wakes up periodically and checks for incoming data. If data is received, it switches to normal mode and processes the data.

Power-saving Mode (Mode 2)

In power-saving mode, the E32-868T30S enters a deep sleep state and wakes up periodically to check for incoming data. If data is received, it switches to normal mode and processes the data. This mode consumes the least amount of power.

These are the main features and usage instructions for the E32-868T30S wireless module. For more detailed instructions and information, refer to the product user manual.

Product Overview

Introduction
E32-868T30S is a wireless serial port module (UART) based on SEMTECH’s SX1276 RF chip. It has multiple transmission modes, working in the 862MHz~893MHz, (default 868MHz), LoRa spread spectrum technology, TTL output, compatible with 3.3v~5.5v IO.

SX1276 features LoRa™, which will bring longer communication distance, and has the advantages of concentrated power density, meanwhile it has a very strong confidentiality. the modules of 20dBm transmitting power adopt industrial grade crystal oscillators to ensure the stability and consistency, its precision is lower than the widely adopted 10ppm.E32-868T30S is in stable bulk production and are widely applied in utility meters, IoT renovation, smart home, etc. The modules feature data encryption and compression. 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 being interfered, which increased the reliability and transmitting efficiency.
E32-868T30S strictly follows design standards of FCC, and meets various RF certification requirements for exporting.

Features

• Communication distance tested is up to 8km
• Maximum transmission power of 1W, software multi-level adjustable；
• Support the global license-free ISM 868MHz 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 design, support -40 ~ 85 °C for working over a long time；
• IPEX and stamp hole optional, good for secondary development and integration.

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.

Specification and parameter

Limit parameter

Operating parameter

Main parameter| Performance|

Remark

---|---|---
Min| Typ.| Max.
Operating voltage（V）| 3.3| 5.0| 5.2| ≥5.0 V ensures output 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（MHz）| 862| 868| 893| Support ISM band
Power consumption| Transmitting current [mA]| | 600| | Instant power consumption
Receiving current [mA]| | 25| |
Turn-off current [μA]| | 5| | Software is shut down
Max Tx power（dBm）| 29.4| –| 30.5|
Receiving sensitivity（dBm）| -145| -147| -148| Air data rate is 0.3kbps
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 open area, antenna gain: 5dBi，

antenna height: 2.5m，air data rate: 2.4kbps

TX length

|

58 Byte

| Maximum capacity of single package, automatic

subcontracting after exceeding

Buffer| 512 Byte|
Modulation| LoRa™|
Communication interface| TTL| @3.3V
Package| SMD|
Connector| 2.54mm|
Size| 25 * 40.5 mm|
Antenna| IPEX/stamp hole| 50 ohm impedance

Product Size and pin definition

3

| ****

AUX

| ****

Output

| To indicate module ’ s working status & wakes up the external MCU. During the procedure of self-check initialization, the pin outputs low level. Can be

configured as push-pull output (can be suspended).

4

| ****

TXD

| ****

Output

| TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can be

configured as open-drain or push-pull output

5

| ****

RXD

| ****

Input

| TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can be

configured as open-drain or pull-up input. Ground

6

| ****

M1

| Input

（weak pull-up）

| Work with M0 to decide 4 working modes of module (not suspended, if not used, could be grounded).

7

| ****

M0

| Input

（weak pull-up）

| Work with M1 to decide 4 working modes of module (not suspended, if not used, could be grounded).
---|---|---|---
11| ANT| output| High frequency signal output, 50 ohm characteristic impedance
12| GND| | Ground
13| GND| | Ground
14| GND| | Ground
18| PB0| Input/output| NC PIN, This pin needs to be dangling and the user does not need to connect (for later extension use)
19| PB1| Input/output| NC PIN, This pin needs to be dangling and the user does not need to connect

(for later extension use)

20| PB3| Input/output| NC PIN, This pin needs to be dangling and the user does not need to connect

(for later extension use)

21| +3.3V| Input| Power pins for program loading (suspended, no need for user to connect)
22| SWIM| Input| SWIM pin for program load (dangling, user does not need to connect)
23| GND| Input| Ground pins for program loading (dangling, no user connection required)
24| RESET| input| Reset pins for program loading (dangling, no need for user to connect)

Product Connect to MCU

the TXD & AUX pin.

Connect Function description

Fixed transmission

Broadcasting transmission

Broadcasting address

• For example: Set the address of module A as 0xFFFF or 0x0000, and the channel as 0x04;
• When module is the transmitter (transparent transmission), all modules under channel 0x04 will receive the data, the purpose of broadcast is realized.

Monitor address

• For example: Set the address of module A as 0xFFFF or 0x0000, and the channel as 0x04;
• When module A is the receiver, it can receive the data sent from all modules under channel 0x04, the purpose of monitor is realized.

Reset

• When the module is powered, AUX outputs low level immediately, conducts hardware self-check and sets the operating mode based on user’s parameters. During the process, the AUX remains low level. After the process completed, the AUX outputs high level and starts to work as per the operating mode combined by M1 and M0.
  Therefore, users need to wait the AUX rising edge as the start of module’s normal work.

AUX description

• AUX Pin can be used as indication for wireless send & receive buffer and self-check.
• It can indicate whether there are data that are not sent yet via wireless way, or whether all wireless data has been sent through UART, or whether the module is still in the process of self-check initialization.

1. Indication of UART output
   • To wake up external MCU
2. Indication of wireless transmitting
   • Buffer (empty): the internal 512 bytes data in the buffer are written to the RFIC (Auto sub-packaging).
   • When 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 transmit data at this circumstance, it may cause overtime when the module is waiting for the user data, or transmitting wireless sub package.
   • When 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.
3. Configuration procedure of module
4. Only happened when power-on resetting or exiting sleep mode
5. Notes for AUX

1

| For function 1 & function 2 mentioned above, the priority should be given to the one with low level output, 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 outputs high level, the mode switch will be completed.

3

| After switching to new operating mode, it will not work in the new mode immediately until AUX rising edge lasts for

2ms . If AUX stays on the high level, the operating mode switch can be affected immediately.

4

| When the user switches to other 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.

Operating mode

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

mode 0 is that before transmitting 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
3 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.

4 Sleep| 1| 1| sleep mode, receiving parameter setting command is available.| more details on parameter specification.

Mode switch

• The user can decide the operating mode by the combination of M1 and M0. The two GPIO of MCU can be used to switch mode. After modifying M1 or M0, it will start to work in new mode 1ms later if the module is free. If there are any serial data that are yet to finish wireless transmitting, it will start to work in new mode after the UART transmitting finished. After the module receives the wireless data & transmits the data through serial 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 started after all the user’s data process completed. It is recommended to check AUX pin out status and wait 2ms after AUX 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 process completed. The feature can be used to save power consumption. For example, when the transmitter works in mode 0, after the external MCU transmits data “12345”, it can switch to sleep mode immediately without waiting the rising edge of the AUX pin, also the user’s main MCU will go dormancy immediately. Then the module will transmit all the data through wireless transmission & go dormancy 1ms later automatically, which reduces MCU working time & save power.
• Likewise, this feature can be used 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 switching from transmitting mode to receiving mode, the user 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 designed on the basis of the user MCU’s convenience, at the same time the work load and power consumption of the whole system have been reduced and the efficiency of whole system is largely improved.

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 package of 58 bytes. When the data inputted by user is up to 58 byte, the module will start wireless transmission. During which the user can input data continuously for transmission.

When the required transmission bytes are less than 58 bytes, the module will wait 3-byte time and treat it as data termination unless continuous data inputted by user. Then the module will transmit all the data through 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 package transmission is started, which enables the user to input another 512 bytes continuously. The 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 packet transmitted from the module working in mode 0 & mode 1 can be received.

After the data packet is received, the AUX outputs low level, 5ms later the module starts to transmit wireless data through serial port TXD pin.

After all the wireless data have been transmitted via serial port, the AUX outputs high level.

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 preamble code length depends on the wake-up time set in the 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.

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.

Receiving| In mode 2, it is required the data transmitter works in mode 1. The wireless module monitors the preamble code at regular time.

Once it gets the preamble code, it will remain as receiving status and waiting for the completion of receiving the 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 process completed.

The wireless module stays in “power-saving – monitoring” working status (polling).

By setting different wake-up time, the module will have different receiving response delay (2s in maximum) and average power consumption (30uA in minimum).

The user needs to achieve a balance between communication delay time & average power consumption.

---|---

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 parameter setting. It uses serial port 9600 & 8N1 to set module working parameters through specific instruction format. (pls refer to parameters setting for details)

Notes

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

Command format

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

(Only support 9600 and 8N1 format when setting)

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 parameters are sent in hexadecimal format. 6 bytes 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.

Default parameters

| Default parameter values：：C0 00 00 1A 17 44
---|---
Model| Frequency| Address| Channel| Air data rate| Baud rate| Parity| Transmittin g power
E32-868T20S| 868MHz| 0x0000| 0x06| 2.4kbps| 9600| 8N1| 100mW

Reading operating parameters

C1+C1+C1

| In sleep mode（M0=1，M1=1），

User gives the module instruction (HEX format): C1 C1 C1, Module returns the present configuration parameters.

For example, C0 00 00 1A 17 44.

Reading version number

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 MHz, 46 means the frequency is 170MHz; xx is the version number and yy refers to the other module features.

Reset command

User gives the module instruction (HEX format): C4 C4 C4, the module resets for one time. During the reset process, the module will conduct self-check, AUX outputs low level. After reset completing, the AUX outputs high level, then the module starts to work regularly which the working mode can be switched or be given another instruction.

Parameter setting command

Must be 0xC0 or 0xC2

C0: Save the parameters   when power-down

C2: Do not save the parameters when power-down

1| ADD H| 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| l  UART mode can be different between communication parties
0| 0| 8N1 (default)
0| 1| 8O1
1| 0| 8 E1
1| 1| 8N1 (equal to 00)
5| 4| 3| TTL UART baud rate（bps）| l  UART baud rate can be different between communication parties

l  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（bps）| l  The lower the air data rate, the longer    the transmitting   distance,

better  anti-interference  performance

0| 0| 0| 0.3k
0| 0| 1| 1.2k
| | 0| 1| 0| 2.4k (default)| and longer transmitting time

l  The air data rate must keep the same for both communication parties.

---|---|---|---|---|---|---
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|

CHA N

| 7| 6| 5| reserved| Write 0
Communication channel| 00H-1FH, correspond to 862~893MHz
4 ~0, channel (862MHz+CHAN * 1MHz), default 06H

(868MHz)

5

|

OPTI ON

| 7| Fixed transmission enabling bit（similar to

MODBUS）

| l  In fixed transmission mode, the first three bytes of each user’s data frame can be used as high/low address and channel. The module changes its address and channel when transmit. And it will revert to original setting after complete the process.
0| Transparent transmission mode
1| Fixed transmission mode
6| IO drive mode (default 1)| l   This bit is used to the module internal pull-up resistor. It also increases the level’s adaptability in case of open drain. But in some cases, it may need external pull-up

resistor.

1

| TXD and AUX push-pull outputs, RXD pull-up

inputs

0

| TXD、AUX open-collector outputs, RXD open-collector inputs
5| 4| 3| wireless wake-up time| l  The transmit & receive module work in mode 0, whose delay time is invalid & can be arbitrary value.

l  The transmitter works in mode  1 can transmit the preamble code  of the corresponding time continuously.

l  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| 0| 0| 250ms (default)
0| 0| 1| 500ms
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| l  After turn off FEC, the actual data transmission rate increases while anti-interference ability decreases. Also the transmission distance is relatively short.

l   Both communication parties must keep on the same pages 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| 0| 30dBm (default)
0| 1| 27dBm
1| 0| 24dBm

1

|

1

|

21dBm

For example: The meaning of No.3 “SPED” 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

Hardware design

• It is recommended to use a DC stabilized power supply. The power supply ripple factor 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. Reverse connection may cause permanent damage to the module；
• Please check the power supply to ensure it is within the recommended voltage otherwise when it exceeds the maximum value the module will be permanently damaged；
• Please check the stability of the power supply, the voltage can not be fluctuated frequently；
• When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the margin, so 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 routing, high-frequency analog routing, and power routing 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(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 Layer, it is wrong to randomly route over the Bottom Layer or other layers, which will affect the module’s spurs and receiving sensitivity to varying degrees；
• It is assumed that there are devices with large electromagnetic 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 electromagnetic interference (high-frequency digital, high-frequency analog, power traces) around the module that 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 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 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；
• The antenna must not be installed inside the metal case, which will cause the transmission distance to be greatly weakened.

FAQ

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).
• The power supply low voltage under room temperature is lower than 2.5V, the lower the voltage, the lower the transmitting power.
• Due to antenna quality or poor matching between antenna and module.

Module is easy to damage

• Please check the power supply 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 using, high frequency devices have electrostatic susceptibility.
• Please ensure the humidity is within limited range, some parts are sensitive to humidity.
• Please avoid using modules under too high or too low temperature.

BER(Bit Error Rate) is high

• There are co-channel signal interference nearby, please be away from interference sources or modify frequency and channel to avoid interference;
• Poor power supply may cause messy code. Make sure that the power supply is reliable.
• The extension line and feeder quality are poor or too long, so the bit error rate is high;

Production guidance

Reflow soldering temperature

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℃
Average ramp-down rate（Tp to Tsmax）| Average ramp-down rate| 6℃/second max| 6℃/second max
Time 25℃ to peak temperature| Time to peak temperature for

25℃

| max 6 minutes| max 8 minutes

Reflow soldering curve

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
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

Antenna recommendation

The antenna is an important role in the communication process. A good antenna can largely improve the communication system. Therefore, we recommend some antennas for wireless modules with excellent performance and reasonable price.

Model No.| Type| Frequency Hz|

Interfac e

| Gain dBi| Height| Cable| Function feature
---|---|---|---|---|---|---|---
TX868-XP-100| Sucker antenna| 868M| SMA-J| 3.5| 100cm| –| Sucker antenna, High gain
TX868-JK-20| Rubber antenna| 868M| SMA-J| 3| | –| Flexible &omnidirectional
TX868-JZ-5| Rubber antenna| 868M| SMA-J| 2| | –| Short straight &omnidirectional

Antenna Selection

Factory default welding of 0R resistance is shown in the figure (left). The antenna interface is IPEX. If you need to change the antenna interface into a stamp hole, please change the 0R resistance as shown in the figure above (right)

Package for batch order

Revision history

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
1.60| 2020-04-13| | Ren
1.7| 2020-05-12| Modify pin definition on page 5| du

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References

• 串口服务器_数传电台_4G DTU_遥控开关_LoRa/ZigBee/WiFi/蓝牙模块-成都亿佰特电子科技有限公司官网

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