EBYTE E49-400T20D 433MHz DIP Wireless Module User Manual

E49-400T20D User Manual
433MHz DIP Wireless Module

Disclaimer and copyright notice
The information in this article, including the URL for reference, is subject to change without notice. The document is provided “as is” without warranty of any kind, including any warranty of merchantability, fitness for a particular purpose or non-infringement, and any warranty of any proposal, specification or sample referred to elsewhere. This document does not bear any liability, including any infringement of any patent rights resulting from the use of the information contained in this document. No estoppel or other license, express or implied, is granted herein for the use of the intellectual property.
All the test data obtained in this paper are obtained by the E-Baite laboratory, and the actual results may be slightly different.
It is hereby declared that all trade names, trademarks, and registered trademarks mentioned herein are the property of their respective owners.
The right of final interpretation belongs to Chengdu Yibaite Electronic Technology Co., LTD.

The attention
The contents of this manual may change due to product version upgrades or other reasons.
E-baite Electronic Technology Co., Ltd. reserves the right to modify the contents of this manual without any notice or prompt. This manual is only used as a guide, and Chengdu Yibaite Electronic Technology Co., Ltd. makes every effort to provide accurate information in this manual, but Chengdu Yibaite Electronic Technology Co., Ltd. does not guarantee that the content of this manual is completely free of errors, and all statements, information, and Suggestions in this manual do not constitute any express or implied warranty.

Overview

1.1 Introduction
E49-400T20D is an ultra-high cost-effective wireless module developed by Chengdu Mbyte. There are 4 operating modes. Each transmission mode has its own characteristics and can be applied to various application scenarios. E49-400T20D perfectly supports industrial-grade applications and undergoes rigorous testing at the factory to ensure its industrial reliability and batch consistency.
E49-400T20D supports a maximum transmission power of 20dBm. Users can set a lower output power to save power consumption. The module works at 433MHz, with TTL level output, and is compatible with 3.3V.
The module has a data encryption function. The data transmitted by the module in the air is random. Through strict encryption and decryption algorithms, the data interception is meaningless, the probability of interference is reduced, and the reliability and transmission efficiency is improved. Besides, it is a low-cost wireless serial transceiver module.

1.2 Features

• The measured communication distance is up to 2.5km;
• Maximum transmit power is 100mW, the software can be adjusted at multiple levels;
• The global license-free ISM 433MHz frequency band;
• Data transmission rate:1.2Kbps～200Kbps;
• Low power consumption mode, suitable for battery application;
• GFSK modulation;
• 2.6V~3.3V power supply;
• Industrial-grade standard design for long-term use of -40 ~ 85°C;
• SMA antenna interface.

1.3 Application

• Wearable devices;
• Smart home and industrial sensors;
• Security system, Positioning system;
• Wireless remote control, unmanned drone;
• Wireless game remote control;
• Health care product；
• Wireless voice, wireless headphones;
• Automobile industry application.

Specification and parameter

2.1 Limit parameter

Main parameter

|

Performance

| Remark
---|---|---
Min.|

Max.

Power supply（V）| 0| 5.5| Voltage over 5.5V will cause permanent damage to the module
Blocking power（dBm）| –| 10| Chances of burn is slim when modules are used in short distance
Operating temperature（℃）| -40| 80|

2.2 Operating parameter

Main parameter|

Performance

|

Remark

---|---|---
Min.| Typ.|

Max.

Operating voltage（V）| 2.6| 5| 5.5| Voltage over 5.5V will cause permanent damage to the module
Communication level（V）| | 3.3| |
Operating temperature（℃）| -40| –| 80| Industrial design
Operating frequency（MHz）| 410| 433| 510| Support ISM band
Power consumption| TX current（mA）| | 75| | Instant power consumption
RX current（mA）| | 12| |
Sleep current（μA）| | 0.7| | Software is shut down
Max Tx power（dBm）| –| –| 20.0|
Receiving sensitivity（dBm）| -116| -117| -117| Air data rate is 1.2kbps
Air data rate（bps）| 1.2k| 2.4k| 200k| Controlled via user’s programming

Main parameter

| Description|

Remark

---|---|---
Distance for reference| 2500m| Test condition：clear and open area, antenna gain: 5dBi，

antenna height: 2.5m，air data rate: 1.2kbps

Sub-packet| 54 Byte| The maximum capacity of a single package is automatically packed after exceeding.
Buffer| 500 Byte|
Modulation| GFSK|
Communication interface| UART|
Package| DIP|
Connector| 2.54mm pin header|
Size| 36*21mm|
Antenna| SMA| 50-ohm impedance

Size and pin definition

Pin No.

| Pin item| Pin direction|

Application

---|---|---|---
1| M0| Input（weak pull-up）| Work with M1 to decide 4 working modes of module (can be suspended, internal pull-up resistor).
2| M1| Input（weak pull-up）| Work with M0 to decide 4 working modes of module (can be suspended, internal pull-up resistor).
3| RXD| Input| TTL UART input, connects to external TXD output pin.
4| TXD| Output| TTL UART output, connects to external RXD input pin.
---|---|---|---
5| 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.
6| VCC| | Module power supply positive reference, voltage range: 2.6V ~ 3.3V DC
7| GND| | Ground
8| GND| | Ground
9| GND| | Ground
10| GND| | Ground

Connect to MCU

the TXD & AUX pin.

Function description

5.1 Module reset
When the module is powered on, 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 is completed, the AUX outputs high level and starts to work as 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.
5.2 AUX description
AUX P is used as an indication for wireless sending & receiving 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.
5.2.1 Wireless receiving an indication
After receiving the valid wireless data, the module will immediately pull AUX low and start UART to output data and then pull up AUX after the data output is completed.

5.2.2 Wireless transmission indication
After receiving the serial port data, the module will immediately pull down AUX and start sending data wirelessly and after all the data is sent, pull up AUX.

5.2.3 Reset and exit sleep mode
Only when resetting and exiting sleep mode

Timing Sequence Diagram of AUX when self-check

5.3.4 Notes for AUX
The function 1 and function 2 mentioned above have low output priority, that is, if any output low condition is met,
AUX outputs a low level; when all low-level conditions are not met, AUX outputs a high level.
When the AUX output is low, it indicates that the module is busy, and the operating mode detection will not be performed; when the AUX output is high, the mode switching will be completed.
When users enter other modes from mode 3 (sleep mode) or during the reset process, the module will reset user parameters, during which AUX outputs low level.

5.3.5 Fixed-point mode description

5.3.6 Broadcast transmission

5.3.7 Broadcast address

Example:

• Set the address of module A to 0xFFFF and the channel to 0x04
• When module A is used for transmission (same mode, transparent transmission mode), all receiving modules under the 0x04 channel can receive data to achieve the purpose of broadcasting.

5.3.8 Monitor Address
Example: Set the address of module A to 0xFFFF and the channel to 0x04.When module A is used as a receiver, it can receive all the data under the 0x04 channel to achieve the purpose of monitoring.

Operating mode

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

Mode(0-3)

| M1| M0| Description|

Remark

---|---|---|---|---
0 Transmission mode| 0| 0| UART and wireless channel are open, the module performs data transmission according to the set transmission mode| The transmission method of the sender and receiver must be consistent
1 RSSI mode| 0| 1| Wireless off and UART opens, the module outputs RSSI signal strength value at 100ms timing| Relative intensity values only
2 Setting mode| 1| 0| Wireless off, can receive UART command, refer to Command List, fixed baud rate is 9600，8N1| Parameter configuration
3 Sleep mode| 1| 1| The module goes to sleep standby mode, and the serial UART and wireless are turned off.| Ultra-lower power consumption sleep

6.1 Mode switching

• Users can combine M0 and M1 with high and low levels to determine the operating mode of the module. Users can use the MCU’s 2 GPIOs to control the node switching; after changing M0,M1: the module is idle and after 1ms, it can start working according to the new operating mode; if the module has not transmitted serial port data via wireless, then entering the new operating mode after the transmission completed; if the module receives the wireless data and sends out the data through the serial port, it needs to finish sending before entering the new operating mode; if the module; so the mode switching can only be effective when AUX outputs 1, otherwise the switch will be delayed.
• For example: In mode 0, the user continuously inputs a large amount of data and switches the mode at the same time. The mode switching operation is invalid at this time; the module will process all the user data before performing the new mode detection; so the general recommendation is: Detect the AUX pin output status, wait for 2ms after the AUX output goes high before switching.
• When the module is switched from other modes to sleep mode, if any data has not been processed, the module will enter the sleep mode after processing the data(including receiving and sending). This feature can be used for fast sleep mode to save power consumption; for example: the transmitter module works in mode0, the user initiates serial data “12345”,and then does not have to wait for the AUX pin to be idle (high level),and can  directly switch to sleep mode, And the user’s main MCU will immediately sleep, the module will automatically send all user data through wireless, and automatically enter sleep within 1ms; thus saving the MCU’s working time and reducing power consumption.
• Similarly, any mode switch can use this feature. After processing the current mode event, the module will automatically enter the new mode within 1ms; thereby eliminating the user’s query of AUX and achieving the goal of fast switching ,For example, switching from the transmission mode to the setting mode; the user MCU can also go to sleep mode in advance before the mode switching, and use the external interrupt function to obtain the AUX change to perform the mode switching.
• This operation mode is very flexible and efficient. It is designed in accordance with the convenience of the user MCU, and can reduce the workload of the entire system as much as possible, improve system efficiency and reduce power consumption.

6.2 Transmission mode（Mode 0）

Type

|

M0 = 0 ， M1 = 0

---|---
Transm itting| The module receives user data from the serial port, the maximum length of the wireless data packet transmitted by the module is 54 bytes, when the amount of user input data reaches 54 bytes, the module will start wireless transmission. At this time, the user can continue to enter the data that needs to be transmitted.
When the user needs to transmit less than 54 bytes, the module waits for about 20ms. If there is no user data to continue to input, the data is considered to be terminated. At this time, the module sends all data via wireless.
When the module receives the first user data, AUX outputs low level. When the module puts all data into the RF chip and starts transmitting, AUX outputs high level.
At this point, it indicates that the last packet of wireless data has been transmitted, and the user can continue to enter data.
Data packets sent through mode 0 can only be received by the receiving module in mode 0.
Receivi ng| The module is on the wireless receiving function all the time and can receive data packets from mode 0.
After receiving the data packet and the module AUX outputs a low level, it starts sending wireless data through the serial port TXD pin. After all wireless data is output through the serial port, the module outputs AUX high level.

6.3 RSSI Mode（Mode 1）

Type

|

M0 = 1 ， M1 = 0

---|---
Transmitti ng| No wireless transmission is allowed, the received serial data will be discarded.
Receiving| Can not receive air wireless data, only scan the signal strength of the current channel, and output a strength value (relative value) through the serial port every 100ms.
Numerical calculation method: signal strength =-(256 (decimal)-data (decimal)) dBm
If the hexadecimal value output by the serial port is 0x91, the actual signal strength is:-(256 (decimal)-145 (decimal)) =-111dBm

6.4 Setting Mode（Mode 2）

Type

|

M0 = 0 ， M1 = 1

---|---
transmit ting| No wireless transmission is allowed, the received serial data will be discarded.
receiving| Unable to receive wireless data
configure ation| Can be used for module parameter setting, use serial port 9600, 8N1, set module working parameters according to the specific instruction format
Note| When entering from the setting mode to other modes, the module will reconfigure the parameters. During the configuration, AUX remains low level;
It outputs a high level after finished, so it is recommended that the user detect the rising edge of AUX.

6.5 Sleep Mode（Mode 3）

Type

|

M0 = 1 ， M1 = 1

---|---
transmit ting| Unable to transmit wireless data
receiving g| Unable to receive wireless data
others| When the module is in the ultra-low power consumption state, all other functions of are turned off, and the sleep mode can only be exited through the state switch of M1M0.

6.6 Fast communication test

Step

|

Description

---|---
1| Connect E49-400T20D module to the E49-TBL backplane, and then plug into the USB test board (E15-USB-T2), plug into the computer to ensure that the driver has been installed correctly;

Plug in the mode selection jumper cap on the USB test board ( M1 = 0, M0 = 0)

2| Select 3.3V (the module supports 2.6 ~ 3.3V).
3| Run the “Serial Debug Assistant” software and select the correct serial port number and observe the sending window and the corresponding receiving window

Command format

Command mode (Mode 2: M0 = 0, M 1 = 1), the list of supported commands is as follows (when set, only 9600, 8N1 format is supported):

No.

| Command format|

Description

---|---|---
1| C0+operating parameter| Send C0 + 5 byte working parameters in hexadecimal format, a total of 6 bytes and must be sent continuously (save when power off)
2| C1+C1+C| Send three C1s in hexadecimal format. The module returns the saved parameters and must be sent continuously.
3| C2+operating parameter| Send C2 + 5 bytes working parameter in hexadecimal format, a total of 6 bytes and must be sent continuously(do not save when power off)
4| C3+C3+C3| Send three C3s in hexadecimal format. The module returns version information and must be sent continuously.

7.1 Factory default parameter

power
E49-400T20D| 433MHz| 0x0000| 0x2E| 2.4kbps| 9600| 20

7.2 Reading operating parameter

serial port (HEX format): C1 C1 C1, The module will return the current configuration parameters, such as: C0 00 00 18 20 00

7.3 Version number reading

serial port (HEX format): C3 C3 C3, The module will return the current configuration parameters, such as: C3 49 xx yy; 49 here represents the module model (E49 series), xx is the version number, and yy refers to other features of the module (users can ignore).

7.4 Parameter setting command

No.

| Item| Description|

Remark

---|---|---|---
0| HEAD| Fixed 0xC0 or 0xC2, it means this frame data is control command| l Must be 0xC0 or 0xC2
C0: Save the parameters when power off
C2: Do not save the parameters when power off
1| ADDH| High address byte of the module（default 00H）| 00H-FFH
2| ADDL| Low address byte of the module (default 0H）| 00H-FFH
3| SPE| Rate parameters, including serial rate and air rate 7，6：
Serial parity bit
00：8N1(default) 01：8O1
10：8E1
11：8N1
————————————————-
5，4，3      TTL serial speed (bps) 000: Serial baud rate is 1200 001: The serial port baud rate is 2400 010: The serial port baud rate is 4800 011: Serial baud rate is 9600 (default) 100: The serial port baud rate is 19200 101: Serial baud rate is 38400
110: Serial baud rate is 57600
111: Serial baud rate is 115200
2，1，0      Wireless air data rate （bps）
000：Air data rate is 1.2k
001：Air data rate is 2.4k（default） 010：Air data rate is 4.8k
011：Air data rate is 9.6k 100：Air data rate is 19.2k 101：Air data rate is 50k 110：Air data rate is 100k 111：Air data rate is 200k| —————————————-

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.
—————————————-

l  The lower the air data rate, the longer the transmitting distance, better anti-interference performance and longer transmitting time

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

4| CHAN| 7,，6，5，4，3，2，1，0 Communication channel Communication frequency（410M + CHAN * 0.5M）

（Default 0x2E: 433M）

| l   00H-C8Hl   correspond to 410~510 MHz
5| OPTION| 7， Fixed transmission enabling bit（similar to MODBUS） 0： Transparent transmission mode 1： Fixed transmission mode 6，5，4，3，2 Reserved bit, write 0 1, 0    Transmission power (approximation)| 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.
| | 00： 20 dBm（default）
01： 17 dBm
10： 14 dBm
11： 10 dBm| —————————————-

l   The external power must make sure the ability of current output more than 100mA and ensure the power supply ripple within 100mV. l      Low power transmission is not recommended due to its low power supply efficiency.

---|---|---|---
For example: The meaning of No.3 “SPED” byte:
The binary bit of the byte| 7| 6| 5| 4| 3| 2| 1| 0
Configured by users| 0| 0| 0| 1| 1| 0| 0| 1
Meaning| UART parity bit 8N1| UART baud rate is 9600| Air data rate 2.4k
Corresponding hexadecimal| 1| 9

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

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 absorbing wireless radio waves, 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.

9.2 Module is easy to damage

• Please check the power supply to ensure that it is between the recommended power supply voltage. If the maximum value is exceeded, the module will be permanently damaged.
• Please check the stability of power source, the voltage cannot 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 a limited range, some parts are sensitive to humidity.
• Please avoid using modules under too high or too low temperatures.

9.3 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;

Welding guidance

10.1 Reflow Soldering Temperature

3℃/second max
Liquidous Temperature (TL)| Liquid phase temperature| 183℃| 217℃
Time（tL）Maintained Above（TL）| Time above liquidus| 60-90 sec| 30-90 sec
Peak temperature（Tp）| Peak temperature| 220-235℃| 230-250℃
Aveage ramp-down rate（Tp to Tsmax）| Average descent rate| 6℃/second max| 6℃/second max
Time 25℃ to peak temperature| Time of 25 ° C to peak temperature| 6 minutes max| 8 minutes max

10.2 Reflow Soldering Curve

Related Model

Model No.

| Chip| ****

Frequenc y Hz

| Transmit power dBm| Test
distance km| Air data rate bps| Packagi ng| Size mm|

Antenna

---|---|---|---|---|---|---|---|---
E49-400T20S| –| 433M| 20| 1| 1.2k~200k| SMD| 26 * 16| IPEX/Stamp hole

Antenna guidance

12.1 Antenna recommendation
Antennas play an important role in the communication process, usually, low- quality antennas will greatly affect the communication system. Therefore, we recommend some antennas as supporting antennas of our company with excellent performance and reasonable price.

Model No.

| Type| Frequen cy Hz| Interface| Gain dBi| Height| Cable|

Function feature

---|---|---|---|---|---|---|---
TX433-NP-4310| Flexible PCB antenna| 433M| SMA-J| 2| 43.8*9.5mm| –| Built-in flexible FPC antenna
TX433-JW-5| Rubber antenna| 433M| SMA-J| 2| 50mm| –| Flexible &omnidirectional
TX433-JWG-7| Rubber antenna| 433M| SMA-J| 2.5| 75mm| –| Flexible &omnidirectional
TX433-JK-20| Rubber antenna| 433M| SMA-J| 3| 210mm| –| Flexible &omnidirectional
TX433-JK-11| Rubber antenna| 433M| SMA-J| 2.5| 110mm| –| Flexible &omnidirectional
TX433-XP-200| Sucker antenna| 433M| SMA-J| 4| 19cm| 200cm| Sucker antenna, high gain
TX433-XP-100| Sucker antenna| 433M| SMA-J| 3.5| 18.5cm| 100cm| Sucker antenna, high gain
TX433-XPH-300| Sucker antenna| 433M| SMA-J| 6| 96.5cm| 300cm| Car mounted sucker antenna, ultra-high gain
TX433-JZG-6| Rubber antenna| 33M| SMA-J| 2.5| 52mm| –| Short straight &omnidirectional
TX433-JZ-5| Rubber antenna| 433M| SMA-J| 2| 52mm| –| Short straight &omnidirectional
TX490-XP-100| Sucker antenna| 490M| SMA-J| 50| 12cm| 100cm| Sucker antenna, high gain
TX490-JZ-5| Rubber antenna| 490M| SMA-J| 50| 50mm| –| Short straight &omnidirectional

Batch packaging

Revision history

Version

| Date| Description|

Issued by

---|---|---|---
1.0| 2020-01-09| Initial version| Ren
1.1| 2020-11-16| Parameter correction| Linson
1.2| 2021-1-22| Parameter correction| Linson
1.3| 2021-6-23| Error correction| Linson

About us
Sales hotline: 4000-330-990
Tel: 028-61399028
Support: support@cdebyte.com
Website: www.ebyte.com
Address: Innovation Center B333~D347, 4# XI-XIN road, High-tech district (west), Chengdu, Sichuan, China

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