EBYTE SX1278 433MHz 100mW SMD Wireless Module E19-433M20SC User Manual

: June 6, 2024
: ebyte

Table of Contents

EBYTE SX1278 433MHz 100mW SMD Wireless Module E19-433M20SC
Disclaimer
Overview
- Features
- Application
Specification and parameter
Size and pin definition
Basic operation
Basic application
FAQ
Production guidance
E19 Series
Antenna guidance
Package for batch order
Revision history
Read User Manual Online (PDF format)
Download This Manual (PDF format)

EBYTE SX1278 433MHz 100mW SMD Wireless Module E19-433M20SC

EBYTE SX1278 433MHz 100mW SMD Wireless Module
E19-433M20SC

Disclaimer

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The information contained herein is provided “as is” and EBYTE assumes no liability for the use of the information. No warranty, either express or implied, is given, including but not limited, with respect to the accuracy, correctness, reliability and fitness for a particular purpose of the information. This document may be revised by EBYTE at any time. For most recent documents, visit www.ebyte.com.

Overview

Brief introduction
E19-433M20SC is a small-sized 433MHz LoRaTM SMD wireless module, based on the original imported RF chip SX1278 from SEMTECH.

Overview

Due to the use of the imported SX1278 as the core of the module, with its stable and reliable characteristics, it is favored by the majority of users. Compared with the FSK、GFSK products, it has made great progress in receiving current, receiving sensitivity, transmitting power, receiving rate range and anti-interference ability. The module is aimed at smart home, wireless meter reading, scientific research and medical, and medium and long distance wireless communication equipment. Since RF performance and component selection are in accordance with industrial standards, and the product has obtained FCC, CE, RoHS and other international

authoritative certification reports, users do not need to worry about its performance. High precision 32MHz crystal is used.
Since the module is a pure RF transceiver module, you need to use the MCU driver or a dedicated SPI debug tool.

Features

Communication distance tested is up to 5km
Maximum transmission power of 100mW, software multi-level adjustable；
Support the global license-free ISM 833MH band；
Support air date rate of 0.018kbps~37.5kbp in LoRaTM；
The maximum data transmission rate 300kpbs in FSK mode；
Support multiple modulation methods, LoRaTM/FSK/GFSK/MSK/GMSK/OOK；
Large capacity FIFO, supports 256Byte data buffer；
Support 2.5V~3.6V power supply, power supply over 3.3V V can guarantee the best performance；
Industrial grade standard design, support -40 ~ 85 °C for working over a long time；
Stamp hole, good for secndary 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

Main parameter

| Performance|

Remark

---|---|---
Min.| Max.

Power supply（V）

|

0

|

3.6

| Voltage over 3.6V 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| /

Operating parameter

Main parameter

| Performance|

Remark

---|---|---
Min.| Typ.| Max.
Operating voltage（V）| 1.8| 3.3| 3.6| ≥3.3 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）| 410| 433| 441| Support ISM band
Power consumpti

on

| TX current（mA）| | 110| | Instant power consumption
RX current（mA）| | 14| |
Sleep current （μA）| | 1.0| | Software is shut down
Max Tx power（dBm）| 19| 20| 21|

Receiving sensitivity（dBm）

|

-145

|

-147

|

-148

| Sensitivity test conditions：

air data rate: 0.3 kbps, Coding rate 4/5, Spread Spectrum Factor 12.

Air data rate（bps）

| 1.2| –| 300| Kbps| FSK
0.018| –| 37.5| Kbps| LoraTM

Main parameter	Description	Remark

Distance for reference

|

5000m

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

antenna height: 2.5m，air data rate: 0.3kbps

Size and pin definition

Pin No	Pin item	Pin direction	Pin application
1	GND	Input	Ground electrode, connected to the power reference ground.
2	DIO5	Input / Output	Configurable IO interface(See more details in SX1278

11

| ****

VCC

| ****

Input

| Power supply 1.8V-3.6V DC. 3.3V and external ceramic filter capacitor are

recommended.）

12| SCK| Input| SPI clock
13| MISO| Output| SPI clock
14| MOSI| Input| SPI clock
---|---|---|---
15| NSS| Input| Chip select
16| TXEN| Input| Radio frequency switch control, make sure the TXEN pinis in high level, RXEN pin is in low level when transmitting.

17

| ****

RXEN

| ****

Input

| Radio frequency switch control, make sure the TXEN pinis in high level, RXEN pin is in low

level when transmitting.

18| GND| | Ground electrode, connected to the power reference ground.
19| GND| | Ground electrode, connected to the power reference ground.
20| ANT| Output| Antenna
21| GND| | Ground electrode, connected to the power reference ground.

Basic operation

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 cannot 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.

Software editing

SX1278/SX1276+PA+LNA，same drive way as SX1278/SX1276，user can refer to SX1278/SX1276 datasheet.
DIO0、DIO1、DIO2、DIO3、DIO4、DIO5 are configurable I/O ports for various application，see more in SX1278 datasheet. It can be floated when not used.
RST、TXEN、RXEN must be connected,among which RST control chip reset，TXEN, RXEN are for controlling RF switch.
Make it ground well with large space for grounding and small power ripple. Filter capacitor is necessary and make sure it is close to pin VCC and GND.
SPI communication rate should not be set too high, usually around 1Mbps.
In transmitting，set TXEN as high communication level，RXEN pin is low level; In receiving, set RXEN as high communication level,TXEN is low level; Before powering off, set TXEN、RXEN as low level.
Re-initialize register configuration when the chip is idle for higher stability.

Basic application

Basic circuit diagram

Basic application

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

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	60-120 sec
Average ramp-up rate(Tsmax to Tp)	Average ramp-up rate	3℃/second max

Tsmax）

|

Aveage 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

Production guidance

E19 Series

Model No.

| ****

IC

| ****

Frequency(Hz)

| Tx power

(dBm)

| Test distance

km

| ****

Package

| ****

Antenna

| ****

Model No.

---|---|---|---|---|---|---|---
E19-433M20S2| SX1278| 433M| 20| 5| SMD| 15 15| Stamp hole
E19-915M30S| SX1276| 915M| 30| 10| SMD| 25 40| Stamp hole /IPEX
E19-868M30S| SX1276| 868M| 30| 10| SMD| 25 40| Stamp hole /IPEX
E19-868M20S| SX1276| 868M| 20| 5| SMD| 17.625.2| Stamp hole
E19-433M30S| SX1278| 433M| 30| 10| SMD| 2537| Stamp hole
E19-915M20S| SX1276| 915M| 20| 5| SMD| 17.625.2| Stamp hole
E19-433M20SC| SX1278| 433M| 20| 5| SMD| 17.6*25.2| Stamp hole

Antenna guidance

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

| Interface| Gain

dBi

| Height| ****

Cable

| Function feature
---|---|---|---|---|---|---|---
TX433-NP-4310| FPC Antenna| 433M| SMA-J| 2| 43.8*9.5mm| –| FPC soft antenna
TX433-JW-5| Rubber| 433M| SMA-J| 2| 50mm| –| Flexible &omnidirectional
TX433-JWG-7| Rubber| 433M| SMA-J| 2.5| 75mm| –| Flexible &omnidirectional
TX433-JK-20| Rubber| 433M| SMA-J| 3| 210mm| –| Flexible &omnidirectional
TX433-JK-11| Rubber| 433M| SMA-J| 2.5| 110mm| –| Flexible &omnidirectional
TX433-XP-200| Sucker| 433M| SMA-J| 4| 19cm| 200cm| Sucker antenna, High gain
TX433-XP-100| Sucker| 433M| SMA-J| 3.5| 18.5cm| 100cm| Sucker antenna, High gain
TX433-XPH-300| Sucker| 433M| SMA-J| 6| 96.5cm| 300cm| Sucker antenna, High gain
TX433-JZG-6| Rubber| 433M| SMA-J| 2.5| 52mm| –| Short straight &omnidirectional
TX433-JZ-5| Rubber| 433M| SMA-J| 2| 52mm| –| Short straight &omnidirectional

Package for batch order

Revision history

Version	Date	Description	Issued by
1.00	2017/10/16	Initial version	huaa
1.10	2018/5/23	Content updated	huaa
1.20	2018/9/21	Model No. split	Huaa

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