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Chengdu Ebyte Electronic Technology Co., Ltd.

E19-433M20S2 User Manual

Copyright ©2012–2020

Chengdu Ebyte Electronic Technology Co.,Ltd.

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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.

4.2 Software editing

SX1278/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.

Summary of Contents for E19-433M20S2

Page 1: ...E19 433M20S2 User Manual SX1278 433MHz 100mW SMD Wireless Module...

Page 2: ...Operating parameter 3 3 Size and pin definition 4 4 Basic operation 5 4 1 Hardware design 5 4 2 Software editing 6 5 Basic application 7 5 1 Basic circuit diagram 7 6 FAQ 7 6 1 Communication range is...

Page 3: ...n 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 precis...

Page 4: ...nt 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...

Page 5: ...32MHz Modulation LoRaTM recommended FSK GFSK MSK GMSK OOK Package SMD Connector 1 27mm Communication interface SPI 0 10Mbps Size 15 15 mm Antenna Stamp hole 50 ohm impedance 3 Size and pin definition...

Page 6: ...erwise 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 sup...

Page 7: ...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 out...

Page 8: ...lect 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...

Page 9: ...el 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 7 P...

Page 10: ...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...

Page 11: ...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...

Page 12: ...Technical support support cdebyte com Documents and RF Setting download link www ebyte com Thank you for using Ebyte products Please contact us with any questions or suggestions info cdebyte com Offi...

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