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Chengdu Ebyte Electronic Technology Co., Ltd.

E22-900M30S User manual

Copyright ©2012–2018, Chengdu Ebyte Electronic Technology Co.,Ltd.

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the digital part of the module and routed in the Bottom Layer.

Assuming the module is soldered or placed in the Top Layer, it is also wrong to randomly route the Bottom Layer or
other layers, which will affect the module's spurs and receiving sensitivity to varying degrees.

Assume that there are traces with large electromagnetic interference around the module (high-frequency digital,
high-frequency analog, power trace), which 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 and also have a 2.4GHz TTL protocol, for example: USB3.0

The antenna mounting structure 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 of the case.

The antenna must not be installed inside the metal case, which will greatly reduce the transmission distance.

It is recommended to add a 200R protection resistor to the RXD/TXD of the external MCU.

4.2 Software Programming

This module is SX1268/PA+LNA. Its driving mode is exactly the same as SX1268/SX1262. Users can
operate according to SX1268/SX1262 chip datasheet.

DIO1 and DIO2 are general-purpose IO ports, which can be configured into multiple functions. DIO2 can be
connected to TXEN and not connected to the MCU's IO port. It can be used to control the RF switch transmission.
If not used, you can hang it. For details, see the SX1262 manual.

DIO 3 is used to supply 32 MHz TCXO crystal oscillator.

5. FAQ

5.1 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 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).

When the power supply at room temperature is lower than the recommended low voltage, the lower the voltage is,
the lower the transmitting power is.

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

5.2 Module is easy to damage

Please check the power supply and ensure it is within the recommended range. Voltage higher than the peak will
lead to a permanent damage to the module.

Please check the stability of power supply and ensure the voltage not to fluctuate too much.

Содержание E22-900T22S

Страница 1: ...E22 900M30S User Manual SX1262 868 915MHz 1W SPI LoRa Module...

Страница 2: ...arameter 3 2 1 Limit parameter 3 2 2 Operating parameter 3 3 Size and pin definition 5 4 Basic Operation 6 4 1 Hardware Design 6 4 2 Software Programming 8 5 FAQ 8 5 1 Communication range is too short...

Страница 3: ...uction use modification or disclosure to third parties of this document or any part thereof without the express permission of EBYTE is strictly prohibited The information contained herein is provided...

Страница 4: ...on products This products obtained FCC CE and RoHS certification already so users do not need to worry about the performance Adopted industrial grade high precision 32MHz crystal the product can cover...

Страница 5: ...nent 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 Ty...

Страница 6: ...rk Distance for reference 12000m Test condition clear and open area antenna gain 5dBi antenna height 2 5m air data rate 0 3kbps FIFO 256Byte Maximum length of single transmission Crystal frequency 32M...

Страница 7: ...wire connected to the power reference ground 5 GND Ground wire connected to the power reference ground 6 RXEN Input RF switch receiving control pin connected to external microcontroller IO valid in hi...

Страница 8: ...details 14 BUSY Output For status indication see SX1262 manual for details 15 NRST Input Chip reset trigger input pin valid in low level 16 MISO Output SPI data output pin 17 MOSI Input SPI data outp...

Страница 9: ...ible 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 If the reverse connection is connected the modul...

Страница 10: ...the RXD TXD of the external MCU 4 2 Software Programming This module is SX1268 SX1262 PA LNA Its driving mode is exactly the same as SX1268 SX1262 Users can operate according to SX1268 SX1262 chip dat...

Страница 11: ...characters and ensure the reliability of the power supply If the extension cable or feeder is of poor quality or too long the bit error rate will be high 6 Welding operation guidance 6 1 Reflow Solde...

Страница 12: ...wer dBm Test distance km Packaging Size mm Communication Interface E22 900T22S SX1262 868M 915M 22 7 SMD 16 26 UART E22 230T22S SX1262 230M 22 7 SMD 16 26 UART E22 400T22S SX1268 433M 470M 22 7 SMD 16...

Страница 13: ...1 0 2018 9 18 Original version huaa 1 1 2019 2 17 Content added Ray 1 2 2019 04 03 Model No split Ray 1 3 2020 09 09 Content change Switch 1 4 2020 11 26 Error correction Linson About us Website www...

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