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E22-400T22S User Manual

SX1268 434MHz SMD Wireless Module

Summary of content (19 pages)

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E22-400T22S User Manual SX1268 434MHz SMD Wireless Module
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CONTENTS 1. OVERVIEW........................................................................................................................................3 1.1 INTRODUCTION............................................................................................................................................................... 3 1.2 FEATURES....................................................................................................................................................................
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual 8.1 COMMUNICATION RANGE IS TOO SHORT........................................................................................................................ 14 8.2 MODULE IS EASY TO DAMAGE........................................................................................................................................ 15 8.3 BER(BIT ERROR RATE) IS HIGH.................................................................................
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual 1. Overview 1.1 Introduction E22-400T22S is a wireless serial port module (UART) based on SEMTECH's SX1268 RF chip. It has multiple transmission modes, working in the 434MHz, LoRa spread spectrum technology, TTL level output, compatible with 3.3V and 5V IO port voltage.
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual 1.3 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. 1.
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Chengdu Ebyte Electronic Technology Co., Ltd.  E22-400T22S User manual Watchdog: The module has a built-in watchdog and performs precise time layout. Once an exception occurs, the module will restart within 1 second and continue to work according to the previous parameter settings.  Parameter saving: After the user sets the parameters, the module parameters will be saved, the power will not be lost, and the module will work according to the set parameters after power-on.
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual bytes per packet to transmit Buffer 1000 Btye GFSK Modulation LoRa Communication interface UART Package SMD Connector 1.27mm Size 16 * 26 mm Antenna IPEX/stamp hole 50 ohm impedance 3 Size and pin definition No. Name Direction Function 1 GND Ground 2 GND Ground 3 GND Ground Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
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Chengdu Ebyte Electronic Technology Co., Ltd. 4 GND 5 M0 6 M1 7 RXD Input 8 TXD Output E22-400T22S User manual Ground Input （weak pull-up） Input （weak pull-up） Work with M1 to decide 4 working modes of module (not suspended, if not used, could be grounded). Work with M0 to decide 4 working modes of module (not suspended, if not used, could be grounded). TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can be configured as open-drain or pull-up input.
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual 4. Connect to MCU No. Description（STM8L MCU） 1 The UART module is TTL level. 2 For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin. 5 Function description 5.1 Fixed transmission Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual 5.2 Broadcasting transmission 5.3 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. 5.
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual 5.6 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. 5.6.1 Indication of UART output  To wake up external MCU 5.6.
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual 5.6.3 Configuration procedure of module  Only happened when power-on resetting or exiting sleep mode 5.6.4 Notes for AUX No. Description For function 1 & function 2 mentioned above, the priority should be given to the one with low level output, which means 1 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.
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual 6.1 Mode switching No. Remark  1      2    3   4   5 Users can combine M1 and M0 with high and low levels to determine the operating mode.
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual 6.3 WOR mode（Mode 1） Type M0 = 1，M1 =0 Transmitting Receiving When defined as a transmitting party, a preamble is automatically added before transmitting. It can receive data normally, the receiving function is the same as mode 0. 6.
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual 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.
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual 8.2 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.
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual 9.2 Reflow soldering curve 10 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.
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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S User manual 11 Package for batch order Revision history Version Date Description Issued by 1.00 2018-01-08 Initial version huaa 1.10 2018-04-16 Content updated huaa 1.20 2018-05-24 Content updated Huaa 1.21 2018-07-20 Model name revised Huaa 1.30 2018-10-23 Model No. split Huaa About us Technical support: support@cdebyte.com Documents and RF Setting download link: www.ebyte.
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FCC Statement This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.