Name: Ebyte E77-M22S Series
Brand: Ebyte
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Chengdu Ebyte Electronic Technology Co., Ltd. E77-xxxM22S User Manual

1 Product Overview

1.1Introduction 

E77-400/900M22S series products are standard LoraWan node modules designed and produced by Chengdu Yibaite

Electronic Technology Co., Ltd. E77-400M22S works in the frequency band 410~510 MHZ , E77-900M22S works in

the frequency band 868~930 MHZ, E77- 400M22S supports Lo Ra W AN 1.0.3 EU433/CN470 standard , E77-900M22S

supports Lo Ra W AN 1.0.4 EU868/US915/AU915/AS923/IN865/KR920/RU864 standard, and supports CLASS–

A/CLASS-C nodes Type, supports ABP/OTAA two network access methods. At the same time, the module has a variety

of low-power modes. The external communication interface uses standard UART. Users can access the standard

LoRaWAN network through simple configuration through AT commands. It is the current Excellent choice for IoT

applications.

E77-400M22S E77-900M22S

1.2 Features

 Under ideal conditions, using transparent transmission protocol , the communication distance can reach 5.6 km;

 Under ideal conditions, using Lo Ra W AN standard firmware, the communication distance can reach 3.5 km;

 The maximum transmit power is 21.5dBm , multi-level software adjustable;

 E77-400M22S supports the global license-free ISM 433/470MHz frequency band;

 E77-900M22S supports the global license - free ISM 868/915 MHz frequency band;

 E77-400M22S supports Lo Ra W AN 1.0.3 EU433/CN470 standard;

 E77-900M22S supports Lo Ra W AN 1.0.4 EU868/US915/AU915/AS923/IN865/KR920/RU864 standard;

 E77-400/900M22S supports two device types: Class A and Class C;

 ~12SF spreading factors launched to support dense networks ;

 Supports 1.8 ~ 3.6 V power supply, and any power supply greater than 3.3 V can ensure the best performance;

 The external crystal oscillator uses 32.768KHz, 32MHz high-precision industrial-grade crystal oscillator;

 14.0*20.0*2.7mm small size patch package, conducive to system integration development;

 Industrial grade standard design, supports long-term use at -40~+85℃;

 Optional dual antennas (IPEX/stamp hole) facilitate user secondary development and integration;

Ebyte E77-M22S Series User Manual

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