Chengdu Ebyte Electronic Technology E19 User Manual

User Manual

SX1276 Wireless Module

E19(915M30S) Series

SX1276 Wireless Module User Manual of E19(915M30S) Series Modules

Version

Date

Description

Issued by

1.00

2018/1/15

Initial version

huaa

This manual may be modified based on product upgrade, please refer to the latest version.

All rights to interpret and modify this manual belong to Chengdu Ebyte Electronic Technology Co., Ltd.

Brief Introduction

E19(915M30S) series wireless transceiver modules, operating at 903~927MHz (Default: 915MHz), are based on originally imported

RFIC SX1276 from SEMTECH, with transparent transmission available, TTL level, compatible with 3.3V. The modules adopt LoRa

spread-spectrum technology, which means the transmitting distance is much longer than before. The advantages of the modules are more

concentrated power density and better anti-interference performance. SX1276 is a meaningful milestone in low speed communication

which is favored by insiders. This series are applied in open and clear air, industrial and living areas with a few obstacles. 915MHz is a

North American frequency. Mass production has been conducted to export to North American countries.

Modules with transmitting power at 30dBm have PA and LNA to maintain the stability of communication and extend the distance of

communication. Modules with transmitting power at 20dBm apply industrial crystal oscillator to ensure the stability and consistency. The

accuracy is better than the most popular 10ppm. The series are widely applied in the following fields such as water, gas, electricity meters,

IoT reform and intelligent furniture. The module has the function of data encryption & compression. The data of the module transmitted

over the air feature randomness. With the rigorous encryption & decryption, data interception becomes pointless. The function of data

compression decreases the transmission time & probability of being interfered, while improving the reliability & transmission efficiency.

E19(915M30S) series strictly stick to the appearance design rules home and abroad like FCC, CE, CCC and meet the related RF

certifications and export standards.

SX1276 Wireless Module User Manual of E19(915M30S) Series Modules

CONTENTS

1. Features ............................................................................................................................................................ 4

2. Function Description ....................................................................................................................................... 5

2.1 Fixed Transmission ............................................................................................................................................................. 5

2.2 Broadcast Transmission ...................................................................................................................................................... 5

2.3 Broadcast Address .............................................................................................................................................................. 5

2.4 Monitor Address .................................................................................................................................................................. 5

2.5 Reset.................................................................................................................................................................................. 6

2.6 AUX Description ................................................................................................................................................................. 6

2.6.1 Indication of UART Output ................................................................................................................................................ 6

2.6.2 Indication of Wireless Transmitting .................................................................................................................................. 6

2.6.3 Configuration Procedure of Module ................................................................................................................................ 6

2.6.4 Notes for AUX ..................................................................................................................................................................... 7

3. Operating Mode .............................................................................................................................................. 7

3.1 Mode Switch ....................................................................................................................................................................... 7

3.2 Normal Mode (Mode 0) ....................................................................................................................................................... 8

3.3 Wake-up Mode (Mode 1) ..................................................................................................................................................... 8

3.4 Power-saving Mode (Mode 2) .............................................................................................................................................. 9

3.5 Sleep Mode (Mode 3) .......................................................................................................................................................... 9

4. Instruction Format........................................................................................................................................... 9

4.1 Default Parameter ............................................................................................................................................................... 9

4.2 Reading Operating Parameters ......................................................................................................................................... 10

4.3 Reading Version Number .................................................................................................................................................. 10

4.4 Reset Instruction ............................................................................................................................................................... 10

4.5 Parameter Setting Instruction ............................................................................................................................................ 10

5. Parameter Setting .......................................................................................................................................... 12

6. FAQ .................................................................................................................................................................. 12

6.1 Communication range is too short ..................................................................................................................................... 12

6.2 Module is easy to damage ................................................................................................................................................. 12

7. Important Notes ............................................................................................................................................ 13

8. About Us ......................................................................................................................................................... 13

SX1276 Wireless Module User Manual of E19(915M30S) Series Modules

1. Features

 LoRa: LoRa spread-spectrum means the transmitting distance is much longer than before. Confidentiality is high and the

possibility of being intercepted is extremely low. LoRa features strong ability of anti-interference, strong inhibitory capacity for the

co-channel interference and all kinds of noises, and excellent performance of anti multipath fading.

 Ultra-low power consumption: It supports WOR to reduce overall power consumption. In power-saving mode (Mode 2), it can

regulate overall power consumption by setting receiving response delay. The maximum receiving response delay can be configured

as 2000ms, and the average current is about 30uA.

 Fixed transmission: Module can communicate with other modules which work in different channels and addresses. It makes

networking and repeater easy. For example: module A transmits AA BB CC to module B (address: 0x00 01, channel: 0x80). The HEX

format is 00 01 80 AA BB CC (00 01 refers to the address of module B, and 80 refers to the channel of module B). Then module B

receives AA BB CC (only module B).

 Broadcast transmission: To set the module address as 0xFFFF, then the module can communicate with other modules in the

same channel.

 FEC: Forward Error Correction has high coding efficiency & good correction performance. In case of sudden interference, it can

correct the interfered data packets proactively, so that the reliability & transmission range are improved correspondingly. Without

FEC, those data packets can only be dropped.

 Sleep mode: When the module works in sleep mode (mode 3), it is available for configuration, not for transmitting & receiving.

The typical current is 6.0uA in this mode.

 Watchdog: With a built-in watchdog, the module runs precise layout and time. Once an exception occurs, the module will restart

in 0.107 second, and continue to work according to the previous parameters.

 Parameter saving: The parameters will be saved after setting and will not be reset when powered off. Once powered on, it will

work according to the previous parameters.

 Application: 915M is a North American frequency. Compared with 2.4G, it is better in penetration and diffraction but with less

speed rate.

SX1276 Wireless Module User Manual of E19(915M30S) Series Modules

2. Function Description

2.1 Fixed Transmission

2.2 Broadcast Transmission

2.3 Broadcast Address

 For example: Set the address of module A as 0xFFFF or 0 x0000, and 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.

2.4 Monitor Address

 For example: Set the address of module A as 0xFFFF or 0x0000, and channel as 0x04;

 When module A is the receiver, it can receive the data sent from all modules under channel 0x04. The purpose of monitor is realized.

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Chengdu Ebyte Electronic Technology E19 User Manual

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