Ebyte E78-868LN22S Manuale utente

Chengdu Ebyte Electronic Technology Co., Ltd. E78-868LN22S User manual

E78-868LN22S User Manual

LoRaWAN Wireless Module

E78-868LN22S

Content

1. OVERVIEW.............................................................................................................................................................................................3

1.1 MAIN PARAMETER.......................................................................................................................................................... 3

1.2 PARAMETER DESCRIPTION.............................................................................................................................................3

2. TERMS AND DEFINITIONS................................................................................................................................................................. 4

3. MECHANICAL PROPERTIES...............................................................................................................................................................5

3.1 E78-868LN22S DIMENSIONS........................................................................................................................................ 5

3.2 PIN DEFINITION.............................................................................................................................................................. 5

3.3 RECOMMENDED CONNECTION DIAGRAM....................................................................................................................... 6

4. LORAWAN APPLICATION MODEL DIAGRAM................................................................................................................................7

5. ACCESS DEMO...................................................................................................................................................................................... 8

6. AT COMMAND.....................................................................................................................................................................................10

7. FAQ........................................................................................................................................................................................................ 27

7.1 COMMUNICATION RANGE IS TOO SHORT......................................................................................................................27

7.2 MODULE IS EASY TO DAMAGE..................................................................................................................................... 27

8. IMPORTANT STATEMENT.................................................................................................................................................................27

9. REVISION HISTORY........................................................................................................................................................................... 28

10. ABOUT US.......................................................................................................................................................................................... 28

E78-868LN22S

1. Overview

E78-868LN22S is a standard LoraWan node module designed and manufactured

by Chengdu Ebyte Electronic Technology Co., Ltd., working frequency band

EU863~870MMHZ, supports CLASS-A/CLASS-C node type, supports ABP/OTAA

two network access modes, and at the same time, this module With a variety of

low-power modes, the external communication interface uses a standard UART. Users

can easily access the standard LoraWan network through AT commands, making it an

excellent choice for IoT applications.

1.1 main parameter

Product

model

Core IC

Size

Net weight

working

temperature

Working

humidity

Storage

temperature

E78-868LN22

ASR6501

20* 14*2.8 mm

1.3±0.1g

-40 ~ 85℃

10% ~ 90%

-40 ~ 125°C

1.2 Parameter Description

When designing the power supply circuit for the module, it is recommended to reserve more than 30% of the

remaining amount, and the whole machine is conducive to long-term stable operation；

The current required for the instant of launch is large but often because the launch time is extremely short, the total

energy consumed may be smaller；

When the customer uses an external antenna, the impedance matching degree between the antenna and the module

at different frequency points will affect the magnitude of the emission current to varying degrees;

The current consumed by the RF chip in the pure receiving state is called the receiving current. Some RF chips

with communication protocols or developers have loaded some self-developed protocols on the whole machine,

which may cause the receiving current of the test to be too large；

The current in the purely receiving state is often mA level, and the "receiving current" of the μA level needs to be

processed by the developer through software;

The shutdown current is often much smaller than the current consumed by the power supply part of the whole

machine at no load, without being overly demanding;

Since the material itself has a certain error, a single LRC component has an error of ±0.1%. However, since a

plurality of LRC components are used in the entire RF loop, there is a case where error accumulation occurs,

resulting in a difference in emission current and reception current of different modules;

Reducing the transmit power can reduce power consumption to some extent, but reducing the transmit power

emissions for a number of reasons reduces the efficiency of the internal PA.

Chengdu Ebyte Electronic Technology Co., Ltd. E78-868LN22S User manual

2. Terms and definitions

2.1 LoRa

LoRa is one of the LPWAN communication technologies, the full name is Long Range Radio, which means “long-range

radio” in Chinese; the company that currently dominates the technology is the foreign semtech company;

LoRa's main ISM brand is available worldwide for free bands: 433MHz, 470MHz, 868MHz, 915MHz, etc.

Features: Low power consumption, long distance, low cost.

2.2 LoRaWAN

The LoRa Alliance is an open, non-profit organization led by Semtech in March 2015. The Alliance publishes a

low-power WAN standard based on the open source MAC layer protocol: the LoRaWAN protocol standard.

Network topology: star structure

Network composition: LoRa module, gateway (Gateway or base station), Server (including Network Server, Network

control, Application Server).

LoRaWAN divides the LoRa nodes into three categories: A/B/C:

Two-way transmission terminal(Class A)：

Class A's terminal will follow two short downlink receiving windows after each uplink to achieve two-way

transmission. The terminal arranges transmission time slots based on its own communication requirements, with a small

change on the basis of random time (ie, ALOHA protocol). This Class A operation provides the lowest power

consumption end system for the application, and only requires the application to perform downlink transmission of the

server in a short time after the terminal uplink transmission. The downstream transmission of the server at any other time

has to wait for the next uplink of the terminal.

Two-way transmission terminal delineating a reception slot(Class B)：

Class B terminals have more receive slots. In addition to Class A's random receive window, Class B devices also

open other receive windows at the specified time. In order for the terminal to open the receiving window at a specified

time, the terminal needs to receive a time-synchronized beacon (Beacon) from the gateway. This allows the server to

know when the terminal is listening.

Two-way transmission terminal that maximizes the reception slot (Class C)：

The terminal of Class C basically keeps the receiving window open, and only closes briefly when sending. Class C

terminals consume more power than Class A and Class B, but the delay from the server to the terminal is also the

shortest.

Note: The E78-470LN22S supports both Class A and Class C device types.

2.1.3 ADR

ADR Chinese is called adaptive data rate. In the loraWan network system, in order to maximize the battery life and

overall network capacity of the terminal device, the LoRaWAN network server separately manages the data rate and RF

output of each terminal device through an adaptive data rate (ADR) algorithm, through ADR technology, In the

LORAWAN system, the server automatically updates the rate of setting the node according to the signal receiving

capability of the node. The distance is far, the rate is low, and the distance is high, so the actual bandwidth greatly

improves the effective bandwidth and load capacity of the network.

E78-868LN22S

3. Mechanical properties

3.1 E78-868LN22S Dimensions

3.2 Pin definition

No.

Name

Direction

Function

GND

Ground wire, connected to the power reference

ground

VCC

Power supply, range 2.5-3.7v (external ceramic filter

capacitor is recommended)

SETB

Low power wake-up pin

DIO1

Input/output

NC (reserved pin)

BUSY

Input/output

NC (reserved pin)

I2C_SDA

Input/output

NC (reserved pin)

I2C_SCL

Input/output

NC (reserved pin)

UART_CTS

Input/output

NC (reserved pin)

UART_RTS

Input/output

NC (reserved pin)

GND

Ground wire, connected to the power reference

E78-868LN22S

ground

ANT

Antenna interface, stamp hole (50 ohm characteristic

impedance)

GND

Ground wire, connected to the power reference

ground

GND

Ground wire, connected to the power reference

ground

GND

Ground wire, connected to the power reference

ground

GND

Ground wire, connected to the power reference

ground

XRES

Input

External reset pins

ADC_IN

Input

NC (reserved pin)

AUX

Input/output

NC (reserved pin)

SETA

Input/output

NC (reserved pin)

UART_RX

Input/output

UART RX pin

UART_TX

Input/output

UART TX pin

SWD_DATA

Input/output

SWD Data pin

SWD_CLK

Input/output

SWD Clock pin

GND

Ground wire, connected to the power reference

ground

SPI_MISO

Input/output

SPI MISO test point, internally connected, cannot be

used as external SPI

SPI_NSS

Input/output

SPI NSS test point, internally connected, cannot be

used as an external SPI

SPI_MOSI

Input/output

SPI MOSI test point, internally connected, cannot be

used as an external SPI

SPI_SCK

Input/output

SPI SCK test point, internally connected, cannot be

used as external SPI

★For the pin definition, software driver and communication protocol of the module, please refer to ASR

official《ASR6501 Datasheet》 ★

3.3 Recommended connection diagram

Chengdu Ebyte Electronic Technology Co., Ltd. E78-868LN22S User manual

4. LoraWan application model diagram

The complete LoraWan network system consists of: node, gateway, Lora NetWork Server, application server, the

node is generally designed by LORA chip; the gateway is designed by SX1301 provided by semtech; Lora NetWork

Server now has open source loraserver or commercial TTN (The ThingsNetwork), users can build their own; application

server is designed and developed by users, mainly used for data exchange with Lora NetWork Server applications.

Chengdu Ebyte Electronic Technology Co., Ltd. E78-868LN22S User manual

5. Access demo

The demonstration kit is: E78-868LN22S as a node, E890 as a gateway to access the free TTN (TheThingsNetwork) test server

for communication test; node-side OTAA access mode corresponding settings are as follows:

On the TTN, the gateway data record is as follows:

The TTN node data record is as follows:

E78-868LN22S

Note: For the TTN creation device and corresponding configuration process, please refer to 《LORAWAN Node +

Gateway TTN Server Configuration Tutorial》

Chengdu Ebyte Electronic Technology Co., Ltd. E78-868LN22S User manual

6. AT command

a) Command format：

：Command prefix

CMD：Control command

[op]：Command operator。Can be the following:

“=”：indicates the parameter setting.

“?”：Indicates the current value of the query parameter.

“”：indicates the execution of the command.

“=?”：Indicates the parameters of the query setting instruction.

[para-n]：Indicates the set parameter value or specifies the parameter to be queried.。

<CR><LF>：Enter to change lines，ASCII 0x0D 0x0A

Command

Description (general order)

CGMI

Read the manufacturer's logo

CGMM

Read module identification

CGMR

Read version identifier

CGSN

Read product serial number identifier

CGBR

Set the baud rate of the UART

CJOINMODE

Set the read join mode (OTAA, ABP)

CDEVEUI

Set to read DevEUI (OTAA when entering the network)

CJOINMODE

Set the read join mode (OTAA, ABP)

CDEVEUI

Set to read DevEUI (OTAA when entering the network)

CAPPEUI

Set to read AppEUI (OTAA when entering the network)

CAPPKEY

Set to read AppKey (OTAA when entering the network)

CDEVADDR

Set to read DevAddr (ABP when entering the network)

CAPPSKEY

Set to read AppSkey (ABP when accessing the network)

CNWKSKEY

Set to read NwkSkey (ABP when accessing the network)

CFREQBANDMASK

Set the read frequency mask (FreqBandMask)

CULDLMODE

Set to read the Ul/Dl mode (same frequency or different

frequency)

CWORKMODE

Set the read working mode (normal working mode)

CCLASS

Set the read class type (Class A/C)

CBL

Read battery level

CSTATUS

Read node status

CJOIN

Initiate OTAA access to the network

DTRX

Send and receive data frames

DRX

Get the latest received data from Rx buffer and empty Rx buffer

Command

Description (MAC related configuration command)

CCONFIRM

Set the type of read send message (confirm or unconfirm)

CAPPPORT

Set the read application layer port

CDATARATE

Set the read data rate

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