Ebyte E78-915LN22S (6601) User manual

E78-915LN22S (6601)
ASR6601 LoraWan Wireless Module

Chengdu Ebyte Electronic Technology Co., Ltd. E78-915LN22S(6601) User Manual
Copyright © 2012–2022 , Chengdu Ebyte Electronic Technology Co., Ltd.
1
Contents
DISCLAIMER AND COPYRIGHT NOTICE ......................................................................................................................................................................2
1 PRODUCT OVERVIEW......................................................................................................................................................................................................... 3
1.1 INTRODUCTION ........................................................................................................................................................................................3
1.2 APPLICATION SCENARIOS ......................................................................................................................................................................3
2 PARAMETERS.......................................................................................................................................................................................................................... 4
2.1 MAIN PARAMETERS ................................................................................................................................................................................4
2.2 WORKING PARAMETERS ........................................................................................................................................................................4
2.3 HARDWARE PARAMETERS .....................................................................................................................................................................4
2.4 DEVELOPING NOTICE ............................................................................................................................................................................ 5
3 MECHANICAL DIMENSIONS AND PIN DEFINITION ........................................................................................................................................... 6
3.1 DIMENSIONS OF E78- 915 LN22S ( 6601).......................................................................................................................................6
3.2 PIN DEFINITION .......................................................................................................................................................................................7
3.3 RECOMMENDED WIRING DIAGRAM .................................................................................................................................................... 8
4 TERMS AND DEFINITIONS ............................................................................................................................................................................................... 9
2.1 LORA.........................................................................................................................................................................................................9
2.2 LORAWAN .............................................................................................................................................................................................9
2.3 ADRS........................................................................................................................................................................................................ 9
5 LORAWAN APPLICATION MODEL DIAGRAM ...................................................................................................................................................... 10
6 ACCESS DEMONSTRATION............................................................................................................................................................................................11
7 AT COMMANDS.................................................................................................................................................................................................................... 13
8 FREQUENTLY ASKED QUESTIONS ............................................................................................................................................................................ 31
8.1 THE COMMUNICATION DISTANCE IS VERY CLOSE ......................................................................................................................... 31
8.2 MODULE IS EASILY DAMAGED .......................................................................................................................................................... 31
IMPORTANT NOTICE .............................................................................................................................................................................................................31
REVISION HISTORY...............................................................................................................................................................................................................32
ABOUT US...................................................................................................................................................................................................................................32

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Disclaimer and Copyright Notice
Information in this document, including URL addresses for reference, is subject to change without
notice. Documentation is provided "as is" without warranty of any kind, including any warranties of
merchantability, fitness for a particular purpose, or non-infringement, and any warranties referred to
elsewhere in any proposal, specification or sample. No responsibility is assumed in this document,
including any liability for infringement of any patent rights arising out of the use of the information
in this document. This document does not hereby grant, by estoppel or otherwise, any license,
express or implied, to use any intellectual property rights.
The test data obtained in this article are all obtained by the Ebyte laboratory test, and the actual
results may be slightly different.All trade names, trademarks and registered trademarks mentioned
herein are the property of their respective owners and are hereby acknowledged.
Final interpretation right belongs to Chengdu Ebyte Electronic Technology Co., Ltd.
Note :
Due to product version upgrade or other reasons, the contents of this manual may be changed. Ebyte Electronic
Technology Co., Ltd. reserves the right to modify the contents of this manual without any notice or prompt. This
manual is only used as a guide. Chengdu Ebyte Electronic Technology Co., Ltd. does its best to provide accurate
information in this manual. However, Chengdu Ebyte Electronic Technology Co., Ltd. does not ensure that the
contents of the manual are completely error-free. All statements in this manual , information and advice do not
create any express or implied warranties.

Chengdu Ebyte Electronic Technology Co., Ltd. E78-915LN22S(6601) User Manual
Copyright © 2012–2022 , Chengdu Ebyte Electronic Technology Co., Ltd.
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1 Product Overview
1.1 Introduction
E78- 915 LN22S (6601) series products are standard LoraWan node modules
designed and produced by Chengdu Ebyte Electronic Technology Co., Ltd., operating
frequency band EU8 50 ~ 925 MHZ, support US915/EU868 standard, support
CLASS-A/CLASS-C node 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 adopts standard UART, the user can access the standard
LoraWan network through simple configuration of AT commands, which is the current
Internet of Things application. Excellent choice.
1.2 Application scenarios
Smart home and industrial sensors, etc.;
Security system, positioning system;
Wireless remote control, drone;
wireless game remote control;
healthcare products;
Wireless voice, wireless headset;
Automotive industry applications.

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2 Parameters
2.1 Main parameters
2.2 Working parameters
Parameter category
Min
Typ
Max
unit
Emission current ([email protected]kbps)
1 10
1 20
1 30
mA
Receive current ([email protected])
13
14
15
mA
off current
2.4
2.5
2.6
uA
transmit power
21.0
21.2
21.8
dBm
Receive sensitivity
-139
-140
-140
dBm
TCXO crystal oscillator
32
32
32
MHZ
TCXO crystal oscillator voltage configuration
1.8
1.8
3.3
V
Recommended working frequency band
850
868/900/915
925
MHZ
Supply voltage
2.5
3.3
3.7
V
communication level
2.5
3.3
3.7
V
2.3 Hardware parameters
The main parameters
describe
Remark
reference distance
5600m
Clear and open, antenna height 2 meters, air rate 1kbps
Crystal frequency
32MHz
-
Modulation
LoRa (recommended)
GFSK Mode, FLRC Mode, LoRa Mode
Packaging method
SMD
-
interface
1.27mm
-
Communication Interface
SPI
0 to 10Mbps
Dimensions
20*14mm
-
Antenna interface
IPEX/ stamp hole
Equivalent impedance is about 50 Ω
Product number
Core IC
size
Module net
weight
Operating
temperature
Working
humidity
Storage
temperature
E78-868LN22S (6601)
ASR6 601CB
20* 14*2.8mm
1.2g
-40 ~ 85℃
10% ~ 90%
-40 ~ 125°C

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2.4 Developing Notice
When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the margin, so
that the whole machine can work stably for a long time;
The current required at the moment of launch is larger, 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 size of the emission current to varying degrees;
The current consumed by the RF chip when it is 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 shutdown current is often far less than the current consumed by the power supply part of the whole machine when it is not
loaded, so it is not necessary to be too demanding;
Due to the material itself has a certain error, a single LRC element has an error of ±0.1%, but hesitant to use multiple LRC
elements in the entire RF circuit, there will be accumulation of errors, resulting in the difference between the transmitting current
and the receiving current of different modules;
Reducing the transmit power can reduce power consumption to a certain extent, but reducing the transmit power transmission
will reduce the efficiency of the internal PA for many reasons.

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3 Mechanical Dimensions and Pin Definition
3.1 Dimensions of E78- 915 LN22S ( 6601)

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3.2 Pin Definition
pin number
pin name
Pin Orientation
pin usage
1
GND
-
Ground wire, connected to the power reference ground
2
VCC
-
Power supply, range 2.5V~3.7V (It is recommended to add
external ceramic filter capacitors)
3
SETB
-
Low power wake-up pin
4
DIO1
input Output
NC (reserved pin)
5
BUSY
input Output
NC (reserved pin)
6
I2C_SDA
input Output
NC (reserved pin)
7
I2C_SCL
input Output
NC (reserved pin)
8
UART_CTS
input Output
NC (reserved pin)
9
UART_RTS
input Output
NC (reserved pin)
10
GND
-
Ground wire, connected to the power reference ground
11
ANT
-
Antenna interface, stamp hole (50 ohm characteristic
impedance)
12
GND
-
Ground wire, connected to the power reference ground
13
GND
-
Ground wire, connected to the power reference ground
14
GND
-
Ground wire, connected to the power reference ground
15
GND
-
Ground wire, connected to the power reference ground
16
XRES
enter
External reset pin
17
ADC_IN
enter
NC (reserved pin)
18
AUX
input Output
NC (reserved pin)
19
SETA
input Output
NC (reserved pin)
20
UART_RX
input Output
UART RX pin
twenty one
UART_TX
input Output
UART TX pin
twenty two
SWD_DATA
input Output
SWD Data pin
twenty three
SWD_CLK
input Output
SWD Clock pin
twenty four
GND
-
Ground wire, connected to the power reference ground
25
SPI_MISO
input Output
SPI MISO test point, connected internally, cannot be used
as external SPI
26
SPI_NSS
input Output
SPI NSS test point, connected internally, cannot be used as
external SPI
27
SPI_MOSI
input Output
SPI MOSI test point, connected internally, cannot be used
as external SPI
28
SPI_SCK
input Output
SPI SCK test point, connected internally, cannot be used as
external SPI
For the pin definition, software driver and communication protocol of the module, please refer to the "ASR6601
Datasheet"★

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3.3 Recommended wiring diagram

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4 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 currently leading the technology is a foreign semtech company;
The main ISM brand of LoRa is in free frequency bands around the world: 433MHz, 470MHz, 868MHz, 915MHz, etc.
Features: Low power consumption, long distance, low cost.
2.2 LoRaWAN
LoRa Alliance is an open, non-profit organization led by Semtech in March 2015. The alliance released a low-power wide area
network standard based on an open source MAC layer protocol: 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 LoRa nodes into three categories: A/B/C:
Two-way transmission terminal (Class A):
The terminal of Class A will follow two short downlink receiving windows after each uplink, so as to realize bidirectional
transmission. The terminal arranges transmission time slots based on its own communication requirements, with minor changes on the
basis of random time (ie, the ALOHA protocol). This Class A operation provides the terminal system with the lowest power
consumption for the application, and only requires the application to perform downlink transmission from the server within a short
time after the terminal uplink transmission. The downlink transmission performed by the server at any other time has to wait for the
next uplink from the terminal.
Two-way transmission terminal (Class B) that demarcates the receive time slot:
Class B terminals will have more receive slots. In addition to the random receive windows of Class A, Class B devices also open
other receive windows at specified times. 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 (Class C) that maximizes receive slots:
Class C terminals basically keep the receiving window open all the time, and only close briefly when sending. Class C terminals
consume more power than Class A and Class B terminals, but at the same time, the delay from the server to the terminal is the shortest.
Note: E78-868LN22S (6601) supports two types of equipment, Class A and Class C;
2.3 ADRs
ADR is called adaptive data rate in Chinese. In the loraWan network system, in order to maximize the battery life of the terminal
device and the overall network capacity, the LoRaWAN network server manages the data rate and RF output of each terminal device
separately through the Adaptive Data Rate (ADR) algorithm. In the LORAWAN system, the server automatically updates and sets the
rate of the node according to the signal receiving capability of the node. The rate is low when the distance is far, and the rate is high
when the distance is short. In practical applications, the effective bandwidth and load capacity of the network are greatly improved.

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5 LoraWan Application Model Diagram
The complete LoraWan network system consists of: nodes, gateways, Lora NetWork Server, and application servers. The nodes are
generally designed by Lora chips; the gateway is designed by SX1301 provided by semtech; ThingsNetwork), users can build it by
themselves; the application server is designed and developed by the user, mainly for exchanging application data with Lora NetWork
Server.

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6 Access Demonstration
This demonstration kit is: E78- 915 LN22S (6601) as a node, E890 as a gateway to access the free TTN (The Things Network)
test server for communication testing;
The corresponding settings of the OTAA access mode on the node side are as follows:
On TTN, the gateway information is as follows:

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The gateway data looks like this:
The TTN node data record is as follows:
Node serial port:
Note: Please refer to "LORAWAN Node + Gateway TTN Server Configuration Tutorial" for the TTN creation device and
corresponding configuration process

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7 AT Commands
a)Instruction format:
<CMD>[op][ para1, para2, para3,…]<CR><LF>
: command prefix
CMD: control directive
[op]: Instruction operator. Can be the following:
"=": Indicates parameter settings.
"?": Indicates the current value of the query parameter.
"": Indicates the execution of the command.
"=?": Indicates the parameters of the query setting command.
[para-n]: Indicates the set parameter value, or specifies the parameter to be queried
<CR><LF>: carriage return line feed, ASCII 0x0D 0x0A

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instruction
Description (common command)
CGMI
Read the manufacturer's logo
CGMM
Read the module ID
CGMR
Read version ID
CGSN
Read product serial number identification
CGBR
Set the baud rate of the UART
CJOINMODE
Set read Join mode (OTAA, ABP)
CDEVEUI
Set to read DevEUI (when OTAA is connected to the network)
CJOINMODE
Set read Join mode (OTAA, ABP)
CDEVEUI
Set to read DevEUI (when OTAA is connected to the network)
CAPPEUI
Set to read AppEUI (when OTAA is connected to the network)
CAPPKEY
Set to read AppKey (when OTAA is connected to the network)
CDEVADDR
Set to read DevAddr (when ABP is connected to the network)
CAPPSKEY
Set to read AppSkey (when ABP is connected to the network)
CNWKSKEY
Set to read NwkSkey (when ABP is connected to the network)
CFREQBANDMASK
Set the read frequency mask (FreqBandMask)
CULDLMODE
Set read Ul/Dl mode (same frequency or different frequency)
CWORKMODE
Set 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 network access
DTRX
Send and receive data frames
DRX
Get the latest received data from the Rx buffer and empty the Rx buffer
REGION
Setting Region (EU868/US915)
JOINDR
Set the network airspeed
Order
Description (MAC related configuration commands)
CCONFIRM
Set the type of read and send messages (confirm or unconfirm)
CAPPPORT
Set the read application layer Port
CDATARATE
Set read data rate
CRSSI
Get the RSSI value of the channel
CNBTRIALS
Set read NbTrans parameters
CRM
Set read report mode
CTXP
Set read transmit power
CLINKCHECK
Enable Link check
CADR
Enable or disable ADR
CRXP
Set read receive window parameters
CRX1DELAY
Set the delay for reading TX and RX1
CSAVE
save configuration
CRESTORE
restore default configuration
IREBOOT
System reset

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command
characters
Command
type
command format
response
CGMI
(Read the
manufacturer's
logo )
query
command
AT+CGMI?
+CGMI=<manufacturer>
OK
Parameter
Description
<manufacturer>: Manufacturer ID
Return value
description
Example
AT+CGMI?
+CGMI=Ebyte
OK
Precautions
command
characters
Command
type
command format
response
CGMM
(Read the
module ID )
query
command
AT+CGMM?
+CGMM=<model>
OK
Parameter
Description
<model>: Module ID
Return value
description
Example
AT+CGMM?
+CGMM=E78- 915 LN22S (6601)
OK
Precautions
command
characters
Command
type
command format
response
CGMR
(read version
ID )
query
command
AT+CGMR?
+CGMR=<revision>
OK
Parameter
Description
<revision>: version number
Return value
description
Example
AT+CGMR?
+CGMR=SF V1.0
OK
Precautions
command
characters
Command
type
command format
response
CGSN
(Read the
product serial
number logo )
query
command
AT+CGSN?
+CGSN=<sn>
OK
Parameter
Description
<sn>: Product serial number identification

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Return value
description
Example
AT+CGSN?
+CGSN=0539349E00032523
OK
Precautions
command
characters
Command
type
command format
response
CGBR
(set baud rate )
query
command
AT+CGBR?
+CGBR=<baud>
OK
set
command
AT+CGBR=<baud>
OK
Parameter
Description
<baud>: Product serial number identification
Return value
description
Example
AT+CGBR=9600
OK
Precautions
Baud range: 1200~ 9600 bps
command
characters
Command
type
command format
response
CJOINMODE
(Set the Join
method )
test
command
AT+CJOINMODE=?
+CJOINMODE: "mode "
OK
query
command
AT+CJOINMODE?
+CJOINMODE:<mode>
OK
set
command
AT+CJOINMODE=<mode>
OK
Parameter
Description
<mode>: Node Join mode
0: OTAA
1: ABP
Return value
description
Example
AT+CJOINMODE=0
OK
Precautions
Different mode nodes have different network access methods. Please use this command
to set ABP before sending data.
command
characters
Command
type
command format
response
CDEVEUI
(Set up
DevEUI )
test
command
AT+CDEVEUI=?
+CDEVEUI=<DevEUI:length is 16>
query
command
AT+CDEVEUI?
+CDEVEUI:<value>
OK
set
command
AT+CDEVEUI=<mode>
OK

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Parameter
Description
<mode>: Node DevEUI
Return value
description
Example
AT+CDEVEUI?
+CDEVEUI=AABBCCDD00112233
OK
Precautions
Set or read DevEUI, return Y1Y2 …Y8, hexadecimal format, value 8 bytes.
command
characters
Command
type
command format
response
CAPPEUI
(Set AppEUI )
test
command
AT+CAPPEUI=?
+CAPPEUI=<AppEUI:length is 16>
query
command
AT+CAPPEUI?
+CAPPEUI:<value>
OK
set
command
AT+CAPPEUI=<value>
OK
Parameter
Description
<value>: Node AppEUI
Return value
description
Example
AT+CAPPEUI=AABBCCDD00112233
OK
Precautions
Used in OTAA, set or read AppEUI, return Y1Y2 ... Y8, hexadecimal format, value 8
bytes.
command
characters
Command
type
command format
response
CAPPKEY
(Set AppKey )
test
command
AT+CAPPKEY=?
+CAPPKEY=<AppKey:length is 32>
query
command
AT+CAPPKEY?
+ CAPPKEY:<value>
OK
set
command
AT+CAPPKEY =<value>
OK
Parameter
Description
<value>: Node AppEUI
Return value
description
Example
AT+CAPPKEY=AABBCCDD00112233AABBCCDD00112233
OK
Precautions
Used in OTAA, set or read AppKey, return Y1Y2 ... Y16, hexadecimal format, value 16
bytes.
command
characters
Command
type
command format
response

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CDEVADDR
(Set DevAddr )
test
command
AT+CDEVADDR=?
+CDEVADDR=<DevAddr:length is 8, Device address
of ABP mode>
query
command
AT+CDEVADDR?
+CDEVADDR:<value>
OK
set
command
AT+CDEVADDR =<value>
OK
Parameter
Description
<value>: Node DevAddr
Return value
description
Example
AT+CDEVADDR=00112233
OK
Precautions
Used in ABP, set or read DevAddr, return Y1Y2 …Y4, hexadecimal format, value 4
bytes.
command
characters
Command
type
command format
response
CAPPSKEY
( Set AppSKey )
test
command
AT+CAPPSKEY=?
+CAPPSKEY=<AppSKey:length is 32>
query
command
AT+CAPPSKEY=<value>
+CAPPSKEY:<value>
OK
set
command
AT+CDEVADDR =<value>
OK
Parameter
Description
<value>: Node AppSKey
Return value
description
Example
AT+CAPPSKEY=AABBCCDD00112233AABBCCDD00112233
OK
Precautions
Use, set or read AppSKey in ABP, return Y1Y2 …Y16, hexadecimal format, value 16
bytes.
command
characters
Command
type
command format
response
CNWKSKEY
(set NwkSKey )
test
command
AT+CNWKSKEY=?
+CNWKSKEY =<NwkSKey:length is 32>
query
command
AT+CNWKSKEY?
+CNWKSKEY:<value>
OK
set
command
AT+CNWKSKEY=<value>
OK
Parameter
Description
<value>: Node NwkSKey
Return value
description
Example
AT+CNWKSKEY=AABBCCDD00112233AABBCCDD00112233

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OK
Precautions
Use, set or read NwkSKey in ABP, return Y1Y2 …Y16, hexadecimal format, value 16
bytes.
CFREQBANDM
ASK
(set band
mask )
Command
type
command format
response
test
command
AT+CFREQBANDMASK=?
+CFREQBANDMASK: "mask"
OK
query
command
AT+CFREQBANDMASK?
+CFREQBANDMASK:<mask>
OK
set
command
AT+CFREQBANDMASK=<m
ask>
OK
Parameter
Description
<mask>: The frequency mask that the network may work with, 16bit corresponds to 16
frequency groups, see LoRaWAN access specification for details.
For example: 0-7 channel, the corresponding mask is 0001, 8-15 channel corresponding
mask is 0002, and so on
Return value
description
Example
AT+CFREQBANDMASK=0001
OK
Precautions
It needs to be set before Join.
command
characters
Command
type
command format
response
CULDLMODE
(Set the same
and different
frequency of
uplink and
downlink )
test
command
AT+CULDLMODE=?
+CULDLMODE: "mode "
OK
query
command
AT+CULDLMODE?
+CULDLMODE:<mode>
OK
set
command
AT+CULDLMODE=<mode>
OK
Parameter
Description
<mode>:
1: Same frequency mode
2: Different frequency mode
Return value
description
Example
AT+CULDLMODE=2
OK
Precautions
Need to set before Join
command
characters
Command
type
command format
response
CWORKMODE
(Set working
mode )
test
command
AT+CWORKMODE=?
+CWORKMODE: "mode "
OK
query
command
AT+CWORKMODE?
+CWORKMODE:<mode>
OK
set
command
AT+CWORKMODE=<mode>
OK
Parameter
Description
<mode>:
2: normal working mode