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E77-M22S Series
Ebyte E77-M22S Series User Manual
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Chengdu
Ebyte
Electronic
T
echnology
Co.,
Ltd.
E7
7-xxxM22S
User
Manual
Copyright
©
2012-2
0
24
,
Chengdu
Ebyte
Electro
nic
T
echnology
Co.
,
Ltd.
5
2.3
Electrical
parameters
Electrical
parameters
minimum
value
T
ypical
value
maximum
value
unit
condition
voltage
1.8
3.3
3.6
V
≥
3.3V
guarantees
output
po
wer
Exceeding
3.6
V
will
p
ermanently
b
urn
the
module
Communica
tion
level
-
3.3
-
V
It
is
rec
ommended
t
o
add
level
conversio
n
when
using
5.0
V
TTL
Emission
current
-
128
-
mA
Instantaneo
us
power
c
onsumption
receive
curr
ent
-
14
-
mA
——
E77-900M2
2S
Sleep
curr
ent
-
3
-
μ
A
Software
shutdown
E77-400M2
2S
Sleep
curr
ent
-
2
-
μ
A
Operating
temperatur
e
-40
20
85
℃
——
W
orking
humidity
10
60
90
%
——
Storage
temperatur
e
-40
20
125
℃
——
6
8
Table of Contents
Disclaimer and Copyright Notice
3
1 Product Overview
4
1.1Introduction
4
1.2 Features
4
1.3 Application scenarios
5
2 Specifications
5
2.1 RF parameters
6
2.2 Hardware parameters
6
2.3 Electrical parameters
7
2.4 Parameter description
7
3 Mechanical Dimensions and Pin Definitions
9
3.1 Dimensional drawing
9
3.2 Pin definition
9
3.3 Recommended connection diagram
11
4 Terms and Definitions
11
4.1LoRa
12
4.2 LoRaWAN
12
4.3 ADR
12
5 LoraWan application model diagram
13
6 Access Demonstration
14
7 AT Commands
15
7.1 Instruction format
16
8 Secondary Development
32
9 Data Rates of Each Frequency Band
34
10 Maximum power of each frequency band
36
12 Frequently Asked Questions
42
12.1 The communication distance is very close
43
12.2 Modules are easily damaged
43
12.3 Network access failed
43
Important statement
44
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Ebyte E77-M22S Series Specifications
General
Brand
Ebyte
Model
E77-M22S Series
Category
Wireless modules
Language
English
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