Chengdu Ebyte Electronic Technology Co., Ltd. E77-xxxM22S User Manual
Content
Disclaimer and Copyright Notice ....................................................................................................................................... 1
1 Product Overview ..............................................................................................................................................................2
1.1 Introduction .......................................................................................................................................................2
1.2 Features ..................................................................................................................................................................... 2
1.3 Application scenarios ................................................................................................................................................ 3
2 Specifications ..................................................................................................................................................................... 4
2.1 RF parameters ........................................................................................................................................................... 4
2.2 Hardware parameters ................................................................................................................................................ 4
2.3 Electrical parameters .................................................................................................................................................5
2.4 Parameter description ............................................................................................................................................6
3 Mechanical Dimensions and Pin Definitions .................................................................................................................. 7
3.1 Dimensional drawing ................................................................................................................................................ 7
3.2 Pin definition .............................................................................................................................................................7
3.3 Recommended connection diagram ..........................................................................................................................9
4 Terms and Definitions .....................................................................................................................................................10
4.1LoRa .....................................................................................................................................................................10
4.2 LoRaWAN...............................................................................................................................................................10
4.3 ADR ........................................................................................................................................................................ 10
5 LoraWan application model diagram ........................................................................................................................... 11
6 Access Demonstration ..................................................................................................................................................... 12
7 AT Commands .................................................................................................................................................................14
7.1 Instruction format ....................................................................................................................................................14
7.2 AT command set ....................................................................................................................................................14
7.3 AT command description ...................................................................................................................................... 14
8 Secondary Development ................................................................................................................................................. 31
9 Data Rates of Each Frequency Band .............................................................................................................................33
10 Maximum power of each frequency band .................................................................................................................. 35
11 Maximum transmission load of each frequency band ............................................................................................... 38
12 Frequently Asked Questions ........................................................................................................................................ 40
12.1 The communication distance is very close ........................................................................................................... 41
12.2 Modules are easily damaged ............................................................................................................................ 41
12.3 Network access failed ........................................................................................................................................... 41
Important statement .......................................................................................................................................................... 42
Revise history ......................................................................................................................................................................42
About Us ..............................................................................................................................................................................42
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