Ebyte E77-M22S Series - Specifications; RF parameters; Hardware parameters

Chengdu Ebyte Electronic Technology Co., Ltd. E77-xxxM22S User Manual
Copyright © 2012-2 024 , Chengdu Ebyte Electronic Technology Co., Ltd.
4
2 Specifications
2.1 RF parameters
2.2 Hardware parameters
Hardware
parameters
Parameter value
Remark
IC full name
STM32WLE5CCU6
——
Kernel
Cortex-M4
——
FLASH
256 KB
——
RAM
64 KB
——
Crystal
frequency
32MHz /32.768KHz
External temperature compensated crystal
oscillator
Size
14*20mm
——
Antenna form
IPEX/stamp hole
Equivalent impedance is about 50 Ω
Communication
Interface
UART
The factory comes with LoRaWAN protocol
firmware
UART, SPI, I²C, GPIO, ADC
Users need to develop their own settings
Packaging
method
patch stamp hole
——
RF parameters
Parameter
value
Remark
E77-400M22S
Working
frequency
410 ~ 510
MHz
Support ISM frequency band
E77-900M22S
Working
frequency
850 ~ 930
MHz
Transmit
power
0 ~
21.5dBm
The software is adjustable and requires users to develop settings by themselves.
Receive
sensitivity
-118dBm
GFSK, airspeed 1.2 kbps
Spreading
factor
5 ~ 12
——
Measured
distance
3.5km
LoRaWAN protocol, clear and open environment, antenna gain 3.5dBi, height 2m
5.6 km
Transparent transmission protocol (see demo routine for details), clear and open
environment, antenna gain 3.5dBi, height 2m