Chengdu Yibaite Electronic Technology Co., Ltd
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    Building B2 and Building B5, No. 199 Xiqu Avenue, Gaoxin West District, Chengdu City, Sichuan Province
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E78-900M22S1A
Air speed bps:-
Product details

E78_01
E78_02
E78_04
E78_06E78_07
E78_08E78_09
E78_10
E78_11
E78_13
E78_17

Hardware parameters Parameter values
notes
Working voltage (V)
1.8~3.7

≥ 3.3V ensures output power

Communication level (V)
3.3

There is a risk of burning out when using 5V TTL

Working temperature (℃)
-40~+85

Industrial grade design

Working frequency band (MHz)
850~925

Support ISM frequency band

Emission current (mA)
145

Instantaneous power consumption

Receiving current (mA)
13

-

Sleep current (μ A)
2.0

Software shutdown

Maximum transmission power (dBm)
22

-

Receiving sensitivity (dBm)
-122~-126

The air speed is 595kbps

Communication rate LoRa (bps)
62.5k

User programmable customization

Communication rate GFSK (bps)
300K

User programmable customization

Reference distance
5500m

Clear and spacious, with an antenna gain of 5dBi, an antenna height of 2.5 meters, and an air speed of 2.4kbps

crystal frequency
32MHz

Active temperature compensated crystal oscillator

Modulation Type
LoRa (recommended)

GFSK ,LoRa

Packaging method
Surface mount type

-

Interface method
Stamp hole

Distance 1.1mm

External dimensions
26*16mm

-

Radio Frequency Interface
IPE/Stamp Hole

Equivalent impedance is about 50 Ω

E78_15

Serial Number
Pin Pin direction Pin usage
1 GND
-

Ground wire, connected to the power reference ground

2 LCD-SEG10
input/output

Microcontroller GPIO

3 LCD-SEG11
input/output

Microcontroller GPIO

4 LCD-SEG12
input/output

Microcontroller GPIO

5 LCD-SEG13
input/output

Microcontroller GPIO

6 LCD-SEG14
input/output

Microcontroller GPIO

7 LCD-SEG15
input/output

Microcontroller GPIO

8 LCD-SEG16
input/output

Microcontroller GPIO

9 LCD-SEG17
input/output

Microcontroller GPIO

10 I2C-SDA
input/output

I2C-SDA pin

11 I2C-SCL
input/output

I2C-SCL pin

12 ADC-IN0
input

ADC input pin

13 ADC-IN1
input

ADC input pin

14 GPIO2
input/output

Microcontroller GPIO

15 GPIO3
input/output

Microcontroller GPIO

16 GPIO4
input/output

Microcontroller GPIO

17 ADC_IN2
input

ADC input pin

18 GND
-

Ground wire, connected to the power reference ground

19 ANT
output

Antenna interface, stamp hole (50 ohm characteristic impedance)

20 GND
-

Ground wire, connected to the power reference ground

21 GND
-

Ground wire, connected to the power reference ground

22 GND
-

Ground wire, connected to the power reference ground

23 GND
-

Ground wire, connected to the power reference ground

24 SPI-NSS
input

SPI selection pin, can choose external SPI

25 SPI-SCK
input

SPI-SCK pin, can be used as an external SPI

26 SPI_MISO
output

SPI_SISO pin, can be used as an external SPI

27 SPI_MOSI
input

SPI MOSI pin, can be used as an external SPI

28 LCD-SEG1
-

Microcontroller GPIO

29 LCD-SEG2
input/output

Microcontroller GPIO

30 SWIM
input/output

Program burning pins

31 NRST
input

External reset pin

32 LCD-COM0
input/output

Microcontroller GPIO

33 LCD-COM1
input/output

Microcontroller GPIO

34 LCD-COM2
input/output

Microcontroller GPIO

35 VREFP
input

ADC reference voltage input

36 UART1-RX
input

UART1-RX pin

37 UART1-TX
output

UART1-TX pin

38 VLCD
input

VLCD pin

39 LCD-SEG0
input/output

Microcontroller GPIO

40 GND
-

Ground wire, connected to the power reference ground

41 LCD-SEG3
input/output

Microcontroller GPIO

42 LCD-COM3
input/output

Microcontroller GPIO

43 LCD-SEG4
input/output

Microcontroller GPIO

44 LCD-SEG5
input/output

Microcontroller GPIO

45 UART0-RX
input

UART0-RX pin

46 UART0-TX
output

UART0-TX pin

47 LCD-SEG6
input/output

Microcontroller GPIO

48 LCD-SEG7
input/output

Microcontroller GPIO

49 LCD-SEG8
input/output

Microcontroller GPIO

50 LCD-SEG9
input/output

Microcontroller GPIO

51 VCC
-

Power supply, range 1.8V~3.7V (it is recommended to add ceramic filter capacitors externally)

52 GND
-

Ground wire, connected to the power reference ground

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