Ebyte E32-433T20DT User manual

E32-433T20DT User Manual
SX1278 433MHz 100mW DIP Wireless Module

Chengdu Ebyte Electronic Technology Co,;Ltd E32-433T20DT user manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd. 1
CONTENT
1. OVERVIEW.................................................................................................................................. 3
1.1 INTRODUCTION..............................................................................................................................................................3
1.2 FEATURES...................................................................................................................................................................... 3
2. SPECIFICATION AND PARAMETER..................................................................................... 4
2.1 LIMIT PARAMETER.........................................................................................................................................................4
2.2 OPERATING PARAMETER................................................................................................................................................4
3 SIZE AND PIN DEFINITION.........................................................................................................5
4 CONNECT TO MCU....................................................................................................................... 6
5 FUNCTION DESCRIPTION.......................................................................................................... 6
5.1 FIXED TRANSMISSION....................................................................................................................................................6
5.2 BROADCASTING TRANSMISSION....................................................................................................................................7
5.6.1 Indication of UART output.................................................................................................................................... 8
5.6.2 Indication of wireless transmitting........................................................................................................................ 8
5.6.3 Configuration procedure of module...................................................................................................................... 9
5.6.4 Notes for AUX........................................................................................................................................................ 9
6 OPERATING MODE.....................................................................................................................10
6.1 MODE SWITCH............................................................................................................................................................ 10
6.2 NORMAL MODE (MODE 0)........................................................................................................................................... 11
6.3 WAKE-UP MODE (MODE 1).......................................................................................................................................... 11
6.4 POWER-SAVING MODE (MODE 2).................................................................................................................................11
6.5 SLEEP MODE (MODE 3)................................................................................................................................................12
7 COMMAND FORMAT..................................................................................................................12
7.1 DEFAULT PARAMETERS................................................................................................................................................12
7.2 READING OPERATING PARAMETERS.............................................................................................................................13
7.3 READING VERSION NUMBER........................................................................................................................................13
7.4 RESET COMMAND........................................................................................................................................................13
7.5 PARAMETER SETTING COMMAND................................................................................................................................ 13
8. HARDWARE DESIGN.................................................................................................................15
9 FAQ..................................................................................................................................................16

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9.1 COMMUNICATION RANGE IS TOO SHORT..................................................................................................................... 16
9.2 MODULE IS EASY TO DAMAGE.................................................................................................................................... 17
9.3 BER(BIT ERROR RATE)IS HIGH..................................................................................................................................17
10 PRODUCTION GUIDANCE...................................................................................................... 17
11 E32 SERIES.................................................................................................................................. 17
12 ANTENNA RECOMMENDATION............................................................................................18
13 PACKAGE FOR BATCH ORDER.............................................................................................19
REVISION HISTORY...................................................................................................................... 20
ABOUT US......................................................................................................................................... 20

Chengdu Ebyte Electronic Technology Co,;Ltd E32-433T20DT user manual
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1. Overview
1.1 Introduction
E32-433T20DT is a wireless serial port module
(UART) based on SEMTECH's SX1278 RF chip. It has
multiple transmission modes, working in the
410MHz~441MHz, (default 433MHz), LoRa spread
spectrum technology,
SX1278 features LoRa™, which will bring longer
communication distance, and has the advantages of concentrated power density, meanwhile it has a very strong
confidentiality. the modules of 20dBm transmitting power adopt industrial grade crystal oscillators to ensure the stability
and consistency, its precision is lower than the widely adopted 10ppm. E32-433T20DC is in stable bulk production and
are widely applied in utility meters, IoT renovation, smart home, etc. The modules feature data encryption and
compression. The data transmitted over the air features randomness. The encryption-decryption algorithm makes data
interception meaningless. Data compression enables shorter transmitting time and lower rate of being interfered, which
increases the reliability and transmitting efficiency.
1.2 Features
Communication distance tested is up to 3km
Maximum transmission power of 100mW, software multi-level adjustable；
Support the global license-free ISM 433 MHz band；
Support air date rate of 0.3kbps～19.2kbps；
Support new generation LoRa technology based on SX1262；
Low power consumption for battery supplied applications；
Support 3.3V~5.5V power supply, power supply over 5.0 V can guarantee the best performance；
Industrial grade standard design, support -40 ~ 85 °C for working over a long time；
IPEX and stamp hole optional, good for secondary development and integration.
1.3 Application
Home security alarm and remote keyless entry；
Smart home and industrial sensors；
Wireless alarm security system；
Building automation solutions；
Wireless industrial-grade remote control；
Health care products；
Advanced Meter Reading Architecture(AMI)；
Automotive industry applications.

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2. Specification and parameter
2.1 Limit parameter
Main parameter
Performance
Remark
Min.
Max.
Power supply（V）
0
5.5
Voltage over 5.5V will cause permanent damage to module
Blocking power（dBm）
-
-10
Chances of burn is slim when modules are used in short distance
Operating temperature（℃）
-40
85
-
2.2 Operating parameter
Main parameter
Performance
Remark
Min
Typ.
Max.
Operating voltage（V）
2.3
5.0
5.5
≥5.0 V ensures output power
Communication level（V）
-
3.3
-
For 5V TTL, it may be at risk of
burning down
Operating temperature（℃）
-40
-
85
Industrial design
Operating frequency（MHz）
410
-
525
Support ISM band
Power
consumptio
n
Transmitting current [mA]
-
106
Instant power
consumption
Instant power consumption
Receiving current [mA]
-
15
-
-
Turn-off current [μA]
-
4
-
Software is shut down
Max Tx power（dBm）
19.0
-
20.0
-
Receiving sensitivity（dBm）
-144
-146
-147
Air data rate is 2.4kbps
Air data rate（bps）
0.3k
2.4k
19.2k
Controlled via user’s programming
Main parameter
Description
Remark
Distance for reference
3000m
Test condition：clear and open area, antenna gain: 5dBi，
antenna height: 2.5m，air data rate: 2.4kbps
TX length
58 Byte
Maximum capacity of single package
Buffer
512 Byte
-
Modulation
LoRa™
-
Communication interface
TTL
@3.3V
Package
DIP
-
Connector
2.54mm
-
Size
21 * 36mm
-
Antenna
SMA-K
50 ohm impedance

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3 Size and pin definition
No.
Name
Direction
Function
1
M0
Input
（weak pull-up）
Work with M1 to decide 4 working modes of module (not
suspended, if not used, could be grounded).
2
M1
Input
（weak pull-up）
Work with M0 to decide 4 working modes of module (not
suspended, if not used, could be grounded).
3
RXD
Input
TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can
be configured as open-drain or pull-up input.
4
TXD
Output
TTL UART outputs, connects to external RXD (MCU, PC) input
pin. Can be configured as open-drain or push-pull output
5
AUX
Output
To indicate module 's working status & wakes up the external
MCU. During the procedure of self-check initialization, the pin

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outputs low level. Can be configured as push-pull output
(suspending is allowed).
6
VCC
Input
Power supply ：2.3~ 5.2V DC
7
GND
Input
Ground
8
Fixed orifice
-
Fixed orifice
9
Fixed orifice
-
Fixed orifice
10
Fixed orifice
-
Fixed orifice
4 Connect to MCU
No.
Description（STM8L MCU）
1
The UART module is TTL level.
2
For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.
5 Function description
5.1 Fixed transmission

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5.2 Broadcasting transmission
5.3 Broadcasting address
For example: Set the address of module A as 0xFFFF or 0x0000, and the channel as 0x04;
When module is the transmitter (transparent transmission), all modules under channel 0x04 will receive the data, the
purpose of broadcast is realized.
5.4 Monitor address
For example: Set the address of module A as 0xFFFF or 0x0000, and the channel as 0x04;
When module A is the receiver, it can receive the data sent from all modules under channel 0x04, the purpose of

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monitor is realized.
5.5 Reset
When the module is powered, AUX outputs low level immediately, conducts hardware self-check and sets the
operating mode based on user’s parameters. During the process, the AUX remains low level. After the process
completed, the AUX outputs high level and starts to work as per the operating mode combined by M1 and M0.
Therefore, users need to wait the AUX rising edge as the start of module’s normal work.
5.6 AUX description
AUX Pin can be used as indication for wireless send & receive buffer and self-check.
It can indicate whether there are data that are not sent yet via wireless way, or whether all wireless data has been
sent through UART, or whether the module is still in the process of self-check initialization.
5.6.1 Indication of UART output
To wake up external MCU
5.6.2 Indication of wireless transmitting
Buffer (empty): the internal 512 bytes data in the buffer are written to the RFIC (Auto sub-packaging).
When AUX=1, the user can input data less than 512 bytes continuously without overflow. Buffer (not empty): when
AUX=0, the internal 512 bytes data in the buffer have not been written to the RFIC completely. If the user starts to
transmit data at this circumstance, it may cause overtime when the module is waiting for the user data, or
transmitting wireless sub package.
When AUX = 1, it does not mean that all the UART data of the module have been transmitted already, perhaps the
last packet of data is still in transmission.

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5.6.3 Configuration procedure of module
Only happened when power-on resetting or exiting sleep mode
5.6.4 Notes for AUX
No.
Description
1
For function 1 & function 2 mentioned above, the priority should be given to the one with low level output, which means if it
meets each of any low level output condition, AUX outputs low level, if none of the low level condition is met, AUX outputs
high level.
2
When AUX outputs low level, it means the module is busy & cannot conduct operating mode checking. Within 1ms since
AUX outputs high level, the mode switch will be completed.
3
After switching to new operating mode, it will not work in the new mode immediately until AUX rising edge lasts for 2ms . If
AUX stays on the high level, the operating mode switch can be affected immediately.
4
When the user switches to other operating modes from mode 3 (sleep mode) or it’s still in reset process, the module will reset
user parameters, during which AUX outputs low level.