Ebyte E330-400T13S User manual

Chengdu Ebyte Electronic Technology Co., Ltd. E78-900M22S User manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
1
E330-400T13S User Manual
433/470MHz 20mW wireless module

Chengdu Ebyte Electronic Technology Co.,Ltd. E330-400T13S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
2
Content
DISCLAIMER............................................................................................................................................................................................. 3
1. OVERVIEW.............................................................................................................................................................................................4
1.1 PRODUCT INTRODUCTION..............................................................................................................................................4
1.2 FEATURES...................................................................................................................................................................... 4
1.3 APPLICATION..................................................................................................................................................................4
2. SPECIFICATIONS...................................................................................................................................................................................5
3. MECHANICAL PROPERTIES............................................................................................................................................................... 6
4. CONNECTION DIAGRAM....................................................................................................................................................................7
5. DETAILED FUNCTION......................................................................................................................................................................... 8
5.1 LDC RECEPTION............................................................................................................................................................ 8
5.2 SINGLE POINT WAKEUP.................................................................................................................................................. 8
5.3 MODULE RESET............................................................................................................................................................. 9
5.4 AUX.............................................................................................................................................................................. 9
5.5 MATTERS NEEDING ATTENTION......................................................................................................................................9
6. OPERATING MODE.............................................................................................................................................................................10
6.1 MODE SWITCH............................................................................................................................................................. 10
6.2 NORMAL MODE (MODE 0)............................................................................................................................................11
6.3 RECEIVING MODE (MODE 1)........................................................................................................................................ 11
6.4 CONFIGURATION MODE (MODE 2)................................................................................................................................11
6.5 DEEP SLEEP MODE (MODE 3)....................................................................................................................................... 11
7. REGISTER READ AND WRITE CONTROL......................................................................................................................................12
7.1 INSTRUCTION FORMAT................................................................................................................................................. 12
7.2 WORKING PARAMETER READING................................................................................................................................. 12
7.3 VERSION NUMBER READ..............................................................................................................................................12
7.4 RESET COMMAND........................................................................................................................................................ 13
7.5 PARAMETER SETTING INSTRUCTION............................................................................................................................ 13
7.6 FACTORY DEFAULT PARAMETERS................................................................................................................................. 14
8. HOST COMPUTER CONFIGURATION INSTRUCTIONS............................................................................................................... 15
9. HARDWARE DESIGN......................................................................................................................................................................... 15
10. COMMON PROBLEMS..................................................................................................................................................................... 16
10.1 TRANSMISSION DISTANCE IS NOT IDEAL.................................................................................................................... 16
10.2 MODULE IS EASILY DAMAGED................................................................................................................................... 16
10.3 BIT ERROR RATE IS TOO HIGH.................................................................................................................................... 17
11. WELDING OPERATION GUIDANCE.............................................................................................................................................. 17
12. ANTENNA GUIDE............................................................................................................................................................................. 17
12.1 ANTENNA RECOMMENDATION....................................................................................................................................17
REVISE HISTORY....................................................................................................................................................................................18
13. ABOUT US.......................................................................................................................................................................................... 18

Chengdu Ebyte Electronic Technology Co.,Ltd. E330-400T13S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
3
Disclaimer
EBYTE reserves all rights to this document and the information contained herein.
Products, names, logos and designs described herein may in whole or in part be
subject to intellectual property rights. Reproduction, use, modification or disclosure to
third parties of this document or any part thereof without the express permission of
EBYTE is strictly prohibited.
The information contained herein is provided “as is” and EBYTE assumes no
liability for the use of the information. No warranty, either express or implied, is given,
including but not limited, with respect to the accuracy, correctness, reliability and
fitness for a particular purpose of the information. This document may be revised by
EBYTE at any time. For most recent documents, visit www.ebyte.com.

Chengdu Ebyte Electronic Technology Co.,Ltd. E330-400T13S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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1. Overview
1.1 Product Introduction
E330-400T13S is a small size, low power consumption, low cost,
ultra-high cost-effective serial port module, integrated transceiver, covering
433MHz and 470MHz frequency bands. The module supports transparent
transmission and fixed-point transmission mode, supports LDC single-point
wake-up, software multi-level airspeed adjustable, and can be applied to a
variety of wireless transmission applications. At the same time, the module
is simple and easy to use, and you can get started quickly without
complicated configuration, so that it can be used immediately.
1.2 Features
Small size: 16*26mm;
Low power consumption: LDC ultra-low power consumption receiving mode;
Support transparent transmission and fixed-point transmission;
Single-point wake-up: The module can support low-power single-point wake-up to solve the problem of false
wake-up at the same frequency and reduce the overall power consumption of the system;
Support 2~25kbps multi-level transmission rate adjustable;
Multi-level adjustable output power;
Support up to 164 physical channels configurable, covering 433MHz and 470MHz frequency bands;
1.3 Application
Industrial intelligent gateway;
Industrial sensors;
Wireless alarm security system;
Wireless remote control;
Smart agriculture;
Sensor to cloud;
Intelligent light control system;

Chengdu Ebyte Electronic Technology Co., Ltd. E78-900M22S User manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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2. Specifications
2.1 Limit parameters
main parameters
Minimum
Typical value
Max
Remark
voltage （V）
3
3.3/5
5.5
Over 5.5V may burn the
module permanently
(Consider wide-voltage
power supply when
designing)
Working frequency （MHz）
410
433
493
Channel spacing 0.5MHz
Emission current (mA)
-
32mA
433MHz@13dBm
Receive current （mA）
6mA
Regular receipt
Sleep current （uA）
1.6
Maximum output power
（dBm）
12
13
13
Receiving sensitivity （dBm）
-
-119
-
-2Kbps
Air speed （bps）
2K
2K
25K
Multi-level adjustable
main parameters
describe
Remark
Reference distance
2.5km
Send length
58 Byte
Maximum transmission bytes in a single
time
Cache capacity
80Byte
Software actual debugging
Modulation
FSK
Communication Interface
UART
8N1\8E1\EO1,1200~38400Multi-level
adjustable
Encapsulation
SMD
Interface
1.27
Size
16*26
Actual layout
Antenna Interface
IPEX/Stamp hole
Equivalent impedance is about 50Ω
Name
Modul
Remark
RF crystal oscillator
(MHz)
--
16M（Built-in load
capacitance ）

Chengdu Ebyte Electronic Technology Co.,Ltd. E330-400T13S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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3. Mechanical properties
No.
Name
Direction
Function
1
GND
-
Module ground
2
GND
-
Module ground
3
GND
-
Module ground
4
GND
-
Module ground
5
M0
Input (very weak
pull-up)
Cooperate with M1 to determine the 4 working modes of the module.
(Can not be suspended, if not used, it can be grounded)
6
M1
Input (very weak
pull-up)
Cooperate with M0 to determine the 4 working modes of the module.
(Can not be suspended, if not used, it can be grounded)
7
RXD
Input
TTL serial port input, connected to the external TXD output pin;
8
TXD
Output
TTL serial port output, connected to the external RXD input pin;
9
AUX
Output
Used to indicate the working status of the module; the user wakes up the
external MCU, and outputs low level during power-on self-check
initialization; (can be left floating)
10
VCC
-
Module power supply positive reference, voltage range: 3~3.6V DC
11
GND
-
Module ground
12
NC
Reserved
（OCDSCK）
13
GND
-
Module ground (GND)

Chengdu Ebyte Electronic Technology Co.,Ltd. E330-400T13S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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14
NC
Reserved
(OCDSDA)
15
NC
Reserved
(VDD）
16
NC
Reserved
PA4
17
NC
Reserved
PA2
18
NC
Reserved
GPIO3
19
GND
-
Module ground
20
GND
-
Module ground
21
ANT
-
antenna
22
GND
-
Module ground
4. Connection diagram
No.
Brief description of the connection between the module and the single-chip microcomputer
(the above figure takes the STM8L single-chip microcomputer as an example)
1
The wireless serial port module is TTL level, please connect with TTL level MCU.
2
For some 5V microcontrollers, it may be necessary to add 4-10K pull-up resistors to the TXD and AUX pins of the
module.

Chengdu Ebyte Electronic Technology Co., Ltd. E78-900M22S User manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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5. Detailed function
5.1 LDC reception
E330-400T13S module receives in LDC mode. The module is in the LDC (Low Duty Cycle) ultra-low power receiving mode
when powered on. The specific working mechanism is that the module periodically wakes up from sleep to detect the wireless
wake-up code. If there is a valid wake-up code, turn on RX Windows, otherwise, it will restart again after timeout. Go to sleep.
As shown below:
LDC cycle is software configurable
Sending mode. When the module sends data, it can automatically load the wake-up code corresponding to the LDC cycle.
Both sender and receiver need to configure the same LDC cycle.
5.2 Single point wakeup
The module has a single-point wake-up function, which can effectively suppress the problem of false wake-ups between devices
with the same frequency and different addresses; in the internal design, the module address will be configured as the SYNC address of
the hardware radio frequency chip, which is used to synchronize the receiving process and send The receiver chip will automatically
filter this data packet if it does not match the receiving synchronization word; the sender uses the short preamble + synchronization
word when sending the wake-up code;

Chengdu Ebyte Electronic Technology Co.,Ltd. E330-400T13S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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Single point wake-up mode:
5.3 Module reset
After the module is powered on, AUX will immediately output low level, perform hardware self-check, and set the working mode
according to user parameters;During this process, AUX maintains low level, and after completion, AUX outputs high level, and starts
to work normally according to the working mode formed by the combination of M1 and M0;
Therefore, the user needs to wait for the rising edge of AUX as the starting point for the normal operation of the module.
5.4 AUX
AUX is used for wireless transmission and reception buffering instructions and self-checking instructions.
It indicates whether the module has data that has not been sent out through wireless transmission, or whether it has received
wireless data that has not been sent out through the serial port, or whether the module is in the process of initializing self-checking.
5.5 Matters needing attention
No.
AUX considerations
1
The above function 1 and function 2, output low level priority, that is: if any one of the output low level conditions is met,
AUX will output low level;
When all low-level conditions are not met, AUX outputs a high level.
2
When AUX outputs low level, it means that the module is busy, and the working mode detection will not be performed at
this time;
When the module AUX outputs high level within 1ms, the mode switching will be completed.
3
After the user switches to the new working mode, at least 2ms after the rising edge of AUX, the module will actually enter
this mode;
If AUX is always at high level, the mode switch will take effect immediately.
4
When the user enters other modes from mode 3 (sleep mode) or is in the reset process, the module will reset the user
parameters, during which AUX outputs low level.

Chengdu Ebyte Electronic Technology Co., Ltd. E78-900M22S User manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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6. Operating mode
The module has four working modes, which are set by pins M1 and M0; the details are shown in the following table:
Mode（0-3）
M1
M0
Mode introduction
Remark
Send mode
（0）
0
0
The serial port is turned on, the wireless is turned on, and the
wake-up code is automatically added before sending the data
packet;
Use with mode 1
Receive mode
（1）
0
1
The serial port reception is closed, and the wireless is periodically
awakened to listen to air data. After receiving the data, open the
serial port to output data;
Use with mode 0
Configuration
mode （2）
1
0
Deep sleep mode, configuration commands can be sent through the
serial port, the serial port fixed parameters 9600, 8N, 1
Sleep mode
（3）
1
1
Module deep sleep mode, both serial port and wireless are closed
6.1 Mode switch
No
Remark
1
Users can combine high and low levels of M1 and M0 to determine the working mode of the module. Two GPIOs of
MCU can be used to control mode switching
After changing M1 and M0: If the module is idle, it can start to work according to the new mode after 1ms;
If the module has serial port data that has not been transmitted wirelessly, the new working mode can be entered after
the transmission is completed;
If the module receives wireless data and sends out data through the serial port, it must be sent to the new working mode;
Therefore, the mode switching can only be effective when AUX outputs 1, otherwise the switching will be delayed.
2
For example: the user continuously inputs a large amount of data and performs mode switching at the same time, the
switching mode operation at this time is invalid; the module will process all user data before proceeding to the new
mode detection
So the general suggestion is: check the output status of the AUX pin, wait for 2ms after outputting the high level, and
then switch.
3
When the module is switched from other modes to sleep mode, if there is data that has not yet been processed;
After the module processes these data (including receiving and sending), it can enter the sleep mode. This feature can be
used for fast sleep, thereby saving power consumption; for example: the transmitter module works in mode 0, the user
initiates serial data "12345", and then does not need to wait for the AUX pin to be idle (high level), and can directly
switch to sleep mode. And the user's main MCU will go to sleep immediately, and the module will automatically send
all user data wirelessly, and it will automatically go to sleep within 1ms.
Thereby saving MCU working time and reducing power consumption.
4
Similarly, this feature can be used in any mode switching. After the module processes the current mode event, it will
automatically enter a new mode within 1ms; thus eliminating the need for users to query AUX and achieving the
purpose of fast switching ；
For example, switching from the transmitting mode to the receiving mode; the user MCU can also go to sleep before the
mode switching, and use the external interrupt function to obtain the AUX changes, thereby performing the mode
switching.