Ebyte E32-433T30D User manual

(XE
EBYTE
E32-433T30D User Manual
SX1278 433MHz 1W DIP Wireless Module
Chengdu Ebyte Electronic Technology Co.,Ltd.

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
CONTENT
1. OVERVIEW ....uuiiineinssnsrisissisnssissssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssossossssssssses 3
1.1 INTRODUCTION
T.2 FEATURES ....oooieite totes eee et ete e settee eee sete eee 4 ete e ate ete e4 2a estes beste eb seat e tee e see ee sets eens sees eee eate eats ease eee ebs este ene e eae e areas
2.1 LIMIT PARAMETER .......tuttutttttuet att eet att ete eee eee eae eae e see se eae e eee see ae este ae eee eee eee ae aee nee see eee eee e esse esses eee ees ees ee sete ere ens aren see see ase aeens 5
2.2 OPERATING PARAMETER .......cuttuttttttttttatteaet ate aee ase aet eee aseaaee atest ease ata ae ease see ee eae aee see see see see eae aeeseseaneses esses eee ers essere ensnssnsnne 5
3 SIZE AND PIN DEFINITION ......coeiiiinnnsisisisscssissssssssssssssssassssssssassassssssssassesssssssssssssssssssssses 6
4 CONNECT TO MOU ..ucueniricrnseirnisessississnssssssssssassassesssssassessessssssssssssssssssssssssssssssssssasssssssssssassssssss 7
5S FUNCTION DESCRIPTION ....cuuiicrinrinrisnississississesssssssssssssssssssassassesssssssssssssssssssssssssssssssssssssasses 8
5.1 FIXED TRANSMISSION ......uititititeeeeeteaeeeeeeseeesetee ses see see aee see see see see see see see aae senses see see sees eases esse eases sess essere assesses serseseeseessens 8
5.2 BROADCASTING TRANSMISSION ......iiteieite teste steate sae see see seeaeesesesessessens ese ase assess assess assesses ee eee see ese eee eee ese assess ane ane ane aneanean 8
5.6.1 Indication of UART output .............ccccooenveveecnne.
5.6.2 Indication of wireless transmitting
5.6.3 Configuration procedure Of MOGHIE ...................c...ocoooiiiiiiiiiiii iii ees 10
5.6.4 NOTES FOr AUX... eee t eet ets ete 2 eee anette teense nesters eens ene eee 10
6 OPERATING MODE ......uuniitnricisnissnssissisasssissississsssisssssssassssssssassesssssssssssssssssssssssssassasses 11
[CT IY 0] 5) AS 1 0) TSS
6.2 NORMAL MODE (MODE 0)
6.3 WAKE-UP MODE (MODE 1) .....e itt itt itt it iit eee eee ses esses sess es ses es este 2 eset eee ee ease eee eeeeee eee ne ene ene ene ane anes 12
6.4 POWER-SAVING MODE (MODE 2) ......cuttuttattatt att att ate ate ate aeeaaea atest a aea see aea seas ae ee aae een ee ee eeneensensensensensensensensen tease assess eseaseanes 12
6.5 SLEEP MODE (MODE 3)... ttitittte ett ete ete ete attest ete etee see see see aee see see see aee sae see sae aae see see sense sees arses esse ss esse ens es sess ess enennsaneeseens 13
T COMMAND FORMAT .....uuiiitinitnsieeissnssssssssssssssssississssssssisssssssssssssasssssssssssasssssssssssssssssssass 13
7.1 DEFAULT PARAMETERS .......cutititiutt ett eteete attest ete eteatee see see see see see see see see sae see sae aae see see see seesens ers enses es ss eres asses sessessensensnsessenns
7.2 READING OPERATING PARAMETERS
7.3 READING VERSION NUMBER ........ccuiitiiitieite ite ctttette see ete sete etee eats eee ete east e este see ete este e bee ee esses ets e ese sass ase esbeensee aes see ersesa an
TA RESET COMMAND ......ooiiiitiiitie ite ite settee tee eesti esses eee sete ett e estes tease ete eat eats esse obsess ees be sme e esses te enbesnte sess absentee ates sss esseereean
7.5 PARAMETER SETTING COMMAND ........ooitiiitieiteitecttietie tee et sete eetae sate see ete ease esae sete ebe eats seats sass eee esse amas se sees sets esae sane are esee en 14
8. HARDWARE DESIGN .....cccoiiinecccersrancscnccsansssascssscsssssssasssssssasssssssssssssasssssssssssssasssssssassssassssssssasess 16
OD FAQ aeieceieceeccenenancssscssassssassessessssssasssessssasssssssssssssasssssessssssnssssssssassssassrasssaasssssessssssassssssssasssasssrasssans 17
9.1 COMMUNICATION RANGE IS TOO SHORT ........cvviitieiueeitectteiete sete e eee eteetae ete e sees ete eate estes eee etesasae esas sree sre esse esas sane are sere ensea anes 17
9.2 MODULE IS EASY TO DAMAGE .......ooiiiitiiitiiie siete ete ee eet eet esate see ete cates testes eee et se esae sate ete esteeebeebe sees ers eesae anes sane ere eans 18
9.3 BER(BIT ERROR RATE) IS HIGH .......ecutitiitieite ite ite ete e ete et eee ete sees te siesta sae te stan ee tesa ses essentense eee eae eee ese eae ere are ereesee see nee en 18
10 PRODUCTION GUIDANCE .....cuueecrerrecccercssancssscsessesascssnssssssssassssssssasssssssessssassssssssasssaasssassssases 18
11 E32 SERIES .....ooooieireecnnccsaecsncssascsssssssssssassssssssssssassssssssasssssssssssssasssssssassssnssssssssasssasssssssssssssssssasss 18
12 ANTENNA RECOMMENDATION .....cccoceiericrracccnssascsssessassssassossessssssassssssssassssassssssssassessessasses 19
13 PACKAGE FOR BATCH ORDER ........occiiruicnrecccnrcsacsssscssnsssascsssessassssassssssssassssssssssssasssessssases 20
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.

Bhe Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.

Bhe Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
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 1s” 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.
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 3

Bhe Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
1. Overview
1.1 Introduction
E32-433T30D is a wireless serial port module
(UART) based on SEMTECH's SX1278 RF chip. It has
multiple transmission modes, working in the
= 43373 (an)
410MHz~441MHz, (default 433MHz), LoRa spread ¢ E32 #0 EBYTE
u.
EE
~
spectrum
technology,
o
Ei
v
C £
x
SX1278 features LoRa™, which will bring longer —
NE . Oo SN: 18011800001 Made in China
communication distance, and has the advantages of ~r Manufacturer: EBYTE
ol FCC ID: 2ALPH-E32 °
concentrated power density, meanwhile it has a very —¥
strong confidentiality. E32-433T30D 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 in air features randomness.
air Data Rate (Default 2.4kps). The encryption-decryption algorithm makes data interception meaningless. The data
compression enables shorter transmitting time and lower rate of being interfered, which increased the reliability and
transmitting efficiency.
1.2 Features
Communication distance tested is up to 8km
Maximum transmission power of 1W, software multi-level adjustable;
Support the global license-free ISM 433MHz band;
Support air date rate of 0.3kbps~19.2kbps;
Support new generation LoRa technology.
Low power consumption for battery supplied applications;
Support 3.3V~5.2V 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;
SMA access point, 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.
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.

Bhe Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
2. Specification and parameter
2.1 Limit parameter
Main parameter Performance Notes
Min. Max.
Power supply (V) Voltage over 5.2V will cause permanent
0 5.2
damage to module
Blocking power (dBm> Chances of burn 1s slim when modules
are used in short distance
Operating temperature (°C) -40 +85 -
2.2 Operating parameter
Main parameter Performance
Remark
Min Typ. Max.
Operating voltage (V) 33 5.0 52 >5.0 V ensures output power
Communication level (V) ) 33 ) For 5V TTL, it may be at risk of
burning down
Operating temperature (°C) -40 - 85 Industrial design
Operating frequency (MHz) 410 - 441 Support ISM band
Power oo Instant power }
Transmitting current [mA] - 610 . Instant power consumption
consumpt consumption
ion Receiving current [mA] - 20 - -
Turn-off current [uA] - 5 - Software 1s shut down
Max Tx power (dBm> 29.5 30 30.5 -
Receiving sensitivity (dBm) -145 -147 -148 Air data rate is 2.4kbps
Air data rate (bps) 0.3k 24k 19.2k Controlled via user's programming
Main parameter Description remark
Test condition: clear and open area, antenna gain: 5dB1,
Distance for reference 8000m 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 24 * 43mm -
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.

Bhe Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
Antenna SMA-K 50 ohm impedance
3 Size and pin definition
24.0+0.1
)
12.8101
4.38
2.54
—
FEEEEERE
=F
"Ll
pe
4.20X£0.1
—|
aad
3.00
7
7
7
420
2.54
_
_
_
125)
F
i
1.0
7
7
7
J
E—
|
E—
—
6.20
19.0
Toppad:
1.50
Bottom
pad
:
1.50
pm
Ll
09010)
[200
0o0T
(0)
[200
1.50 1.50
1
|
070]
[2
00
oT
|
2.00
Pad
quantity:
11
Unit:
mm
No.
Name
Direction
Function
)
MO
Input
Work
with
M1
to
decide
4
working
modes
of
module
(not
(weak
pull-up)
suspended,
if
not
used,
could
be
grounded).
5
MI
Input
Work
with
MO
to
decide
4
working
modes
of
module
(not
(weak
pull-up)
suspended,
if
not
used,
could
be
grounded).
TTL
UART
inputs,
connects
to
external
(MCU,
PC)
TXD
output
pin.
Can
3
RXD
Input
) )
be
configured
as
open-drain
or
pull-up
input.
TTL
UART
outputs,
connects
to
external
RXD
(MCU,
PC)
input
4
TXD
Output
. .
pin.
Can
be
configured
as
open-drain
or
push-pull
output
To
indicate
module
*
s
working
status
&
wakes
up
the
external
5
AUX
Output
MCU.
During
the
procedure
of
self-check
initialization,
the
pin
outputs
low
level.
Can
be
configured
as
push-pull
output
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.

eave Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
(suspending is allowed).
6 vce Input Power supply : 3.3~5.2V DC
7 GND Input Ground
8 fixed orifice - fixed orifice
9 fixed orifice - fixed orifice
10 fixed orifice - fixed orifice
11 fixed orifice - fixed orifice
4 Connect to MCU
Ul MCU
19 18
—9 PC1 PCO O—-—
3 O Pcs PB7 ETE 5 1
—,9 PAO PB6 © 15 5 g Mo :
— = 9 PA1 pPB5 © Sh 5 QO Wm El
9 PA2 USART RX O 1 D4 3 OQ RXD £
—9 PA3 USART TX O ow) . OQ TXD KE
— a9 VSS PB4 O 13 8 g AUX | «<
HY VDD PB3 — 8
0 9 PDO PB2 Oo —
—CO PBO PBT O———
VCC GND
No. Description (STMSL MCU)
1 The UART module 1s TTL level.
2 For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.

SLO
Chengdu
Ebyte
Electronic
Technology
Co,Ltd
E32-433T30D
user
manual
5 Function description
5.1 Fixed transmission
Address Channel
00
03
04
AA
BB
Ci
Target
address
Target
channel
~~
Data
»
No
output
Address Channel 4
Address Channel
©
0
» No output
Address Channel
5.2 Broadcasting transmission
FF FF04 AA BB CC
Address Channel Data
aoa r —~
AA BB Ul
Address Channel
» No output
Address Channel
5.3 Broadcasting address
® For example: Set the address of module A as OxFFFF, and the channel as 0x04;
® When module is the transmitter (transparent transmission), all modules under channel 0x04 will receive the data, the
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.

Bhe Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
purpose of broadcast is realized.
5.4 Monitor address
® For example: Set the address of module A as OxFFFF, 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
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 MO.
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
All the wireless data received have been
To wake up the external sent by TXD.(The buffer is actually empty.)
MCU 2-3ms in advance
Timing Sequence Diagram of AUX when TXD pin transmits
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.
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.

Bhe Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
® 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.
0- RXD
1- TXD
2- AUX
563
Subpackage transmitting : the last package of data have been
written to the RFIC. When transmission is on, user can continue
to input 512 new bytes. (The buffer is actually empty.)
AR ann
+1 I
Timing Sequence Diagram of AUX when RXD pin receives
Configuration procedure of module
® Only happened when power-on resetting or exiting sleep mode
The self-check procedure
happens when the procedure
of power-on reset, instruction
reset and exit mode 3.
Mormal operation after self-check
Timing Sequence Diagram of AUX when self-check
5.6.4 Notes for AUX
No. Description
For function 1 & function 2 mentioned above, the priority should be given to the one with low level output, which means if
1 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.
When AUX outputs low level, it means the module is busy & cannot conduct operating mode checking. Within 1ms since
2 AUX outputs high level, the mode switch will be completed.
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.
When the user switches to other operating modes from mode 3 (sleep mode) or it’s still in reset process, the module will
4 reset user parameters, during which AUX outputs low level.
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
10

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
6 Operating mode
There are four operating modes, which are set by M1 and MO, the details are as follows:
Mode (0-3) MO | M1 Mode introduction Remark
0 Normal 0 0 UART and wireless channel are open, transparent | The receiver must work in
transmission 1s on mode 0 or mode 1
1 Wake up 1 0 UART and wireless channel are open, the only difference | The receiver could be 0,1 or 2
with mode O is that before transmitting data, increasing the
wake up code automatically, so that it can awake the receiver
under mode 3.
2 Power saving 0 1 UART close, wireless is under air-awaken mode, after | transmitter must be mode 1,
receiving data, UART open and send data. unable to transmit in this mode.
3 Sleep 1 1 sleep mode, receiving parameter setting command is | more details on parameter
available. specification.
6.1 Mode switch
The user can decide the operating mode by the combination of M1 and MO. The two GPIO of MCU can be used to
switch mode. After modifying M1 or MO, it will start to work in new mode 1ms later if the module is free. If there
are any serial data that are yet to finish wireless transmitting, it will start to work in new mode after the UART
transmitting finished. After the module receives the wireless data & transmits the data through serial port, it will
start to work in new mode after the transmitting finished. Therefore, the mode-switch is only valid when AUX
outputs 1, otherwise it will delay.
For example, in mode 0 or mode 1, if the user inputs massive data consecutively and switches operating mode at the
same time, the mode-switch operation is invalid. New mode checking can only be started after all the user’s data
process completed. It is recommended to check AUX pin out status and wait 2ms after AUX outputs high level
before switching the mode.
If the module switches from other modes to stand-by mode, it will work in stand-by mode only after all the
remained data process completed. The feature can be used to save power consumption. For example, when the
transmitter works in mode 0, after the external MCU transmits data “12345”, it can switch to sleep mode
immediately without waiting the rising edge of the AUX pin, also the user’s main MCU will go dormancy
immediately. Then the module will transmit all the data through wireless transmission & go dormancy Ims later
automatically, which reduces MCU working time & save power.
Likewise, this feature can be used in any mode-switch. The module will start to work in new mode within 1ms after
completing present mode task, which enables the user to omit the procedure of AUX inquiry and switch mode
swiftly. For example, when switching from transmitting mode to receiving mode, the user MCU can go dormancy
before mode-switch, using external interrupt function to get AUX change so that the mode-switch can be realized.
This operation is very flexible and efficient. It is totally designed on the basis of the user MCU’s convenience, at the
same time the work load and power consumption of the whole system have been reduced and the efficiency of
whole system is largely improved.
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
11

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
6.2 Normal mode (mode 0)
‘When M1 = 0 & M0 = 0, module works in mode 0
Transmitting
The module can receive the user data via senal port, and transmit wireless data package of 58 bytes. When the data
inputted by user is up to 58 byte, the module will start wireless transmission. Durning which the user can input data
continuously for transmission.
When the required transmission bytes are less than 58 bytes, the module will wait 3-byte time and treat it as data
termination unless continuous data inputted by user. Then the module will transmit all the data through wireless
channel.
When the module receives the first data packet from user, the AUX outputs low level.
After all the data are transmitted into RF chip and transmission start , AUX outputs high level.
At this time, it means that the last wireless data package transmission is started, which enables the user to input
another 512 bytes continuously. The data package transmitted from the module working in mode O can only be
received by the module working in mode 0 or 1.
Receiving
The wireless receiving function of the module is on, the data packet transmitted from the module working in mode 0
& mode 1 can be received.
After the data packet is received, the AUX outputs low level, Sms later the module starts to transmit wireless data
through serial port TXD pin.
After all the wireless data have been transmitted via serial port, the AUX outputs high level.
6.3 Wake-up mode (mode 1)
‘When M1 = 0 & M0 = 1, module works in mode 1
The condition of data packet transmission & AUX function is the same as mode 0. The only difference is that the
module will add preamble code before each data packet automatically. The preamble code length depends on the
Transmitting wake-up time set in the user parameters. The purpose of the preamble code 1s waking up the receiving module
works in mode 2. Therefore, the data package transmitted from mode 1 can be received by mode 0, model and
mode 2.
Receiving The same as that in mode 0.
6.4 Power-saving mode (mode 2)
‘When M1 =1 & M0 = 0, module works in mode 2
Transmitting
UART is closed, the module cannot receive any serial port data from outside MCU.
Hence the function of wireless transmission is not available for the module working in this mode.
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
12

Bhe Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
Receiving
In mode 2, it is required the data transmitter works in mode 1.
The wireless module monitors the preamble code at regular time.
Once it gets the preamble code, it will remain as receiving status and waiting for the completion of receiving the
entire valid data package.
Then the AUX outputs low level, Sms later the serial port is open to transmit received wireless data through TXD.
Finally, AUX outputs high level after process completed.
The wireless module stays in “power-saving — monitoring” working status (polling).
By setting different wake-up time, the module will have different receiving response delay (2s in maximum) and
average power consumption (30uA in minimum).
The user needs to achieve a balance between communication delay time & average power consumption.
6.5 Sleep mode (mode 3)
‘When M1=1, M0=1, module works in mode 3
Transmitting N/A
Receiving N/A
Parameter This mode can be used for parameter setting. It uses serial port 9600 & 8N1 to set module working parameters
setting through specific instruction format. (pls refer to parameters setting for details)
‘When the mode changes from stand-by mode to others, the module will reset its parameters, during which the AUX
Notes keeps low level and then outputs high level after reset completed. It 1s recommended to check the AUX rising edge
for user.
7 Command format
In sleep mode (Mode 3: M1=1, M0=1) , it supports below instructions on list.
(Only support 9600 and 8N1 format when setting)
Instruction 2
No. Illustration
format
CO + 5 bytes working parameters are sent in hexadecimal format. 6 bytes in total and must be
1 CO+working sent in succession, ( Save the parameters when power-down ).
parameters
Save the parameters when power-down
2 Cl+Cl+Cl ( P P )
3 C2+working pee Cl are sent in hexadecimal format. The module returns the saved parameters and must
parameters e sent in succession.
C2 + 5 bytes working parameters are sent in hexadecimal format. 6 bytes in total and must be
4 C3+C3+C3 sent in succession. ( Do not save the parameters when power-down )
Three C3 are sent in hexadecimal format. The module returns the version information and they
5 C4+C4+C4 must be sent in succession.
7.1 Default parameters
Default parameter values: : C0 00 00 1A 17 40
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
13

Bhe Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
Model Frequency Address Channel Airdatarate | Baud rate Parity Transmitting power
E32-433T30D 433MHz 0x0000 0x17 2.4kbps 9600 8N1 IW
7.2 Reading operating parameters
Instruction format Description
C1+C1+Cl1
In sleep mode (MO=1, MI=1) ,
User gives the module instruction (HEX format): C1 C1 C1,
Module returns the present configuration parameters.
For example, CO 00 00 1A 17 44.
7.3 Reading version number
Instruction format Description
C3+C3+C3
In sleep mode (MO=1, M1=1), issue a command (HEX format) to the module senal port: C3 C3
C3,
The module returns the current configuration parameters, such as: C3 32 XX YY;
C3 1s the command prefix, 32 represents the product model, XX represents the version number, and
YY represents the interface format + the maximum power value of the module (hexadecimal). The
TTL interface is 0x10, RS232 is 0x40, and RS485 is 0x80
7.4 Reset command
Instruction format Description
C4+C4+C4
In sleep mode (MO=1, M1=1), issue a command (HEX format) to the module serial port: C3 C3
C3,
The module returns the current configuration parameters, such as: C3 32 XX YY,
C3 is the command prefix, 32 represents the product model, XX represents the version number, and
YY represents the interface format + the maximum power value of the module (hexadecimal). The
TTL interface is 0x10, RS232 is 0x40, and RS485 is 0x80
7.5 Parameter setting command
No. Item Description Remark
Fix 0xCO or 0xC2, it means this frame data is control ® Must be 0xCO or 0xC2
CO: Save the parameters when power-down
command
0 HEAD C2: Do not save the parameters when power-down
High address byte of module O0OH-FFH
1 ADDH (the default 00H)
Low address byte of module O0OH-FFH
2 ADDL
(the default 00H)
7 6 UART parity bit ® UART mode can be different
3 SPED
0 0 8N1 (default) between communication parties
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
14

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
0 1 801
1 0 8E1
1 1 8N1 (equal to 00)
5 4 3 TTL UART baud rate (bps)
0 0 0 1200
® UART baud rate can be different
0 0 1 2400
between communication parties
0 1 0 4800
® The UART baud rate has nothing to
0 1 1 9600 (default) } } oo
do with wireless transmission
1 0 0 19200
parameters & won't affect the
1 0 1 38400 . . .
wireless transmit / receive features.
1 1 0 57600
1 1 1 115200
2 1 0 Air data rate (bps)
0 0 0 03k ® The lower the air data rate, the
0 0 1 12k longer the transmitting distance,
0 1 0 2 4k (default) better anti-interference performance
0 1 1 4.8k and longer transmitting time
1 0 0 9.6k ® The air data rate must keep the same
1 0 1 19.2k for both communication parties.
1 1 0 19.2k (same to 101)
1 1 1 19.2k (same to 101)
General Specifications Except for E32 (400T208)
7] 6 5 reserved Write 0
Communication channel
4 CHAN 4-0, channel (410M + CHAN*1M), default 17H
00H-1FH, correspond to 410~441 MHz
(433MHz)
7 Fixed transmission enabling bit (similar to MODBUS) ® In fixed transmission mode, the first
0 Transparent transmission mode three bytes of each user's data frame
can be used as high/low address and
channel. The module changes its
address and channel when transmit.
1 Fixed transmission mode oo oo
And it will revert to original setting
after complete the process.
5 OPTION - - —
6 10 drive mode (default 1) ® This bit is used to the module
1| TXD and AUX push-pull outputs, RXD pull-up inputs internal pull-up resistor. It also
increases the level's adaptability in
TXD, AUX open-collector outputs, RX) open-collector case of open drain. But in some
inputs cases, 1t may need external pull-up
resistor.
5 4 3 wireless wake-up time ® The transmit & receive module work
0 0 0 250ms (default) in mode 0, whose delay time is
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
15

Bhe Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
0 0 1 500ms invalid & can be arbitrary value.
0 1 0 750ms ® The transmitter works in mode 1 can
0 1 1 1000ms transmit the preamble code of the
1 0 0 1250ms corresponding time continuously.
1 0 1 1500ms ® When the receiver works in mode 2,
1 1 0 1750ms the time means the monitor interval
time (wireless wake-up). Only the
1 1 1 2000ms data from transmitter that works in
mode 1 can be received.
2 FEC switch ® After tum off FEC, the actual data
0 Turn off FEC transmission rate increases while
anti-interference ability decreases.
Also the transmission distance is
relatively short.
1 Turn on FEC (default) oo
® Both communication parties must
keep on the same pages about
turn-on or turn-off FEC.
1 0 Transmission power (approximation) The external power must make sure the
0 0 30dBm (default) ability of current output more than 250mA
0 1 27dBm and ensure the power supply ripple within
1 0 24dBm 100mV.
Low power transmission is not
1 1 21dBm recommended due to its low power supply
efficiency.
For example: The meaning of No.3 "SPED" byte:
The binary bit of the 7 6 5 4 3 5 1 0
byte
Configures by user 0 0 0 1 1 0 1 0
Meaning UART panty bit 8N1 UART baud rate 1s 9600 Air data rate is 2 4k
Corresponding 1 A
hexadecimal
8. Hardware design
® [tis recommended to use a DC stabilized power supply. The power supply ripple factor is as small as possible, and
the module needs to be reliably grounded. ;
® Please pay attention to the correct connection of the positive and negative poles of the power supply. Reverse
connection may cause permanent damage to the module;
® Please check the power supply to ensure it is within the recommended voltage otherwise when it exceeds the
maximum value the module will be permanently damaged;
® Please check the stability of the power supply, the voltage can not be fluctuated frequently;
® When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 16

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
margin, so the whole machine is beneficial for long-term stable operation. ;
The module should be as far away as possible from the power supply, transformers, high-frequency wiring and other
parts with large electromagnetic interference. ;
High-frequency digital routing, high-frequency analog routing, and power routing must be avoided under the
module. If it is necessary to pass through the module, assume that the module is soldered to the Top Layer, and the
copper is spread on the Top Layer of the module contact part(well grounded), it must be close to the digital part of
the module and routed in the Bottom Layer;
Assuming the module is soldered or placed over the Top Layer, it is wrong to randomly route over the Bottom Layer
or other layers, which will affect the module's spurs and receiving sensitivity to varying degrees;
It is assumed that there are devices with large electromagnetic interference around the module that will greatly
affect the performance. It is recommended to keep them away from the module according to the strength of the
interference. If necessary, appropriate isolation and shielding can be done;
Assume that there are traces with large electromagnetic interference (high-frequency digital, high-frequency analog,
power traces) around the module that will greatly affect the performance of the module. It is recommended to stay
away from the module according to the strength of the interference. If necessary, appropriate isolation and shielding
can be done.
If the communication line uses a 5V level, a 1k-5.1k resistor must be connected in series (not recommended, there is
still a risk of damage);
Try to stay away from some physical layers such as TTL protocol at 2.4GHz , for example: USB3.0;
The mounting structure of antenna has a great influence on the performance of the module. It is necessary to ensure
that the antenna is exposed, preferably vertically upward. When the module is mounted inside the case, use a good
antenna extension cable to extend the antenna to the outside;
The antenna must not be installed inside the metal case, which will cause the transmission distance to be greatly
weakened.
9 FAQ
9.1 Communication range is too short
The communication distance will be affected when obstacle exists.
Data lose rate will be affected by temperature, humidity and co-channel interference.
The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing near ground.
Sea water has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea.
The signal will be affected when the antenna is near metal object or put in a metal case.
Power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the shorter the
distance).
The power supply low voltage under room temperature is lower than 2.5V, the lower the voltage, the lower the
transmitting power.
Due to antenna quality or poor matching between antenna and module.
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
17

Bhe Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
9.2 Module is easy to damage
® Please check the power supply source, ensure it is 3.3V~5.2V, voltage higher than 5.2V will damage the module.
Please check the stability of power source, the voltage cannot fluctuate too much.
® Please make sure antistatic measure are taken when installing and using, high frequency devices have electrostatic
susceptibility.
® Please ensure the humidity is within limited range, some parts are sensitive to humidity.
® Please avoid using modules under too high or too low temperature.
9.3 BER(Bit Error Rate) 1s high
® There are co-channel signal interference nearby, please be away from interference sources or modify frequency and
channel to avoid interference;
® Poor power supply may cause messy code. Make sure that the power supply is reliable.
® The extension line and feeder quality are poor or too long, so the bit error rate is high;
10 Production guidance
This type is DIP module, when the welder welds the module, he must be welding according to the anti-static
regulation. This product is allergic to static, randomly welding the module will have the chance of damaging it
permanently.
11 E32 series
Model No. | Core IC Frequency Tx power | Distance Data Rate | Package Size Interface
Hz dBm km mm
E32-868T208 S$X1276 868M 20 3 0.3k~19.2k SMD 16 * 26 UART
E32-915T208 S$X1276 915M 20 3 0.3k~19.2k SMD 16 * 26 UART
E32-400T208 S$X1278 433M 470M 20 3 0.3k~19.2k SMD 16 * 26 UART
E32-915T308 S$X1276 915M 30 8 0.3k~19.2k SMD 25%403 UART
E32-868T30S S$X1276 868M 30 8 0.3k~19.2k SMD 25%403 UART
E32-433T30S S$X1278 433M 30 8 0.3k~19.2k SMD 25%403 UART
E32-433T20S2T S$X1278 433M 20 3 0.3k~19.2k SMD 17 * 30 UART
E32-868T30D S$X1276 868M 30 8 0.3~19.2k DIP 24 * 43 SMA-K
E32-915T30D S$X1276 915M 30 8 0.3~19.2k DIP 24 * 43 SMA-K
E32-170T30D S$X1278 170M 30 8 0.3k~9.6k DIP 24 * 43 SMA-K
E32-868T20D S$X1276 868M 20 3 0.3~19.2k DIP 21 *36 SMA-K
E32-915T20D S$X1276 915M 20 3 0.3~19.2k DIP 21 *36 SMA-K
E32- 433T20DC S$X1278 433M 20 3 0.3k~19.2k DIP 21 *36 SMA-K
E32- 433T30D S$X1278 433M 30 8 0.3k~19.2k DIP 24 * 43 SMA-K
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 18

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-433T30D user manual
E32-433T27D SX1278 433M 27 0.3k~19.2k DIP 24 *43 SMA-K
E£32-433T2081 SX1278 433M 20 0.3k~19.2k SND 17*255 SMA-K
12 Antenna recommendation
The antenna is an important role in the communication process. A good antenna can largely improve the
communication system. Therefore, we recommend some antennas for wireless modules with excellent performance and
reasonable price.
Frequency Gain X X
Model No. Type Interface . Height Cable Function feature
Hz dBi
Soft PCB Soft inside, FPC soft
TX433-NP-4310 433M SMA-J 2 43.8%9. 5mm -
antenna antenna
Rubber Flexible &omnidirectional
TX433-JW-5 433M SMA-J 2 50mm -
antenna
Rubber Flexible &omnidirectional
TX433-TWG-7 433M SMA-J 25 75mm -
antenna
Rubber Flexible &omnidirectional
TX433-JK-20 433M SMA-J 3 210mm -
antenna
Rubber Flexible &omnidirectional
TX433-JK-11 433M SMA-J 25 110mm -
antenna
Sucker Sucker antenna, High gain
TX433-XP-200 433M SMA-J 4 19cm 200cm
antenna
Sucker Sucker antenna, High gain
TX433-XP-100 433M SMA-J 35 18.5¢m 100cm
antenna
Sucker Car Sucker antenna, High
TX433-XPH-300 433M SMA-J 6 96.5cm 300cm
antenna gain
Rubber Short straight
TX433-17.G-6 433M SMA-J 25 52mm -
antenna &omnidirectional
Rubber Short straight
TX433-17-5 433M SMA-J 2 52mm -
antenna &omnidirectional
Sucker
TX490-XPL-100 490M SMA-J 35 12cm 100cm Sucker antenna, High gain
antenna
Rubber Short straight
TX490-J7-5 490M SMA-J 2 50mm -
antenna &omnidirectional
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
19