Ebyte E32-170T30D User manual

(cn) ©
EBYTE
E32-170T30D User Manual
SX1278 170MHz 1W DIP Wireless Module
Chengdu Ebyte Electronic Technology Co.,Ltd.

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
CONTENT
OVERVIEW ...ucuouiinnsriinsssssnssssmssssssissssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss 3
1.1 INTRODUCTION. ... ce ctteeteee atest stesso eee eee sees ee seers oes ee sees ees ee eae aes e sees sesso sess e ames se eee eRe cheers ere ere ere eres se sees ree ree reas 3
1.2 FEATURES... co cece teeth heehee eee ee eee 22h ££ oe £12 £1oe1oe1e see see see soe see see se see see see sees essen nese esse seen enee en 3
2. SPECIFICATION AND PARAMETER......cccoueeeinsunsssrsssrsssasssssosssssssssssssssssssssssssssssasssssosssssssss 4
2.1 LIMIT PARAMETER... ctttuttitteietetettie sete atest estes e setae settee eset e4e teem tebe 4 1e 42h e ea ES Ree 1e ee 4h eee bene eee eee en teense snes see en beans anne 4
2.2 OPERATING PARAMETER. .......ctitiieiteiteeteieeeeeeeesse sees ses ses see ees ses ee sees sees eens sees eens sees eens esses essence nese enas 4
3 SIZE AND PIN DEFINITION....cccconenrancssesssersssassssssssssssssssssssasssssssssssssassssssssssssssssssossasssssssssssssasss 5
4 CONNECT TO MCU..ccvruirsreossssosssssssssssssssassssssssassssssssssssssssssssssssssasssssossasssssssssssssssssssssssssssssssssssassss 6
S FUNCTION DESCRIPTION. ..ccutiinuiinsrmcsssssisssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss 6
5.1 FIXED TRANSMISSION ......ccuttuerterterterserseeses aes ses aes ses ses aes aes a esas ananassae sass ae asses esas assesses seas es sess es sess es sess e eee ere ene ere ene are aris 6
5.2 BROADCASTING TRANSMISSION... uutututeatete te sessessessessessessesses seers eae ase ase aae are are esos reese eres reese sree see see see see see see see sae see seeans 7
5.6.1 Indication Of UART OUIPUL..............c.ccoociiiiiie ieee eee sees 8
5.6.2 Indication of Wireless tFANSIIIING. ................ccccc.oiiiiie ieee eee eee eens 8
5.6.3 Configuration procedure Of MOGUIE. ...................c.ccooiiiiiiiiiiiiii ieee 9
5.6.4 NOLES Or AUX .....ciiiiiiii eee eather hehe eeete beeen ees 9
6 OPERATING MODE ......uuiiinuiinnrnninsssosssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssassssssss 10
6.1 J 6) 0 ET 1 (dF TOURS 10
62 NORMAL MODE (MODE Q)..eviueiieiiietite ieee sees sees ea sess sb eset es eens ea eens 11
6.3 WAKE-UP MODE (MODE 1)... cesses sess snes seen nes 11
6.4 POWER-SAVING MODE (MODE 2).......ctiuiiiiuiiieie ities sess sesso sass eases esas nse ssessssne ese 11
6.5 SLEEP MODE (MODE 3)....eciiiiiiiiiiie ieee sess sess esses senses esses sessed nesses ener 12
T COMMAND FORMAT ....ccoininnrmmesisssssssssssssssasssssssssssssssssssssssssssssssssssasssssssssssssasssssssssssssssssssssssssss 12
7.1 DEFAULT PARAMETERS
7.2 READING OPERATING PARAMETERS. 1. tt cutteeeittttirtttssteeestteesateesasee estes sssae esses sassesasstesassessasseanssesasssessssssssssnnsseesssensssensnn 13
7.3 READING VERSION NUMBER. +... tt tttteetttesitetsanteeastteesssessassssasesasssses asses sass asssesassssessssssanss asses asssessssessnsesssssesssssssssessnsees 13
T.4 RESET COMMAND. ....ctttiiitttitteeetttesstets ates estteessses sass ease eeassaesasses ses aassee ass sae sass eanse senses es see sense ante e es saeeasses snes ensbeeasnaesanes
7.5 PARAMETER SETTING COMMAND
8. HARDWARE DESIGN N...uucuuiiiriernensacsessussassessessossessessossssasssossssassssssssssssssssssssasssssossassssasssossosaosses 16
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 1

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
9.1 COMMUNICATION RANGE IS TOO SHORT. .......ettutiiute ates ate ateetie aie e see etse assesses eee ete assesses ames see ete ease sate sate ene ensea ates see eneennee as 17
9.2 MODULE IS EASY TO DAMAGE +. vetttuuttettteesttessrtetaaseeeattaes assesses santas assess sasssaasesassses assess sass aassesasssessssessnsessssseesssensanesnnn 17
9.3 BER(BIT ERROR RATE) IS HIGH. .....cuciuiiiiieiitieis ies nn snes nnne 17
10 PRODUCTION GUIDANCE... .uiciinniienssancossssssssassossssssssssssssssssossssssssssssssssssossssssssssssssssssssssssssses 17
11 E32 SERIES....ouiiiintiiinnaninsssssssssssssssssssssssssssosssssssssssossssssssssssssssssssssssssssssssssssssssssssssssssasssssssssssssses 18
12 ANTENNA RECOMMENDATION... ucccinumicncascssssssssossossssssssossssssssssssssssssosssssssssssossssssonssssssse 18
13 PACKAGE FOR BATCH ORDER........cutiiiiniiinrsscssssssssssssssssssssssssssssssssssssssssssssssssssssessssssssssse 19
REVISION HISTORY corvtteccccsrerseasocssssssassssssssesssssssssorsasssssssrsessssssssrsssssssssssssssssssssrsas sossssrsasssssssrsssssss 19
ABOUT US ctrrrreciscsrsssssossrsrssasssssssssasssssssssssssssssrorsssssssrsrsss sosssssssssssssssrsssssssssnessss s0000000es000000000000s0000000s 20
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 2

ebhe Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
1. Overview
1.1 Introduction
E32-170T30D is a wireless serial port module 43.00.17 mm
(UART) based on SEMTECH's SX1278 RF chip. LoRa
spread spectrum technology, TTL level output,
A
v
(@)
E32 1701300 EBYTE
WY ced
SN: 18011800001 Made in China
Manufacturer: EBYTE
FCC ID: 2ALPH-E32
compatible with 33V and 5V ( recommendation
4.75-5.5V > It has a great penetration ability. The
correcting ability on the software can be largely
increased at against disturbing. MN]
SX1278 features LoRa™, also it can bring longer
communication distance, and has the advantages of concentrated power density, meanwhile it has a very strong
confidentiality. The modules of 30dBm transmitting power are embedded with power amplifier (PA) and low noise
amplifier (LNA), which enhances the stability and longer communication range; the modules of 30dBm transmitting
power adopt industrial grade crystal oscillators to ensure the stability and consistency, its precision is lower than the
widely adopted 10ppm. It 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. The
encryption-decryption algorithm makes data interception meaningless. And 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 170MHz band;
Support air date rate of 0.3kbps~9.6kbps;
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 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;
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 3

ebhe Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
® Advanced Meter Reading Architecture( AMI);
® Automotive industry applications.
2. Specification and parameter
2.1 Limit parameter
Main parameter Performance Notes
Min. Max.
Power supply (VD 0 55 Voltage over 5.2V will cause permanent
damage to module
Blocking power (dBm> 10 Chances of burn is slim when modules
are used in short distance
Operating temperature (°C) -40 85 -
2.2 Operating parameter
Main parameter performance
: Notes
Min Typ. Max.
Operating voltage (V) 33 5.0 52 >5.0 V ensures output power
Communication level (V) 13 For 5V TTL, it may be at risk of
burning down
Operating temperature (°C) -40 - 85 Industrial design
Operating frequency (MHz) 160 - 173 Support ISM band
Power Transmitting current [mA] - 680 - Instant power consumption
consumptio Receiving current [mA] - 22 - -
n
Turn-off current [uA] - 5 - Software 1s shut down
Max Tx power (dBm) 29.3 - 305 -
Receiving sensitivity (dBm) -145 -147 -148 Air data rate 1s 2.4kbps
Air data rate (bps) Controlled via user's
0.3k 24k 9.6k }
programming
Main parameter Description Notes
Test condition : clear and open area, antenna gain: 5dBi,
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™
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.

ebhe Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
Communication interface TTL @33V
Package DIP
Connector 2.54mm
Size 24* 43mm
Antenna SMA-K 50 ohm impedance
3 Size and pin definition
)
24.0+0.1
)
12.810.
,
4.38
2.54
—
EEEEEIER =F “J 000GEOE
g 4.20%£0.1 —| aad
3.00
7 7 420 2.54
7 oo 125
7/7
—T
6.20
19.0
Toppad: 1.50 Bottom pad : 1.50
| m
0 00) [200 0.90 ime EL
1.50 1.50
|
oso [0] [2 00 0.000] [200
Pad quantity : 11
Unit: mm
No. Name Direction Function
| MO Input Work with M1 to decide 4 working modes of module (not suspended, if
(Weak pull-up) not used, could be grounded).
) MI Input Work with MO to decide 4 working modes of module (not suspended, if
(weak pull-up) 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.
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.

ebhe Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
4 XD Output TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can
be configured as open-drain or push-pull output
To indicate module * s working status & wakes up the external MCU.
5 AUX Output During the procedure of self-check initialization, the pin outputs low
level. Can be configured as push-pull output (suspending 1s allowed).
6 vce Input Power supply : 2.3~52V DC
7 GND Input Ground
8 Fixed orifice - Fixed orifice
9 Fixed onfice - Fixed onfice
10 Fixed onfice - Fixed onfice
ul MCU
19 18
—9 PC1 PCO Oo —
3 O Pcs PB7 ETE 5 i
—,9 PAO PB6 O 15 > g Mo i
— PA1 pPB5 © Sh 5 QO Mm El
E— PA2 USART RX © 1 bo : OQ RXD S
—O m3 USART_TX [O—~ . gq ™o E
— 9 VSS PB4 © 13 & J AUX | «
HY VDD PB3 ETE 8
a PDO PB2 ETE
—CO PBO PBT O———
vce 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.
5 Function description
5.1 Fixed transmission
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 6

ebhe Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
AA
\ p= AA BE ((
Address Channel
000304
AA
BB
(
Target address Target channel Data
-
» No output
Address Channel
© Address Channel
[8
» No output
Address Channel
5.2 Broadcasting transmission
FF FF 04 AA BB Ct
Address Channel Data
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
purpose of broadcast is realized.
5.4 Monitor address
® For example: Set the address of module A as OxFFFF, and the channel as 0x04;
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 7

ebhe Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
® 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.
® When AUX = 1, it does not mean that all the UART data of the module have been transmitted already, perhaps the
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 8

ebhe Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
last packet of data is still in transmission.
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.)
Timing Sequence Diagram of AUX when RXD pin receives
5.6.3 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 i
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,
1 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.
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.
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.
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 9

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
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.
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 UART and wireless channel are open, transparent | The receiver must work in
0 1 transmission 1s on mode 0 or mode 1
1 Wake up UART and wireless channel are open, the only | The receiver could be 0,1 or2
difference with mode 0 is that before transmitting data,
1 0 increasing the wake up code automatically, so that it can
awake the receiver under mode 3.
2 Power UART close, wireless is under air-awaken mode, after | transmitter must be mode 1,
saving 0 1 receiving data, UART open and send data. unable to transmit in this mode.
3 Sleep sleep mode, receiving parameter setting command is | more details on parameter
1 1 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 lms 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
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 10

ebhe Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
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.
6.2 Normal mode (mode 0)
‘When M1 = 0 & M0 = 0, module works in mode 0
The module can receive the user data via serial 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. During 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 0 can only be
received by the module working in mode 0 or 1.
Transmitti
ng
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.
Receiving | 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
Transmitting on the wake-up time set in the user parameters. The purpose of the preamble code is 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
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 11

EBYTE
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
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.
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
Notes AUX keeps low level and then outputs high level after reset completed. It is 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 .
No. Nlustration
format
1 CO+working C0 + 5 bytes working parameters are sent in hexadecimal format. 6 bytes in total and
parameters must be sent in succession, ( Save the parameters when power-down ).
2 CI+C1+C1 ( Save the parameters when power-down )
3 C2+working Three C1 are sent in hexadecimal format. The module returns the saved parameters and
parameters must be sent in succession.
12

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
C3+C3+C3
C2 + 5 bytes working parameters are sent in hexadecimal format. 6 bytes in total and
must be sent in succession. ( Do not save the parameters when power-down )
C4+C4+C4
Three C3 are sent in hexadecimal format. The module returns the version information
and they must be sent in succession.
7.1 Default parameters
Default parameter values: : C0 0000 1B 17 44
Model Frequency Address Channel Air data rate | Baud rate Panty Trane ne
E32-170T30D 170MHz 0x0000 0x28 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, Ml1=1) ,User gives the module instruction (HEX format): C3 C3 C3,Module
returns its present version number, for example C3 32 xx yy. the second bytes means frequency. 32
here means the frequency is 433MHZ, 38 means frequency is 470MHz, 45 means frequency is;
868MHz, 44 means the frequency is 915 MHz, 46 means the frequency 1s 170MHz; xx is the version
number and yy refers to the other module features.
7.4 Reset command
Instruction format Description
C4+C4+C4
In sleep mode (MO=1, MIi=1) ,
User gives the module instruction (HEX format): C4 C4 C4, the module resets for one time. During
the reset process, the module will conduct self-check, AUX outputs low level. After reset completing,
the AUX outputs high level, then the module starts to work regularly which the working mode can be
switched or be given another instruction.
7.5 Parameter setting command
No
Item Description Remark
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 13

ebhe Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
® Must be 0xCO or 0xC2
Fix 0xCO or 0xC2, it means this frame data is control command C0: Save the parameters when power-down
0 HEAD C2: Do not save the parameters when power-down
High address byte of module 00H-FFH
1 | ADDH ( the default 00H )
Low address byte of module 00H-FFH
2 | ADDL
( the default 00H )
7 6 UART parity bit
0 0 8N1 (default) ® UART mode can be different between
0 1 801 communication parties
1 0 8EL
1 1 8N1 (equal to 00)
5 4 3 TTL UART baud rate ( bps )
0 0 0 1200
0 0 1 2400 ® UART baud rate can be different between
0 1 0 4800 communication parties
0 1 1 9600 (default) ® The UART baud rate has nothing to do with
1 0 0 19200 wireless transmission parameters & won't
3 SPED 1 0 1 38400 affect the wireless transmit / receive features.
1 1 0 57600
1 1 1 115200
2 1 0 Air data rate ( bps)
0 0 0 0.3k
® The lower the air data rate, the longer the
0 0 1 1.2k
transmitting distance, better anti-interference
0 1 0 2 4k (default)
performance and longer transmitting time
0 1 1 4.8k
® The air data rate must keep the same for both
1 0 0 9.6k LL .
communication parties.
1 0 1 19.2k
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
4 CHAN
Communication channel 00H-36H, correspond to 160~173.5MHz
14

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
5 ~ 0, channel (160MHz+CHAN * 250KHz), default 28H
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
(170MHz)
. Fixed transmission enabling bit ( similar to ® In fixed transmission mode, the first three
MODBUS ) bytes of each user's data frame can be used as
0 Transparent transmission mode high/low address and channel. The module
changes its address and channel when
transmit. And it will revert to original setting
1 Fixed transmission mode after complete the process.
6 10 drive mode (default 1) ® This bit is used to the module internal pull-up
1 TXD and AUX push-pull outputs, RXD pull-up inputs resistor. It also increases the level's
adaptability in case of open drain. But in
0 TXD. AUX open-collector outputs, RXD some cases, it may need external pull-up
open-collector inputs
resistor.
5 4 3 wireless wake-up time ® The transmit & receive module work in mode
0 0 0 250ms (default) 0, whose delay time is invalid & can be
0 0 1 500ms arbitrary value.
0 1 0 750ms ® The transmitter works in mode 1 can transmit
0 1 1 1000ms the preamble code of the corresponding time
1 0 0 1250ms continuously.
1 0 1 1500ms ® When the receiver works in mode 2, the time
5 OPTIO 1 1 0 1750ms means the monitor interval time (wireless
N wake-up). Only the data from transmitter that
! ! ! 2000ms works in mode 1 can be received.
2 FEC switch
0 Tum off FEC
® After tum off FEC, the actual data
transmission rate increases while
anti-interference ability decreases. Also the
transmission distance is relatively short.
1 Turn on FEC (default) ® Both communication parties must keep on
the same pages about tum-on or turn-off
FEC.
The external power must make sure the ability
! 0 Transmission power (approximation) of current output more than 1A and ensure the
power supply ripple within 100mV.
0 Transmission power (approximation)
0 0 30dBm{default) Low power transmission is not recommended
0 0 27dBm due to its low power supply efficiency.
15

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
0 1 24dBm
1 0 21dBm
For example: The meaning of No.3 "SPED" byte:
The binary bit of the byte 7 6 5 4 3 2 1 0
Configures by user 0 0 0 1 1 0 1 0
Meaning UART parity bit 8N1 UART baud rate 1s 9600 Air data rate 1s 2.4k
Corresponding hexadecimal 1 A
8. Hardware design
It is 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
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 1s 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 ;
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 16

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
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.
9.2 Module is easy to damage
Please check the power supply source, ensure it is 2.0V~3.6V, voltage higher than 3.6V 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 full-sized 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
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 17

EBYTE
Chengdu Ebyte Electronic Technology Co,Ltd E32-170T30D user manual
permanently.
11 E32 series
Model No. Core IC Frequency Tx power | Distance Air Data Rate | Package Size Interface
Hz dBm km mm
E32-868T20S SX1276 868M 20 3 0.3k~19.2k SMD 16 * 26 UART
E32-915T208 SX1276 915M 20 3 0.3k~19.2k SMD 16 * 26 UART
E32-400T208 S$X1278 433M 470M 20 3 0.3k~19.2k SMD 16 * 26 UART
E32-915T308 SX1276 915M 30 8 0.3k~19.2k SMD > . UART
E32-868T30S SX1276 868M 30 8 0.3k~19.2k SMD > . UART
E32-433T30S S$X1278 433M 30 8 0.3k~19.2k SMD > . UART
E32-433T20S2T S$X1278 433M 20 3 0.3k~19.2k SMD 17 * 30 UART
E32-868T30D SX1276 868M 30 8 03~19.2k DIP 24% 43 SMA-K
E32-915T30D SX1276 915M 30 8 03~19.2k DIP 24% 43 SMA-K
E32-170T30D S$X1278 170M 30 8 0.3k~9.6k DIP 24% 43 SMA-K
E32-868T20D SX1276 868M 20 3 03~19.2k DIP 21*36 SMA-K
E32-915T20D SX1276 915M 20 3 03~19.2k 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
E32-433T27D S$X1278 433M 27 5 0.3k~19.2k DIP 24% 43 SMA-K
E32-433T20S1 S$X1278 433M 20 3 0.3k~19.2k SND . ) 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 | Interfa Gain X X
Model No. Type i Height Function feature
Hz ce dBi Cable
TX170-XP-200 | Sucker antenna 170M SMA-J 4 - 200cm- | Sucker antenna, High gain
TX170-JK-20 Rubber antenna 170M SMA-J 3 - - Flexible &omnidirectional
TX170-JK-11 Rubber antenna 170M SMA-J 25 - - Flexible &omnidirectional
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
18

(
SUB
Chengdu
Ebyte
Electronic
Technology
Co,Ltd
E32-170T30D
user
manual
13 Package for batch order
161.5+0.2
7 a
i)
o~
A
al ed _—
ox
o™~
==. —oC—0
Unit: mm
(a
!
ED
Each
Layer:
20
pcs
\: 4 Each Package: 5 layers
Revision history
Version Date Description Issued by
1.00 2017-11-10 Initial version huaa
1.10 2018-01-11 Updating E32 (868T30SYE32 (915T308) huaa
1.20 2018-01-15 Updating E32 (868T20S)E32 (915T20SY E32 (400T20S) huaa
Updating E32 (868T20DY E32 (868T30D)
1.30 2018-01-22 huaa
E32 (915T20DY E32 (915T30DY E32 (170T30D)
1.40 2018-05-24 Updating antenna option huaa
1.50 2018-10-11 Manual dividing huaa
1.60 2020-04-13 Ren
1.70 2020-04-15 du
1.80 2020-11-2 Change pin diagram Linson
Copyright ©2012-2019, Chengdu Ebyte Electronic Technology Co.,Ltd. 19