EBYTE EWM32M-xxxT20S AT Directive 20dBm Small Form Factor LoRa Wireless Module

Ymwadiad

Mae EBYTE yn cadw'r holl hawliau i'r ddogfen hon a'r wybodaeth a gynhwysir yma. Gall cynhyrchion, enwau, logos a dyluniadau a ddisgrifir yma fod yn gyfan gwbl neu'n rhannol yn destun hawliau eiddo deallusol. Gwaherddir atgynhyrchu, defnyddio, addasu neu ddatgelu'r ddogfen hon neu unrhyw ran ohoni i drydydd partïon heb ganiatâd penodol EBYTE.
Darperir y wybodaeth a gynhwysir yma “fel y mae” ac nid yw EBYTE yn derbyn unrhyw gyfrifoldeb am ddefnyddio'r wybodaeth. Ni roddir unrhyw warant, naill ai'n benodol neu'n ymhlyg, gan gynnwys ond heb fod yn gyfyngedig, mewn perthynas â chywirdeb, cywirdeb, dibynadwyedd a ffitrwydd at ddiben penodol y wybodaeth. Gall y ddogfen hon gael ei hadolygu gan EBYTE ar unrhyw adeg. Am y dogfennau mwyaf diweddar, ewch i www.cdebyte.com

Rhagymadrodd

Cyflwyniad Byr
EWM32M-xxxT20S series (UART) is an ultra-small size, low-cost wireless serial module (UART), and the E32 is fully compatible with the interoperability of the LORA communication technology, its transmit power of 20dBm, with a variety of transmission modes, working in the 433-band and the 900-band, TTL level output, compatible with the 3.3V IO port voltage.
EWM32M-xxxT20S has the advantages of longer communication distance, strong anti-interference ability, and strong confidentiality. The factory default air rate is 2.4kbps, and the transmit power is 20dBm, which improves the communication stability and extends the communication distance; the two modules in the figure below have the same power and different frequency bands.

 Nodweddion

• Adopts the new generation of LoRa spread spectrum modulation technology, which brings longer communication distance and stronger anti-interference ability;
• Supports serial port to upgrade firmware, which makes updating firmware more convenient;
• Supports AT command, which is more convenient to use;
• Supports FEC forward error correction, improving communication stability;
• Supports global license-free ISM 433MHz band or 868/915MHz EU common band;
• Supports users to set their own communication key and it cannot be read, which greatly improves the confidentiality of user data;
• Supports LBT function to listen to the channel environmental noise before sending, which can greatly improve the success rate of the module’s communication in harsh environments;
• Supports wireless parameter configuration, sending command packets wirelessly to remotely configure or read wireless module parameters;
• Supports Wake-on-Air, i.e., ultra-low power consumption function for battery-powered application solutions;
• Supports fixed-point transmission, broadcast transmission, and channel listening;
• Supports deep hibernation, the whole power consumption in this mode is about 3uA;
• Communication distance is up to 5km under ideal conditions;
• Parameters are saved when power down, and the module will work according to the set parameters after power up again;
• High-efficiency watchdog design, once an exception occurs, the module will be in automatic restart, and can continue to continue to work in accordance with the previous parameter settings;
• Supports data transfer rate of 2.4K to 19.2Kbps;
• Yn cefnogi cyflenwad pŵer 2.7 ~ 5.5V, a gall unrhyw gyflenwad pŵer sy'n fwy na 5V sicrhau'r perfformiad gorau;
• Industrial-grade standard design, support -40 ~ +85 ℃ for long time use;
• Module power can be up to 100mW (20dBm), transmission farther and more stable.

Cais

• Larymau diogelwch cartref a mynediad di-allwedd o bell;
• Cartref clyfar yn ogystal â synwyryddion diwydiannol a mwy;
• Systemau diogelwch larwm diwifr;
• Adeiladu datrysiadau awtomeiddio;
• Wireless industrial grade remote controls;
• Cynhyrchion gofal iechyd;
• Advanced Meter Reading Architecture (AMI).

Manyleb

Paramedrau RF 

RF paramedrau	uned	Perfformiadau			Sylw
		Isafswm gwerth	Nodweddiadol gwerth	Uchafswm gwerthoedd
Uchafswm Trosglwyddo Pŵer	dBm	–	20	–	–
Yn derbyn Sensitifrwydd	dBm	123	124	125	Air rate of 2.4kbps
Pellter Cyfeirnod	M	–	5K	–	Clear and open, antenna gain 5dBi, antenna height 2.5 meters, air rate 2.4kbps.
Band Amledd Gweithredu	MHz	410	433	441	Applicable to EWM32M-433T20S.
	MHz	862	900	930	Applicable to EWM32M-900T20S.
Cyfradd Aer	bps	2.4K	2.4K	19.2K	Rheolaeth rhaglenadwy defnyddiwr
Blocio grym	dBm	–	-10	–	Less probability of burnout in close proximity

Paramedrau trydanol

Paramedrau trydanol		UNI T	rhif model		Sylw
			EWM32M- 433T20S	EWM32M- 900T20S
gweithredu voltage		V	2.7～5.5	2.7～5.5	Output power is guaranteed at ≥3.3V, 5V typical, above 5.5V permanently burns out the module.
communications level		V	3.3V	3.3V	Risg o losgi i mewn gan ddefnyddio 5V TTL
power consump tion	Trosglwyddo Cyfredol	mA	110	Transient power consumption @22dBm	Defnydd pŵer ar unwaith @ 22dBm
	Derbyn Cyfredol	mA	8
	Cwsg Cerrynt	uA	3	Cau meddalwedd	Cau meddalwedd
tymheredd gweithredu		℃	-40～+85		Industrial Grade Design

Paramedrau caledwedd

Paramedrau caledwedd	Model Nnumber		Sylw
	EWM32M-433T20S	EWM32M-900T20S
Modiwleiddio modd	Lora		New generation of LoRa modulation technology
Modd Rhyngwyneb	1.27mm stamp twll
Cyfathrebu ion Interface	Porth cyfresol UART		Lefel TTL
Transmit length	58 Btye		Capasiti mwyaf sengl package, automatically divided into packages after exceeding it
Pecyn	SMD		–
Cache Gallu	512Btye		–
Antena	IPEX-1/Stamp Twll		Equivalent impedance approx. 50Ω

Rhyngwyneb
Dimensiwn	14*20mm	±0.2mm
Pwysau Net	2.0g	±0.1g

Dimensiynau Mecanyddol a Diffiniadau Pin

EWM32M-433/900T20S Mechanical Dimensions and Pin Definitions

Pin Rhif	Enw	Cyfeiriad Pin	Defnydd Pin
1	GND	–	Tir Modiwl
2	NC	–	Empty pin (not open for use, no need for user concern)
3	GND	–	Tir Modiwl
4	GND	–	Tir Modiwl
5	TX_EN	Allbwn	Used in conjunction with RX_EN to control external PA; left blank if not used

6	RX_EN	Allbwn	Used in conjunction with TX_EN to control external PA; left blank if heb ei ddefnyddio
7	CLK	Mewnbwn/Allbwn	SWCLK Clock pin for program loading (dangling, no need to be connected by the user)
8	DIO	Mewnbwn/Allbwn	SWDIO Data pin for program loading (dangling, no need to be connected by the user)
9	NC	–	Empty foot (not open for use, no need for users to care)
10	NC	–	Empty foot (not open for use, users do not need to care)
11	NC	–	Empty feet (not open for use, users do not need to care)
12	NC	–	Empty foot (not open to use, users do not need to care)
13	GND	–	Tir Modiwl
14	VCC	–	Cyfeirnod positif pŵer y modiwl, cyftage amrediad: 2.7 i 5.5V DC
15	TXD	ALLBWN	TTL serial output, connected to external RXD output pin;
16	RXD	Mewnbwn	Mewnbwn cyfresol TTL, wedi'i gysylltu â pin allbwn TXD allanol;
17	M1	Mewnbwn	TTL serial input, connected to the external TXD output pin; and M0, determines the module’s four operating modes (can not be suspended, if not used can be grounded)
18	M0	Mewnbwn	In conjunction with M1, determines the 4 modes of operation for the module (not dangling, can be grounded if not in use)
19	AUX	Allbwn	Used to indicate the working status of the module; the user wakes up the external MCU and outputs a low level during power-on self-test initialization; (can be suspended)
20	NC	-Mewnbwn	Empty pin (not open for use, no need for user to care)
21	AILOSOD	Mewnbwn	Module reset pin, low level reset.
22	GND	–	Modiwl daear
23	ANT	–	Rhyngwyneb antena (allbwn signal amledd uchel, rhwystriant nodweddiadol 50 ohm)
24	GND	–	Tir Modiwl

Recommended Connectivity Charts

 

Swyddogaethau yn fanwl

 Fired at a fixed point

 

Broadcast emission

• Cyfeiriad darlledu
  • Example: set module A address to 0xFFFF and channel to 0x04.
  • When module A is used as a transmitter (same mode, transparent transmission method), all receiving modules under channel 0x04 can receive the data for the purpose of broadcasting.
• Anerchiad gwrando
  • Example: set module A address to 0xFFFF and channel to 0x04.
  • When module A is used as a receive, it can receive all the data under channel 0x04 to achieve the purpose of listening.
• Ailosod modiwl
  • After the module is powered on, AUX will immediately output a low level, and carry out hardware self-test, as well as set up the working mode according to user parameters; During this process, AUX will keep low level, and when finished, AUX will output high level, and start to work normally according to the working mode combined by M1 and M0; Therefore, the user needs to wait for the rising edge of AUX as the starting point of normal operation of the module.
• AUX in detail
  • Defnyddir AUX ar gyfer dynodiad byffer transceiver di-wifr ac arwydd hunan-brawf.
  • It indicates whether the module has data that has not yet been transmitted out through the wireless, or whether the wireless data that has already been received has not yet been sent out in full through the serial port, or whether the module is in the process of initializing the self-test.
• Serial data output indication
  • is used for waking up an external MCU in hibernation;

Arwydd trosglwyddo radio

• Buffer Empty: the data in the internal 512 byte buffer are written to the wireless chip (automatic packetization).
• When AUX=1 when the user continuously initiates less than 512 bytes of data, will not overflow. When AUX=0 when the buffer is not empty: the internal 512-byte buffer data, not yet all written to the wireless chip and open the launch, at this time the module may be waiting for the end of the user’s data timeout, or are wireless sub-packet launch.
• [Note]: AUX=1 does not mean that all the serial data of the module have been launched through the wireless, or the last packet of data is being launched.

Module in the process of being configured

only when resetting and exiting hibernation mode; Rhybudd

Nac ydw	Nodiadau AUX
1	For function 1 and function 2 above, the output low level is prioritized, i.e.: when any of the output low level conditions are satisfied, the AUX outputs a low level; When all low level conditions are not satisfied, AUX outputs high level.
2	When AUX outputs low level, it indicates that the module is busy, and no working mode detection will be performed at this time; When the module AUX output high level within 1ms, will complete the mode switching work.
3	After the user switches to a new operating mode, at least 2ms after the rising edge of AUX is required for the module to actually enter that mode; If AUX stays high, then the mode switching will take effect immediately.
4	The module resets the user parameters when the user enters from mode 3 (sleep mode) or during a reset, during which the AUX output goes low.
5	Due to the characteristics of LoRa modulation, the information transmission delay is much longer than FSK, such as in 2.4kbps air speed, 100 bytes of transmission delay is about 1.5 seconds, it is recommended that customers do not carry out the transmission of large amounts of data at low air speeds, so as to avoid data loss due to the accumulation of data caused by the communication anomaly.

Modd gweithredu

The module has four operating modes, which are set by pins M1 and M0; details are shown in the table below:

Modd（0- 3）	M1	M0	Modd Rhagymadrodd	Sylw
0 General Mode	0	0	Serial open, wireless open, transparent transmission	The receiver must be mode 0, 1
1 Wake-up mode	0	1	Serial port open, wireless open; The only difference with mode 0: before the packet is transmitted, the wake-up code is automatically increased so as to wake up the receiver working in mode 2	Receiver can be mode 0 Receiver can be mode 1 Receiver can be mode 2
2 Modd arbed pŵer	1	0	Serial port reception is off, wireless is in Wake-on-Air mode, and when wireless data is received, the serial port is opened to send out the data.	Transmitter must be in mode 1

3 Modd cysgu

1

1

Module goes to sleep and can receive parameter setting commands

Cannot transmit in this mode

Mode switching precautions

Nac ydw	Sylw
1	Users can combine M1 and M0 with high and low levels to determine the module working mode. The 2 GPIOs of MCU can be used to control the mode switching; When changing M1, M0: If the module is idle, it can start working according to the new mode after 1ms; If the module has serial data that has not yet finished transmitting through wireless, it can enter the new working mode only after the transmitting is finished; If the module receives wireless data and sends out the data through the serial port, it needs to finish sending out before it can enter the new working mode; So the mode switching can only be effective when AUX outputs 1, otherwise the switching will be delayed.
2	Am gynample, if the user inputs a large amount of data continuously and switches modes at the same time, the switching mode operation is invalid at this time; the module will process all the user data before detecting a new mode;   So the general recommendation is: detect the output state of AUX pin, wait for 2ms after the output high level before switching.
3	When the module is switched to hibernate mode from other modes, if there is data that has not been processed;   The module will process this data (both receive and transmit) before entering sleep mode. This feature can be used for fast hibernation to save power consumption; for example: the transmitter module works in mode 0, the user initiates the serial data “12345”, and then does not have to wait for the AUX pin to be idle (high), it can be directly switched to hibernation mode and the user’s main MCU is immediately hibernated, and the module automatically sends all the user’s data wirelessly. After sending out all the user data through wireless, the module will automatically enter hibernation within 1ms; Thus saving MCU’s working time and reducing power consumption.
4	Similarly, any mode switching can utilize this feature, the module will automatically enter a new mode within 1ms after processing the current mode event; thus saving the user the work of querying the AUX, and can achieve the purpose of fast switching; Am gynample, switching from transmitter mode to receiver mode; the user MCU can also enter hibernation before mode switching, and use the external interrupt function to obtain the AUX change, so as to carry out mode switching.
5	This operation method is very flexible and efficient, completely designed in accordance with the user’s MCU operating convenience, and can minimize the workload of the entire system, improve system efficiency and reduce power consumption.

General mode (mode 0)

Math

When M0 = 0 and M1 = 0, the module operates in mode 0

trosglwyddydd

Module receives user data from the serial port, the module transmits wireless data packet length of 58 bytes, when the amount of data input by the user reaches 58 bytes, the module will start the wireless transmission, at this time, the user can continue to input the data that need to be transmitted; when the user needs to transmit bytes less than 58 bytes, the module waits for the 3 bytes of time, if there is no user data continue to input, it is considered to be the termination of the data, at this time, the module will be all the data packets

	through the wireless sent; when the module receives the first user data, will AUX output low level, when the module puts all the data into the RF chip and starts to transmit, AUX output high level;
derbynnydd	The module always turns on the wireless receive function and can receive packets sent from mode 0 and mode 1; After receiving the packet, the module AUX outputs a low level, and after a delay of 5ms, it starts to send out the wireless data through the TXD pin of the serial port, and after all the wireless data are output through the serial port, the module outputs the AUX to a high level.

modd WOR (modd 1)

Math	When M0 = 1 and M1 = 0, the module operates in mode 1
trosglwyddydd	The conditions for the module to start packet transmitting and the AUX function are equivalent to mode 0; the only difference is: the module will automatically add a wake-up code before each packet, and the length of the wake-up code depends on the wake-up time set in the user’s parameter; the wake-up code is intended to be used to wake up the receiver module working in mode 2; so the data transmitted in mode 1 can be received by modes 0, 1 and 2.
derbynnydd	Cyfwerth â modd 0.

Modd arbed pŵer (modd 2)

Math	When M0 = 0 and M1 = 1, the module operates in mode 2
trosglwyddydd	The module is in hibernation state, the serial port is closed and cannot receive the serial data from the external MCU, so this mode does not have the wireless transmitting function.
derbynnydd	In Mode 2, the transmitter is required to work in Mode 1; listen to the wake-up code at regular intervals, once a valid wake-up code is received, the module will continue to be in the receiving state and wait for the whole valid packet to be received; then AUX outputs a low level, and after a delay of 5ms, it opens the serial port and sends out the received wireless data through TXD, and after that, it outputs a high level from AUX; the module continues to enter the “sleep – listen” operating state (polling); by setting different wake-up times, the module has different receiving response delays (maximum 2s) and average power consumption (minimum 30u The wireless module continues to enter the “sleep-listening” working state (polling); by setting different wake-up times, the module has different reception response delays (up to 2s) and average power consumption (minimum 30uA); the user needs to achieve a balance between the communication delay time and the average power consumption.

Modd cysgu dwfn (modd 3)

Math	When M0 = 1 and M1 = 1, the module operates in mode 3
trosglwyddydd	Cannot transmit wireless data.
derbynnydd	Methu derbyn data diwifr.
cyfluniad	The hibernation mode can be used for module parameter setting, using the serial port 9600, 8N1, to set the module operating parameters through a specific command format.
nodyn	When entering from hibernation mode to other modes, the module will reconfigure the parameters, and during the configuration process, AUX stays low; when finished, it outputs a high level, so it is recommended that the

Register read/write control

Cyflwyniad Gorchymyn
The list of supported commands in hibernation mode (Mode 3: M0=1, M1=1) is as follows (only 9600, 8N1 format is supported at the time of setting):

Nac ydw	Fformat gorchymyn	Eglurhad
1	C0+Operating parameters	Send C0 + 5 bytes of operating parameters in hexadecimal format, totaling 6 bytes, must be sent continuously (power-down saved)
2	C1 + C1 + C1	Sending three C1 in hexadecimal format, the module returns the saved parameters, which must be sent continuously.
3	C2+Operating parameters	Sending C2+5 bytes of operating parameters in hexadecimal format, totaling 6 bytes, must be sent continuously (power down is not saved)
4	C3 + C3 + C3	Send three C3 in hexadecimal format, the module returns the version information, must be sent continuously.
5	C4 + C4 + C4	Send three C4 in hexadecimal format, the module will generate a reset, must be sent continuously.

Reading of operating parameters

command format	esboniad
C1 + C1 + C1	In hibernation mode (M0=1, M1=1), issue the command (in HEX format): C1 C1 C1, to the module serial port. The module will return the current configuration parameters, e.g., C0 00 00 1A 06 44.

Version number reading

command format

esboniad

C3 + C3 + C3

In sleep mode (M0=1, M1=1), send a command (in HEX format) to the module serial port: C3 C3 C3, the The module will return the current configuration parameters, for example: C3 32 XX YY; C3 is the command header, 32 represents the product model, XX represents the version number, YY represents the interface format + module maximum power value (hexadecimal). 0x10 for TTL interface, 0x40 for RS232, 0x80 for RS485

Ailosod gorchymyn

command format	esboniad
C4 + C4 + C4	In hibernation mode (M0=1, M1=1), send a command (in HEX format) to the module serial port: C4 C4 C4, the The module will generate a reset; During the reset process, the module performs a self-test and AUX outputs a low level; after the reset is completed, AUX outputs a high level and the module starts to work normally; At this time, mode switching or initiating the next command can be performed.

EWM32M-xxxT20S Register Description

	Enw	Disgrifiad				Sylw
0	PENNAETH	Sefydlog 0xC0 neu 0xC2, sy'n nodi bod y data ffrâm hwn yn orchymyn rheoli				Rhaid iddo fod yn 0xC0 neu C2 C0: The set parameters are saved by power- down. C2: The set parameters will not be saved by power-down.
1	ADDH	Cyfeiriad modiwl beit uchel (diofyn 00H)				00H-FFH
2	ADDL	Cyfeiriad modiwl beit isel (diofyn 00H)				00H-FFH
3	CYFLYMDER	7	6	Bit cydraddoldeb porth cyfresol		Serial port modes can be different on both sides of the communication
		0	0	8N1 (diofyn)
		0	1	8O1
		1	0	8E1
		1	1	8N1 (00 equivalent)
		5	4	3	TTL serial port rate（bps）	The baud rate of both sides can be different The serial port baud rate is independent of the wireless transmission parameters and does not affect the wireless transceiver characteristics.
		0	0	0	Cyfradd baud y porthladd cyfresol yw 1200
		0	0	1	Cyfradd baud y porthladd cyfresol yw 2400
		0	1	0	Cyfradd baud y porthladd cyfresol yw 4800
		0	1	1	Cyfradd baud y porthladd cyfresol yw 9600 （diofyn）
		1	0	0	Cyfradd baud y porthladd cyfresol yw 19200
		1	0	1	Cyfradd baud y porthladd cyfresol yw 38400
		1	1	0	Cyfradd baud y porthladd cyfresol yw 57600
		1	1	1	Cyfradd baud y porthladd cyfresol yw 115200
		2	1	0	Universal Radio Air Rate（bps）	The lower the air rate, the longer the distance, the stronger the anti-interference performance, and the longer the sending time. The airborne wireless transmission rate must be the same for both sides of the communication.
		0	0	0	Airspeed 2.4k
		0	0	1	Airspeed 2.4k
		0	1	0	Airspeed 2.4k（default）
		0	1	1	Airspeed 4.8k
		1	0	0	Airspeed 9.6k
		1	0	1	Airspeed 19.2k
		1	1	0	Airspeed 19.2k
		1	1	1	Airspeed 19.2k
4	CHAN	General Model
		7	6	5	Retain unused	Ysgrifennwch 0

		sianel gyfathrebu									00H-1FH, corresponding to 410～441MHz 00H-45H, corresponding to 862-930MHz
		4 – 0, corresponding to (410MHz + CHAN * 1MHz), default 17H (433MHz) (for 400 band) 4 – 0, corresponds to (862MHz + CHAN * 1MHz), default 06H (868MHz) (applicable to 900 band)
5	OPTIO N.	7	Fixed-point transmit enable bit (MODBUS-like)								When it is 1, the first 3 bytes of each user data frame are used as high and low address and channel. When transmitting, the module changes its own address and channel, and when finished, restores the original settings.
		0	Modd trosglwyddo tryloyw
		1	Fixed-point transmission mode
		6	Modd gyriant IO (diofyn 1)								This bit is used to enable the module’s internal pull-up resistor. The open drain method level adaptation is more robust and may require an external pull-up resistor in some cases.
		1	TXD, AUX push-pull outputs, RXD pull-up inputs
		0	TXD, AUX open output, RXD open input
		5	4		3	Wireless Wake-Up Time					Both transceiver modules work in mode 0. This delay time is invalid and can be any value; The transmitter works in mode 1 and will continuously transmit the wake-up code for the corresponding time; The receiver works in mode 2, this time is the listening interval time (wireless wake-up) of the receiver, and can only receive data from the transmitter working in mode 1.
		0	0		0	250ms（default）
		0	0		1	500ms
		0	1		0	750ms
		0	1		1	1000ms
		1	0		0	1250ms
		1	0		1	1500ms
		1	1		0	1750ms
		1	1		1	2000ms
		2	FEC Switch								When FEC is turned off, the actual data transmission rate is increased, but the anti-interference ability is weakened, and the distance is slightly closer, so please choose according to the actual application; Both sides of communication must be on or off.
		0	Turn off FEC error correction
		1	Turn on FEC error correction (default)
		1	0		Transmit power (approximate)						Rhaid i'r cyflenwad pŵer allanol ddarparu more than 250mA of current output capability and ensure that the power supply ripple is less than 100mV; It is not recommended to use lower power transmission, its power utilization efficiency is not high.
		0	0		20dBm (diofyn)
		0	1		17dBm
		1	0		14dBm
		1	1		10dBm
Example (Meaning of the byte “SPED” in serial number 3):
Binary bits of this byte				7		6	5	4		3		2	1	0
Specific value (user-configurable)				0		0	0	1		1		0	1	0
Cynrychiolaeth				Serial port parity bit 8N1			Serial port baud rate of 9600					Air rate of 2.4k
Hecsadegol cyfatebol				1					A

Paramedr Diofyn Ffatri

Rhif model

Factory default parameter value: C0 00 09 00 00 00 1A 00 17 03 00 00

Model Modiwl	amlder	Cyfeiriad	sianel	cyflymder aer	baud	Serial Port Format	pŵer trosglwyddo
EWM32M- 433T20S	433.125MH z	0x0000	0x17	2.4kbps	9600	8N1	20dbm
EWM32M- 900T20S	868.125MH z	0x0000	0x12	2.4kbps	9600	8N1	20dbm

AT gorchymyn

• Using AT instructions for parameter configuration or querying needs to be done in the configuration mode;
• AT instructions are used in the configuration mode. AT instructions are divided into three categories in total: command instructions, setup instructions and query instructions;
• Users can pass “AT+HELP=?” Query to the AT instruction set supported by the module, the baud rate adopted by AT instruction is 9600 8N1;
• Will be limited when the input parameters exceed the range, please do not let the parameters exceed the range to avoid unknown situation.

AT command table

Cyfarwyddyd gorchymyn	Disgrifiad	Example	Example Disgrifiad
AT+IAP (use with caution, see this article 8.3 Notes on Upgrading Firmware on Serial Ports for details)	Entering IAP upgrade mode	AT+IAP	Rhowch fodd uwchraddio IAP
AT+AILOSOD	Ailgychwyn dyfais	AT+AILOSOD	Ailgychwyn y ddyfais
YN + DIFFYG	Configuration parameters are restored to default and the device reboots	YN + DIFFYG	Configuration      parameters are restored to default

Gorchymyn gosod	Disgrifiad	Example	Example Disgrifiad
AT + UART = baud, cydraddoldeb	Setting the Baud Rate and Siecswm	AT+UART=3,0	Set baud rate to 9600, 8N1
AT+RATE=cyfradd	Setting the Air Rate	AT+RATE=7	Gosodwch y gyfradd aer i 19.2K
AT+WOR=rôl	Set WOR role and period	AT+WOR=0	Set to WOR receive
AT+POWER=pŵer	Set Transmit Power	AT+POWER=0	Gosodwch y pŵer trosglwyddo i 30dBm
AT+TRANS=modd	Setting the Transmit Mode	AT+TRANS=1	Set to fixed point mode

AT+LBT=lbt	Setting the Listen Before Newid switsh	AT+LBT=1	Set on, refer to section 7.5 LBT enable for details.
AT+ADDR=addr	Setting the Module Address	AT+ADDR=1234	Gosod cyfeiriad y modiwl i 1234
AT+CHANNEL=sianel	Sets the module operating sianel	AT+CHANNEL=23	Gosod amlder i 433.125M
AT+NETID=netid	Gosod ID y Rhwydwaith	AT+NETID=2	Gosodwch ID y rhwydwaith i 2
AT+KEY=allwedd	Gosod allwedd modiwl	AT+ALLWEDDOL=1234	Set module key to 1234
AT+DELAY=oedi	Setting the WOR delayed amser cysgu	AT+OEDI=1000	Set WOR delayed sleep time to 1000 ms.
AT+SWITCH=newid	Setting         the        software switching mode switch	AT+SWITCH=1	Setting on and allowing software newid
AT+SWITCH=newid	Setting         the        software switching mode switch	AT+SWITCH=1	Set on in configuration mode to allow software switching.
AT+MODE=modd	Switching Operating Mode	AT+MODE=0	Switch to pass-through mode

Gorchymyn ymholiad	Disgrifiad	Dychwelyd example	Example Disgrifiad
AT+HELP=?	Query AT Command Table		Return  to AT  Command Tabl
AT+DEVTYPE=?	Query       Module       Model Rhif	DEVTYPE=EWM32M- 433T20S	Return to Module Model Rhif
AT+FWCODE=?	Query Firmware Code	FWCODE=xxxx-x-xx	Return to Firmware Version
AT+UART=?	Query baud rate and parity	AT+UART=3,0	Returns baud rate of 9600, 8N1
AT+RATE=?	Query Air Rate	AT+RATE=7	Returns the air rate as 19.2K
AT+WOR=?	Query WOR Role	AT+WOR=0	Return to WOR receive
AT+POWER=?	Query Transmit Power	AT+POWER=0	Return to transmit power 20dBm
AT+TRANS=?	Query Transmit Mode	AT+TRANS=1	Dychwelyd i'r modd pwynt sefydlog
AT+LBT=?	Query Listen Before Talk switsh swyddogaeth	AT+LBT=1	Return to LBT switching statws
AT+ADDR=?	Query Module Address	AT+ADDR=1234	Return module address is 1234
AT+CHANNEL=?	Query  Module  Operating Sianel	AT+CHANNEL=23	Returns the frequency as 433.125M
AT+NETID=?	Query Network ID	AT+NETID=2	Returns the network ID as 2
AT+ALLWEDDOL=?	Query Module Key		Returns ERR
AT+OEDI=?	Ymholiad WOR oedi cwsg amser	AT+OEDI=1000	Returns WOR delayed sleep time of 1000ms.
AT+SWITCH=？	Query software switch mode swits	AT+SWITCH=0	Software switching mode off
AT+MODE=？	Query      current      working	AT+MODE=0	Returns the current pass-

mode (all modes can be queried)

through mode

AT Parameter Analysis
When the serial port receives the correct command, the serial port will return “Command = OK”, otherwise it will return “=ERR”.

Paramedr gorchymyn	Parameter significance
Baud（serial port baud rate）	0:1200        1:2400        2:4800        3:9600 4:19200      5:38400      6:57600      7:115200
Parity（serial port parity bit）	0:8N1           1:8O1           2:8E1           3:8N1
Rate（airspeed）	0:2.4K         1:2.4K         2:2.4K         3:4.8K 4:9.6K         5:19.2K         6:19.2K    7:19.2K
Role（WOR role）	0:Receive 1:Send
Period（WOR cycle）	0:500ms      1:1000ms    2:1500ms    3:2000ms 4:2500ms    5:3000ms    6:3500ms    7:4000ms
Power（transmission power）	0:20dBm      1:17dBm      2:14dBm      3:10dBm
Mode（transfer mode）	0:Transparent 1:Fixed point
LBT (gwrandewch cyn siarad)	0:i ffwrdd 1:ymlaen
Addr（Module Address）	Cyfeiriad modiwl 0~65535 (degol)
Channel（module channel）	Sianel modiwl 0 ~ 45 (degol)
Netid（Internet ID）	Module Network 0~255 (decimal)
Key（keys）	Module Key 0~65535 (decimal)
Delay（WOR delayed sleep）	Delay Sleep 0~65535 (decimal)
Mode(operating mode)	0: Transmission mode 1: Wake-up mode 2: Power saving mode 3: Modd cysgu

Serial Port Upgrade Firmware Notes
If customers need to upgrade the firmware, they need to find the corresponding BIN file provided by the official, and then use the upper computer provided by the official to upgrade the firmware, generally users do not need to upgrade the firmware, please do not use the “AT+IAP” command.
The necessary pins for upgrading must be pinned out (M1, M0, AUX, TXD, RXD, VCC, GND), and then send “AT+IAP” command to enter the upgrade mode in the configuration mode, if you need to exit the IAP upgrade mode, you need to keep powering up and wait for 60 seconds, and the program will be automatically exited, or else it will enter the upgrade mode indefinitely even if it is rebooted. If you need to exit IAP upgrade mode, you need to keep power on and wait for 60 seconds, the program will exit automatically, otherwise, even if you reboot, it will enter upgrade mode indefinitely. After entering the upgrade mode, the baud rate will be automatically switched to 115200 until it exits automatically, during which a log will be output.

Configuration instructions for the host computer

The following figure shows the configuration upper display interface of EWM32M-900T20S as an example. Users can switch to the command mode through M0 and M1 for quick configuration and reading of parameters in the upper display.

In the configuration of the host computer, the module address, frequency channel, network ID, and key are in decimal display mode; where each parameter takes the range of values:

• Cyfeiriad rhwydwaith: 0～65535
• Sianel amledd: 0～45
• ID rhwydwaith: 0～255
• Allwedd: 0～ 65535

Dyluniad caledwedd

• It is recommended to use a DC regulated power supply to power this module, the power supply ripple factor should be as small as possible, and the module should be reliably grounded;
• Please pay attention to the correct connection of the positive and negative terminals of the power supply, such as reverse connection may cause permanent damage to the module;
• Gwiriwch y cyflenwad pŵer i sicrhau ei fod rhwng y cyflenwad a argymhellir cyftages, if it exceeds themaximum value it may cause permanent damage to the module;
• Gwiriwch sefydlogrwydd y cyflenwad pŵer, y cyftagd ni ddylai amrywio'n sylweddol ac yn aml;
• In the design of power supply circuit for the module, it is often recommended to retain more than 30% of the margin, there is the whole machine is conducive to long-term stable work;
• Dylai'r modiwl fod mor bell â phosibl o'r cyflenwad pŵer, trawsnewidyddion, aliniadau amledd uchel ac ymyrraeth electromagnetig arall yn y rhan fwyaf;
• High-frequency digital alignment, high-frequency analog alignment, power supply alignment must be avoided below the module, if you really need to go through the module below, assuming that the module is welded in the Top Layer, the Top Layer in the contact part of the module to lay the ground copper (all paved with copper and a good ground), it must be close to the digital part of the module and alignment in the Bottom Layer;
• Assuming that the module is soldered or placed in the Top Layer, it is also wrong to randomly route the module in the Bottom Layer or any other layer, which will affect the spuriousness of the module as well as the reception sensitivity to varying degrees;
• Assuming that there is a large electromagnetic interference around the module device will also greatly affect the performance of the module, according to the intensity of the interference is recommended to stay away from the module, if the situation permits you can do appropriate isolation and shielding;
• Assume that there is a large electromagnetic interference around the module alignment (high-frequency digital, high-frequency analog, power supply alignment) will also greatly affect the performance of the module, according to the intensity of the interference is recommended to be appropriate away from the module, if the situation permits you can do appropriate isolation and shielding;
• Communication line if you use 5V level, must be connected in series with 1k-5.1k resistor (not recommended, there is still a risk of damage);
• Try to stay away from some TTL protocols where the physical layer is also 2.4GHz, e.g. USB3.0;
• The antenna mounting structure has a big impact on the module performance, make sure the antenna is exposed and preferably vertically upward;
• When the module is installed inside the chassis, use a good quality antenna extension cable to extend the antenna to the outside of the chassis;
• The antenna must not be installed inside the metal shell, which will lead to a great weakening of the transmission distance.

Problemau cyffredin

Pellter trosglwyddo anfoddhaol

• When there are linear communication barriers, the communication distance will decay accordingly;
• Temperature, humidity, and co-channel interference, which will lead to higher communication packet loss rate;
• The ground absorbs and reflects radio waves, and the test results are poorer near the ground;
• Seawater has a strong ability to absorb radio waves, so the effect of the seaside test is poor;
• Gwrthrychau metel ger yr antena, neu wedi'u gosod mewn cragen fetel, bydd y gwanhad signal yn ddifrifol iawn;
• Wrong power register setting, air rate setting is too high (the higher the air rate, the closer the distance);
• Cyf iseltage of power supply at room temperature is lower than the recommended value, the lower the voltage the lower the hair power;
• The use of antenna and module matching degree is poor or the antenna itself quality problems.

Modules are fragile

• Gwiriwch y cyflenwad pŵer i sicrhau ei fod rhwng y cyflenwad a argymhellir cyftages, if it exceeds the maximum value it will cause permanent damage to the module;
• Gwiriwch sefydlogrwydd y cyflenwad pŵer, y cyftage can not be substantial frequent fluctuations;
• Please ensure that the installation and use process anti-static operation, high-frequency device electrostatic sensitivity;
• Gwnewch yn siŵr na ddylai lleithder y broses osod a defnyddio fod yn rhy uchel, rhan o'r cydrannau ar gyfer dyfeisiau sy'n sensitif i leithder;
• If there is no special demand is not recommended to be used at too high or too low a temperature.

BER is too high

• Near the same frequency signal interference, away from the source of interference or modify the frequency and channel to avoid interference;
• Poor power supply may also cause garbled code, be sure to ensure the reliability of the power supply;
• Extension cords, feeder cords of poor quality or too long, can also cause high BER.

Dewis Antena

Enable both the IPEX-1 interface and the stamp hole interface at the same time, the IPEX-1 interface and the stamp hole interface can be selected at will

Cyfarwyddiadau weldio

Tymheredd reflow

Reflow Profile Nodweddion		Arwain y cynulliad proses	Cydosod proses di-blwm
Cynhesu / Dal	tymheredd isaf （Tsmin）	100 ℃	150 ℃
	tymheredd uchaf （Tsmax）	150 ℃	200 ℃
	Amser (Tsmin ~ Tsmin)	60-120s	60-120s
llethr codiad tymheredd (TL ~ Tp)		3℃/s，max	3℃/s，Max
tymheredd cyfnod hylif (TL)		183 ℃	217 ℃
Dal amser uwchben TL		60 ~ 90au	60 ~ 90au
Tymheredd pecyn brig Tp		Users must not exceed the temperature indicated on the product’s “Moisture Sensitivity” label.。	The user must not exceed the temperature indicated on the product’s “Moisture Sensitivity” label.
Time (Tp) within 5°C of the specified classification temperature (Tc), see the ffigur canlynol		20s	30s
Llethr oeri (Tp~TL)		6℃/s，Max	6℃/s，Max
Amser o dymheredd ystafell i uchafbwynt tymheredd		6 munud, uchafswm.	8 munud, uchafswm.
※ Goddefgarwch tymheredd brig (Tp) y pro tymhereddfile yn cael ei ddiffinio fel terfyn uchaf y defnyddiwr.

Tymheredd reflow

Modelau Cysylltiedig

Model Cynnyrch	Carrier frequenc ies Hz	trosglwyddiad sion grym dBm	Prawf Pellter km	Cyflymder aer bps	Pecyn ffurf	Cynnyrch Maint mm	Ffurf antena
E32-170T30D	170M	30	8	0.3k～ 9.6k	DIP	24*43	SMA-K
E32-433T20DC	433M	20	3	0.3k～ 19.2k	DIP	21*36	SMA-K
E32-433T20S1	433M	20	3	0.3k～ 19.2k	SMD	17*25.5	Stamp Tyllau
E32- 433T20S2T	433M	20	3	0.3k～ 19.2k	SMD	17*30	IPEX/Stamp Tyllau
E32-400T20S	433/470 M	20	3	0.3k～ 19.2k	SMD	16*26	IPEX/Stamp Tyllau
E32-433T30D	433M	30	8	0.3k～ 19.2k	DIP	24*43	SMA-K
E32-433T30S	433M	30	8	0.3k～ 19.2k	SMD	25*40.3	IPEX/Stamp Tyllau
E32-868T20D	868M	20	3	0.3k～ 19.2k	DIP	21*36	SMA-K
E32-868T20S	868M	20	3	0.3k～ 19.2k	SMD	16*26	IPEX/Stamp Tyllau
E32-868T30D	868M	30	8	0.3k～ 19.2k	DIP	24*43	SMA-K
E32-868T30S	868M	30	8	0.3k～ 19.2k	SMD	25*40.3	IPEX/Stamp Tyllau
E32-915T20D	915M	20	3	0.3k～ 19.2k	DIP	21*36	SMA-K
E32-915T20S	915M	20	3	0.3k～ 19.2k	SMD	16*26	IPEX/Stamp Tyllau
E32-915T30D	915M	30	8	0.3k～ 19.2k	DIP	24*43	SMA-K
E32-915T30S	915M	30	8	0.3k～ 19.2k	SMD	25*40.3	IPEX/Stamp Tyllau

Canllaw Antena

Argymhelliad Antena
Antenna is an important role in the communication process, often poor-quality antenna will have a great impact on the communication system, so we recommend some of the antennas as a supporting our wireless module and the performance is more excellent and reasonably priced antennas.

Model Cynnyrch	arddull	amlder band Hz	Rhyngwyneb	Ennill DBI	Heightm m	Porthwr cm	Nodweddion Swyddogaethol
TX433-JZ-5	Ffon Glud Antenâu	433M	SMA-J	2.0	52	–	Ultra Short Straight, Omni- Antena Cyfeiriadol
TX433-JZG-6	Ffon Glud Antena	433M	SMA-J	2.5	62	–	Antena Omni-Cyfeiriadol
TX433-JW-5	Rubber Stick Antena	433M	SMA-J	2.0	50	–	Bent Rubber Stick, Omni- Directional Antenna
TX433-JWG-7	Rubber Stick Antena	433M	SMA-J	2.5	75	–	Bent Rubber Stick, Omni Antenna
TX433-JK-11	Rubber Stick Antena	433M	SMA-J	2.5	110	–	Bendable Rubber Stick, Omni- directional Antenna
TX433-XPL-100	Cwpan sugno Antena	433M	SMA-J	3.5	185	100	Small Suction Cup Antenna, Cost Effeithiol
TX433-XP-200	Cwpan sugno Antena	433M	SMA-J	4.0	190	200	Neutral Suction Cup Antenna, Colled Isel
TX433-XPH-300	Cwpan sugno Antena	433M	SMA-J	6.0	965	300	Large Suction Cup Antenna, High Ennill
TX490-JZ-5	Rubber Stick Antena	470/490M	SMA-J	2.0	50	–	Ultra Short Straight, Omni- directional Antenna
TX490-XPL-100	Cwpan sugno Antena	470/490M	SMA-J	3.5	120	100	Small Suction Cup Antenna, Cost Effeithiol

Batch packing method

Hanes adolygu

Fersiwn	Dyddiad	Disgrifiad	Cyhoeddwyd gan
1.0	2025-01-23	Fersiwn gychwynnol	Lei
1.1	2025-02-07	Recommended Wiring Diagram to Add Reserved Pull-Up Resistor Description	Lei

Amdanom ni

• Cymorth technegol: cefnogaeth@cdebyte.com
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