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

Disclaimer

EBYTE tana tanadin duk haƙƙoƙin wannan takaddar da bayanin da ke cikin nan. Samfura, sunaye, tambura da ƙira da aka siffanta anan gabaɗaya ko a wani ɓangare na iya zama ƙarƙashin haƙƙin mallakar fasaha. Sakewa, amfani, gyara ko bayyanawa ga ɓangarori na uku na wannan takaddar ko kowane ɓangarenta ba tare da takamaiman izinin EBYTE ba an haramta shi sosai.
An ba da bayanin da ke cikin nan "kamar yadda yake" kuma EBYTE ba ta da wani alhaki don amfani da bayanin. Ba a bayar da garanti, ko dai bayyananne ko bayyananne, wanda ya haɗa da amma ba'a iyakance shi ba, dangane da daidaito, daidaito, amintacce da dacewa don wata manufa ta musamman na bayanin. EBYTE na iya sake duba wannan takaddar a kowane lokaci. Don mafi yawan takardun kwanan nan, ziyarci www.cdebyte.com

Gabatarwa

Takaitaccen Gabatarwa
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.

 Siffofin

• 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;
• Yana goyan bayan samar da wutar lantarki na 2.7 ~ 5.5V, kuma duk wani wutar lantarki fiye da 5V zai iya tabbatar da mafi kyawun aiki;
• Industrial-grade standard design, support -40 ~ +85 ℃ for long time use;
• Module power can be up to 100mW (20dBm), transmission farther and more stable.

Aikace-aikace

• Ƙararrawa na tsaro na gida da shigarwa mara maɓalli mai nisa;
• Smart gida da na'urori masu auna firikwensin masana'antu da ƙari;
• Tsarin tsaro na ƙararrawa mara waya;
• Gina mafita ta atomatik;
• Wireless industrial grade remote controls;
• Kayayyakin kiwon lafiya;
• Advanced Meter Reading Architecture (AMI).

Ƙayyadaddun bayanai

RF sigogi 

RF sigogi	naúrar	Ayyuka			Magana
		Mafi ƙarancin daraja	Na al'ada daraja	Matsakaicin dabi'u
Matsakaicin Isar da Wuta	dBm	-	20	-	-
Karba Hankali	dBm	123	124	125	Air rate of 2.4kbps
Nisan Magana	M	-	5K	-	Clear and open, antenna gain 5dBi, antenna height 2.5 meters, air rate 2.4kbps.
Ƙwaƙwalwar Mitar Mai Aiki	MHz	410	433	441	Applicable to EWM32M-433T20S.
	MHz	862	900	930	Applicable to EWM32M-900T20S.
Yawan iska	bps	2.4K	2.4K	19.2K	Ikon shirin mai amfani
Toshewa iko	dBm	-	-10	-	Less probability of burnout in close proximity

Sigar lantarki

Sigar lantarki		UNI T	lambar samfurin		Magana
			EWM32M- 433T20S	EWM32M- 900T20S
aiki voltage		V	2.7 zuwa 5.5	2.7 zuwa 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	Hadarin ƙonawa ta amfani da 5V TTL
power consump tion	watsa Yanzu	mA	110	Transient power consumption @22dBm	Amfani da wutar lantarki nan take @22dBm
	Karɓi Yanzu	mA	8
	Barci Na Yanzu	uA	3	Kashe software	Kashe software
zafin aiki		℃	-40 + 85		Industrial Grade Design

Hardware sigogi

Hardware sigogi	Model Nnumber		Magana
	EWM32M-433T20S	EWM32M-900T20S
Modulation yanayin	LoRa		New generation of LoRa modulation technology
Yanayin Interface	1.27mm stamp rami
Sadarwa ion Interface	UART serial tashar jiragen ruwa		Babban darajar TTL
Transmit length	58 Bt ku		Maximum capacity of a single package, automatically divided into packages after exceeding it
Kunshin	SMD		-
Cache Iyawa	512Btye		-
Eriya	IPEX-1/Stamp Ramin		Equivalent impedance approx. 50Ω

Interface
Girma	14*20mm	± 0.2mm
Cikakken nauyi	2.0 g	± 0.1g

Girman Injini da Ma'anar Fin

EWM32M-433/900T20S Mechanical Dimensions and Pin Definitions

Pin No	Suna	Hanyar Pin	Amfanin Pin
1	GND	-	Module Ground
2	NC	-	Empty pin (not open for use, no need for user concern)
3	GND	-	Module Ground
4	GND	-	Module Ground
5	TX_EN	Fitowa	Used in conjunction with RX_EN to control external PA; left blank if not used

6	RX_EN	Fitowa	Used in conjunction with TX_EN to control external PA; left blank if ba a amfani
7	CLK	Shigarwa/fitarwa	SWCLK Clock pin for program loading (dangling, no need to be connected by the user)
8	DIO	Shigarwa/fitarwa	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	-	Module Ground
14	VCC	-	Module ikon tabbatacce tunani, voltage kewayon: 2.7 zuwa 5.5V DC
15	TXD	FITARWA	TTL serial output, connected to external RXD output pin;
16	RXD	Shigarwa	shigarwar serial TTL, an haɗa zuwa fil ɗin fitarwa na TXD na waje;
17	M1	Shigarwa	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	Shigarwa	In conjunction with M1, determines the 4 modes of operation for the module (not dangling, can be grounded if not in use)
19	AUX	Fitowa	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	- Shigarwa	Empty pin (not open for use, no need for user to care)
21	Sake saitin	Shigarwa	Module reset pin, low level reset.
22	GND	-	Module ƙasa
23	ANT	-	Antenna dubawa (high mita fitarwa sigina, 50 ohm halin impedance)
24	GND	-	Module Ground

Recommended Connectivity Charts

 

Ayyuka daki-daki

 Fired at a fixed point

 

Broadcast emission

• Adireshin watsa shirye-shirye
  • 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.
• Adireshin sauraro
  • 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.
• Sake saitin tsarin
  • 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
  • Ana amfani da AUX don nunin buffer transceiver mara waya da nunin gwajin kai.
  • 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;

Alamar watsa rediyo

• 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; Tsanaki

A'a	Bayanan kula na 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.

Yanayin aiki

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

Yanayin(0- 3)	M1	M0	Gabatarwa Yanayin	Magana
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 Yanayin ceton wuta	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 Yanayin barci

1

1

Module goes to sleep and can receive parameter setting commands

Cannot transmit in this mode

Mode switching precautions

A'a	Magana
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	Don misaliample, 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; Don misaliample, 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)

Nau'in

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

watsawa

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;
mai karɓa	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.

Yanayin WOR (yanayin 1)

Nau'in	When M0 = 1 and M1 = 0, the module operates in mode 1
watsawa	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.
mai karɓa	Daidai da yanayin 0.

Yanayin adana wutar lantarki (yanayin 2)

Nau'in	When M0 = 0 and M1 = 1, the module operates in mode 2
watsawa	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.
mai karɓa	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.

Yanayin barci mai zurfi (yanayi 3)

Nau'in	When M0 = 1 and M1 = 1, the module operates in mode 3
watsawa	Cannot transmit wireless data.
mai karɓa	Ba za a iya karɓar bayanan mara waya ba.
daidaitawa	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.
bayanin kula	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

Gabatarwar Umurni
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):

A'a	Tsarin umarni	Bayani
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	bayani
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

bayani

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

Sake saita umarni

command format	bayani
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

	Suna	Bayani				Magana
0	KAI	Kafaffen 0xC0 ko 0xC2, yana nuna cewa wannan bayanan firam umarni ne na sarrafawa				Dole ne ya zama 0xC0 ko C2 C0: The set parameters are saved by power- down. C2: The set parameters will not be saved by power-down.
1	ADDH	Babban adireshin Module (Tsoffin 00H)				00H-FFH
2	ADDL	Module adireshin ƙananan byte (tsoho 00H)				00H-FFH
3	SPED	7	6	Serial port daidaiton bit		Serial port modes can be different on both sides of the communication
		0	0	8N1 (tsoho)
		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	Serial Port baud kudi ne 1200
		0	0	1	Serial Port baud kudi ne 2400
		0	1	0	Serial Port baud kudi ne 4800
		0	1	1	Serial Port baud kudi ne 9600 (default)
		1	0	0	Serial Port baud kudi ne 19200
		1	0	1	Serial Port baud kudi ne 38400
		1	1	0	Serial Port baud kudi ne 57600
		1	1	1	Serial Port baud kudi ne 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	Rubuta 0

		tashar sadarwa									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	Yanayin watsa gaskiya
		1	Fixed-point transmission mode
		6	Yanayin tuƙin IO (tsoho 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)						Dole ne samar da wutar lantarki na waje 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 (tsoho)
		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
Wakilci				Serial port parity bit 8N1			Serial port baud rate of 9600					Air rate of 2.4k
Daidaitaccen hexadecimal				1					A

Ma'anar Tsohuwar Ma'aikata

Lambar samfurin

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

Model Model	mita	Adireshi	tashar	saurin iska	baud	Serial Port Format	ikon watsawa
EWM32M- 433T20S	433.125MH z	0 x0000	0 x17	2.4kbps	9600	8N1	20 dbm
EWM32M- 900T20S	868.125MH z	0 x0000	0 x12	2.4kbps	9600	8N1	20 dbm

AT umarni

• 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

Umarnin umarni	Bayani	Example	Example Bayanin
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	Shigar da yanayin haɓaka IAP
AT+SAKE STARWA	Na'urar sake yi	AT+SAKE STARWA	Sake kunna na'urar
A + DEFAULT	Configuration parameters are restored to default and the device reboots	A + DEFAULT	Configuration      parameters are restored to default

Saita umarnin	Bayani	Example	Example Bayanin
AT+UART=baud, daidaito	Setting the Baud Rate and Checksum	AT+UART=3,0	Set baud rate to 9600, 8N1
AT+RATE=kudi	Setting the Air Rate	AT+RATE=7	Saita ƙimar iska zuwa 19.2K
AT+WOR=rawar	Set WOR role and period	AT+WOR=0	Set to WOR receive
AT+POWER=power	Set Transmit Power	AT+power=0	Saita ikon watsawa zuwa 30dBm
AT+TRANS=yanayin	Setting the Transmit Mode	AT+TRANS=1	Set to fixed point mode

AT+LBT=lbt	Setting the Listen Before Canjin magana	AT+LBT=1	Set on, refer to section 7.5 LBT enable for details.
AT+ADDR=adr	Setting the Module Address	AT+ADDR=1234	Saita adireshin module zuwa 1234
AT+CHANNEL=tashar	Sets the module operating tashar	AT+CHANNEL=23	Saita mita zuwa 433.125M
AT + NETID = netid	Saita ID na hanyar sadarwa	AT+NETID=2	Saita ID na cibiyar sadarwa zuwa 2
AT+KEY=maɓalli	Saita maɓalli	AT+KEY=1234	Set module key to 1234
AT+DELAY= jinkiri	Setting the WOR delayed lokacin barci	AT+DELAY=1000	Set WOR delayed sleep time to 1000ms ku.
AT+SWITCH=canjawa	Setting         the        software switching mode switch	AT+SWITCH=1	Setting on and allowing software sauyawa
AT+SWITCH=canjawa	Setting         the        software switching mode switch	AT+SWITCH=1	Set on in configuration mode to allow software switching.
AT+MODE=mode	Switching Operating Mode	AT+MODE=0	Switch to pass-through mode

Umurnin tambaya	Bayani	Koma example	Example Bayanin
AT+TAIMAKO=?	Query AT Command Table		Return  to AT  Command Tebur
AT+DEVTYPE=?	Query       Module       Model Lamba	DEVTYPE=EWM32M- 433T20S	Return to Module Model Lamba
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	Koma zuwa ƙayyadadden yanayin batu
AT+LBT=?	Query Listen Before Talk sauya aiki	AT+LBT=1	Return to LBT switching matsayi
AT+ADDR=?	Query Module Address	AT+ADDR=1234	Return module address is 1234
AT+CHANNEL=?	Query  Module  Operating Tashoshi	AT+CHANNEL=23	Returns the frequency as 433.125M
AT+NETID=?	Query Network ID	AT+NETID=2	Returns the network ID as 2
AT+KEY=?	Query Module Key		Returns ERR
AT+JIKI=?	Tambayar WOR ta jinkirta barci lokaci	AT+DELAY=1000	Returns WOR delayed sleep time of 1000ms.
AT+SWITCH=?	Query software switch mode canza	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”.

Sigar umarni	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 (saurara kafin magana)	0:ku 1:ku
Addr（Module Address）	Adireshin Module 0 ~ 65535 (decimal)
Channel（module channel）	Module tashar 0 ~ 45 (dicimal)
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: Yanayin barci

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:

• Adireshin cibiyar sadarwa: 0～65535
• Mitar tashar: 0 ~ 45
• ID na hanyar sadarwa: 0～255
• Saukewa: 0-65535

Sanya kayan aiki

• 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;
• Da fatan za a duba wutar lantarki don tabbatar da cewa yana tsakanin adadin abin da aka ba da shawarartages, if it exceeds themaximum value it may cause permanent damage to the module;
• Da fatan za a duba daidaiton wutar lantarki, voltage kada ya canza sosai kuma akai-akai;
• 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;
• Module ya kamata ya kasance mai nisa kamar yadda zai yiwu daga samar da wutar lantarki, masu taswira, gyare-gyare mai yawa da sauran tsangwama na lantarki a cikin babban sashi;
• 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.

Matsalolin gama gari

Nisa watsawa mara gamsarwa

• 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;
• Abubuwan ƙarfe a kusa da eriya, ko sanya su a cikin harsashi na ƙarfe, ƙaddamar da siginar zai kasance mai tsanani;
• Wrong power register setting, air rate setting is too high (the higher the air rate, the closer the distance);
• Ƙara girmatage 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

• Da fatan za a duba wutar lantarki don tabbatar da cewa yana tsakanin adadin abin da aka ba da shawarartages, if it exceeds the maximum value it will cause permanent damage to the module;
• Da fatan za a duba daidaiton wutar lantarki, voltage can not be substantial frequent fluctuations;
• Please ensure that the installation and use process anti-static operation, high-frequency device electrostatic sensitivity;
• Da fatan za a tabbatar cewa shigarwa da amfani da tsari na zafi bai kamata ya zama mai girma ba, wani ɓangare na abubuwan da aka gyara don na'urori masu zafi;
• 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.

Zaɓin eriya

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

Umarnin walda

Zazzage zafin jiki

Maimaitawa Profile Halaye		Jagoran tsari taro	Haɗin tsari mara jagoranci
Preheating/rikewa	mafi ƙarancin zafin jiki (Tsmin)	100 ℃	150 ℃
	mafi yawan zafin jiki （Tsmax）	150 ℃	200 ℃
	Lokaci (Tsmin~Tsmin)	60-120s	60-120s
Juyin yanayin zafi (TL ~ Tp)		3℃/s，max	3℃/s，Max
Liquid-phase zafin jiki (TL)		183 ℃	217 ℃
Riƙe lokaci sama da TL		60 ~ 90s	60 ~ 90s
Mafi girman fakitin zazzabi 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” lakabi.
Time (Tp) within 5°C of the specified classification temperature (Tc), see the adadi mai zuwa		20s	30s
Sanyi gangara (Tp ~ TL)		6℃/s，Max	6℃/s，Max
Lokaci daga zafin daki zuwa kololuwa zafin jiki		6 min, max.	8 min, max.
※ Haƙuri mafi girma (Tp) na yawan zafin jiki profile an bayyana shi azaman babban iyaka mai amfani.

Zazzage zafin jiki

Samfura masu alaƙa

Samfurin Samfura	Carrier frequenc i Hz	watsawa sion iko dBm	Gwaji Nisa km	Saurin iska bps	Kunshin tsari	Samfura Girman mm	Fom ɗin eriya
Saukewa: E32-170T30D	170M	30	8	0.3k 9.6k	DIP	24*43	SMA-K
Saukewa: E32-433T20DC	433M	20	3	0.3k 19.2k	DIP	21*36	SMA-K
Saukewa: E32-433T20S1	433M	20	3	0.3k 19.2k	SMD	17*25.5	Stamp Ramuka
E32- 433T20S2T	433M	20	3	0.3k 19.2k	SMD	17*30	IPEX/Stamp Ramuka
Saukewa: E32-400T20S	433/470 M	20	3	0.3k 19.2k	SMD	16*26	IPEX/Stamp Ramuka
Saukewa: E32-433T30D	433M	30	8	0.3k 19.2k	DIP	24*43	SMA-K
Saukewa: E32-433T30S	433M	30	8	0.3k 19.2k	SMD	25*40.3	IPEX/Stamp Ramuka
Saukewa: E32-868T20D	868M	20	3	0.3k 19.2k	DIP	21*36	SMA-K
Saukewa: E32-868T20S	868M	20	3	0.3k 19.2k	SMD	16*26	IPEX/Stamp Ramuka
Saukewa: E32-868T30D	868M	30	8	0.3k 19.2k	DIP	24*43	SMA-K
Saukewa: E32-868T30S	868M	30	8	0.3k 19.2k	SMD	25*40.3	IPEX/Stamp Ramuka
Saukewa: E32-915T20D	915M	20	3	0.3k 19.2k	DIP	21*36	SMA-K
Saukewa: E32-915T20S	915M	20	3	0.3k 19.2k	SMD	16*26	IPEX/Stamp Ramuka
Saukewa: E32-915T30D	915M	30	8	0.3k 19.2k	DIP	24*43	SMA-K
Saukewa: E32-915T30S	915M	30	8	0.3k 19.2k	SMD	25*40.3	IPEX/Stamp Ramuka

Jagorar Antenna

Shawarar Eriya
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.

Samfurin Samfura	salo	mita band Hz	Interface	Riba dBi	Heightm m	Mai ciyarwa cm	Siffofin Aiki
Saukewa: TX433-JZ-5	Manne Stick Antenna	433M	SMA-J	2.0	52	-	Ultra Short Straight, Omni- Eriya ta hanya
Saukewa: TX433-JZG-6	Manne Stick Eriya	433M	SMA-J	2.5	62	-	Omni-Directional Eriya
Saukewa: TX433-JW-5	Rubber Stick Eriya	433M	SMA-J	2.0	50	-	Bent Rubber Stick, Omni- Directional Antenna
Saukewa: TX433-JWG-7	Rubber Stick Eriya	433M	SMA-J	2.5	75	-	Bent Rubber Stick, Omni Antenna
Saukewa: TX433-JK-11	Rubber Stick Eriya	433M	SMA-J	2.5	110	-	Bendable Rubber Stick, Omni- directional Antenna
Saukewa: TX433-XPL-100	Kofin tsotsa Eriya	433M	SMA-J	3.5	185	100	Small Suction Cup Antenna, Cost Mai tasiri
Saukewa: TX433-XP-200	Kofin tsotsa Eriya	433M	SMA-J	4.0	190	200	Neutral Suction Cup Antenna, Karancin Asara
Saukewa: TX433-XPH-300	Kofin tsotsa Eriya	433M	SMA-J	6.0	965	300	Large Suction Cup Antenna, High Riba
Saukewa: TX490-JZ-5	Rubber Stick Eriya	470/490M	SMA-J	2.0	50	-	Ultra Short Straight, Omni- directional Antenna
Saukewa: TX490-XPL-100	Kofin tsotsa Eriya	470/490M	SMA-J	3.5	120	100	Small Suction Cup Antenna, Cost Mai tasiri

Batch packing method

Tarihin bita

Sigar	Kwanan wata	Bayani	Wanda ya fitar
1.0	2025-01-23	Sigar farko	Lei
1.1	2025-02-07	Recommended Wiring Diagram to Add Reserved Pull-Up Resistor Description	Lei

Game da mu

• Goyon bayan sana'a: support@cdebyte.com
• Takardu da RF Saitin hanyar saukewa: www.cdebyte.com
• Na gode don amfani da samfuran Ebyte! Da fatan za a tuntuɓe mu da kowace tambaya ko shawarwari: info@cdebyte.com
• Waya: +86 028-61399028
• Web: www.cdebyte.com
• Adireshi: B5 Mold Park, 199# Xiqu Ave, Babban fasahar fasaha, Sichuan, China

Haƙƙin mallaka ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd.

Takardu / Albarkatu

EBYTE EWM32M-xxxT20S AT Directive 20dBm Small Form Factor LoRa Wireless Module [pdf] Manual mai amfani E32-170T30D, E32-433T20DC, E32-915T30D, E32-915T30S, EWM32M-xxxT20S AT Directive 20dBm Small Form Factor LoRa Wireless Module, EWM32M-xxxT20S, AT Directive 20dBm Small Form Factor LoRa Wireless Module, Small Form Factor LoRa Wireless Module, LoRa Wireless Module, Module

Magana

• Manual mai amfani