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

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Вовед

Краток вовед
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.

 Карактеристики

• 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;
• Поддржува напојување од 2.7~5.5V, а секое напојување поголемо од 5V може да обезбеди најдобри перформанси;
• Industrial-grade standard design, support -40 ~ +85 ℃ for long time use;
• Module power can be up to 100mW (20dBm), transmission farther and more stable.

Апликација

• Домашни безбедносни аларми и далечински влез без клуч;
• Паметен дом, како и индустриски сензори и многу повеќе;
• Безжични алармни безбедносни системи;
• Решенија за автоматизација на згради;
• Wireless industrial grade remote controls;
• Здравствени производи;
• Advanced Meter Reading Architecture (AMI).

Спецификација

RF параметри 

RF параметри	единица	Настапи			Забелешка
		Минимум вредност	Типично вредност	Максимум вредности
Максимум Пренос на енергија	dBm	–	20	–	–
Примање Чувствителност	dBm	123	124	125	Air rate of 2.4kbps
Референтно растојание	M	–	5K	–	Clear and open, antenna gain 5dBi, antenna height 2.5 meters, air rate 2.4kbps.
Оперативен опсег на фреквенција	MHz	410	433	441	Applicable to EWM32M-433T20S.
	MHz	862	900	930	Applicable to EWM32M-900T20S.
Стапка на воздух	bps	2.4 илјади	2.4 илјади	19.2 илјади	Корисничка програмабилна контрола
Блокирање моќ	dBm	–	-10	–	Less probability of burnout in close proximity

Електрични параметри

Електрични параметри		УНИ T	број на модел		Забелешка
			EWM32M- 433T20S	EWM32M- 900T20S
оперативен волtage		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	Ризик од изгорување со користење на 5V TTL
power consump tion	Пренеси струја	mA	110	Transient power consumption @22dBm	Моментална потрошувачка на енергија @22dBm
	Примање струја	mA	8
	Струја на спиење	uA	3	Исклучување на софтверот	Исклучување на софтверот
работна температура		℃	-40 и 85		Industrial Grade Design

Хардверски параметри

Хардверски параметри	Model Nnumber		Забелешка
	EWM32M-433T20S	EWM32M-900T20S
Модулација режим	Лора		New generation of LoRa modulation technology
Режим на интерфејс	1.27mm stamp дупка
Комуницирајте ion Interface	UART сериска порта		Ниво на TTL
Transmit length	58 Btye		Максимален капацитет на еден package, automatically divided into packages after exceeding it
Пакет	SMD		–
Кеш Капацитет	512Btye		–
Антена	IPEX-1/Stamp Дупка		Equivalent impedance approx. 50Ω

Интерфејс
Димензија	14*20мм	± 0.2 мм
Нето Тежина	2.0 гр	± 0.1 g

Механички димензии и дефиниции на пиновите

EWM32M-433/900T20S Mechanical Dimensions and Pin Definitions

Пин бр	Име	Пин насока	Употреба на пинови
1	ГНД	–	Заземјување на модулот
2	NC	–	Empty pin (not open for use, no need for user concern)
3	ГНД	–	Заземјување на модулот
4	ГНД	–	Заземјување на модулот
5	TX_MK	Излез	Used in conjunction with RX_EN to control external PA; left blank if not used

6	RX_MK	Излез	Used in conjunction with TX_EN to control external PA; left blank if не се користи
7	CLK	Влез/Излез	SWCLK Clock pin for program loading (dangling, no need to be connected by the user)
8	ДИО	Влез/Излез	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	ГНД	–	Заземјување на модулот
14	VCC	–	Позитивна референца за моќност на модулот, кнtagопсег: 2.7 до 5.5 V DC
15	TXD	ИЗЛЕЗ	TTL serial output, connected to external RXD output pin;
16	RXD	Влез	TTL сериски влез, поврзан со надворешен излез TXD пин;
17	M1	Влез	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	Влез	In conjunction with M1, determines the 4 modes of operation for the module (not dangling, can be grounded if not in use)
19	AUX	Излез	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	-Внесување	Empty pin (not open for use, no need for user to care)
21	РЕСЕТИРАЈ	Влез	Module reset pin, low level reset.
22	ГНД	–	Заземјување на модулот
23	МРАВКА	–	Антенски интерфејс (излез на сигнал со висока фреквенција, карактеристична импеданса од 50 оми)
24	ГНД	–	Заземјување на модулот

Recommended Connectivity Charts

 

Детално функционира

 Fired at a fixed point

 

Broadcast emission

• Адреса на емитување
  • 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.
• Адреса за слушање
  • 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.
• Ресетирање на модулот
  • 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
  • AUX се користи за индикација на баферот на безжичниот трансивер и индикација за само-тестирање.
  • 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;

Индикација за пренос на радио

• 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; Внимание

бр	AUX Белешки
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.

Работен режим

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

Режим（0- 3)	M1	M0	Вовед во режим	Забелешка
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 Режим на заштеда на енергија	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 Режим на спиење

1

1

Module goes to sleep and can receive parameter setting commands

Cannot transmit in this mode

Mode switching precautions

бр	Забелешка
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	За прample, 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; За прample, 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)

Тип

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

предавател

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;
приемник	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.

WOR режим (режим 1)

Тип	When M0 = 1 and M1 = 0, the module operates in mode 1
предавател	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.
приемник	Еквивалентно на режимот 0.

Режим за заштеда на енергија (режим 2)

Тип	When M0 = 0 and M1 = 1, the module operates in mode 2
предавател	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.
приемник	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.

Режим на длабок сон (режим 3)

Тип	When M0 = 1 and M1 = 1, the module operates in mode 3
предавател	Cannot transmit wireless data.
приемник	Не може да прима безжични податоци.
конфигурација	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.
забелешка	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

Вовед во команда
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):

бр	Формат на команди	Објаснување
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	објаснување
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

објаснување

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

Ресетирај команда

command format	објаснување
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

	Име	Опис				Забелешка
0	ГЛАВА	Поправени 0xC0 или 0xC2, што покажува дека овие податоци за рамката се контролна команда				Мора да биде 0xC0 или C2 C0: The set parameters are saved by power- down. C2: The set parameters will not be saved by power-down.
1	ADDH	Висок бајт на адреса на модулот (стандардно 00H)				00H-FFH
2	Додај	Низок бајт за адреса на модулот (стандарден 00H)				00H-FFH
3	БРЗИНА	7	6	Бит за паритет на сериска порта		Serial port modes can be different on both sides of the communication
		0	0	8N1 (стандардно)
		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	Стапката на бауд на сериската порта е 1200
		0	0	1	Стапката на бауд на сериската порта е 2400
		0	1	0	Стапката на бауд на сериската порта е 4800
		0	1	1	Стапката на бауд на сериската порта е 9600 (стандардно)
		1	0	0	Стапката на бауд на сериската порта е 19200
		1	0	1	Стапката на бауд на сериската порта е 38400
		1	1	0	Стапката на бауд на сериската порта е 57600
		1	1	1	Стапката на бауд на сериската порта е 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	ЧАН	General Model
		7	6	5	Retain unused	Напиши 0

		канал за комуникација									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	ОПТИО Н.	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	Режим на транспарентно пренесување
		1	Fixed-point transmission mode
		6	Режим на погон на IO (стандарден 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	500 ms
		0	1		0	750 ms
		0	1		1	1000 ms
		1	0		0	1250 ms
		1	0		1	1500 ms
		1	1		0	1750 ms
		1	1		1	2000 ms
		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)						Надворешното напојување мора да обезбеди 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		20 dBm (стандардно)
		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
Застапеност				Serial port parity bit 8N1			Serial port baud rate of 9600					Air rate of 2.4k
Соодветно хексадецимално				1					A

Фабрички стандарден параметар

Број на модел

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

Модел на модул	фреквенција	Адреса	канал	воздушна брзина	бауд	Serial Port Format	преносна моќност
EWM32M- 433T20S	433.125MH z	0x0000	0x17	2.4 kbps	9600	8N1	20 dbm
EWM32M- 900T20S	868.125MH z	0x0000	0x12	2.4 kbps	9600	8N1	20 dbm

AT команда

• 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

Командна инструкција	Опис	Example	ExampОпис
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	Влезете во режимот за надградба на IAP
AT+RESET	Рестартирање на уредот	AT+RESET	Рестартирајте го уредот
ПО + РАЗВОЈ	Configuration parameters are restored to default and the device reboots	ПО + РАЗВОЈ	Configuration      parameters are restored to default

Команда за поставување	Опис	Example	ExampОпис
AT+UART=бауд,паритет	Setting the Baud Rate and Контролна сума	AT+UART=3,0	Set baud rate to 9600, 8N1
AT+RATE=стапка	Setting the Air Rate	ПО+СТАПКА=7	Поставете ја брзината на воздухот на 19.2K
AT+WOR=улога	Set WOR role and period	AT+WOR=0	Set to WOR receive
AT+POWER=моќ	Set Transmit Power	AT+POWER=0	Поставете ја моќноста на преносот на 30 dBm
AT+TRANS=режим	Setting the Transmit Mode	AT+TRANS=1	Set to fixed point mode

AT+LBT=lbt	Setting the Listen Before Прекинувач за разговор	AT+LBT=1	Set on, refer to section 7.5 LBT enable for details.
AT+ADDR=addr	Setting the Module Address	AT+ADDR=1234	Поставете ја адресата на модулот на 1234
AT+CHANNEL=канал	Sets the module operating канал	НА+КАНАЛ=23	Поставете ја фреквенцијата на 433.125 M
AT+NETID=netid	Поставување на ID на мрежата	AT+NETID=2	Поставете го ID на мрежата на 2
AT+KEY=клуч	Поставете го копчето за модул	AT+KEY=1234	Set module key to 1234
НА+ОДЛОЖУВАЊЕ=одложување	Setting the WOR delayed време за спиење	НА+ОДЛОЖУВАЊЕ=1000	Set WOR delayed sleep time to 1000 мил.
AT+SWITCH=прекинувач	Setting         the        software switching mode switch	AT+SWITCH=1	Setting on and allowing software префрлување
AT+SWITCH=прекинувач	Setting         the        software switching mode switch	AT+SWITCH=1	Set on in configuration mode to allow software switching.
AT+MODE=режим	Switching Operating Mode	AT+MODE=0	Switch to pass-through mode

Команда за барање	Опис	Врати се ексample	ExampОпис
НА+ ПОМОШ=?	Query AT Command Table		Return  to AT  Command Табела
AT+DEVTYPE=?	Query       Module       Model Број	DEVTYPE=EWM32M- 433T20S	Return to Module Model Број
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
ПО+СТАПКА=?	Query Air Rate	ПО+СТАПКА=7	Returns the air rate as 19.2K
AT+WOR=?	Query WOR Role	AT+WOR=0	Return to WOR receive
НА+МОЌ=?	Query Transmit Power	AT+POWER=0	Return to transmit power 20dBm
AT+TRANS=?	Query Transmit Mode	AT+TRANS=1	Вратете се во режим на фиксна точка
AT+LBT=?	Query Listen Before Talk функционален прекинувач	AT+LBT=1	Return to LBT switching статус
AT+ADDR=?	Query Module Address	AT+ADDR=1234	Return module address is 1234
НА+КАНАЛ=?	Query  Module  Operating Канал	НА+КАНАЛ=23	Returns the frequency as 433.125 М
AT+NETID=?	Query Network ID	AT+NETID=2	Returns the network ID as 2
AT+KEY=?	Query Module Key		Returns ERR
НА+ОДЛОЖУВАЊЕ=?	Побарајте WOR одложен сон време	НА+ОДЛОЖУВАЊЕ=1000	Returns WOR delayed sleep time of 1000ms.
AT+SWITCH=?	Query software switch mode прекинувач	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”.

Команден параметар	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 (слушајте пред разговор)	0:исклучено 1:вклучено
Addr（Module Address）	Адреса на модулот 0~65535 (децимална)
Channel（module channel）	Канал на модулот 0~45 (децимална)
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: Режим на спиење

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:

• Мрежна адреса: 0~65535
• Фреквентен канал: 0-45
• Мрежен ID: 0-255
• Клуч: 0~65535

Дизајн на хардвер

• 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;
• Ве молиме проверете го напојувањето за да се уверите дека е помеѓу препорачаната јачина на напојувањетоtages, if it exceeds themaximum value it may cause permanent damage to the module;
• Ве молиме проверете ја стабилноста на напојувањето, томtagд не треба да флуктуира значително и често;
• 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;
• Модулот треба да биде што е можно подалеку од напојувањето, трансформаторите, високофреквентните порамнувања и другите електромагнетни пречки во поголемиот дел;
• 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.

Заеднички проблеми

Незадоволително растојание на пренос

• 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;
• Метални предмети во близина на антената или сместени во метална обвивка, слабеењето на сигналот ќе биде многу сериозно;
• Wrong power register setting, air rate setting is too high (the higher the air rate, the closer the distance);
• Низок волуменtage 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

• Ве молиме проверете го напојувањето за да се уверите дека е помеѓу препорачаната јачина на напојувањетоtages, if it exceeds the maximum value it will cause permanent damage to the module;
• Ве молиме проверете ја стабилноста на напојувањето, томtage can not be substantial frequent fluctuations;
• Please ensure that the installation and use process anti-static operation, high-frequency device electrostatic sensitivity;
• Ве молиме проверете дали инсталацијата и употребата на процесот на влажност не треба да бидат премногу високи, дел од компонентите за уреди чувствителни на влажност;
• 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.

Избор на антена

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

Инструкции за заварување

Температура на преточување

Reflow Profile Карактеристики		Водено процесно склопување	Процесно склопување без олово
Предзагревање/Држење	најниска температура (Тсмин)	100 ℃	150 ℃
	највисока температура （Tsmax）	150 ℃	200 ℃
	Време (Tsmin~Tsmin)	60-120с	60-120с
наклон на пораст на температурата (TL~Tp)		3℃/s，max	3℃/s，Max
температура во течна фаза (TL)		183 ℃	217 ℃
Време на одржување над TL		60-90-ти	60-90-ти
Врвна температура на пакувањето 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” етикета.
Time (Tp) within 5°C of the specified classification temperature (Tc), see the следната слика		20s	30s
Наклон за ладење (Tp~TL)		6℃/s，Max	6℃/s，Max
Време од собна температура до максимум температура		6 минути, макс.	8 минути, макс.
※ Толеранција на максималната температура (Tp) на температурата проfile се дефинира како горна граница на корисникот.

Температура на преточување

Поврзани модели

Модел на производ	Carrier frequenc т.е Hz	пренос сија моќ dBm	Тест Растојание km	Воздушна брзина bps	Пакет форма	Производ Големина mm	Форма на антена
E32-170T30D	170 М	30	8	0.3к-9.6к	DIP	24*43 г	СМА-К
E32-433T20DC	433 М	20	3	0.3к-19.2к	DIP	21*36 г	СМА-К
E32-433T20S1	433 М	20	3	0.3к-19.2к	SMD	17*25.5 г	Stamp Дупки
E32- 433T20S2T	433 М	20	3	0.3к-19.2к	SMD	17*30 г	IPEX/Свamp Дупки
E32-400T20S	433/470 M	20	3	0.3к-19.2к	SMD	16*26 г	IPEX/Свamp Дупки
E32-433T30D	433 М	30	8	0.3к-19.2к	DIP	24*43 г	СМА-К
E32-433T30S	433 М	30	8	0.3к-19.2к	SMD	25*40.3 г	IPEX/Свamp Дупки
E32-868T20D	868 М	20	3	0.3к-19.2к	DIP	21*36 г	СМА-К
E32-868T20S	868 М	20	3	0.3к-19.2к	SMD	16*26 г	IPEX/Свamp Дупки
E32-868T30D	868 М	30	8	0.3к-19.2к	DIP	24*43 г	СМА-К
E32-868T30S	868 М	30	8	0.3к-19.2к	SMD	25*40.3 г	IPEX/Свamp Дупки
E32-915T20D	915 М	20	3	0.3к-19.2к	DIP	21*36 г	СМА-К
E32-915T20S	915 М	20	3	0.3к-19.2к	SMD	16*26 г	IPEX/Свamp Дупки
E32-915T30D	915 М	30	8	0.3к-19.2к	DIP	24*43 г	СМА-К
E32-915T30S	915 М	30	8	0.3к-19.2к	SMD	25*40.3 г	IPEX/Свamp Дупки

Водич за антена

Препорака за антена
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.

Модел на производ	стил	фреквенција опсег Hz	Интерфејс	Добивка dBi	Heightm m	Внесувач cm	Функционални карактеристики
TX433-JZ-5	Лепак стап Антени	433 М	СМА-Ј	2.0	52	–	Ultra Short Straight, Omni- Антена за насочување
TX433-JZG-6	Лепак стап Антена	433 М	СМА-Ј	2.5	62	–	Омни-дирекционална антена
TX433-JW-5	Rubber Stick Антена	433 М	СМА-Ј	2.0	50	–	Bent Rubber Stick, Omni- Directional Antenna
TX433-JWG-7	Rubber Stick Антена	433 М	СМА-Ј	2.5	75	–	Bent Rubber Stick, Omni Antenna
TX433-JK-11	Rubber Stick Антена	433 М	СМА-Ј	2.5	110	–	Bendable Rubber Stick, Omni- directional Antenna
TX433-XPL-100	Вшмукување чаша Антена	433 М	СМА-Ј	3.5	185	100	Small Suction Cup Antenna, Cost Ефективни
TX433-XP-200	Вшмукување чаша Антена	433 М	СМА-Ј	4.0	190	200	Neutral Suction Cup Antenna, Ниска загуба
TX433-XPH-300	Вшмукување чаша Антена	433 М	СМА-Ј	6.0	965	300	Large Suction Cup Antenna, High Добивка
TX490-JZ-5	Rubber Stick Антена	470/490 М	СМА-Ј	2.0	50	–	Ultra Short Straight, Omni- directional Antenna
TX490-XPL-100	Вшмукување чаша Антена	470/490 М	СМА-Ј	3.5	120	100	Small Suction Cup Antenna, Cost Ефективни

Batch packing method

Историја на ревизии

Верзија	Датум	Опис	Издадено од
1.0	2025-01-23	Почетна верзија	Lei
1.1	2025-02-07	Recommended Wiring Diagram to Add Reserved Pull-Up Resistor Description	Lei

За нас

• Техничка поддршка: support@cdebyte.com
• Линк за преземање документи и поставки за RF: www.cdebyte.com
• Ви благодариме што ги користите производите на Ebyte! Ве молиме контактирајте не со какви било прашања или предлози: info@cdebyte.com
• Телефон: +86 028-61399028
• Web: www.cdebyte.com
• Адреса: B5 Mold Park, 199# Xiqu Ave, High-Tech District, Сечуан, Кина

Авторски права ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd.

Документи / ресурси

EBYTE EWM32M-xxxT20S AT Directive 20dBm Small Form Factor LoRa Wireless Module [pdf] Упатство за користење 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

Референци

• Упатство за употреба