EBYTE EWM32M-xxxT20S AT Directive 20dBm Small Form Factor LoRa Modul Nirkabel

Penafian

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Pambuka

Pambuka Brief
Seri EWM32M-xxxT20S (UART) minangka modul serial nirkabel (UART) ukuran Ultra-cilik, murah, lan E32 kompatibel karo interoperabilitas teknologi komunikasi LORA, daya ngirimake 20dBm, kanthi macem-macem mode transmisi, digunakake ing 433-band lan port 900-band, TVTL sing kompatibel karo output level 3.3.tage.
EWM32M-xxxT20S duwe advantagjarak komunikasi sing luwih dawa, kemampuan anti-interferensi sing kuat, lan rahasia sing kuwat. Tingkat udara standar pabrik yaiku 2.4kbps, lan daya ngirimake yaiku 20dBm, sing nambah stabilitas komunikasi lan ngluwihi jarak komunikasi; loro modul ing tokoh ing ngisor iki duwe daya padha lan band frekuensi beda.

 Fitur

• 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;
• Ndhukung sumber daya 2.7 ~ 5.5V, lan sumber daya sing luwih gedhe tinimbang 5V bisa njamin kinerja sing paling apik;
• Industrial-grade standard design, support -40 ~ +85 ℃ for long time use;
• Module power can be up to 100mW (20dBm), transmission farther and more stable.

Aplikasi

• Weker keamanan omah lan entri tanpa kunci remot;
• Omah sing cerdas uga sensor industri lan liya-liyane;
• sistem keamanan alarm nirkabel;
• Solusi otomatisasi bangunan;
• Wireless industrial grade remote controls;
• Produk kesehatan;
• Advanced Meter Reading Architecture (AMI).

Spesifikasi

Parameter RF 

RF paramèter	unit	Pagelaran			Cathetan
		minimal nilai	khas nilai	maksimal nilai-nilai
maksimal Ngirim Daya	dBm	–	20	–	–
nampa Sensitivitas	dBm	123	124	125	Rate udara 2.4kbps
Jarak Referensi	M	–	5K	–	Clear and open, antenna gain 5dBi, antenna height 2.5 meters, air rate 2.4kbps.
Pita frekuensi operasi	MHz	410	433	441	Ditrapake kanggo EWM32M-433T20S.
	MHz	862	900	930	Ditrapake kanggo EWM32M-900T20S.
Tarif Udara	bps	2.4K	2.4K	19.2K	Kontrol pangguna sing bisa diprogram
Pamblokiran daya	dBm	–	-10	–	Less probability of burnout in close proximity

Paramèter listrik

Paramèter listrik		UNI T	nomer model		Cathetan
			EWM32M- 433T20S	EWM32M- 900T20S
operasi 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.
tingkat komunikasi		V	3.3V	3.3V	Risiko burn-in nggunakake 5V TTL
power consump tion	Ngirim Saiki	mA	110	Transient power consumption @22dBm	Konsumsi daya cepet @22dBm
	Nampa Saiki	mA	8
	Saiki turu	uA	3	Mati piranti lunak	Mati piranti lunak
suhu operasi		℃	-40～+85		Industrial Grade Design

Parameter hardware

Parameter hardware	Model N		Cathetan
	EWM32M-433T20S	EWM32M-900T20S
Modulasi modus	Lora		New generation of LoRa modulation technology
Mode Antarmuka	1.27 mm Kabamp bolongan
Komunikasi ion Interface	port serial UART		Tataran TTL
Ngirim dawa	58 Bty		Kapasitas maksimal siji package, automatically divided into packages after exceeding it
Paket	SMD		–
Cache Kapasitas	512Btye		–
Antena	IPEX-1/Stamp bolongan		Equivalent impedance approx. 50Ω

Antarmuka
ukuran	14 * 20 mm	± 0.2 mm
Bobot Net	2.0g	± 0.1g

Dimensi Mekanik lan Definisi Pin

EWM32M-433/900T20S Mechanical Dimensions and Pin Definitions

Pin No	jeneng	Petunjuk Pin	Panggunaan Pin
1	GND	–	Modul Ground
2	NC	–	Empty pin (not open for use, no need for user concern)
3	GND	–	Modul Ground
4	GND	–	Modul Ground
5	TX_EN	Output	Used in conjunction with RX_EN to control external PA; left blank if not used

6	RX_EN	Output	Digunakake bebarengan karo TX_EN kanggo kontrol PA external; kiwa kosong yen ora digunakake
7	CLK	Input / Output	SWCLK Clock pin for program loading (dangling, no need to be disambungake dening pangguna)
8	DIO	Input / Output	SWDIO Data pin for program loading (dangling, no need to be disambungake dening pangguna)
9	NC	–	Sikil kosong (ora mbukak kanggo digunakake, ora perlu pangguna kanggo ngurus)
10	NC	–	Sikil kosong (ora mbukak kanggo digunakake, pangguna ora perlu peduli)
11	NC	–	Kaki kosong (ora mbukak kanggo digunakake, pangguna ora perlu peduli)
12	NC	–	Sikil kosong (ora mbukak kanggo digunakake, pangguna ora perlu peduli)
13	GND	–	Modul Ground
14	VCC	–	Referensi positif daya modul, voltage sawetara: 2.7 kanggo 5.5V DC
15	TXD	OUTPUT	Output serial TTL, disambungake menyang pin output RXD eksternal;
16	RXD	Input	input serial TTL, disambungake menyang pin output TXD external;
17	M1	Input	input serial TTL, disambungake menyang pin output TXD external; lan M0, determines the module’s four operating modes (can not be suspended, if not used can be grounded)
18	M0	Input	Magepokan karo M1, nemtokake 4 mode operasi kanggo modul (ora dangling, bisa grounded yen ora dienggo)
19	AUX	Output	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; (bisa suspend)
20	NC	- Input	Pin kosong (ora mbukak kanggo digunakake, ora perlu kanggo pangguna kanggo ngurus)
21	RESET	Input	Pin reset modul, reset tingkat rendah.
22	GND	–	Modul lemah
23	SEmut	–	Antarmuka antena (output sinyal frekuensi dhuwur, impedansi karakteristik 50 ohm)
24	GND	–	Modul Ground

Recommended Connectivity Charts

 

Fungsi kanthi rinci

 Fired at a fixed point

 

Broadcast emission

• Alamat siaran
  • 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.
• Alamat ngrungokake
  • 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.
• Reset modul
  • Sawise modul diuripake, AUX bakal langsung ngasilake tingkat sing kurang, lan nindakake tes mandiri hardware, uga nyetel mode kerja miturut paramèter pangguna; Sajrone proses iki, AUX bakal tetep tingkat kurang, lan nalika rampung, AUX bakal output tingkat dhuwur, lan wiwit bisa normal miturut mode apa digabungake dening M1 lan M0; Mulane, pangguna kudu ngenteni pinggiran munggah AUX minangka titik wiwitan operasi normal modul.
• AUX in detail
  • AUX digunakake kanggo indikasi buffer transceiver nirkabel lan indikasi self-test.
  • 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
  • digunakake kanggo tangi MCU eksternal ing hibernasi;

Indikasi transmisi 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

mung nalika ngreset lan metu saka mode hibernasi; Ati-ati

Ora	Cathetan 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; Nalika kabeh kahanan tingkat kurang puas, AUX output tingkat dhuwur.
2	When AUX outputs low level, it indicates that the module is busy, and no working mode detection will be performed at this time; Nalika modul AUX output tingkat dhuwur ing 1ms, bakal ngrampungake karya ngoper mode.
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; Yen AUX tetep dhuwur, banjur ngalih mode bakal langsung ditrapake.
4	Modul ngreset paramèter pangguna nalika pangguna mlebu saka mode 3 (mode turu) utawa sajrone reset, sajrone output AUX dadi kurang.
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.

Mode operasi

Modul wis papat mode operasi, kang disetel dening lencana M1 lan M0; rincian ditampilake ing tabel ing ngisor iki:

Mode(0- 3）	M1	M0	Pambuka Mode	Cathetan
0 Mode Umum	0	0	Serial open, wireless open, transparent transmission	Panrima kudu mode 0, 1
1 Mode tangi	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 bisa mode 0 Receiver bisa mode 1 Receiver bisa mode 2
2 Mode hemat daya	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.	Pemancar kudu ing mode 1

3 Mode turu

1

1

Module goes to sleep and can receive parameter setting commands

Cannot transmit in this mode

Mode switching precautions

Ora	Cathetan
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	Kanggo example, 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; Kanggo example, 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)

Jinis

Nalika M0 = 0 lan M1 = 0, modul beroperasi ing mode 0

pemancar

Modul nampa data pangguna saka port serial, modul ngirimake paket data nirkabel dawane 58 bait, nalika jumlah input data dening pangguna tekan 58 bait, modul bakal miwiti transmisi nirkabel, ing wektu iki, pangguna bisa terus input data sing kudu ditularaké; nalika pangguna kudu ngirim bita kurang saka 58 bita, modul ngenteni 3 bita wektu, yen ora ana data pangguna terus input, iku dianggep mandap data, ing wektu iki, modul bakal kabeh paket data.

	liwat nirkabel dikirim; nalika modul nampa data pangguna pisanan, bakal AUX output tingkat kurang, nalika modul nempatno kabeh data menyang chip RF lan wiwit ngirimaken, AUX output tingkat dhuwur;
panrima	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.

Mode WOR (mode 1)

Jinis	Nalika M0 = 1 lan M1 = 0, modul beroperasi ing mode 1
pemancar	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.
panrima	Setara karo mode 0.

Mode hemat daya (mode 2)

Jinis	Nalika M0 = 0 lan M1 = 1, modul beroperasi ing mode 2
pemancar	Modul kasebut ana ing negara hibernasi, port serial ditutup lan ora bisa nampa data serial saka MCU eksternal, mula mode iki ora duwe fungsi transmisi nirkabel.
panrima	Ing Mode 2, pemancar dibutuhake kanggo bisa ing Mode 1; ngrungokake kode tangi ing interval biasa, sawise kode tangi bener ditampa, modul bakal terus ing negara nampa lan ngenteni kabeh paket bener ditampa; banjur AUX ngasilake tingkat sing kurang, lan sawise wektu tundha 5ms, mbukak port serial lan ngirim data nirkabel sing ditampa liwat TXD, lan sawise iku, ngasilake tingkat dhuwur saka AUX; modul terus ngetik "turu - ngrungokake" negara operasi (polling); kanthi nyetel wektu tangi sing beda-beda, modul duwe wektu tundha nanggepi sing beda-beda (maksimum 2s) lan konsumsi daya rata-rata (minimal 30u Modul nirkabel terus mlebu ing kahanan kerja "ngrungokake turu" (polling); kanthi nyetel wektu tangi sing beda, modul kasebut duwe wektu tundha nanggepi resepsi sing beda (nganti 2s) lan konsumsi daya rata-rata (nganti wektu tundha rata-rata); konsumsi.

Mode turu jero (mode 3)

Jinis	Nalika M0 = 1 lan M1 = 1, modul beroperasi ing mode 3
pemancar	Cannot transmit wireless data.
panrima	Ora bisa nampa data nirkabel.
konfigurasi	Mode hibernasi bisa digunakake kanggo setelan parameter modul, nggunakake port serial 9600, 8N1, kanggo nyetel paramèter operasi modul liwat format printah tartamtu.
cathetan	Nalika ngetik saka mode hibernasi menyang mode liyane, modul bakal ngonfigurasi ulang paramèter, lan sajrone proses konfigurasi, AUX tetep kurang; nalika rampung, output tingkat dhuwur, supaya dianjurake sing

Register read/write control

Pambuka Command
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):

Ora	Format printah	Panjelasan
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	Ngirim telung C1 ing format heksadesimal, modul ngasilake paramèter sing disimpen, sing kudu dikirim terus-terusan.
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	Kirimi telung C3 ing format heksadesimal, modul ngasilake informasi versi, kudu dikirim terus.
5	C4 + C4 + C4	Kirimi telung C4 ing format heksadesimal, modul bakal generate reset, kudu dikirim terus-terusan.

Reading of operating parameters

command format	panjelasan
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

panjelasan

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

Reset printah

command format	panjelasan
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

	jeneng	Katrangan				Cathetan
0	KEPALA	Ndandani 0xC0 utawa 0xC2, nuduhake yen data pigura iki minangka perintah kontrol				Kudu 0xC0 utawa C2 C0: The set parameters are saved by power- down. C2: The set parameters will not be saved by power-down.
1	ADDH	Alamat modul byte dhuwur (standar 00H)				00H-FFH
2	ADDL	Alamat modul byte sithik (standar 00H)				00H-FFH
3	SPED	7	6	bit paritas port serial		Mode port serial bisa beda-beda ing loro-lorone komunikasi
		0	0	8N1 (standar)
		0	1	8O1
		1	0	8E1
		1	1	8N1 (00 equivalent)
		5	4	3	TTL serial port rate（bps）	Tingkat baud saka loro-lorone bisa beda Tingkat baud port serial ora gumantung saka paramèter transmisi nirkabel lan ora mengaruhi karakteristik transceiver nirkabel.
		0	0	0	Tingkat baud port serial yaiku 1200
		0	0	1	Tingkat baud port serial yaiku 2400
		0	1	0	Tingkat baud port serial yaiku 4800
		0	1	1	Tingkat baud port serial yaiku 9600 (standar)
		1	0	0	Tingkat baud port serial yaiku 19200
		1	0	1	Tingkat baud port serial yaiku 38400
		1	1	0	Tingkat baud port serial yaiku 57600
		1	1	1	Tingkat baud port serial yaiku 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	Model Umum
		7	6	5	Retain unused	Tulis 0

		saluran komunikasi									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	PILIHAN 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	Mode transmisi transparan
		1	Fixed-point transmission mode
		6	Mode drive IO (standar 1)								Bit iki digunakake kanggo ngaktifake modul kang 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					Loro-lorone modul transceiver bisa digunakake ing 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)						Sumber daya eksternal kudu nyedhiyakake 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 (standar)
		0	1		17dBm
		1	0		14dBm
		1	1		10dBm
Example (Tegese byte "SPED" ing nomer seri 3):
Biner bit saka byte iki				7		6	5	4		3		2	1	0
Nilai spesifik (bisa dikonfigurasi pangguna)				0		0	0	1		1		0	1	0
Perwakilan				Serial port parity bit 8N1			Serial port baud rate 9600					Rate udara 2.4k
Heksadesimal sing cocog				1					A

Parameter Default Pabrik

Nomer model

Nilai parameter standar pabrik: C0 00 09 00 00 00 1A 00 17 03 00 00

Model Modul	frekuensi	alamat	saluran	kacepetan udara	baud	Serial Port Format	daya transmisi
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 printah

• 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

instruksi printah	Katrangan	Example	Example Katrangan
AT+IAP (use with caution, see this article 8.3 Notes on Upgrading Firmware on Serial Ports for details)	Mlebet mode upgrade IAP	AT+IAP	Ketik mode upgrade IAP
AT + RESET	Urip maneh piranti	AT + RESET	Urip maneh piranti
AT + DEFAULT	Configuration parameters are restored to default and the device reboots	AT + DEFAULT	Configuration      parameters are restored to default

printah persiyapan	Katrangan	Example	Example Katrangan
AT+UART=baud,paritas	Setting the Baud Rate and Checksum	AT+UART=3,0	Set baud rate to 9600, 8N1
AT + RATE = tarif	Setting the Air Rate	AT+RATE=7	Setel tingkat udara dadi 19.2K
AT+WOR=peran	Set WOR role and period	AT+WOR=0	Set to WOR receive
AT + POWER = daya	Set Transmit Power	AT+POWER=0	Setel daya ngirim menyang 30dBm
AT+TRANS=mode	Setting the Transmit Mode	AT+TRANS=1	Set to fixed point mode

AT+LBT=lbt	Setting the Listen Before Ngalih wicara	AT+LBT=1	Set on, refer to section 7.5 LBT enable for details.
AT+ADDR=addr	Setting the Module Address	AT+ADDR=1234	Setel alamat modul menyang 1234
AT+CHANNEL=saluran	Sets the module operating saluran	AT+SALURAN=23	Setel frekuensi kanggo 433.125M
AT+NETID=netid	Nyetel ID Jaringan	AT+NETID=2	Setel ID jaringan dadi 2
AT+KEY=key	Setel tombol modul	AT+KEY=1234	Set module key to 1234
AT + DELAY = tundha	Setting the WOR delayed wayahe turu	AT+DELAY=1000	Set WOR delayed sleep time to 1000 ms.
AT + SWITCH = ngalih	Setting         the        software ngalih mode	AT+SWITCH=1	Setting on and allowing software ngoper
AT + SWITCH = ngalih	Setting         the        software ngalih mode	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

Prentah pitakon	Katrangan	Balikan mantanample	Example Katrangan
AT + HELP =?	Pitakon AT Command Tabel		Return  to AT  Command Tabel
AT+DEVTYPE=?	Query       Module       Model Nomer	DEVTYPE=EWM32M- 433T20S	Return to Module Model Nomer
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	Bali menyang mode titik tetep
AT+LBT=?	Query Listen Before Talk ngalih fungsi	AT+LBT=1	Return to LBT switching status
AT+ADDR=?	Query Module Address	AT+ADDR=1234	Return module address is 1234
AT+SALURAN=?	Query  Module  Operating Saluran	AT+SALURAN=23	Returns the frequency as 433.125M
AT+NETID=?	ID Jaringan Pitakonan	AT+NETID=2	Returns the network ID as 2
AT+KEY=?	Kunci Modul Query		Returns ERR
AT+DELAY=?	Pitakon WOR tundha turu wektu	AT+DELAY=1000	Returns WOR delayed sleep time of 1000ms.
AT+SWITCH=?	Query software switch mode ngalih	AT+SWITCH=0	Software switching mode off
AT+MODE=?	Query      current      working	AT+MODE=0	Ngasilake pass saiki-

mode (kabeh mode bisa ditakoni)

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”.

Parameter printah	Parameter pinunjul
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 (ngrungokake sadurunge ngomong)	0: uwal 1: ing
Addr（Module Address）	Alamat modul 0~65535 (desimal)
Channel（module channel）	Saluran modul 0~45 (desimal)
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 (mode operasi)	0: Mode transmisi 1: Mode tangi 2: Mode hemat daya 3: Mode turu

Serial Port Upgrade Firmware Notes
Yen pelanggan kudu nganyarke perangkat kukuh, padha kudu golek BIN cocog 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

Tokoh ing ngisor iki nuduhake konfigurasi antarmuka tampilan ndhuwur EWM32M-900T20S minangka Example. Pangguna bisa ngalih menyang mode printah liwat M0 lan M1 kanggo konfigurasi cepet lan maca paramèter ing tampilan ndhuwur.

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:

• Alamat jaringan: 0～65535
• Saluran frekuensi: 0 ~ 45
• ID Jaringan: 0～255
• Kunci: 0～65535

Desain hardware

• Disaranake nggunakake sumber daya DC diatur kanggo daya modul iki, faktor ripple sumber daya kudu dadi cilik sabisa, lan modul kudu andal lemah;
• Mangga mbayar manungsa waé kanggo sambungan bener saka terminal positif lan negatif saka sumber daya, kayata sambungan mbalikke bisa nimbulaké karusakan permanen kanggo modul;
• Mangga dipriksa sumber daya kanggo mesthekake yen iku antarane vol sumber dianjuraketages, if it exceeds themaximum value it may cause permanent damage to the module;
• Mangga dipriksa stabilitas sumber daya, voltage ora kena fluktuasi sacara signifikan lan kerep;
• 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;
• Modul kudu adoh saka sumber daya, trafo, alignment frekuensi dhuwur lan gangguan elektromagnetik liyane ing bagean sing luwih gedhe;
• 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.

Masalah umum

Jarak transmisi sing ora nyenengake

• 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;
• Objek logam cedhak antena, utawa diselehake ing cangkang logam, atenuasi sinyal bakal serius banget;
• Wrong power register setting, air rate setting is too high (the higher the air rate, the closer the distance);
• Low Voltage saka sumber daya ing suhu kamar luwih murah tinimbang nilai dianjurake, ing ngisor 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

• Mangga dipriksa sumber daya kanggo mesthekake yen iku antarane vol sumber dianjuraketages, yen ngluwihi nilai maksimum bakal nimbulaké karusakan permanen kanggo modul;
• Mangga dipriksa stabilitas sumber daya, voltage can not be substantial frequent fluctuations;
• Please ensure that the installation and use process anti-static operation, high-frequency device electrostatic sensitivity;
• Mangga mesthekake yen instalasi lan nggunakake proses asor ngirim ora dhuwur banget, bagéan saka komponen kanggo asor-sensitif piranti;
• If there is no special demand is not recommended to be used at too high or too low a temperature.

BER is too high

• Cedhak gangguan sinyal frekuensi sing padha, adoh saka sumber gangguan utawa ngowahi frekuensi lan saluran supaya ora ana gangguan;
• 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.

Pilihan Antena

Aktifake loro antarmuka IPEX-1 lan stamp antarmuka bolongan ing wektu sing padha, antarmuka IPEX-1 lan stamp antarmuka bolongan bisa milih ing bakal

instruksi Welding

Suhu reflow

Reflow Pro Kabfile Karakteristik		Proses perakitan sing dipimpin	Proses perakitan tanpa timbal
Preheating / Nyekel	suhu paling murah (Tsmin)	100 ℃	150 ℃
	suhu paling dhuwur （Tsmax）	150 ℃	200 ℃
	Wektu（Tsmin~Tsmin）	60-120s	60-120s
kemiringan kenaikan suhu (TL~Tp)		3℃/s，max	3℃/s，Max
suhu fase cair (TL)		183 ℃	217 ℃
Nyekel wektu ndhuwur TL		60~90s	60~90s
Suhu paket puncak 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 tokoh ing ngisor iki		20s	30s
Kemiringan pendinginan (Tp~TL)		6℃/s，Max	6℃/s，Max
Wektu saka suhu kamar nganti puncak suhu		6 menit, maksimal.	8 menit, maksimal.
※ Toleransi suhu puncak (Tp) saka suhu profile ditetepake minangka watesan ndhuwur pangguna.

Suhu reflow

Model sing gegandhengan

Model produk	Frekuensi pembawa ies Hz	ngirim sion daya dBm	Tes kadohan km	Kacepetan udara bps	Paket wujud	produk Ukuran mm	Wangun 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 bolongan
E32- 433T20S2T	433M	20	3	0.3k~19.2k	SMD	17*30	IPEX/Stamp bolongan
E32-400T20S	433/470 M	20	3	0.3k~19.2k	SMD	16*26	IPEX/Stamp bolongan
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 bolongan
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 bolongan
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 bolongan
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 bolongan
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 bolongan

Pandhuan Antena

Rekomendasi Antena
Antena peran penting ing proses komunikasi, asring kualitas antena miskin bakal duwe impact gedhe ing sistem komunikasi, supaya disaranake sawetara antena minangka ndhukung modul nirkabel kita lan kinerja luwih apik banget lan rega cukup antena.

Model produk	gaya	frekuensi pita Hz	Antarmuka	gain dBi	Heightm m	Feeder cm	Fitur Fungsional
TX433-JZ-5	Lem Stick Antena	433M	SMA-J	2.0	52	–	Lurus Ultra Singkat, Omni- Antena Pitunjuk
TX433-JZG-6	Lem Stick Antena	433M	SMA-J	2.5	62	–	Antena Omni-Directional
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	Suction Cup Antena	433M	SMA-J	3.5	185	100	Antena Cup Suction Cilik, Biaya Efektif
TX433-XP-200	Suction Cup Antena	433M	SMA-J	4.0	190	200	Antena Piala Suction Netral, Mundhut Low
TX433-XPH-300	Suction Cup Antena	433M	SMA-J	6.0	965	300	Antena Piala Suction Gedhe, Dhuwur gain
TX490-JZ-5	Rubber Stick Antena	470/490M	SMA-J	2.0	50	–	Ultra Short Straight, Omni- directional Antenna
TX490-XPL-100	Suction Cup Antena	470/490M	SMA-J	3.5	120	100	Antena Cup Suction Cilik, Biaya Efektif

Batch packing method

Riwayat revisi

Versi	Tanggal	Katrangan	Ditanggepi dening
1.0	2025-01-23	Versi wiwitan	Lei
1.1	2025-02-07	Recommended Wiring Diagram to Add Reserved Pull-Up Resistor Description	Lei

Babagan kita

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Dokumen / Sumber Daya

EBYTE EWM32M-xxxT20S AT Directive 20dBm Small Form Factor LoRa Modul Nirkabel [pdf] Manual pangguna E32-170T30D, E32-433T20DC, E32-915T30D, E32-915T30S, EWM32M-xxxT20S AT Directive 20dBm Small Form Factor LoRa Modul Nirkabel, EWM32M-xxxT20S, Lo AT Directive Formulir Nirkabel Cilik FactorB LoRa Modul, LoRa Wireless Module, Modul

Referensi

• Manual pangguna