EBYTE EWM32M-xxxT20S AT Directive 20dBm Leutik Faktor Bentuk LoRa Modul Nirkabel Manual Pamaké

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Bubuka

Bubuka singket
EWM32M-xxxT20S runtuyan (UART) mangrupakeun ukuran ultra-leutik, low-ongkos modul serial nirkabel (UART), sarta E32 sapinuhna cocog sareng interoperability tina téhnologi komunikasi LORA, kakuatan ngirimkeun na 20dBm, kalawan rupa-rupa modeu transmisi, digawé di 433-band jeung 900-band, IVTL volitable kaluaran jeung tingkat kaluaran 3.3.tage.
EWM32M-xxxT20S gaduh advantagjarak komunikasi anu langkung panjang, kamampuan anti gangguan anu kuat, sareng karahasiaan anu kuat. Laju hawa standar pabrik nyaéta 2.4kbps, sareng kakuatan ngirimkeun nyaéta 20dBm, anu ningkatkeun stabilitas komunikasi sareng ngalegaan jarak komunikasi; dua modul dina gambar di handap boga kakuatan anu sarua sarta pita frékuénsi béda.

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;
Ngarojong catu daya 2.7 ~ 5.5V, sareng catu daya naon waé anu langkung ageung tibatan 5V tiasa mastikeun kinerja anu pangsaéna;

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

Alarm kaamanan imah sareng entri keyless jauh;
Imah pinter ogé sénsor industri sareng seueur deui;
Sistem kaamanan alarem nirkabel;
Solusi automation wangunan;
Wireless industrial grade remote controls;
Produk kasehatan;
Advanced Meter Reading Architecture (AMI).

Spésifikasi

Parameter RF

RF paraméter	hijian	Pagelaran			Nyarios
RF paraméter	hijian	Minimal nilai	has nilai	maksimal nilai-nilai	Nyarios
maksimal Ngirimkeun Daya	dBm	–	20	–	–
Narima Sensitipitas	dBm	123	124	125	Laju hawa 2.4kbps
Jarak Rujukan	M	–	5K	–	Clear and open, antenna gain 5dBi, antenna height 2.5 meters, air rate 2.4 kbps.
Pita frékuénsi operasi	MHz	410	433	441	Lumaku pikeun EWM32M-433T20S.
Pita frékuénsi operasi	MHz	862	900	930	Lumaku pikeun EWM32M-900T20S.
Laju hawa	bps	2.4K	2.4K	19.2K	Pamaké kontrol programmable
Ngahalangan kakuatan	dBm	–	-10	–	Less probability of burnout in close proximity

Parameter listrik

Parameter listrik		UNI T	nomer modél		Nyarios
Parameter listrik		UNI T	EWM32M- 433T20S	EWM32M- 900T20S	Nyarios
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	Résiko kaduruk-in maké 5V TTL
power consump tion	ngirimkeun Ayeuna	mA	110	Transient power consumption @22dBm	Konsumsi kakuatan sakedapan @22dBm
	Nampi Ayeuna	mA	8
	Saré Ayeuna	uA	3	Pareum software	Pareum software
suhu operasi		℃	-40～+85		Industrial Grade Design

Parameter hardware

Parameter hardware	Model Nnumber		Nyarios
	EWM32M-433T20S	EWM32M-900T20S
Modulasi modus	LoRa		New generation of LoRa modulation technology
Modeu panganteur	1.27 mm stamp liang
Komunikasi ion Interface	port serial UART		Tingkat TTL
Panjang ngirimkeun	58 Bty		kapasitas maksimum hiji tunggal package, automatically divided into packages after exceeding it
Bungkusan	SMD		–
Cache Kapasitas	512Btye		–
anteneu	IPEX-1/Stamp Liang		Equivalent impedance approx. 50Ω

Panganteur
Diménsi	14 * 20 mm	± 0.2 mm
Beurat bersih	2.0g	± 0.1g

Dimensi mékanis jeung Harti Pin

EWM32M-433/900T20S Mechanical Dimensions and Pin Definitions

Pin teu	Ngaran	Pin Pitunjuk	Pamakéan Pin
1	GND	–	Modul Tanah
2	NC	–	Empty pin (not open for use, no need for user concern)
3	GND	–	Modul Tanah
4	GND	–	Modul Tanah
5	TX_EN	Kaluaran	Used in conjunction with RX_EN to control external PA; left blank if not used

6	RX_EN	Kaluaran	Dipaké ditéang jeung TX_EN ngadalikeun pa éksternal; ditinggalkeun kosong lamun teu dipaké
7	CLK	Input / Kaluaran	SWCLK Clock pin for program loading (dangling, no need to be disambungkeun ku pamaké)
8	DIO	Input / Kaluaran	SWDIO Data pin for program loading (dangling, no need to be disambungkeun ku pamaké)
9	NC	–	Suku kosong (teu kabuka pikeun dianggo, henteu kedah diurus ku pangguna)
10	NC	–	Suku kosong (henteu dibuka pikeun dianggo, pangguna henteu kedah paduli)
11	NC	–	Suku kosong (henteu dibuka pikeun dianggo, pangguna henteu kedah paduli)
12	NC	–	Suku kosong (teu kabuka pikeun dianggo, pangguna henteu kedah paduli)
13	GND	–	Modul Tanah
14	VCC	–	Rujukan positip kakuatan modul, voltage rentang: 2.7 ka 5.5V DC
15	TXD	OUTPUT	TTL kaluaran serial, disambungkeun ka kaluaran RXD pin éksternal;
16	RXD	Input	input serial TTL, disambungkeun ka pin kaluaran TXD éksternal;
17	M1	Input	input serial TTL, disambungkeun ka pin kaluaran TXD éksternal; jeung M0, determines the module’s four operating modes (can not be suspended, if not used can be grounded)
18	M0	Input	Dina sambungan kalawan M1, nangtukeun 4 modus operasi pikeun modul (teu dangling, bisa grounded lamun teu dipaké)
19	AUX	Kaluaran	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 inisialisasi; (bisa ditunda)
20	NC	- Input	Pin kosong (henteu dibuka kanggo dianggo, henteu kedah diurus ku pangguna)
21	RESET	Input	Pin reset modul, tingkat reset low.
22	GND	–	Modul taneuh
23	SIreum	–	Antarbeungeut anteneu (kaluaran sinyal frékuénsi luhur, impedansi karakteristik 50 ohm)
24	GND	–	Modul Tanah

Recommended Connectivity Charts

Fungsi sacara 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 ngupingkeun
- 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
- Saatos modul diaktipkeun, AUX bakal langsung kaluaran tingkat anu rendah, sareng ngalaksanakeun uji diri hardware, ogé nyetél mode kerja dumasar kana parameter pangguna; Salila prosés ieu, AUX bakal tetep tingkat low, sarta lamun réngsé, AUX bakal kaluaran tingkat tinggi, tur mimitian dianggo normal nurutkeun mode gawé digabungkeun ku M1 na M0; Ku alatan éta, pamaké kudu ngadagoan tepi rising of AUX salaku titik awal operasi normal tina modul.

AUX in detail
- AUX dianggo pikeun indikasi panyangga transceiver nirkabel sareng indikasi uji diri.
- 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
- dipaké pikeun hudang MCU éksternal dina 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

ngan nalika ngareset sareng kaluar tina mode hibernasi; Awas

No	Catetan 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 sagala kaayaan tingkat low teu puas, AUX kaluaran tingkat tinggi.
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 kaluaran tingkat tinggi dina 1ms, bakal ngalengkepan karya switching 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; Upami AUX tetep luhur, maka peralihan mode bakal langsung dianggo.
4	modul nu resets parameter pamaké lamun pamaké asup tina mode 3 (mode sare) atawa salila reset a, salila kaluaran AUX mana 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.

Modeu operasi

modul ngabogaan opat modus operasi, nu diatur ku pin M1 jeung M0; rinci ditémbongkeun dina tabel di handap ieu:

Modus(0- 3）	M1	M0	Modél bubuka	Nyarios
0 Modeu Umum	0	0	Serial open, wireless open, transparent transmission	Panarima kudu mode 0, 1
1 Modeu hudang	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 tiasa mode 0 Receiver tiasa mode 1 Receiver tiasa mode 2
2 Modeu 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.	Pamancar kedah dina modeu 1

3 Modeu sare

Module goes to sleep and can receive parameter setting commands

Cannot transmit in this mode

Mode switching precautions

No	Nyarios
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	Pikeun 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; Pikeun 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)

Tipe

Nalika M0 = 0 sareng M1 = 0, modul beroperasi dina modeu 0

pamancar

Modul nampi data pangguna tina port serial, modul ngirimkeun pakét data nirkabel panjangna 58 bait, nalika jumlah input data ku pangguna ngahontal 58 bait, modul bakal ngamimitian transmisi nirkabel, dina waktos ayeuna, pangguna tiasa teraskeun input data anu kedah dikirimkeun; nalika pangguna kedah ngirimkeun bait kirang ti 58 bait, modul ngantosan 3 bait waktos, upami teu aya data pangguna teraskeun input, éta dianggap terminasi data, dina waktos ayeuna, modul bakal sadayana pakét data.

ngaliwatan nirkabel dikirim; nalika modul narima data pamaké munggaran, bakal AUX kaluaran tingkat low, nalika modul nu nyimpen sakabeh data kana chip RF tur mimitian ngirimkeun, AUX kaluaran tingkat tinggi;

panarima

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.

Modeu WOR (mode 1)

Tipe	Nalika M0 = 1 sareng M1 = 0, modul beroperasi dina modeu 1
pamancar	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.
panarima	Sarua jeung mode 0.

Modeu hemat daya (mode 2)

Tipe

Nalika M0 = 0 sareng M1 = 1, modul beroperasi dina modeu 2

pamancar

Modulna aya dina kaayaan hibernasi, port serial ditutup sareng teu tiasa nampi data serial ti MCU éksternal, janten mode ieu henteu ngagaduhan fungsi ngirimkeun nirkabel.

panarima

Dina Mode 2, pamancar diwajibkeun dianggo dina Modeu 1; ngadangukeun kode hudang-up dina interval nu sarua, sakali kode hudang-up valid narima, modul bakal terus dina kaayaan narima sarta ngadagoan sakabeh pakét valid pikeun nampa; lajeng AUX kaluaran tingkat low, sarta sanggeus reureuh 5ms, éta muka port serial sarta ngirimkeun kaluar data nirkabel narima ngaliwatan TXD, sarta sanggeus éta, kaluaran tingkat tinggi ti AUX; modul terus asup kana kaayaan operasi "saré - ngadangukeun" (polling); ku netepkeun waktos hudang-up anu béda, modul gaduh telat réspon panarima anu béda (maksimum 2 detik) sareng konsumsi kakuatan rata-rata (minimum 30u Modul nirkabel terus asup kana kaayaan kerja "ngadangukeun sare" (polling); ku netepkeun waktos hudang anu béda, modul gaduh telat réspon panarimaan anu béda (dugi ka 2s) sareng konsumsi daya rata-rata (dugi ka 2 detik) sareng konsumsi kakuatan rata-rata (sakurang-kurangna 30u); konsumsi.

Modeu sare jero (mode 3)

Tipe	Nalika M0 = 1 sareng M1 = 1, modul beroperasi dina modeu 3
pamancar	Cannot transmit wireless data.
panarima	Teu tiasa nampi data nirkabel.
konfigurasi	Modeu hibernasi bisa dipaké pikeun setting parameter modul, ngagunakeun port serial 9600, 8N1, pikeun ngeset parameter operasi modul ngaliwatan format paréntah husus.
Catetan	Nalika asup tina mode hibernasi ka modeu anu sanés, modul bakal ngonpigurasikeun parameter, sareng salami prosés konfigurasi, AUX tetep rendah; nalika rengse, outputs tingkat tinggi, jadi eta Dianjurkeun yén

Register read/write control

Paréntah Bubuka
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):

No	Format paréntah	Katerangan
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 tilu C1 dina format hexadecimal, modul nu mulih parameter disimpen, nu kudu dikirim terus.
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	Kirim tilu C3 dina format héksadesimal, modul mulih informasi versi, kudu dikirim terus.
5	C4 + C4 + C4	Kirim tilu C4 dina format hexadecimal, modul bakal ngahasilkeun reset, kudu dikirim terus.

Reading of operating parameters

command format	katerangan
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

katerangan

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 paréntah

command format

katerangan

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

	Ngaran	Katerangan				Nyarios
0	SIRAH	Maneuh 0xC0 atanapi 0xC2, nunjukkeun yén data pigura ieu paréntah kontrol				Kudu 0xC0 atanapi 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 bait tinggi (standar 00H)				00H-FFH
2	ADDL	Alamat modul low byte (standar 00H)				00H-FFH
3	SPED	7	6	bit parity port serial		Modeu port serial tiasa béda dina dua sisi komunikasi
		0	0	8N1 (standar)
		0	1	8O1
		1	0	8E1
		1	1	8N1 (00 equivalent)
		5	4	3	TTL serial port rate（bps）	Laju baud dua sisi tiasa béda Laju baud port serial henteu gumantung kana parameter transmisi nirkabel sareng henteu mangaruhan karakteristik transceiver nirkabel.
		0	0	0	Laju baud port serial nyaéta 1200
		0	0	1	Laju baud port serial nyaéta 2400
		0	1	0	Laju baud port serial nyaéta 4800
		0	1	1	Laju baud port serial nyaéta 9600 (standar)
		1	0	0	Laju baud port serial nyaéta 19200
		1	0	1	Laju baud port serial nyaéta 38400
		1	1	0	Laju baud port serial nyaéta 57600
		1	1	1	Laju baud port serial nyaéta 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	Modél Umum
4	CHAN	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	Modeu transmisi transparan
		1	Fixed-point transmission mode
		6	Modeu drive IO (standar 1)								bit ieu dipaké pikeun ngaktipkeun modul urang 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					Kadua modul transceiver dianggo dina modeu 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)						Catu daya éksternal kedah nyayogikeun 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 (Harti bait "SPED" dina nomer séri 3):
Bit binér tina bait ieu				7		6	5	4		3		2	1	0
Niley spésifik (bisa dikonfigurasi ku pamaké)				0		0	0	1		1		0	1	0
Répréséntasi				Serial port parity bit 8N1			Laju baud port serial 9600					Laju hawa 2.4k
Héksadesimal anu pakait				1					A

Parameter Default Pabrik

Nomer modél

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

Modél Modél	frékuénsi	Alamat	saluran	laju hawa	baud	Serial Port Format	kakuatan 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

paréntah AT

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

Command instruction	Katerangan	Example	Example Katerangan
AT+IAP (use with caution, see this article 8.3 Notes on Upgrading Firmware on Serial Ports for details)	Lebetkeun modeu pamutahiran IAP	AT+IAP	Lebetkeun modeu pamutahiran IAP
AT + RESET	Parangkat ngabalikan	AT + RESET	Reboot alat
AT + DEFAULT	Configuration parameters are restored to default and the device reboots	AT + DEFAULT	Configuration parameters are restored to default

Paréntah setelan	Katerangan	Example	Example Katerangan
AT+UART=baud,parity	Setting the Baud Rate and Checksum	AT+UART=3,0	Set baud rate to 9600, 8N1
AT + RATE = ongkos	Setting the Air Rate	AT+Rate=7	Setel laju hawa ka 19.2K
AT+WOR=peran	Set WOR role and period	AT+WOR=0	Set to WOR receive
AT + POWER = kakuatan	Set Transmit Power	AT+POWER=0	Setel kakuatan ngirimkeun ka 30dBm
AT + TRANS = modeu	Setting the Transmit Mode	AT+TRANS=1	Set to fixed point mode

AT+LBT=lbt	Setting the Listen Before Ngobrol saklar	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 ka 1234
AT + CHANNEL = saluran	Sets the module operating saluran	AT+SALURAN=23	Atur frékuénsi ka 433.125M
AT+NETID=netid	Nyetél ID Jaringan	AT+NETID=2	Setel ID jaringan ka 2
AT+KEY=konci	Setel konci modul	AT+KEY=1234	Set module key to 1234
AT + DELAY = reureuh	Setting the WOR delayed waktos sare	AT + DELAY = 1000	Set WOR delayed sleep time to 1000 ms.
AT + SWITCH = switch	Setting the software switching mode switch	AT+SWITCH=1	Setting on and allowing software switching
AT + SWITCH = switch	Setting the software switching mode switch	AT+SWITCH=1	Set on in configuration mode to allow software switching.
AT + MODE = modeu	Switching Operating Mode	AT+MODE=0	Switch to pass-through mode

paréntah query	Katerangan	Balikan example	Example Katerangan
AT+BANTUAN=?	Patarosan AT Paréntah Table		Return to AT Command Méja
AT+DEVTYPE=?	Query Module Model Jumlah	DEVTYPE=EWM32M- 433T20S	Return to Module Model Jumlah
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	Balik deui ka modeu titik tetep
AT+LBT=?	Query Listen Before Talk switch 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=?	Query Network ID	AT+NETID=2	Returns the network ID as 2
AT+KEY=?	Query Module Key		Returns ERR
AT + DELAY =?	Patarosan WOR reureuh sare waktos	AT + DELAY = 1000	Returns WOR delayed sleep time of 1000ms.
AT + SWITCH =?	Query software switch mode pindah	AT+SWITCH=0	Software switching mode off
AT+MODE=？	Query current working	AT+MODE=0	Ngabalikeun pass ayeuna-

modeu (sadayana modeu tiasa ditaroskeun)

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 paréntah	Signifikansi parameter
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 (ngadangukeun sateuacan ngobrol)	0: kaluar 1: on
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)
Modeu (mode operasi)	0: Modeu transmisi 1: Modeu hudang 2: Modeu hemat daya 3: Modeu sare

Serial Port Upgrade Firmware Notes
Lamun konsumén kudu ningkatkeun firmware nu, maranéhanana kudu manggihan nu pakait 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

Gambar di handap ieu nembongkeun panganteur tampilan luhur konfigurasi EWM32M-900T20S salaku example. Pamaké tiasa ngalih ka modeu paréntah ngalangkungan M0 sareng M1 pikeun konfigurasi gancang sareng maca parameter dina tampilan luhur.

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 frékuénsi: 0～45
ID jaringan: 0～255
Konci: 0～65535

Desain hardware

Disarankeun make catu daya diatur DC ngawasa modul ieu, faktor ripple catu daya kedah sakumaha leutik-gancang, sarta modul kudu reliably grounded;
Mangga nengetan sambungan bener tina terminal positif jeung negatif tina catu daya, kayaning sambungan sabalikna bisa ngabalukarkeun karuksakan permanén ka modul;
Mangga parios catu daya pikeun mastikeun yén éta antara vol suplai dianjurkeuntages, if it exceeds themaximum value it may cause permanent damage to the module;
Mangga parios stabilitas catu daya, voltage teu kudu turun naek sacara signifikan jeung sering;
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 kedah sajauh mungkin tina catu daya, trafo, alignment frekuensi tinggi sareng gangguan éléktromagnétik sanés dina bagian anu langkung ageung;
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 anu teu nyugemakeun

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;

objék logam deukeut anteneu, atawa disimpen dina cangkang logam, atenuasi sinyal bakal pisan serius;
Wrong power register setting, air rate setting is too high (the higher the air rate, the closer the distance);
Vol handaptage tina catu daya dina suhu kamar leuwih handap tina nilai dianjurkeun, nu handap 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 parios catu daya pikeun mastikeun yén éta antara vol suplai dianjurkeuntages, lamun ngaleuwihan nilai maksimum bakal ngabalukarkeun karuksakan permanén ka modul;
Mangga parios stabilitas catu daya, voltage can not be substantial frequent fluctuations;

Please ensure that the installation and use process anti-static operation, high-frequency device electrostatic sensitivity;
Punten pastikeun pamasangan sareng pamakean prosés kalembaban henteu kedah luhur teuing, bagian tina komponén alat anu sénsitip kalembaban;
If there is no special demand is not recommended to be used at too high or too low a temperature.

BER is too high

Deukeut gangguan sinyal frekuensi anu sami, jauh tina sumber gangguan atanapi modifikasi frekuensi sareng saluran pikeun ngahindarkeun 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 Antenna

Aktipkeun duanana panganteur IPEX-1 jeung stamp panganteur liang dina waktos anu sareng, panganteur IPEX-1 sarta Stamp panganteur liang bisa dipilih di will

parentah las

Suhu reflow

Reflow Profile Ciri		assembly prosés Leaded	Majelis prosés tanpa kalungguhan
Preheating / Nyepeng	suhu panghandapna （Tsmin）	100 ℃	150 ℃
	suhu pangluhurna （Tsmax）	150 ℃	200 ℃
	Waktos（Tsmin~Tsmin）	60-120s	60-120s
kemiringan naékna suhu（TL~Tp）		3℃/s，max	3℃/s，Max
suhu fase cair (TL)		183 ℃	217 ℃
Ngayakeun waktos luhureun TL		60~90s	60~90s
Suhu bungkusan 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” labél.
Time (Tp) within 5°C of the specified classification temperature (Tc), see the inohong handap		20s	30s
Kemiringan cooling (Tp~TL)		6℃/s，Max	6℃/s，Max
Waktos ti suhu kamar ka puncak suhu		6 menit, max.	8 menit, max.
※Toleransi suhu puncak (Tp) suhu profile diartikeun salaku wates luhur pamaké.

Suhu reflow

Modél Patali

Modél produk	Frékuénsi pamawa ies Hz	ngirimkeun sion kakuatan dBm	Tes Jarak km	Laju hawa bps	Bungkusan wujud	produk Ukuran mm	Bentuk anteneu
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 liang
E32- 433T20S2T	433M	20	3	0.3k～19.2k	SMD	17*30	IPEX / Stamp liang
E32-400T20S	433/470 M	20	3	0.3k～19.2k	SMD	16*26	IPEX / Stamp liang
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 liang
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 liang
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 liang
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 liang
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 liang

Panungtun anteneu

Rekomendasi anteneu
Anteneu mangrupa peran penting dina prosés komunikasi, mindeng kualitas goréng anteneu bakal boga dampak gede dina sistem komunikasi, jadi kami nyarankeun sababaraha anteneu salaku ngarojong modul nirkabel urang jeung kinerja anu leuwih alus teuing jeung anteneu harga lumrah.

Modél produk	gaya	frékuénsi pita Hz	Panganteur	Keuntungan dBi	Heightm m	Pakan cm	Fitur Fungsional
TX433-JZ-5	Lem Stick anteneu	433M	SMA-J	2.0	52	–	Lurus ultra pondok, omni- Antenna arah
TX433-JZG-6	Lem Stick anteneu	433M	SMA-J	2.5	62	–	Anteneu Omni-Directional
TX433-JW-5	Rubber Stick anteneu	433M	SMA-J	2.0	50	–	Bent Rubber Stick, Omni- Directional Antenna
TX433-JWG-7	Rubber Stick anteneu	433M	SMA-J	2.5	75	–	Bent Rubber Stick, Omni Antenna
TX433-JK-11	Rubber Stick anteneu	433M	SMA-J	2.5	110	–	Bendable Rubber Stick, Omni- directional Antenna
TX433-XPL-100	Cangkir nyeuseup anteneu	433M	SMA-J	3.5	185	100	Anteneu cangkir nyeuseup leutik, ongkos Éféktif
TX433-XP-200	Cangkir nyeuseup anteneu	433M	SMA-J	4.0	190	200	Antena Piala Suction Netral, Leungitna Low
TX433-XPH-300	Cangkir nyeuseup anteneu	433M	SMA-J	6.0	965	300	Anteneu Piala Nyeuseup ageung, Luhur Keuntungan
TX490-JZ-5	Rubber Stick anteneu	470/490M	SMA-J	2.0	50	–	Ultra Short Straight, Omni- directional Antenna
TX490-XPL-100	Cangkir nyeuseup anteneu	470/490M	SMA-J	3.5	120	100	Anteneu cangkir nyeuseup leutik, ongkos Éféktif

Batch packing method

Riwayat révisi

Vérsi	titimangsa	Katerangan	Dikaluarkeun ku
1.0	2025-01-23	Vérsi awal	Lei
1.1	2025-02-07	Recommended Wiring Diagram to Add Reserved Pull-Up Resistor Description	Lei

Tentang Kami

Bantosan Téknis: support@cdebyte.com
Dokumén sareng tautan unduh Setélan RF: www.cdebyte.com
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Dokumén / Sumberdaya

EBYTE EWM32M-xxxT20S AT Diréktif 20dBm Faktor Bentuk Leutik Modul Nirkabel LoRa [pdf] Manual pamaké
E32-170T30D, E32-433T20DC, E32-915T30D, E32-915T30S, EWM32M-xxxT20S AT diréktif 20dBm Leutik Faktor Bentuk LoRa Modul Nirkabel, EWM32M-xxxT20S, Lo AT Diréktif Nirkabel Bentuk Leutik FactorB FactorB Nirkabel Leutik Module, LoRa Wireless Module, Module

Rujukan

Manual pamaké

EBYTE EWM32M-xxxT20S AT Diréktif 20dBm Faktor Bentuk Leutik Modul Nirkabel LoRa

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