SNM401 Ad Hoc Network Module

1. Product Description

SNM401 Centerless Ad Hoc Network Module realizes centerless long-distance communication between modules, and adopts the world’s latest LDPC encoding and decoding technology, compared to the RS level used by traditional radio stations The concatenated convolutional code can have a coding gain of 5dB, and at the same time, through the “self-relay wireless communication” technology, it innovatively realizes automatic relay between modules, thereby greatly improving the coverage effect and transmission distance. SNM401 adopts ad-hoc network wireless communication technology, ib lub node tuaj yeem tau txais thiab ua haujlwm tib lub teeb liab xa los ntawm ntau lub nodes tib lub sijhawm, muab cov teeb liab xa los ntawm cov nodes sib txawv, demodulate cov ntaub ntawv qub kom loj tshaj qhov ua tau, thiab muaj qhov sib kis loj dua thiab muaj kev ntseeg siab dua. Lub wireless kev sib txuas lus thev naus laus zis ntawm ad hoc network tsis xav tau txoj kev, thiab ntau cov nodes txiav txim siab seb puas yuav pib xa mus raws li qhov tau txais cov teeb liab zoo thiab lub zog teb, thiab cov relay tau hloov kho los ntawm ntau lub hop ib-point relay mus rau ntau lub hop multi-point relay. Lub xeev relay yog upgraded rau ib tug mesh relay. Thaum twg cov node nyob rau hauv lub relay network yog disconnected los ntawm lub network, lwm relay kab nyob rau hauv lub relay network ua hauj lwm ib txwm kom cov relay nyhuv tsis cuam tshuam.

2. Khoom nta

◆ Ua haujlwm zaus: 400-500MHz

◆ Ib leeg-hop kis tau tus mob nrug: 3～ 5 Km

◆ Dynamic topology convergence: 1ms

◆ Xa lub zog: 1W

◆ Tau txais rhiab heev: -127dBm

◆ Ua haujlwm voltage: 3.5-4.5V

◆ Lub teeb liab rau lub suab nrov piv rau qhov pib: 1dB

◆Channel nrug: 12.5KHz

◆ Zaus stability: 1ppm ua

◆ Intermodulation: 65dB

◆ Encryption: 256AES

◆ Kev tiv thaiv kab mob tsis zoo: 75dB

◆ Kev xaiv channel uas nyob ib sab: [email protected]

◆ Ua haujlwm kub: -40～ +85 ℃

◆ Module loj: 33.542 x 3.4 mm

3. Daim ntawv thov

◆ Internet ntawm Yam ◆ Ib Tug Tub Rog System ◆ Kev Tshaj Tawm Xwm Ceev

◆UAV ◆Real-time Remote Control ◆ Digital Intercom

◆ Kev sib txuas lus xwm ceev ◆ Neeg hlau ◆ Wireless Data Transmission

4. Ua hauj lwm Parameters

Rooj 1: Kev khiav hauj lwm Parameters Table

parameter	Cov xwm txheej	Yam tsawg kawg nkaus	raug	Maximum	Unit
Kev khiav hauj lwm zaus Band		400		500	MHz
Kev khiav hauj lwm Kub		-40	25	+85	℃
Kev khiav hauj lwm Voltage		3.5	4	4.5	V
Kev xa hluav taws xob			30		dBm
Tau Txais Kev Txaus Siab		-130	-127	-125	dBm
Maximum RF input zog				+33	dBm
serial chaw nres nkoj baud tus nqi			115200		bps ua
pw tsaug zog tam sim no	@ IB = 0		40		uA
txais tam sim no			160		Ma
xa tam sim no tam sim no	@VCC==4V, 1W			1800	Ma
kis nruab nrab tam sim no	@VCC==4V, 1W		600		Ma
suab input voltage				1.5	VPP
audio output Impedance			150		ohm

Ceeb toom: Yog hais tias qhov kev ua hauj lwm ntawm lub module tshaj qhov saum toj no txwv qhov tseem ceeb, nws yuav ua rau muaj kev puas tsuaj mus tas li rau lub module.

5. Module pins thiab txhais

Daim duab 1 SNM 401 Pin Daim duab

Cov ntawv luv	hauj lwm
AI	Analog tswv yim
TO	Analog tso zis
AIO	Analog ob txoj kev
Los ntawm	Cov tswv yim digital
Ua	Digital tso zis
DIO	Digital bi-direction
P	hwj chim
G	Hauv av

Rooj 3 SNM401 pin definition

Pin NO	Pin npe	hom	hauj lwm
1	GND	G	GND
2	ntsaum	AIO	kav hlau txais xov chaw nres nkoj
3	GND	G	GND
4	GND	G	GND
5	VBAT	P	Sab nraud 3.5V-4.5V roj teeb lossis fais fab mov, 4V tau pom zoo
6	VBAT	P
7	GND	G	GND
8	GND	G	GND
9	TX_STATE	Ua	module transmit indication Signal, the high level is transmitting
10	RX_STATE	Ua	module receiving indication signal, the high level is receiving
11	NC		No connect
12	NC		No connect
13	GND	G	GND
14	TXD	Ua	serial port data transmitting pin
15	RXD	Los ntawm	serial port data receiving pin
16	SET	Los ntawm	module Serial port configuration signal, configure parameters when high level, send and receive data when low level
17	EN	Los ntawm	module open enable signal, high level open, low level close
18	GND	G	GND
19	PRO1	DIO	programmable definition pin
20	PRO2	DIO	programmable Definition pin

: The module is regulated by 3.3V LDO inside, thiab tag nrho cov IOs yog 3.3V qib.

 

6. Pob loj

Daim duab 2 SIB 401 daim duab loj

Daim duab 3 SIB 401 pob daim duab

7. LAYOUT precautions

1.covSIB 401 module ua haujlwm ntawm 400-500MHzthiab kev cuam tshuam ntawm ntau yam ntawm wireless transceivers yuav tsum raug zam.

2. Nws yog nteg nyob rau hauv lub module GND, thiab cov kab mob tau txuas mus rau qhov chaw ib puag ncig kom deb li deb tau.
3. Nws raug nquahu kom siv cov khoom siv insulating los cais cov module mounting txoj hauj lwm ntawm lub substrate, piv txwv li, muab ib qho tag nrho rau hauv txoj hauj lwm no

silkscreen

4. Sim coj ib txoj kab luv luv thiab tuab rau lub module, qhov pom zoo tooj liab kab dav yog80mil, thiab lub decoupling capacitor yuav tsum tau muab tso rau ze rau lub hwj chim tus pin li sai tau.

8. Software configuration

8.1 Parameter configuration

Cov neeg siv tuaj yeem tau txais thiab teeb tsa tsis tau los ntawm qhov chaw nres nkoj serial, lub serial chaw nres nkoj baud tus nqi yog 115200, cov ntaub ntawv me ntsis yog 8me ntsis, qhov nres me ntsis yog 1me ntsis, thiab tsis muaj parity me ntsis.

Rooj 4 Serial port packet format

Serial chaw nres nkoj rooj pob ntawv
cov lus qhia	ntev	Hais kom ua	kev qhia teb / teb cov ntsiab lus
1Byte	1Byte	1Byte	NByte

8.1.1 Cov lus qhia

Cov lus qhia yog kho raws li 0x68 ua.

8.1.2 Length

Length COFDM wireless kis tau tus mob system kis tus nqi suav lus txib + lus txib/teb cov ntsiab lus.

8.1.3 Hais kom ua

haum rau installation ntawm tag nrho cov qauv 5 Serial Command-Lus npe

muaj nuj nqi	Hais kom ua	Cov ntsiab lus	Teb Cov Ntsiab Lus
Tau txais RF Parameters	0x00 ua	tsis	zaus(4Byte) +hwj chim(1Byte) +configuration xwm txheej(1Byte) +Suab nrov(2Byte) +Baseband Version Number(1Byte)
Teem RF Parameter	0x01 ua	zaus(4Byte) +hwj chim(1Byte)	tsis
cov ntaub ntawv relay theem	0x0c ua	tsis	cov ntaub ntawv relay theem(1Byte)
Teem cov ntaub ntawv relay theem	0x 0 d	Cov ntaub ntawv relay theem(1Byte)	tsis
tus yuam sij kom tau	0x 0 e	tsis	tus yuam sij(32Byte)
teem tus yuam sij	0x0f ua	tus yuam sij(32Byte)	tsis muaj
tau module version	0x 12	tsis muaj	module npe + tus lej version
module npaj	0x55 ua	tsis muaj	tsis muaj
txuag configuration	0x66 ua	tsis muaj	tsis muaj
cov ntaub ntawv txais	0xA 2	tsis muaj	cov ntaub ntawv pob tshab (NByte)
cov ntaub ntawv xa	0xb 2	cov ntaub ntawv pob tshab (NByte)	tsis muaj

8.1.4 Instruction content/reply content

8.1.4.1 Tau txais RF parameter

zaus: Unit yog Hz, qhov chaw teeb tsa yog ~500000000, thiab qhov precision yog 500HHz.

hwj chim:1-siab zog 1W,0-qis zog 0.5W, lub neej ntawd yog lub zog siab 1W.

Configuration xwm txheej: Qhia txog xov tooj cua kev teeb tsa,0-tsis tsim nyog,1-kev teeb tsa,2-configured tiav.

Suab nrov pem teb: Qhia txog lub suab nrov nrov tam sim no, uas 2 muaj qab hau

Baseband version naj npawb: Lub sab sauv 4 me ntsis sawv cev tus naj npawb loj version, thiab qis 4 me ntsis sawv cev tus me version naj npawb.

Configuration Packet:0x68 0x 0

Rov qab pob ntawv:0x680x 0 Frequency Fais Fab Configuration Status Noise Floor Baseband Version No.

8.1.4.2 Kev teeb tsa RF Parameters

Tom qab teeb tsa RF tsis, koj yuav tsum tau tos kom tiav configuration (txog 2 vib nas this) ua ntej lub module tuaj yeem nkag mus rau qhov chaw ua haujlwm kom raug.

Configuration pob:0x68 0x 0 Lub zog zaus

rov qab pob:0x68 0x 0

8.1.4.3 Tau txais cov ntaub ntawv relay theem

SH ad hoc network technology yog ib txoj kev simulcast mesh relay, uas tsis xav tau routing, uas tuaj yeem txhim kho qhov coverage.number of relay hops N hais txog tus naj npawb ntawm hops uas tuaj yeem xa rov qab thaum cov ntaub ntawv xa mus, thiab qhov siab tshaj plaws ntawm relay hops yog 16. Nrog txhua qhov hop ntxiv, the transmission distance doubles, but the transmission time increases accordingly, as shown in the table below.

Rooj 6 Comparison of Relay Levels

Relay Hops	Transmission Bytes	Transmission Time
N	<36	N*50ms
N	37-72	N*100ms
N	73-108	N*150ms
N	109-144	*200ms
N	145-180	N*250ms
N	181-216	N*300ms
N	217-252	N*350ms
N	253-288	N*400ms

Configuration pob: 0x68 0x01 0x0C

Return package: 0x68 0x02 0x0C Data relay level

8.1.4.4 Teem cov ntaub ntawv relay theem

Configuration pob:0x68 0x02 0x0D Cov ntaub ntawv relay theem

return packet:0x68 0x01 0x0D

8.1.4.5 Obtain the key

key for communication encryption, the module will automatically discard the voice information and data information whose key is inconsistent with its own key, and the key is all 0.

Configuration Packet:0x68 0x 0

Rov qab pob ntawv:0x68 0x 0 Ntsiab

8.1.4.6 Teeb qhov tseem ceeb

Configuration Packet:0x680x21 0 Ntsiab

Rov qab pob ntawv:0x68 0x 0

8.1.4.7 Tau txais Module Version

Configuration Packet:0x68 0x 12

Rov qab pob ntawv:0x68 0x15 0x12 0x53 0x69 0x6d 0x75 0x6c 0x48 0x6f 0x63 0x32 0x31 0x38 0x5f 0x31 0x31 0x30 0x2e 0x30 0x00 yog“Simulhoc2618_V1.0.0”

8.1.4.8 module

Return package:0x68 0 x55

8.1.4.9 Txuag configuration

txib kom txuag txhua qhov chaw rau flash, thiab qhov kev cawmdim configuration yuav raug siv ncaj qha tom qab fais fab tuag.

Configuration pob:0x68 0x 0

Return package:0x68 0x 0

8.1.4.10 Kev txais cov ntaub ntawv

Thaum lub SET pin qis, lub module yuav pob tshab xa cov ntaub ntawv tau txais pob rau tus neeg siv. The length varies according to the actual transparent transmission data length.

Return package:0x68 ua Length 0xA 2 Transparent

8.1.4.11 Cov ntaub ntawv kis tau tus mob

Only when the SET pin is at a low level can data be transmitted, and the data sent in a single transmission does not exceed 36 bytes. The length varies according to the actual transparent transmission data length. If a return packet is received, it indicates that the data transmission failed this time.

Configuration pob: 0x68 Length 0xB2 Transparent data

rov qab pob: 0x68 0x01 0xB