Wiki source code of Instruction for LA66 Peer to Peer firmware

Last modified by Bei Jinggeng on 2022/12/19 11:05

version	line-number	content
7.5	1	(% class="wikigeneratedid" %)
	2	Table of Contents:
1.1	3
7.5	4	{{toc/}}
7.4	5
7.5	6
	7
	8	= 1. Overview =
	9
	10
1.1	11	This instruction is for how to use Peer to Peer firmware in LA66.
	12
	13
	14
7.5	15	= 2. Firmware Location =
7.4	16
7.5	17
1.1	18	Click[[ here>>https://www.dropbox.com/sh/dq03kkfdrqnhy66/AACpHIcKYMa4o1IySKtVoeENa?dl=0]] to download the firmware and update it to LA66 according to the instruction for different boards.
	19
	20
7.5	21
7.4	22	= 3. How to use? =
2.1	23
	24
7.5	25	== 3.1 AT command ==
7.2	26
	27
7.4	28	(% style="color:blue" %)1). Lora parameter configuration:
7.2	29
	30
7.4	31	AT+FRE: Get or Set TX and RX frequency
7.2	32
7.4	33	AT+BW: Get or Set TX and RX BandWidth
7.2	34
7.4	35	AT+SF: Get or Set TX and RX Spreading Factor
7.2	36
7.4	37	AT+POWER: Get or Set Tx Power Range
7.2	38
7.4	39	AT+CRC: Get or Set TX and RX CRC Type
7.2	40
7.4	41	AT+HEADER: Get or Set TX and RX Header Type
7.2	42
7.4	43	AT+CR: Get or Set TX and RX Header Type
7.2	44
7.16	45	AT+IQ: Get or Set TX and RX InvertIQ
7.2	46
7.4	47	AT+PREAMBLE: Get or Set TX and RX Preamble Length
7.2	48
7.4	49	AT+SYNCWORD: Get or Set sync word
7.2	50
	51
	52
7.4	53	(% style="color:blue" %)2). General configuration:
7.2	54
	55
7.4	56	ATZ: Trig a reset of the MCU
7.2	57
7.4	58	AT+FDR: Reset Parameters to Factory Default
7.2	59
7.4	60	AT+CFG: Print all configurations
7.2	61
7.4	62	AT+FCU: Get or Set the Frame Counter Uplink
7.2	63
7.4	64	AT+FCD: Get or Set the Frame Counter Downlink
7.2	65
7.4	66	AT+GROUPMOD: Get or Set TX and RX group
7.2	67
7.4	68	AT+RXMOD: Get or Set Rx Timeout and Reply mode
7.2	69
7.4	70	AT+SEND: Send text data or hex along with the application port and confirm status
7.2	71
7.4	72	AT+RECV: Print last receive message, RSSI and SNR
7.2	73
	74
	75
7.4	76	== 3.2 Serial port information ==
	77
	78
	79	(% style="color:blue" %)1). Information initialized at reset：
	80
7.2	81	[[image:image-20220926112125-1.png]]
	82
	83
7.4	84	(% style="color:blue" %)2). In retransmission, the Uplinkcounter does not accumulate. The following figure shows that the third count packet is retransmitted twice when the ACK packet is not received.
7.2	85
	86
	87	[[image:image-20220926112125-2.png]]
	88
	89
7.4	90	(% style="color:blue" %)3). In the figure below, the receiver sends an ACK to the sender after receiving the packet, and the sender stops retransmission after receiving the ACK.
7.2	91
	92
7.3	93	(% style="color:red" %)Receiver: (configured as AT+RXMOD=65535,2)
7.2	94
	95	[[image:image-20220926112125-3.png]]
	96
	97
	98
7.3	99	(% style="color:red" %)Sender:
7.2	100
	101	[[image:image-20220926112125-4.png]]
	102
	103
	104
7.5	105	== 3.3 Data Format ==
7.2	106
	107
8.1	108	1 byte of TXGROUPMOD +n payload
7.2	109
	110
	111	Payload(S12, SF11, SF10 maximum length is 59, SF9 maximum length is 123, SF8, SF7 maximum length is 230):
	112
	113	(% border="1" style="background-color:#ffffcc; color:green; width:316px" %)
7.16	114	\|=(% style="width: 105px;" %)Size (bytes)\|=(% style="width: 109px;" %) 1\|=(% style="width: 99px;" %)payloadsize
7.2	115	\|(% style="width:105px" %)Value\|(% style="width:109px" %)TXGroupmod\|(% style="width:99px" %)Send data
	116
7.16	117
	118
7.5	119	= 4. AT Command Set =
7.2	120
2.1	121
7.4	122	== 4.1 Set TX and RX Bandwidth ==
2.1	123
3.1	124
7.15	125	Set TX and RX BandWidth (0 ~~ 9), (% style="color:blue" %)AT Command : AT+BW(%%)
3.1	126
7.15	127	0: 125 kHz
3.1	128
7.4	129	1: 250 kHz
7.15	130
7.4	131	2: 500 kHz
7.15	132
7.4	133	3: 62.5 kHz
7.15	134
7.4	135	4: 41.67 kHz
7.15	136
7.4	137	5: 31.25 kHz
7.15	138
7.4	139	6: 20.83 kHz
7.15	140
7.4	141	7: 15.63 kHz
7.15	142
7.4	143	8: 10.42 kHz
3.1	144
7.15	145	9: 7.81 kHz
3.1	146
7.15	147
7.4	148	(% style="color:red" %)Default Value: AT+BW=0,0 (%%) ~/~/ BandWidth: 125kHz ,125kHz
	149
	150	(% style="color:red" %)Range: (0 ~~ 9)
	151
	152
7.6	153
	154	== 4.2 Set TX and RX frequency ==
	155
	156
7.15	157	Set TX and RX frequency (MHz), (% style="color:blue" %)AT Command : AT+FRE(%%)
7.6	158
7.15	159
7.6	160	(% style="color:red" %)Default Value: AT+FRE=868.100,868.100 (%%) ~/~/ Frequency: 868.100MHz, 868.100MHz
	161
	162
	163
	164	== 4.3 Set TX and RX Spreading Factor ==
	165
	166
7.15	167	Set TX and RX Spreading Factor ( 5 ~~ 12), (% style="color:blue" %)AT Command : AT+SF(%%)
7.6	168
7.15	169
7.6	170	(% style="color:red" %)Default Value: AT+SF=12,12 (%%) ~/~/ Spreading Factor : 12,12
	171
	172	(% style="color:red" %)Range: (5 ~~ 12)
	173
	174
7.15	175
7.6	176	== 4.4 Set Tx Power Range ==
	177
7.7	178
7.15	179	Set Tx Power Range( 0 ~~ 22 dBm), (% style="color:blue" %)AT Command : AT+POWER(%%)
7.6	180
7.15	181
7.7	182	(% style="color:red" %)Default Value: AT+POWER=20 (%%) ~/~/ Output Power: 20dBm
7.6	183
7.7	184	(% style="color:red" %)Range: (0 ~~ 22)
7.6	185
	186
7.8	187
7.7	188	== 4.5 Set TX and RX Coding Rate ==
7.6	189
	190
7.15	191	Set TX and RX Coding Rate ( 1 ~~ 4 ), (% style="color:blue" %)AT Command ：AT+CR(%%)
7.6	192
7.7	193	1: 4/5
7.15	194
7.7	195	2: 4/6
7.15	196
7.7	197	3: 4/7
7.15	198
7.7	199	4: 4/8
7.6	200
7.15	201
7.7	202	(% style="color:red" %)Default Value: AT+CR=1,1 (%%) ~/~/ Coding Rate: 4/5, 4/5
7.6	203
7.7	204	(% style="color:red" %)Range: (1 ~~ 4)
7.6	205
	206
	207
7.8	208	== 4.6 Set TX and RX Header Type ==
7.6	209
	210
7.15	211	Set TX and RX Header Type ( 0,1 ), (% style="color:blue" %)AT Command : AT+HEADER(%%)
7.6	212
7.8	213	0: Variable length packet (explicit header)
7.15	214
7.8	215	1: Fixed length packet (implicit header)
7.6	216
7.15	217
7.8	218	(% style="color:red" %)Default Value: AT+HEADER=1,1 (%%) ~/~/ Header Type: explicit, explicit
7.6	219
7.8	220	(% style="color:red" %)Range: (0 ~~ 1)
7.6	221
	222
	223
7.9	224	== 4.7 Set TX and RX CRC Type ==
7.6	225
	226
7.15	227	Set TX and RX CRC Type ( 0,1) ,(% style="color:blue" %)AT Command：AT+CRC(%%)
	228
7.9	229	0: CRC OFF
7.15	230
7.9	231	1: CRC ON
7.6	232
7.15	233
7.9	234	(% style="color:red" %)Default Value: AT+CRC=0,0 (%%) ~/~/ CRC: OFF, OFF
7.6	235
7.9	236	(% style="color:red" %)Range: (0 ~~ 1)
7.6	237
	238
	239
7.10	240	== 4.8 Set TX and RX InvertIQ ==
7.6	241
	242
7.15	243	Set TX and RX InvertIQ ( 0,1) , (% style="color:blue" %)AT Command：AT+IQ(%%)
	244
7.9	245	0: Standard IQ setup
7.15	246
7.9	247	1: Inverted IQ setup
7.7	248
7.15	249
7.9	250	(% style="color:red" %)Default Value: AT+IQ=0,0 (%%) ~/~/ Invert IQ: 0,0
7.7	251
7.9	252	(% style="color:red" %)Range: (0 ~~ 1)
7.7	253
	254
	255
7.11	256	== 4.9 Set TX and RX Preamble Length ==
7.7	257
7.8	258
7.15	259	Set TX and RX Preamble Length ( 0 ~~ 65535 ) , (% style="color:blue" %)AT Command： AT+PREAMBLE(%%)
7.8	260
7.15	261
7.11	262	(% style="color:red" %)Default Value: AT+PREAMBLE=8,8 (%%) ~/~/ Preamble: 8,8
7.8	263
7.11	264	(% style="color:red" %)Range: ( 0 ~~ 65535 )
7.9	265
	266
7.12	267
7.11	268	== 4.10 Set Syncword ==
7.9	269
	270
7.15	271	Set Syncword(0: private，1: public), (% style="color:blue" %)AT Command : AT+SYNCWORD(%%)
7.9	272
7.15	273
7.11	274	(% style="color:red" %)Default Value: AT+SYNCWORD=0 (%%) ~/~/ 0x3444 for Public Network
7.9	275
7.11	276	(% style="color:red" %)Range: ( 0 ~~ 1 )
7.9	277
	278
7.11	279
7.12	280	== 4.11 Set TX and RX group ==
7.11	281
	282
7.15	283	Set TX and RX group. (0 ~~ 255)，(% style="color:blue" %)AT Command：AT+GROUPMOD(%%)
7.11	284
7.15	285	Group > 0: Device only accept same group transmision
7.11	286
7.15	287	Group = 0: Accept Any group
7.12	288
7.15	289
	290	(% style="color:red" %)Default Value: AT+GROUPMOD=0,0 (%%) ~/~/ Group: 0,0
	291
7.12	292	(% style="color:red" %)Range: ( 0 ~~ 255 )
	293
	294
7.13	295
	296
	297	== 4.12 Set Rx Timeout and Reply mode ==
	298
	299
7.15	300	Set Rx Timeout and Reply mode, Parameter 1, Parameter2， (% style="color:blue" %)AT Command：AT+RXMOD(%%)
7.13	301
7.15	302	Parameter 1:
7.13	303
7.15	304	0: Always no RX
7.13	305
7.15	306	1 ~~ 65534: Open RX window and last for specify seconds.
	307
	308	65535: RX window always open.
	309
	310
	311	~ Parameter 2:
	312
	313	0: No ACK
	314
	315	1: Send an ACK once got a message from another device. ACK Content is same as receive message
	316
	317	2: Send an ACK once got a message from another device. ACK Content is 0x00 FF
	318
	319
7.13	320	(% style="color:red" %)Default Value: AT+RXMOD=65535,2 (%%) ~/~/ RX Mode: 65535, 2
	321
	322
	323
	324	== 4.13 Send Message ==
	325
	326
7.15	327	Send Message， (% style="color:blue" %)AT Command：AT+SEND(%%)
	328
	329	Parameter 1: send hex or text
	330
7.13	331	0: Send hex
7.15	332
7.13	333	1: Send text
	334
	335
7.15	336	Parameter 2: Content
	337
	338
	339	Parameter 3 : ACK Type
	340
7.13	341	0: No ACK
7.15	342
7.13	343	1: Wait for ACK (Same as what we sent)
7.15	344
7.13	345	2: Wait for ACK ( 0x00 FF)
	346
	347
7.15	348	Parameter 4 : Retransmission ( 0 ~~ 8 )
	349
7.13	350	0: No re-transmission
7.15	351
7.13	352	1 ~~ 8: total sends 1~~8 transmission, interval 5 seconds
	353
	354
7.15	355	Example: AT+SEND=1,hello world,0,3
7.13	356
7.15	357	(% style="color:red" %)Notice: RX reply (Defined by AT+RXMOD) won't ask for TX ACK
7.14	358
7.15	359
	360
7.14	361	== 4.14 Print last receive message with RSSI and SNR ==
	362
	363
7.15	364	Print last receive message with RSSI and SNR，(% style="color:blue" %)AT+Command：AT+RECV(%%)
	365
7.14	366	0: Print in Hex
7.15	367
7.14	368	1: Print in text
	369
	370
7.15	371	Example: AT+RECV=0
	372	\\The recevied message will be clear after this command.
7.14	373
	374
	375
	376
	377
	378
	379
7.15	380
	381
7.13	382

Wiki source code of Instruction for LA66 Peer to Peer firmware

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