Wiki source code of Instruction for LA66 Peer to Peer firmware

Version 7.16 by Xiaoling on 2022/09/26 14:49

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]]
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	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
	108	1 byte of TXGROUPMOD +n payload + 4 bytes of checksum
	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
	119
7.5	120	= 4. AT Command Set =
7.2	121
2.1	122
7.4	123	== 4.1 Set TX and RX Bandwidth ==
2.1	124
3.1	125
7.15	126	Set TX and RX BandWidth (0 ~~ 9), (% style="color:blue" %)AT Command : AT+BW(%%)
3.1	127
7.15	128	0: 125 kHz
3.1	129
7.4	130	1: 250 kHz
7.15	131
7.4	132	2: 500 kHz
7.15	133
7.4	134	3: 62.5 kHz
7.15	135
7.4	136	4: 41.67 kHz
7.15	137
7.4	138	5: 31.25 kHz
7.15	139
7.4	140	6: 20.83 kHz
7.15	141
7.4	142	7: 15.63 kHz
7.15	143
7.4	144	8: 10.42 kHz
3.1	145
7.15	146	9: 7.81 kHz
3.1	147
7.15	148
7.4	149	(% style="color:red" %)Default Value: AT+BW=0,0 (%%) ~/~/ BandWidth: 125kHz ,125kHz
	150
	151	(% style="color:red" %)Range: (0 ~~ 9)
	152
	153
7.6	154
	155	== 4.2 Set TX and RX frequency ==
	156
	157
7.15	158	Set TX and RX frequency (MHz), (% style="color:blue" %)AT Command : AT+FRE(%%)
7.6	159
7.15	160
7.6	161	(% style="color:red" %)Default Value: AT+FRE=868.100,868.100 (%%) ~/~/ Frequency: 868.100MHz, 868.100MHz
	162
	163
	164
	165	== 4.3 Set TX and RX Spreading Factor ==
	166
	167
7.15	168	Set TX and RX Spreading Factor ( 5 ~~ 12), (% style="color:blue" %)AT Command : AT+SF(%%)
7.6	169
7.15	170
7.6	171	(% style="color:red" %)Default Value: AT+SF=12,12 (%%) ~/~/ Spreading Factor : 12,12
	172
	173	(% style="color:red" %)Range: (5 ~~ 12)
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	175
7.15	176
7.6	177	== 4.4 Set Tx Power Range ==
	178
7.7	179
7.15	180	Set Tx Power Range( 0 ~~ 22 dBm), (% style="color:blue" %)AT Command : AT+POWER(%%)
7.6	181
7.15	182
7.7	183	(% style="color:red" %)Default Value: AT+POWER=20 (%%) ~/~/ Output Power: 20dBm
7.6	184
7.7	185	(% style="color:red" %)Range: (0 ~~ 22)
7.6	186
	187
7.8	188
7.7	189	== 4.5 Set TX and RX Coding Rate ==
7.6	190
	191
7.15	192	Set TX and RX Coding Rate ( 1 ~~ 4 ), (% style="color:blue" %)AT Command ：AT+CR(%%)
7.6	193
7.7	194	1: 4/5
7.15	195
7.7	196	2: 4/6
7.15	197
7.7	198	3: 4/7
7.15	199
7.7	200	4: 4/8
7.6	201
7.15	202
7.7	203	(% style="color:red" %)Default Value: AT+CR=1,1 (%%) ~/~/ Coding Rate: 4/5, 4/5
7.6	204
7.7	205	(% style="color:red" %)Range: (1 ~~ 4)
7.6	206
	207
	208
7.8	209	== 4.6 Set TX and RX Header Type ==
7.6	210
	211
7.15	212	Set TX and RX Header Type ( 0,1 ), (% style="color:blue" %)AT Command : AT+HEADER(%%)
7.6	213
7.8	214	0: Variable length packet (explicit header)
7.15	215
7.8	216	1: Fixed length packet (implicit header)
7.6	217
7.15	218
7.8	219	(% style="color:red" %)Default Value: AT+HEADER=1,1 (%%) ~/~/ Header Type: explicit, explicit
7.6	220
7.8	221	(% style="color:red" %)Range: (0 ~~ 1)
7.6	222
	223
	224
7.9	225	== 4.7 Set TX and RX CRC Type ==
7.6	226
	227
7.15	228	Set TX and RX CRC Type ( 0,1) ,(% style="color:blue" %)AT Command：AT+CRC(%%)
	229
7.9	230	0: CRC OFF
7.15	231
7.9	232	1: CRC ON
7.6	233
7.15	234
7.9	235	(% style="color:red" %)Default Value: AT+CRC=0,0 (%%) ~/~/ CRC: OFF, OFF
7.6	236
7.9	237	(% style="color:red" %)Range: (0 ~~ 1)
7.6	238
	239
	240
7.10	241	== 4.8 Set TX and RX InvertIQ ==
7.6	242
	243
7.15	244	Set TX and RX InvertIQ ( 0,1) , (% style="color:blue" %)AT Command：AT+IQ(%%)
	245
7.9	246	0: Standard IQ setup
7.15	247
7.9	248	1: Inverted IQ setup
7.7	249
7.15	250
7.9	251	(% style="color:red" %)Default Value: AT+IQ=0,0 (%%) ~/~/ Invert IQ: 0,0
7.7	252
7.9	253	(% style="color:red" %)Range: (0 ~~ 1)
7.7	254
	255
	256
7.11	257	== 4.9 Set TX and RX Preamble Length ==
7.7	258
7.8	259
7.15	260	Set TX and RX Preamble Length ( 0 ~~ 65535 ) , (% style="color:blue" %)AT Command： AT+PREAMBLE(%%)
7.8	261
7.15	262
7.11	263	(% style="color:red" %)Default Value: AT+PREAMBLE=8,8 (%%) ~/~/ Preamble: 8,8
7.8	264
7.11	265	(% style="color:red" %)Range: ( 0 ~~ 65535 )
7.9	266
	267
7.12	268
7.11	269	== 4.10 Set Syncword ==
7.9	270
	271
7.15	272	Set Syncword(0: private，1: public), (% style="color:blue" %)AT Command : AT+SYNCWORD(%%)
7.9	273
7.15	274
7.11	275	(% style="color:red" %)Default Value: AT+SYNCWORD=0 (%%) ~/~/ 0x3444 for Public Network
7.9	276
7.11	277	(% style="color:red" %)Range: ( 0 ~~ 1 )
7.9	278
	279
7.11	280
7.12	281	== 4.11 Set TX and RX group ==
7.11	282
	283
7.15	284	Set TX and RX group. (0 ~~ 255)，(% style="color:blue" %)AT Command：AT+GROUPMOD(%%)
7.11	285
7.15	286	Group > 0: Device only accept same group transmision
7.11	287
7.15	288	Group = 0: Accept Any group
7.12	289
7.15	290
	291	(% style="color:red" %)Default Value: AT+GROUPMOD=0,0 (%%) ~/~/ Group: 0,0
	292
7.12	293	(% style="color:red" %)Range: ( 0 ~~ 255 )
	294
	295
7.13	296
	297
	298	== 4.12 Set Rx Timeout and Reply mode ==
	299
	300
7.15	301	Set Rx Timeout and Reply mode, Parameter 1, Parameter2， (% style="color:blue" %)AT Command：AT+RXMOD(%%)
7.13	302
7.15	303	Parameter 1:
7.13	304
7.15	305	0: Always no RX
7.13	306
7.15	307	1 ~~ 65534: Open RX window and last for specify seconds.
	308
	309	65535: RX window always open.
	310
	311
	312	~ Parameter 2:
	313
	314	0: No ACK
	315
	316	1: Send an ACK once got a message from another device. ACK Content is same as receive message
	317
	318	2: Send an ACK once got a message from another device. ACK Content is 0x00 FF
	319
	320
7.13	321	(% style="color:red" %)Default Value: AT+RXMOD=65535,2 (%%) ~/~/ RX Mode: 65535, 2
	322
	323
	324
	325	== 4.13 Send Message ==
	326
	327
7.15	328	Send Message， (% style="color:blue" %)AT Command：AT+SEND(%%)
	329
	330	Parameter 1: send hex or text
	331
7.13	332	0: Send hex
7.15	333
7.13	334	1: Send text
	335
	336
7.15	337	Parameter 2: Content
	338
	339
	340	Parameter 3 : ACK Type
	341
7.13	342	0: No ACK
7.15	343
7.13	344	1: Wait for ACK (Same as what we sent)
7.15	345
7.13	346	2: Wait for ACK ( 0x00 FF)
	347
	348
7.15	349	Parameter 4 : Retransmission ( 0 ~~ 8 )
	350
7.13	351	0: No re-transmission
7.15	352
7.13	353	1 ~~ 8: total sends 1~~8 transmission, interval 5 seconds
	354
	355
7.15	356	Example: AT+SEND=1,hello world,0,3
7.13	357
7.15	358	(% style="color:red" %)Notice: RX reply (Defined by AT+RXMOD) won't ask for TX ACK
7.14	359
7.15	360
	361
7.14	362	== 4.14 Print last receive message with RSSI and SNR ==
	363
	364
7.15	365	Print last receive message with RSSI and SNR，(% style="color:blue" %)AT+Command：AT+RECV(%%)
	366
7.14	367	0: Print in Hex
7.15	368
7.14	369	1: Print in text
	370
	371
7.15	372	Example: AT+RECV=0
	373	\\The recevied message will be clear after this command.
7.14	374
	375
	376
	377
	378
	379
	380
7.15	381
	382
7.13	383

Wiki source code of Instruction for LA66 Peer to Peer firmware

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