Wiki source code of Point to Point Communication of LT-22222-L

Last modified by Edwin Chen on 2022/11/22 09:38

version	line-number	content
19.3	1	Table of Contents：
16.2	2
1.1	3	{{toc/}}
	4
16.2	5
	6
	7
19.3	8	= 1. Overview =
1.1	9
6.1	10	(((
19.2	11
	12
1.1	13	Shipped LT-22222-L is base on LoRaWAN protocol. We also develop a open source Point to Point LoRa protocol for LT-22222-L. The source code and hex file can be found at:
	14
25.1	15	* [[Source Code>>https://github.com/dragino/LT-22222-L]].
	16	* [[Firmware>>https://github.com/dragino/LT-22222-L/releases]].
6.1	17	)))
1.1	18
19.3	19	= 2. Features for this firmware =
1.1	20
19.3	21	== 2.1 Point To Point ==
4.2	22
19.3	23	=== 2.1.1 Overview ===
8.1	24
15.4	25
8.2	26	[[image:image-20220602111219-1.png\|\|height="472" width="972"]]
4.2	27
	28
19.3	29	=== 2.2.2 Configure ===
4.2	30
15.3	31
19.3	32	(% border="1" style="background-color:#f7faff; color:black; width:360px" %)
	33	\|=(% style="width: 179px;" %)A's configuration\|=(% style="width: 177px;" %)B's configuration
	34	\|(% style="width:179px" %)AT+GROUPMOD=0\|(% style="width:177px" %)AT+GROUPMOD=0
	35	\|(% style="width:179px" %)AT+TXCHS=868700000\|(% style="width:177px" %)AT+TXCHS=869000000
	36	\|(% style="width:179px" %)AT+RXCHS=869000000\|(% style="width:177px" %)AT+RXCHS=868700000
	37	\|(% style="width:179px" %)AT+TRIG1=2,50\|(% style="width:177px" %)AT+TRIG1=2,50
	38	\|(% style="width:179px" %)AT+TRIG2=2,50\|(% style="width:177px" %)AT+TRIG2=2,50
	39	\|(% style="width:179px" %)AT+DI1TODO1=2\|(% style="width:177px" %)AT+DI1TODO1=2
	40	\|(% style="width:179px" %)AT+DI1TORO1=2\|(% style="width:177px" %)AT+DI1TORO1=2
	41	\|(% style="width:179px" %)AT+DI2TODO2=2 \|(% style="width:177px" %)AT+DI2TODO2=2
	42	\|(% style="width:179px" %)AT+DI2TORO2=2\|(% style="width:177px" %)AT+DI2TORO2=2
4.2	43
19.3	44	=== 2.2.3 Serial port display ===
12.2	45
15.2	46
12.2	47	(% class="wikigeneratedid" %)
4.2	48	[[image:image-20220602111219-2.png]]
	49
	50
12.2	51	(% class="wikigeneratedid" %)
4.2	52	[[image:image-20220602111219-3.png]]
	53
19.2	54
12.2	55	(% class="wikigeneratedid" %)
	56	If the sender does not get the ACK reply from the receiver, it will retransmit up to 4 times, each interval is 6 seconds, and the UplinkCounter of the retransmission will not increase.
	57
	58
19.4	59	== 2.2 Point To Mult-Point ==
12.2	60
19.3	61	=== 2.2.1 Overview ===
12.2	62
	63
15.2	64	[[image:1654152390874-192.png]]
12.2	65
	66
19.3	67	=== 2.2.2 Configure ===
15.2	68
	69
19.2	70	(% style="color:blue" %)Configuration of the TX group:
15.2	71
	72	AT+GROUPMOD=0,2
	73
	74	AT+TXCHS=868700000
	75
	76	AT+RXCHS=869000000
	77
	78	AT+TRIG1=2,50
	79
	80	AT+TRIG2=2,50
	81
	82	AT+DI1TODO1=1
	83
	84	AT+DI1TORO1=1
	85
	86	AT+DI2TODO2=1
	87
	88	AT+DI2TORO2=1
	89
	90
19.2	91	(% style="color:blue" %)Configuration for RX group number 1:
15.2	92
	93	AT+GROUPMOD=1,1
	94
	95	AT+TXCHS=869000000
	96
	97	AT+RXCHS=868700000
	98
	99
19.2	100	(% style="color:blue" %)Configuration for RX group number 2:
15.2	101
	102	AT+GROUPMOD=1,2
	103
	104	AT+TXCHS=869000000
	105
	106	AT+RXCHS=868700000
	107
	108
19.3	109	=== 2.2.3 Serial port display ===
15.2	110
	111
	112	[[image:image-20220602144747-1.png]]
	113
	114
	115	[[image:image-20220602144747-2.png]]
	116
19.3	117
8.9	118	(((
15.2	119	If the TX group does not receive all the ACK replies from the RX group, it will retransmit up to 4 times, each time interval is 30 seconds, and the retransmission UplinkCounter will not increase.
8.9	120	)))
4.2	121
8.2	122
19.3	123	== 2.3 AT command ==
8.2	124
	125
11.3	126	(((
8.6	127	(% style="color:#037691" %)ATZ (%%): Trig a reset of the MCU
11.3	128	)))
8.2	129
11.3	130	(((
8.6	131	(% style="color:#037691" %)AT+FDR (%%): Reset Parameters to Factory Default, Keys Reserve
11.3	132	)))
8.2	133
11.3	134	(((
8.6	135	(% style="color:#037691" %)AT+FCU (%%): Get or Set the Frame Counter Uplink
11.3	136	)))
8.2	137
11.3	138	(((
8.6	139	(% style="color:#037691" %)AT+FCD (%%): Get or Set the Frame Counter Downlink
11.3	140	)))
8.2	141
11.3	142	(((
8.6	143	(% style="color:#037691" %)AT+TXP (%%): Get or Set the transmit power, the maximum is 20dBm (default is 14dBm)
11.3	144	)))
8.2	145
11.3	146	(((
8.8	147	(% style="color:#037691" %)AT+SYNC (%%): Get or Set the Sync word [1:0x34,0:0x12] (default is 1)
11.3	148	)))
8.2	149
11.3	150	(((
8.7	151	(% style="color:#037691" %)AT+PMB (%%): Get or Set the preamble (default:8)
11.3	152	)))
8.2	153
11.3	154	(((
8.6	155	(% style="color:#037691" %)AT+TXCHS (%%): Get or Set the transmit frequency of TX (default:868700000)
11.3	156	)))
8.2	157
11.3	158	(((
8.6	159	(% style="color:#037691" %)AT+TXSF (%%): Get or Set the spreading factor of TX (7 to 12) (default:12)
11.3	160	)))
8.2	161
11.3	162	(((
8.6	163	(% style="color:#037691" %)AT+RXCHS (%%): Get or Set the transmit frequency of RX (default:869000000)
11.3	164	)))
8.2	165
11.3	166	(((
8.6	167	(% style="color:#037691" %)AT+RXSF (%%): Get or Set the spreading factor of RX (7 to 12) (default:12)
11.3	168	)))
8.2	169
11.3	170	(((
9.2	171	(% style="color:#037691" %)AT+BW (%%): Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0)
11.3	172	)))
8.2	173
11.3	174	(((
8.7	175	(% style="color:#037691" %)AT+CR (%%): Get or Set the coding rate [1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8] (default:1)
11.3	176	)))
8.2	177
11.3	178	(((
8.6	179	(% style="color:#037691" %)AT+TDC (%%): Get or set the application data transmission interval in ms(default 10 minutes)
11.3	180	)))
8.2	181
11.3	182	(((
8.8	183	(% style="color:#037691" %)AT+VER (%%): Get firmware version number
11.3	184	)))
8.2	185
11.3	186	(((
9.2	187	(% style="color:#037691" %)AT+SEND (%%): Set Custom sent hex data
11.3	188	)))
8.2	189
11.3	190	(((
8.6	191	(% style="color:#037691" %)AT+GROUPMOD (%%): Set or Get the grouping mode of the device (default: 0)
11.3	192	)))
8.2	193
11.1	194	(((
11.3	195	(((
8.7	196	(% style="color:#037691" %)AT+GROUPID (%%): Set or Get the password for matching between TX group and RX group, which can be composed of numbers or characters (default: 12345678)
11.1	197	)))
11.3	198	)))
8.2	199
11.3	200	(((
8.6	201	(% style="color:#037691" %)AT+TRIG1 (%%): Set or Get the DI1 pin interrupt trigger mode (default 0,0)
11.3	202	)))
8.2	203
11.3	204	(((
8.7	205	(% style="color:#037691" %)AT+TRIG2 (%%): Set or Get the DI2 pin interrupt trigger mode (default 0,0)
11.3	206	)))
8.2	207
11.3	208	(((
8.7	209	(% style="color:#037691" %)AT+DI1TODO1 (%%): Set or get the mode in which DI1 maps to DO1 (default 0)
11.3	210	)))
8.2	211
11.3	212	(((
8.7	213	(% style="color:#037691" %)AT+DI1TORO1 (%%): Set or get the mode in which DI1 maps to RO1(default 0)
11.3	214	)))
8.2	215
11.3	216	(((
8.6	217	(% style="color:#037691" %)AT+DI2TODO2 (%%): Set or get the mode in which DI2 maps to DO2(default 0)
11.3	218	)))
8.2	219
11.3	220	(((
8.7	221	(% style="color:#037691" %)AT+DI2TORO2 (%%): Set or get the mode in which DI2 maps to RO2(default 0)
11.3	222	)))
8.2	223
	224
11.3	225	(((
19.3	226	(% style="color:blue" %)Example 1:
11.3	227	)))
8.2	228
11.3	229	(((
8.7	230	AT+SEND=01020304 will send a payload of 01020304
11.3	231	)))
8.2	232
	233
11.3	234	(((
19.2	235	(% style="color:blue" %)Example 2:
11.3	236	)))
8.2	237
11.3	238	(((
8.8	239	AT+TRIGx=a Trigger directly without triggering time
11.3	240	)))
8.2	241
11.3	242	(((
8.7	243	AT+TRIGx=a,b
11.3	244	)))
8.2	245
11.3	246	(((
19.3	247	a=0: falling edge;
11.3	248	)))
8.2	249
11.3	250	(((
19.3	251	a=1: rising edge;
11.3	252	)))
8.2	253
11.3	254	(((
19.3	255	a=2: falling edge or rising edge;
11.3	256	)))
8.2	257
11.3	258	(((
19.3	259	b: triggering time in milliseconds.
11.3	260	)))
8.2	261
11.3	262	(((
19.3	263	AT+TRIGx=2,50 Falling edge or rising edge trigger, and the trigger time exceeds 50ms.
11.3	264	)))
8.2	265
	266
11.3	267	(((
19.2	268	(% style="color:blue" %)Example 3:
11.3	269	)))
8.2	270
11.3	271	(((
8.7	272	AT+DI1TODO1= maps value
11.3	273	)))
8.2	274
11.3	275	(((
8.7	276	AT+DI1TORO1= maps value
11.3	277	)))
8.2	278
11.3	279	(((
8.7	280	AT+DI2TODO2= maps value
11.3	281	)))
8.2	282
11.3	283	(((
8.7	284	AT+DI2TORO2= maps value
11.3	285	)))
8.7	286
11.3	287	(((
	288
	289	)))
8.7	290
19.3	291	(% border="1" style="background-color:#f7faff; color:black; width:690px" %)
11.3	292	\|=(% style="width: 102px;" %)(((
	293	Maps value
	294	)))\|=(% style="width: 331px;" %)(((
	295	DIx to DOx
19.3	296	)))\|=(% style="width: 251px;" %)(((
11.3	297	DIx to ROx
	298	)))
	299	\|(% style="width:102px" %)(((
	300	0
	301	)))\|(% style="width:331px" %)(((
	302	No Action
19.3	303	)))\|(% style="width:251px" %)(((
11.3	304	No Action
	305	)))
	306	\|(% style="width:102px" %)(((
	307	1
	308	)))\|(% style="width:331px" %)(((
	309	If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level
19.3	310	)))\|(% style="width:251px" %)(((
11.3	311	(((
8.2	312	If DIx is high, control ROx to close,
11.3	313	)))
8.2	314
11.3	315	(((
8.2	316	if DIx is low, control ROx to open
	317	)))
11.3	318	)))
	319	\|(% style="width:102px" %)(((
	320	2
	321	)))\|(% style="width:331px" %)(((
	322	If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level
19.3	323	)))\|(% style="width:251px" %)(((
11.3	324	(((
8.2	325	If DIx is high, control ROx to open,
11.3	326	)))
8.2	327
11.3	328	(((
8.2	329	if DIx is low, control ROx to close
	330	)))
11.3	331	)))
	332	\|(% style="width:102px" %)(((
	333	3
	334	)))\|(% style="width:331px" %)(((
	335	DOx state flip
19.3	336	)))\|(% style="width:251px" %)(((
11.3	337	ROx state flip
	338	)))
8.2	339
11.3	340	(((
19.3	341
	342
19.2	343	(% style="color:blue" %)Example 4:
11.3	344	)))
8.2	345
11.3	346	(((
8.7	347	AT+GROUPMOD=0 Set to point to point mode
11.3	348	)))
8.2	349
11.3	350	(((
8.7	351	AT+GROUPMOD=0,aa Set the TX group that controls the number of aa (The maximum value of aa is 8)
11.3	352	)))
8.2	353
11.1	354	(((
8.7	355	AT+GROUPMOD=1,bb Set to the RX group controlled by the TX group, numbered bb(The maximum value of aa is 8)
11.1	356	)))
8.2	357
11.3	358	(((
8.7	359	AT+GROUPMOD=0,2 Set to control the TX group of the two RX groups
11.3	360	)))
8.2	361
11.3	362	(((
8.7	363	AT+GROUPMOD=1,1 Set the RX group numbered 1
11.3	364	)))
8.2	365
11.3	366	(((
8.7	367	AT+GROUPMOD=1,2 Set the RX group numbered 2
19.2	368	)))
19.1	369
	370
25.1	371	=== 2.3.1 TRIG command is configured in the transmit LT. (LT1)(Since firmware 1.3.2) ===
8.2	372
19.2	373
19.4	374	AT+TRIGx=a Trigger transmit directly without triggering time
8.2	375
19.3	376	AT+TRIGx=a,b Trigger transmit with triggering time threshold
19.1	377
19.4	378	AT+TRIGx=a,b,c Trigger transmit with triggering time threshold, and continue to transmit every xx seconds if DI status no change.
19.1	379
	380
19.3	381	a=0: falling edge;
19.1	382
19.3	383	a=1: rising edge;
19.1	384
19.3	385	a=2: falling edge or rising edge;
19.1	386
19.3	387	b: triggering time in milliseconds.
19.1	388
19.3	389	c: transmit interval
19.1	390
	391
19.3	392	(% style="color:blue" %)Use Case 1(%%): Once the DI1 port status change ( either from low to high or high to low, LT1 sends a trigger to LT-2)
19.1	393
19.3	394	Command:
19.1	395
19.3	396	AT+TRIG1=2,50 Falling edge or rising edge trigger, and the trigger time should exceed 50ms.
19.1	397
	398
19.3	399	(% style="color:blue" %)Use Case 2: (%%)Sync LT2 RO / DO status with LT1 every minute.
19.1	400
19.3	401	Command:
19.1	402
23.1	403	AT+TRIG2=2,50,60 Once there is falling edge or rising edge on DI2 of LT1, LT1 will transmit trigger to LT2 and LT2 can sync the status of RO/DO. After power off, power on, LT1 will send trigger without falling/rising edge, so the DI changes during power off will be sync as well.
19.1	404
	405
26.1	406	=== 2.3.2 RO/DO is configured in the transmit LT. (LT1) and receiver LT (LT2)(Since firmware 1.3.2) ===
19.1	407
19.3	408
27.1	409	(% style="color:red" %)Notice:(%%) LT1 MUST have a AT+DIxTODOx commands to send out the trigger. If LT2 has AT+DIxTOROx configured, LT2 will follow its configured and ignore LT1's AT+DIxTOROx settings.
26.1	410
	411
25.1	412	AT+DI1TODO1= maps value[,latch time, timeout_state]
19.1	413
25.1	414	AT+DI1TORO1= maps value[,latch time, timeout_state]
19.1	415
25.1	416	AT+DI2TODO2= maps value[,latch time, timeout_state]
19.1	417
25.1	418	AT+DI2TORO2= maps value[,latch time, timeout_state]
19.1	419
	420
19.3	421	(% border="1" style="background-color:#f7faff; color:black; width:774px" %)
	422	\|(% style="width:105px" %) Maps value\|(% style="width:415px" %)DIx to DOx\|(% style="width:249px" %)DIx to ROx
	423	\|(% style="width:105px" %)0\|(% style="width:415px" %)No Action\|(% style="width:249px" %)No Action
	424	\|(% style="width:105px" %)1\|(% style="width:415px" %)If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level\|(% style="width:249px" %)(((
19.1	425	If DIx is high, control ROx to close,
	426
	427	if DIx is low, control ROx to open
	428	)))
19.3	429	\|(% style="width:105px" %)2\|(% style="width:415px" %)If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level\|(% style="width:249px" %)(((
19.1	430	If DIx is high, control ROx to open,
	431
	432	if DIx is low, control ROx to close
	433	)))
19.3	434	\|(% style="width:105px" %)3\|(% style="width:415px" %)DOx state flip\|(% style="width:249px" %)ROx state flip
19.1	435
25.1	436	latch time, if latch time is defined, DO or RO will go back to the original status after latch time, if there is a new trigger comes, the LT2 will use the new latch time settings and ignore the old one.
19.1	437
	438
25.1	439	Timeout_State:
	440
	441	0: No change after timeout
	442
	443	1: Change to DO:0 or RO: Open after timeout
	444
	445	2: Change to DO:1 or RO: Close after timeout
	446
	447	3: Change back to state before last trigger arrive.
	448
	449
19.3	450	(% style="color:blue" %)Case1:
19.1	451
19.4	452	AT+DI1TODO1=1 ~/~/ LT2 DO1 will follow LT1 DI1 trigger command, if DI1 of LT1 is trigger high, DO1 of LT2 will output low, if DI1 of LT1 is trigger low, DO2 of LT2 will output high.
19.1	453
	454
19.3	455	(% style="color:blue" %)Case2:
19.1	456
25.1	457	AT+DI1TODO1=1,60,1 ~/~/ LT2 DO1 will follow LT1 DI1 trigger command, DO1 will keep the status 60 seconds and then change to open.
19.1	458
	459
	460	=== 2.3.3 Save the RO/DO status during power off(Since firmware 1.3) ===
	461
19.2	462
19.1	463	Enable/Disbale retain Digital Output/Relay Output after power off / Power On
	464
19.4	465	AT+DOROSAVE=0 ~/~/ Disable Retain after power off/on
19.1	466
19.4	467	AT+DOROSAVE=1 ~/~/ Enable Retain after power off/on
19.1	468
19.4	469	AT+DOROSAVE=2,a,b,c,d ~/~/ set DO/RO port to default state after power on.
19.1	470
19.4	471	a: for DO1
19.1	472
19.4	473	b: for DO2
19.1	474
19.4	475	c: for RO1
19.1	476
19.4	477	d: for RO2.
19.1	478
	479
19.3	480	Example:
19.1	481
19.3	482	AT+DOROSAVE=2,0,0,0,1 ~/~/ Set DO1/DO2 to Low, RO1 to open after power on , set RO2 to close after power on.
19.1	483
19.3	484
19.1	485	=== 2.3.4 Control Sleep status.(Since firmware 1.3) ===
	486
19.3	487
19.1	488	DI2 can be used to set LT into sleep mode.
	489
19.4	490	AT+DI2SLEEP=1 ~/~/ Enable DI2 as Sleep pin
19.1	491
19.4	492	AT+DI2SLEEP=0 ~/~/ Disable DI2 as Sleep pin
19.1	493
	494	When DI2 is enabled as sleep pin, a falling trigger (with 500ms pulse) will set LT into sleep mode. A raising trigger will wake up it again.
	495
22.1	496	In sleep mode, DORO will keep its initial state if AT+DOROSAVE=2, otherwise DORO will be in OFF state
19.1	497
22.1	498
19.3	499	== 2.4 Data Format ==
8.2	500
19.2	501
11.3	502	(((
8.2	503	8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum
11.3	504	)))
8.2	505
11.3	506	(((
22.1	507	(% style="color:blue" %)Payload:Payload triggered by TDC or DI
11.3	508	)))
8.2	509
19.3	510	(% border="1" style="background-color:#f7faff; color:black; width:825px" %)
	511	\|=(% style="width: 102px;" %)(((
11.3	512	Size (bytes)
19.3	513	)))\|=(% style="width: 74px;" %)(((
11.3	514	1
19.3	515	)))\|=(% style="width: 72px;" %)(((
11.3	516	1
19.3	517	)))\|=(% style="width: 47px;" %)(((
11.3	518	1
19.3	519	)))\|=(% style="width: 83px;" %)(((
11.3	520	1
19.3	521	)))\|=(% style="width: 90px;" %)(((
11.3	522	1
19.3	523	)))\|=(% style="width: 92px;" %)(((
11.3	524	1
19.3	525	)))\|=(% style="width: 78px;" %)(((
11.3	526	1
19.3	527	)))\|=(% style="width: 91px;" %)(((
11.3	528	1
19.3	529	)))\|=(% style="width: 91px;" %)(((
11.3	530	1
	531	)))
19.3	532	\|(% style="width:102px" %)(((
11.3	533	Value
19.3	534	)))\|(% style="width:74px" %)(((
11.3	535	address
19.3	536	)))\|(% style="width:72px" %)(((
11.3	537	request
19.3	538	)))\|(% style="width:47px" %)(((
11.3	539	ACK
19.3	540	)))\|(% style="width:83px" %)(((
11.3	541	(((
8.2	542	DI1&
	543	DI1 level
11.3	544	)))
19.3	545	)))\|(% style="width:90px" %)(((
11.3	546	DI1TODO1
19.3	547	)))\|(% style="width:92px" %)(((
11.3	548	DI1TORO1
19.3	549	)))\|(% style="width:78px" %)(((
11.3	550	(((
8.2	551	DI2&
19.3	552	DI2 leve
11.3	553	)))
19.3	554	)))\|(% style="width:91px" %)(((
11.3	555	DI2TODO2
19.3	556	)))\|(% style="width:91px" %)(((
11.3	557	DI2TORO2
	558	)))
8.2	559
11.3	560	(((
8.5	561	(% style="color:#037691" %)The first byte(%%): 00 is the broadcast address, 01-08 is the RX group number.
11.3	562	)))
8.2	563
11.3	564	(((
8.5	565	(% style="color:#037691" %)The second byte(%%): send mapping request when not 0, not request when it is 0.
11.3	566	)))
8.2	567
11.3	568	(((
8.5	569	(% style="color:#037691" %)The third byte(%%): ACK returned to the sender after the mapping is completed.
11.3	570	)))
8.2	571
11.1	572	(((
11.3	573	(((
8.5	574	(% style="color:#037691" %)The fourth byte(%%): the high four bits are 1 to represent DI1, and the low four bits are the level of DI1 when the interrupt is triggered.
11.1	575	)))
11.3	576	)))
8.2	577
11.3	578	(((
8.6	579	(% style="color:#037691" %)The Fifth byte(%%): DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered.
11.3	580	)))
8.2	581
11.3	582	(((
8.5	583	(% style="color:#037691" %)The Sixth byte(%%): 0 does not trigger interrupt when DI1TORO1 interrupt is triggered.
11.3	584	)))
8.2	585
11.1	586	(((
11.3	587	(((
8.5	588	(% style="color:#037691" %)The seventh byte(%%): the high four bits are 2 to represent DI2, and the low four bits are the level of DI2 when the interrupt is triggered.
11.1	589	)))
11.3	590	)))
8.2	591
11.3	592	(((
8.6	593	(% style="color:#037691" %)The 8th byte(%%): DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered.
11.3	594	)))
8.2	595
11.3	596	(((
8.5	597	(% style="color:#037691" %)The 9th byte(%%): DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered.
11.3	598	)))
8.2	599
19.1	600	(((
1.1	601
19.1	602
19.3	603	(% style="color:blue" %)Payload:（Since firmware 1.3）The receiver replies to the sent packet
19.1	604	)))
	605
19.3	606	(% border="1" style="background-color:#f7faff; color:black; width:822px" %)
	607	\|=(% style="width: 97px;" %)(((
	608	Size(bytes)
	609	)))\|=(% style="width: 71px;" %)(((
19.1	610	1
19.3	611	)))\|=(% style="width: 70px;" %)(((
19.1	612	1
19.3	613	)))\|=(% style="width: 48px;" %)(((
19.1	614	1
19.3	615	)))\|=(% style="width: 85px;" %)(((
19.1	616	1
19.3	617	)))\|=(% style="width: 90px;" %)(((
19.1	618	1
19.3	619	)))\|=(% style="width: 88px;" %)(((
19.1	620	1
19.3	621	)))\|=(% style="width: 86px;" %)(((
19.1	622	1
19.3	623	)))\|=(% style="width: 92px;" %)(((
19.1	624	1
19.3	625	)))\|=(% style="width: 92px;" %)(((
19.1	626	1
	627	)))
19.3	628	\|(% style="width:97px" %)(((
19.1	629	Value
19.3	630	)))\|(% style="width:71px" %)(((
19.1	631	address
	632	)))\|(% style="width:70px" %)(((
	633	request
19.3	634	)))\|(% style="width:48px" %)(((
19.1	635	ACK
19.3	636	)))\|(% style="width:85px" %)(((
19.1	637	(((
20.1	638	DOI1&
	639	DOI2 level
19.1	640	)))
19.3	641	)))\|(% style="width:90px" %)(((
19.1	642	DI1TODO1
19.3	643	)))\|(% style="width:88px" %)(((
19.1	644	DI1TORO1
19.3	645	)))\|(% style="width:86px" %)(((
19.1	646	(((
	647	RO2&
	648	RO2 level
	649	)))
19.3	650	)))\|(% style="width:92px" %)(((
19.1	651	DI2TODO2
19.3	652	)))\|(% style="width:92px" %)(((
19.1	653	DI2TORO2
	654	)))
	655
	656	(((
	657	(% style="color:#037691" %)The first byte(%%): 00 is the broadcast address, 01-08 is the RX group number.
	658	)))
	659
	660	(((
	661	(% style="color:#037691" %)The second byte(%%): send mapping request when not 0, not request when it is 0.
	662	)))
	663
	664	(((
	665	(% style="color:#037691" %)The third byte(%%): ACK returned to the sender after the mapping is completed.
	666	)))
	667
	668	(((
	669	(((
21.1	670	(% style="color:#037691" %)The fourth byte(%%): the high four bits are 1 to represent DOI1, and the low four bits are the level of DOI2 when the interrupt is triggered.
19.1	671	)))
	672	)))
	673
	674	(((
	675	(% style="color:#037691" %)The Fifth byte(%%): DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered.
	676	)))
	677
	678	(((
	679	(% style="color:#037691" %)The Sixth byte(%%): 0 does not trigger interrupt when DI1TORO1 interrupt is triggered.
	680	)))
	681
	682	(((
	683	(((
	684	(% style="color:#037691" %)The seventh byte(%%): the high four bits are 2 to represent RO2, and the low four bits are the level of RO2 when the interrupt is triggered.
	685	)))
	686	)))
	687
	688	(((
	689	(% style="color:#037691" %)The 8th byte(%%): DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered.
	690	)))
	691
	692	(((
	693	(% style="color:#037691" %)The 9th byte(%%): DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered.
	694	)))
	695
	696

Wiki source code of Point to Point Communication of LT-22222-L

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