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

Version 20.1 by Bei Jinggeng on 2022/11/15 10:27

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

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

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