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19	19	== 1.1 What is LT Series I/O Controller ==
20	20
21	21	(((
22		-
23		-
24	24	The Dragino (% style="color:blue" %)**LT series I/O Modules**(%%) are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as:** (% style="color:blue" %)analog current Input, analog voltage input(%%)**(% style="color:blue" %), **relay output**, **digital input**(%%) and (% style="color:blue" %)**digital output**(%%) etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
25	25	)))
26	26
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50	50
51	51	)))
52	52
53		-
54	54	== 1.2  Specifications ==
55	55
56	56	(((
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79	79	)))
80	80
81	81	(((
82		-
83		-
84	84	**Interface for Model: LT22222-L:**
85	85	)))
86	86
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104	104	)))
105	105
106	106	(((
107		-
108		-
109	109	**LoRa Spec:**
110	110	)))
111	111
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166	166	* (((
167	167	Packet engine up to 256 bytes with CRC.
168	168
169		-
170		-
171	171
172	172	)))
173	173
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283	283	* **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
284	284	* **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
285	285
	277	+
	278	+
286	286	=== 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
287	287
288	288	The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
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321	321	* [1] RO1 relay channel is close and the RO1 LED is ON.
322	322	* [0] RO2 relay channel is open and RO2 LED is OFF;
323	323
	317	+
324	324	**LT22222-L:**
325	325
326	326	* [1] DI2 channel is high input and DI2 LED is ON;
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336	336	** DO1 is high in case there is load between DO1 and V+.
337	337	** DO1 LED is off in both case
338	338
	333	+
	334	+
339	339	=== 3.3.2 AT+MOD~=2, (Double DI Counting) ===
340	340
341	341
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476	476
477	477	(((
478	478	Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
	475	+
	476	+
479	479	)))
480	480
481	481
482		-
483	483	=== 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
484	484
485	485
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632	632	1. Periodically uplink (Base on TDC time). Payload is same as the normal MOD (MOD 1 for above command). This uplink uses LoRaWAN (% style="color:#4f81bd" %)**unconfirmed**(%%) data type
633	633	1. Trigger uplink when meet the trigger condition. LT will sent two packets in this case, the first uplink use payload specify in this mod (mod=6), the second packets use the normal mod payload(MOD=1 for above settings). Both Uplinks use LoRaWAN (% style="color:#4f81bd" %)**CONFIRMED data type.**
634	634
	632	+
635	635	**AT Command to set Trigger Condition**:
636	636
637	637	(% style="color:#4f81bd" %)**Trigger base on voltage**:
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711	711
712	712	* Each bits shows if the corresponding trigger has been configured.
713	713
	712	+
714	714	**Example:**
715	715
716	716	10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
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722	722
723	723	* Each bits shows which status has been trigger on this uplink.
724	724
	724	+
725	725	**Example:**
726	726
727	727	10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
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733	733
734	734	* Each bits shows which status has been trigger on this uplink.
735	735
	736	+
736	736	**Example:**
737	737
738	738	00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
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761	761	)))
762	762
763	763
	765	+
764	764	== 3.4 ​Configure LT via AT or Downlink ==
765	765
766	766	User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
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773	773
774	774	* (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
775	775
	778	+
776	776	=== 3.4.1 Common Commands ===
777	777
778	778	They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
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2004	2004	)))
2005	2005
2006	2006	(((
2007		-== 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
	2010	+
2008	2008
2009		-If the device is not shut down, but directly powered off.
2010		-
2011		-It will default that this is a power-off state.
2012		-
2013		-In modes 2 to 5, DO RO status and pulse count are saved in flash.
2014		-
2015		-After restart, the status before power failure will be read from flash.
2016		-
2017	2017	= 6. Trouble Shooting =
2018	2018	)))
2019	2019