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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.
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26	26
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50	50
51	51	)))
52	52
53		-
54	54	== 1.2  Specifications ==
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56	56	(((
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79	79	)))
80	80
81	81	(((
82		-
83		-
84	84	**Interface for Model: LT22222-L:**
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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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181	181	* Firmware upgradable via program port
182	182	* Counting
183	183
184		-
185		-
186		-
187	187	== 1.4  Applications ==
188	188
189	189	* Smart Buildings & Home Automation
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193	193	* Smart Cities
194	194	* Smart Factory
195	195
196		-
197		-
198		-
199	199	== 1.5 Hardware Variants ==
200	200
201	201	(% border="1" style="background-color:#f7faff; width:500px" %)
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231	231
232	232	(((
233	233	In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>||anchor="H4.UseATCommand"]] to set the keys in the devices.
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234	234	)))
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236	236
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289	289	* **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
290	290	* **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
291	291
	279	+
	280	+
292	292	=== 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
293	293
294	294	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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327	327	* [1] RO1 relay channel is close and the RO1 LED is ON.
328	328	* [0] RO2 relay channel is open and RO2 LED is OFF;
329	329
	319	+
330	330	**LT22222-L:**
331	331
332	332	* [1] DI2 channel is high input and DI2 LED is ON;
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342	342	** DO1 is high in case there is load between DO1 and V+.
343	343	** DO1 LED is off in both case
344	344
	335	+
	336	+
345	345	=== 3.3.2 AT+MOD~=2, (Double DI Counting) ===
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347	347
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482	482
483	483	(((
484	484	Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
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	478	+
485	485	)))
486	486
487	487
488		-
489	489	=== 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
490	490
491	491
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638	638	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
639	639	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.**
640	640
	634	+
641	641	**AT Command to set Trigger Condition**:
642	642
643	643	(% style="color:#4f81bd" %)**Trigger base on voltage**:
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717	717
718	718	* Each bits shows if the corresponding trigger has been configured.
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	714	+
720	720	**Example:**
721	721
722	722	10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
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728	728
729	729	* Each bits shows which status has been trigger on this uplink.
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	726	+
731	731	**Example:**
732	732
733	733	10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
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739	739
740	740	* Each bits shows which status has been trigger on this uplink.
741	741
	738	+
742	742	**Example:**
743	743
744	744	00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
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767	767	)))
768	768
769	769
	767	+
770	770	== 3.4 ​Configure LT via AT or Downlink ==
771	771
772	772	User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
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779	779
780	780	* (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
781	781
	780	+
782	782	=== 3.4.1 Common Commands ===
783	783
784	784	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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2010	2010	)))
2011	2011
2012	2012	(((
2013		-== 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
	2012	+
2014	2014
2015		-If the device is not shut down, but directly powered off.
2016		-
2017		-It will default that this is a power-off state.
2018		-
2019		-In modes 2 to 5, DO RO status and pulse count are saved in flash.
2020		-
2021		-After restart, the status before power failure will be read from flash.
2022		-
2023	2023	= 6. Trouble Shooting =
2024	2024	)))
2025	2025