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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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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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209	209	* 1 x Counting Port
210	210	)))
211	211
212		-
213		-
214	214	= 2. Power ON Device =
215	215
216	216	The LT controller can be powered by 7 ~~ 24V DC power source. Connect VIN to Power Input V+ and GND to power input V- to power the LT controller.
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233	233
234	234	(((
235	235	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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	220	+
236	236	)))
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293	293
294	294
295	295
296		-
297	297	=== 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
298	298
299	299	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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332	332	* [1] RO1 relay channel is close and the RO1 LED is ON.
333	333	* [0] RO2 relay channel is open and RO2 LED is OFF;
334	334
	319	+
335	335	**LT22222-L:**
336	336
337	337	* [1] DI2 channel is high input and DI2 LED is ON;
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347	347	** DO1 is high in case there is load between DO1 and V+.
348	348	** DO1 LED is off in both case
349	349
	335	+
	336	+
350	350	=== 3.3.2 AT+MOD~=2, (Double DI Counting) ===
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352	352
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487	487
488	488	(((
489	489	Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
	477	+
	478	+
490	490	)))
491	491
492	492
493		-
494	494	=== 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
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496	496
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643	643	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
644	644	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.**
645	645
	634	+
646	646	**AT Command to set Trigger Condition**:
647	647
648	648	(% style="color:#4f81bd" %)**Trigger base on voltage**:
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722	722
723	723	* Each bits shows if the corresponding trigger has been configured.
724	724
	714	+
725	725	**Example:**
726	726
727	727	10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
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733	733
734	734	* Each bits shows which status has been trigger on this uplink.
735	735
	726	+
736	736	**Example:**
737	737
738	738	10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
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744	744
745	745	* Each bits shows which status has been trigger on this uplink.
746	746
	738	+
747	747	**Example:**
748	748
749	749	00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
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772	772	)))
773	773
774	774
	767	+
775	775	== 3.4 ​Configure LT via AT or Downlink ==
776	776
777	777	User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
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784	784
785	785	* (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
786	786
	780	+
787	787	=== 3.4.1 Common Commands ===
788	788
789	789	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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2015	2015	)))
2016	2016
2017	2017	(((
2018		-== 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
	2012	+
2019	2019
2020		-If the device is not shut down, but directly powered off.
2021		-
2022		-It will default that this is a power-off state.
2023		-
2024		-In modes 2 to 5, DO RO status and pulse count are saved in flash.
2025		-
2026		-After restart, the status before power failure will be read from flash.
2027		-
2028	2028	= 6. Trouble Shooting =
2029	2029	)))
2030	2030