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14	14	= 1.Introduction =
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16	16	== 1.1 What is LT Series I/O Controller ==
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48	48	== 1.2  Specifications ==
49	49
50	50	(((
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51	51	**Hardware System:**
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70	70	)))
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73	73	(((
74	74	**Interface for Model: LT22222-L:**
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93	93	Power Input 7~~ 24V DC.
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96	96	(((
97	97	**LoRa Spec:**
98	98	)))
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158	158	)))
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	168	+
160	160	== 1.3 Features ==
161	161
162	162	* LoRaWAN Class A & Class C protocol
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168	168	* Counting
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170	170
	180	+
171	171	== 1.4  Applications ==
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173	173	* Smart Buildings & Home Automation
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178	178	* Smart Factory
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181	181	== 1.5 Hardware Variants ==
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183	183	(% border="1" style="background-color:#f7faff; width:500px" %)
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192	192	)))
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195	195	= 2. Power ON Device =
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197	197	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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203	203	[[image:1653297104069-180.png]]
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206	206	= 3. Operation Mode =
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208	208	== 3.1 How it works? ==
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218	218	)))
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220	220	== 3.2 Example to join LoRaWAN network ==
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258	258	[[image:1653298044601-602.png||height="405" width="709"]]
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261	261	== 3.3 Uplink Payload ==
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263	263	There are five working modes + one interrupt mode on LT for different type application:
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270	270	* **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
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273	273	=== 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
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275	275	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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305	305	* [1] RO1 relay channel is close and the RO1 LED is ON.
306	306	* [0] RO2 relay channel is open and RO2 LED is OFF;
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308	308	**LT22222-L:**
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310	310	* [1] DI2 channel is high input and DI2 LED is ON;
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321	321	** DO1 LED is off in both case
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324	324	=== 3.3.2 AT+MOD~=2, (Double DI Counting) ===
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326	326	**For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
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414	414	)))
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417	417	=== 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
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419	419	**LT22222-L**: This mode the DI1 is used as a counting pin.
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458	458
459	459	)))
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461	461	=== 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
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463	463	**LT22222-L**: This mode the DI1 is used as a counting pin.
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539	539	)))
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542	542	=== 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
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544	544	**LT22222-L**: This mode the DI1 is used as a counting pin.
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583	583
584	584	)))
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586	586	=== 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
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588	588	(% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
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706	706	When device got this command, it will send the MOD6 payload.
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709	709	=== 3.3.7 Payload Decoder ===
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717	717	== 3.4 ​Configure LT via AT or Downlink ==
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719	719	User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
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727	727	* (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
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729	729	=== 3.4.1 Common Commands ===
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731	731	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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734	734	=== 3.4.2 Sensor related commands ===
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736	736	==== 3.4.2.1 Set Transmit Interval ====
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754	754	)))
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757	757	==== 3.4.2.2 Set Work Mode (AT+MOD) ====
758	758
759	759	Set work mode.
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775	775	)))
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778	778	==== 3.4.2.3 Poll an uplink ====
779	779
780	780	* AT Command:
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791	791	**Example**: 0x08FF, ask device to send an Uplink
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794	794	==== 3.4.2.4 Enable Trigger Mode ====
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796	796	Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
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814	814	)))
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817	817	==== 3.4.2.5 Poll trigger settings ====
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819	819	Poll trigger settings,
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830	830	)))
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833	833	==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
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835	835	Enable Disable DI1/DI2/DI2 as trigger,
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1864	1864	User can run AT+DEBUG command to see the counting event in serial. If firmware too old and doesn’t support AT+DEBUG. User can update to latest firmware first.
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	1903	+== 5.5 Can i use point to point communication for LT-22222-L? ==
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	1905	+Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
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1866	1866
1867	1867	)))
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