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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 ==
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50	50	(((
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51	51	**Hardware System:**
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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:**
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	168	+
160	160	== 1.3 Features ==
161	161
162	162	* LoRaWAN Class A & Class C protocol
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206	206	[[image:1653297104069-180.png]]
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209	209	= 3. Operation Mode =
210	210
211	211	== 3.1 How it works? ==
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223	223	== 3.2 Example to join LoRaWAN network ==
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225	225	(((
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261	261	[[image:1653298044601-602.png||height="405" width="709"]]
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264	264	== 3.3 Uplink Payload ==
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266	266	There are five working modes + one interrupt mode on LT for different type application:
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309	309	* [1] RO1 relay channel is close and the RO1 LED is ON.
310	310	* [0] RO2 relay channel is open and RO2 LED is OFF;
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312	312	**LT22222-L:**
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314	314	* [1] DI2 channel is high input and DI2 LED is ON;
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324	324	** DO1 is high in case there is load between DO1 and V+.
325	325	** DO1 LED is off in both case
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327		-
328		-
329	329	=== 3.3.2 AT+MOD~=2, (Double DI Counting) ===
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331	331	**For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
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1150	1150	(% class="box infomessage" %)
1151	1151	(((
1152		-**AT+VOLMAX    ~/~/ See [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]**
	1164	+**AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
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1155	1155	* Downlink Payload (prefix 0xA5):
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1245	1245	[[image:image-20220524094641-12.png||height="402" width="718"]]
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1247	1247	**Step 3**: Create an account or log in Mydevices.
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1249	1249	**Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
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1868	1868	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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	1884	+== 5.5 Can i use point to point communication for LT-22222-L? ==
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	1886	+Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
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