Last modified by Saxer Lin on 2025/04/15 17:24
<
From version < 134.1 >
edited by Edwin Chen
on 2024/05/08 22:32
To version < 158.1 >
edited by Dilisi S
on 2024/11/01 05:19
>
Change comment: Oct 31 edits - part 2

Summary

Details

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Author
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1 -XWiki.Edwin
1 +XWiki.pradeeka
Content
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19 19  
20 20  = 1.Introduction =
21 21  
22 -== 1.1 What is LT Series I/O Controller ==
22 +== 1.1 What is the LT-22222-L I/O Controller? ==
23 23  
24 24  (((
25 -
26 -
27 27  (((
28 -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.
29 -)))
30 -)))
26 +The Dragino (% style="color:blue" %)**LT-22222-L I/O Controller**(%%) is an advanced LoRaWAN device designed to provide seamless wireless long-range connectivity with various I/O options, including analog current and voltage inputs, digital inputs and outputs, and relay outputs.
31 31  
32 -(((
33 -The LT I/O Controllers allows the user to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building automation, and so on.
28 +The LT-22222-L I/O Controller simplifies and enhances I/O monitoring and controlling. It is ideal for professional applications in wireless sensor networks, including irrigation systems, smart metering, smart cities, building automation, and more. These controllers are designed for easy, cost-effective deployment using LoRa wireless technology.
34 34  )))
35 -
36 -(((
37 -The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
38 38  )))
39 39  
40 40  (((
41 -The use environment includes:
33 +With the LT-22222-L I/O Controller, users can transmit data over ultra-long distances with low power consumption using LoRa, a spread-spectrum modulation technique derived from chirp spread spectrum (CSS) technology that operates on license-free ISM bands.
42 42  )))
43 43  
44 -(((
45 -1) If user's area has LoRaWAN service coverage, they can just install the I/O controller and configure it to connect the LoRaWAN provider via wireless.
46 -)))
36 +> The LT Series I/O Controllers are designed for easy, low-cost installation on LoRaWAN networks.
47 47  
48 48  (((
49 -2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
39 +You can connect the LT-22222-L I/O Controller to a LoRaWAN network service provider in several ways:
50 50  
51 -
41 +* If there is public LoRaWAN network coverage in the area where you plan to install the device (e.g., The Things Network), you can select a network and register the LT-22222-L I/O controller with it.
42 +* If there is no public LoRaWAN coverage in your area, you can set up a LoRaWAN gateway, or multiple gateways, and connect them to a LoRaWAN network server to create adequate coverage. Then, register the LT-22222-L I/O controller with this network.
43 +* Setup your own private LoRaWAN network.
44 +
45 +> You can use the Dragino LG308 gateway to expand or create LoRaWAN coverage in your area.
52 52  )))
53 53  
54 54  (((
... ... @@ -68,7 +68,6 @@
68 68  ** 20dB Transmit: 34mA@12v
69 69  * Operating Temperature: -40 ~~ 85 Degree, No Dew
70 70  
71 -
72 72  (% style="color:#037691" %)**Interface for Model: LT22222-L:**
73 73  
74 74  * 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
... ... @@ -78,7 +78,6 @@
78 78  * 2 x 0~~30V Analog Input (res:0.01v)
79 79  * Power Input 7~~ 24V DC. 
80 80  
81 -
82 82  (% style="color:#037691" %)**LoRa Spec:**
83 83  
84 84  * Frequency Range:
... ... @@ -136,85 +136,140 @@
136 136  * 1 x Counting Port
137 137  )))
138 138  
139 -= 2. Power ON Device =
131 += 2. Assembling the Device =
140 140  
141 -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.
133 +== 2.1 What is included in the package? ==
142 142  
143 -PWR will on when device is properly powered.
135 +The package includes the following items:
144 144  
137 +* 1 x LT-22222-L I/O Controller
138 +* 1 x LoRaWAN antenna matched to the frequency of the LT-22222-L
139 +* 1 x bracket for wall mounting
140 +* 1 x programming cable
141 +
142 +Attach the LoRaWAN antenna to the connector labeled **ANT** (located on the top right side of the device, next to the upper terminal block). Secure the antenna by tightening it clockwise.
143 +
144 +== 2.2 Terminals ==
145 +
146 +Upper screw terminal block (from left to right):
147 +
148 +(% style="width:634px" %)
149 +|=(% style="width: 295px;" %)Terminal|=(% style="width: 338px;" %)Function
150 +|(% style="width:295px" %)GND|(% style="width:338px" %)Ground
151 +|(% style="width:295px" %)VIN|(% style="width:338px" %)Input Voltage
152 +|(% style="width:295px" %)AVI2|(% style="width:338px" %)Analog Voltage Input Terminal 2
153 +|(% style="width:295px" %)AVI1|(% style="width:338px" %)Analog Voltage Input Terminal 1
154 +|(% style="width:295px" %)ACI2|(% style="width:338px" %)Analog Current Input Terminal 2
155 +|(% style="width:295px" %)ACI1|(% style="width:338px" %)Analog Current Input Terminal 1
156 +
157 +Lower screw terminal block (from left to right):
158 +
159 +(% style="width:633px" %)
160 +|=(% style="width: 296px;" %)Terminal|=(% style="width: 334px;" %)Function
161 +|(% style="width:296px" %)RO1-2|(% style="width:334px" %)Relay Output 1
162 +|(% style="width:296px" %)RO1-1|(% style="width:334px" %)Relay Output 1
163 +|(% style="width:296px" %)RO2-2|(% style="width:334px" %)Relay Output 2
164 +|(% style="width:296px" %)RO2-1|(% style="width:334px" %)Relay Output 2
165 +|(% style="width:296px" %)DI2+|(% style="width:334px" %)Digital Input 2
166 +|(% style="width:296px" %)DI2-|(% style="width:334px" %)Digital Input 2
167 +|(% style="width:296px" %)DI1+|(% style="width:334px" %)Digital Input 1
168 +|(% style="width:296px" %)DI1-|(% style="width:334px" %)Digital Input 1
169 +|(% style="width:296px" %)DO2|(% style="width:334px" %)Digital Output 2
170 +|(% style="width:296px" %)DO1|(% style="width:334px" %)Digital Output 1
171 +
172 +== 2.3 Powering ==
173 +
174 +The LT-22222-L I/O Controller can be powered by a 7–24V DC power source. Connect the power supply’s positive wire to the VIN screw terminal and the negative wire to the GND screw terminal. The power indicator (PWR) LED will turn on when the device is properly powered.
175 +
176 +
145 145  [[image:1653297104069-180.png]]
146 146  
147 147  
148 148  = 3. Operation Mode =
149 149  
150 -== 3.1 How it works? ==
182 +== 3.1 How does it work? ==
151 151  
184 +The LT-22222-L is configured to operate in LoRaWAN Class C mode by default. It supports OTAA (Over-the-Air Activation), which is the most secure method for activating a device with a LoRaWAN network server. The LT-22222-L comes with device registration information that allows you to register it with a LoRaWAN network, enabling the device to perform OTAA activation with the network server upon initial power-up and after any subsequent reboots.
152 152  
153 -(((
154 -The LT is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the LT. It will auto join the network via OTAA. For LT-22222-L, the LED will show the Join status: After power on (% style="color:green" %)**TX LED**(%%) will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. (% style="color:green" %)**TX LED**(%%) will be on for 5 seconds after joined in network. When there is message from server, the RX LED will be on for 1 second. 
155 -)))
186 +For LT-22222-L, the LED will show the Join status: After power on (% style="color:green" %)**TX LED**(%%) will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. (% style="color:green" %)**TX LED**(%%) will be on for 5 seconds after joined in network. When there is message from server, the RX LED will be on for 1 second. 
156 156  
157 -(((
158 -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.
159 -)))
188 +In case you can't set the root key and other identifiers in the network server and must use them from the server, you can use [[AT Commands>>||anchor="H4.UseATCommand"]] to configure them on the device.
160 160  
190 +== 3.2 Registering with a LoRaWAN network server ==
161 161  
162 -== 3.2 Example to join LoRaWAN network ==
192 +The diagram below shows how the LT-22222-L connects to a typical LoRaWAN network.
163 163  
194 +[[image:image-20220523172350-1.png||height="266" width="864"]]
164 164  
165 -(((
166 -This chapter shows an example for how to join the TTN LoRaWAN Network. Below is the network structure, we use our LG308 as LoRaWAN gateway here. 
196 +=== 3.2.1 Prerequisites ===
167 167  
168 -
169 -)))
198 +Make sure you have the device registration information such as DevEUI, AppEUI, and AppKey with you. The registration information can be found on a sticker that can be found inside the package. Please keep the **registration information** sticker in a safe place for future reference.
170 170  
171 -[[image:image-20220523172350-1.png||height="266" width="864"]]
200 +[[image:image-20230425173427-2.png||height="246" width="530"]]
172 172  
202 +The following subsections explain how to register the LT-22222-L with different LoRaWAN network server providers.
173 173  
174 -(((
175 -The LG308 is already set to connect to [[TTN network >>url:https://www.thethingsnetwork.org/]]. So what we need to do now is only configure register this device to TTN:
204 +=== 3.2.2 The Things Stack Sandbox (TTSS) ===
176 176  
177 -
178 -)))
206 +* Log in to your [[The Things Stack Sandbox>>https://eu1.cloud.thethings.network]] account.
207 +* Create an application if you do not have one yet.
208 +* Register LT-22222-L with that application. Two registration options available:
179 179  
180 -(((
181 -(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
182 -)))
210 +==== Using the LoRaWAN Device Repository: ====
183 183  
184 -(((
185 -Each LT is shipped with a sticker with the default device EUI as below:
186 -)))
212 +* Go to your application and click on the **Register end device** button.
213 +* On the **Register end device** page:
214 +** Select the option **Select the end device in the LoRaWAN Device Repository**.
215 +** Choose the **End device brand**, **Model**, **Hardware version**, **Firmware version**, and **Profile (Region)**.
216 +** Select the **Frequency plan** that matches with your device.
187 187  
188 -[[image:image-20230425173427-2.png||height="246" width="530"]]
218 +[[image:lt-22222-l-dev-repo-reg-p1.png||height="625" width="1000"]]
189 189  
220 +*
221 +** Enter the **AppEUI** in the **JoinEUI** field and click **Confirm** button.
222 +** Enter the **DevEUI** in the **DevEUI** field.
223 +** Enter the **AppKey** in the **AppKey** field.
224 +** In the **End device ID** field, enter a unique name within this application for your LT-22222-N.
225 +** Under **After registration**, select the **View registered end device** option.
190 190  
191 -Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
227 +[[image:lt-22222-l-dev-repo-reg-p2.png||height="625" width="1000"]]
192 192  
193 -**Add APP EUI in the application.**
229 +==== Entering device information manually: ====
194 194  
195 -[[image:1653297955910-247.png||height="321" width="716"]]
231 +* On the **Register end device** page:
232 +** Select the **Enter end device specifies manually** option as the input method.
233 +** Select the **Frequency plan** that matches with your device.
234 +** Select the **LoRaWAN version**.
235 +** Select the **Regional Parameters version**.
236 +** Click **Show advanced activation, LoRaWAN class and cluster settings** link to expand the section.
237 +** Select **Over the air activation (OTAA)** option under **Activation mode**
238 +** Select **Class C (Continuous)** from the **Additional LoRaWAN class capabilities**.
196 196  
240 +[[image:lt-22222-l-manually-p1.png||height="625" width="1000"]]
197 197  
198 -**Add APP KEY and DEV EUI**
199 199  
200 -[[image:1653298023685-319.png]]
243 +* Enter **AppEUI** in the **JoinEUI** field and click **Confirm** button.
244 +* Enter **DevEUI** in the **DevEUI** field.
245 +* Enter **AppKey** in the **AppKey** field.
246 +* In the **End device ID** field, enter a unique name within this application for your LT-22222-N.
247 +* Under **After registration**, select the **View registered end device** option.
201 201  
249 +[[image:lt-22222-l-manually-p2.png||height="625" width="1000"]]
202 202  
203 -(((
204 -(% style="color:blue" %)**Step 2**(%%): Power on LT and it will auto join to the TTN network. After join success, it will start to upload message to TTN and user can see in the panel.
205 205  
206 -
207 -)))
252 +==== Joining ====
208 208  
254 +Click on **Live Data** in the left navigation. Then, power on the device, and it will join The Things Stack Sandbox. You can see the join request, join accept, followed by uplink messages form the device showing in the Live Data panel.
255 +
209 209  [[image:1653298044601-602.png||height="405" width="709"]]
210 210  
211 211  
212 -== 3.3 Uplink Payload ==
259 +== 3.3 Uplink Payload formats ==
213 213  
214 214  
215 -There are five working modes + one interrupt mode on LT for different type application:
262 +The LT-22222-L has 5 working modes. It also has an interrupt/trigger mode for different type applications that can be used together with all the working modes as an additional feature. The default mode is MOD1 and you can switch between these modes using AT commands.
216 216  
217 -* (% style="color:blue" %)**MOD1**(%%): (default setting): 2 x ACI + 2AVI + DI + DO + RO
264 +* (% style="color:blue" %)**MOD1**(%%): (default mode/factory set): 2 x ACI + 2AVI + DI + DO + RO
218 218  
219 219  * (% style="color:blue" %)**MOD2**(%%): Double DI Counting + DO + RO
220 220  
... ... @@ -230,7 +230,7 @@
230 230  
231 231  
232 232  (((
233 -The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default. (% style="display:none" %)
280 +In working mode MOD1, the uplink payload includes a total of 9 bytes. Uplink packets are sent over LoRaWAN FPort=2. By default, one uplink is sent every 10 minutes. (% style="display:none" %)
234 234  
235 235  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
236 236  |(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
... ... @@ -248,23 +248,23 @@
248 248  )))
249 249  
250 250  (((
251 -(% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
298 +(% style="color:#4f81bd" %)*** DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1, for a total of 1 byte ,as shown below
252 252  
253 253  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
254 -|**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
255 -|RO1|RO2|DI3|DI2|DI1|DO3|DO2|DO1
301 +|**bit 7**|**bit 6**|**bit 5**|**bit 4**|**bit 3**|**bit 2**|**bit 1**|**bit 0**
302 +|RO1|RO2|--DI3--|DI2|DI1|--DO3--|DO2|DO1
256 256  )))
257 257  
258 -* RO is for relay. ROx=1 : close, ROx=0 always open.
259 -* DI is for digital input. DIx=1: high or float, DIx=0: low.
260 -* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
305 +* RO is for relay. ROx=1 : closed, ROx=0 always open.
306 +* DI is for digital input. DIx=1: high or floating, DIx=0: low.
307 +* DO is for reverse digital output. DOx=1: output low, DOx=0: high or floating.
261 261  
262 -(% style="color:red" %)**Note: DI3 and DO3 bit are not valid for LT-22222-L**
309 +(% style="color:red" %)**Note: DI3 and DO3 bits are not valid for LT-22222-L**
263 263  
264 -For example if payload is: [[image:image-20220523175847-2.png]]
311 +For example, if the payload is: [[image:image-20220523175847-2.png]]
265 265  
266 266  
267 -**The value for the interface is:  **
314 +**The interface values can be calculated as follows:  **
268 268  
269 269  AVI1 channel voltage is 0x04AB/1000=1195(DEC)/1000=1.195V
270 270  
... ... @@ -276,23 +276,23 @@
276 276  
277 277  The last byte 0xAA= 10101010(B) means
278 278  
279 -* [1] RO1 relay channel is close and the RO1 LED is ON.
280 -* [0] RO2 relay channel is open and RO2 LED is OFF;
326 +* [1] RO1 relay channel is closed, and the RO1 LED is ON.
327 +* [0] RO2 relay channel is open, and RO2 LED is OFF.
281 281  
282 282  **LT22222-L:**
283 283  
284 -* [1] DI2 channel is high input and DI2 LED is ON;
285 -* [0] DI1 channel is low input;
331 +* [1] DI2 channel is high input and DI2 LED is ON.
332 +* [0] DI1 channel is low input.
286 286  
287 287  * [0] DO3 channel output state
288 -** DO3 is float in case no load between DO3 and V+.;
335 +** DO3 is float in case no load between DO3 and V+.
289 289  ** DO3 is high in case there is load between DO3 and V+.
290 290  ** DO3 LED is off in both case
291 291  * [1] DO2 channel output is low and DO2 LED is ON.
292 292  * [0] DO1 channel output state
293 -** DO1 is float in case no load between DO1 and V+.;
340 +** DO1 is float in case no load between DO1 and V+.
294 294  ** DO1 is high in case there is load between DO1 and V+.
295 -** DO1 LED is off in both case
342 +** DO1 LED is off in both case.
296 296  
297 297  === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
298 298  
... ... @@ -1306,54 +1306,71 @@
1306 1306  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173929-8.png?width=1205&height=76&rev=1.1||alt="image-20220823173929-8.png"]]
1307 1307  
1308 1308  
1309 -== 3.5 Integrate with Mydevice ==
1356 +== 3.5 Integrating with ThingsEye.io ==
1310 1310  
1358 +If you are using one of The Things Stack plans, you can integrate ThingsEye.io with your application. Once integrated, ThingsEye.io works as an MQTT client for The Things Stack MQTT broker, allowing it to subscribe to upstream traffic and publish downlink traffic.
1311 1311  
1312 -Mydevices provides a human friendly interface to show the sensor data, once we have data in TTN, we can use Mydevices to connect to TTN and see the data in Mydevices. Below are the steps:
1360 +=== 3.5.1 Configuring The Things Stack Sandbox ===
1313 1313  
1314 -(((
1315 -(% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1316 -)))
1362 +* Go to your Application and select MQTT under Integrations.
1363 +* In the Connection credentials section, under Username, The Thins Stack displays an auto-generated username. You can use it or provide a new one.
1364 +* For the Password, click the Generate new API key button to generate a password. You can see it by clicking on the eye button.
1317 1317  
1318 -(((
1319 -(% style="color:blue" %)**Step 2**(%%): To configure the Application to forward data to Mydevices you will need to add integration. To add the Mydevices integration, perform the following steps:
1366 +[[image:tts-mqtt-integration.png||height="625" width="1000"]]
1320 1320  
1321 -
1322 -)))
1368 +=== 3.5.2 Configuring ThingsEye.io ===
1323 1323  
1324 -[[image:image-20220719105525-1.png||height="377" width="677"]]
1370 +* Login to your thingsEye.io account.
1371 +* Under the Integrations center, click Integrations.
1372 +* Click the Add integration button (the button with the + symbol).
1325 1325  
1374 +[[image:thingseye-io-step-1.png||height="625" width="1000"]]
1326 1326  
1327 1327  
1328 -[[image:image-20220719110247-2.png||height="388" width="683"]]
1377 +On the Add integration page configure the following:
1329 1329  
1379 +Basic settings:
1330 1330  
1331 -(% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1381 +* Select The Things Stack Community from the Integration type list.
1382 +* Enter a suitable name for your integration in the Name box or keep the default name.
1383 +* Click the Next button.
1332 1332  
1333 -(% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L) and add DevEUI.(% style="display:none" %)
1385 +[[image:thingseye-io-step-2.png||height="625" width="1000"]]
1334 1334  
1335 -Search under The things network
1387 +Uplink Data converter:
1336 1336  
1337 -[[image:1653356838789-523.png||height="337" width="740"]]
1389 +* Click the Create New button if it is not selected by default.
1390 +* Click the JavaScript button.
1391 +* Paste the uplink decoder function into the text area (first, delete the default code). The demo decoder function can be found here.
1392 +* Click the Next button.
1338 1338  
1394 +[[image:thingseye-io-step-3.png||height="625" width="1000"]]
1339 1339  
1340 -After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1396 +Downlink Data converter (this is an optional step):
1341 1341  
1342 -[[image:image-20220524094909-1.png||height="335" width="729"]]
1398 +* Click the Create new button if it is not selected by default.
1399 +* Click the JavaScript button.
1400 +* Paste the downlink decoder function into the text area (first, delete the default code). The demo decoder function can be found here.
1401 +* Click the Next button.
1343 1343  
1403 +[[image:thingseye-io-step-4.png||height="625" width="1000"]]
1344 1344  
1345 -[[image:image-20220524094909-2.png||height="337" width="729"]]
1405 +Connection:
1346 1346  
1407 +* Choose Region from the Host type.
1408 +* Enter the cluster of your The Things Stack in the Region textbox.
1409 +* Enter the Username and Password in the Credentials section. Use the same username and password you created with the MQTT page of The Things Stack.
1410 +* Click Check connection to test the connection. If the connection is successful, you can see the message saying Connected.
1411 +* Click the Add button.
1347 1347  
1348 -[[image:image-20220524094909-3.png||height="338" width="727"]]
1413 +[[image:thingseye-io-step-5.png||height="625" width="1000"]]
1349 1349  
1350 1350  
1351 -[[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1416 +Your integration is added to the integrations list and it will display on the Integrations page.
1352 1352  
1418 +[[image:thingseye-io-step-6.png||height="625" width="1000"]]
1353 1353  
1354 -[[image:image-20220524094909-5.png||height="341" width="734"]]
1355 1355  
1356 -
1357 1357  == 3.6 Interface Detail ==
1358 1358  
1359 1359  === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
... ... @@ -1571,9 +1571,6 @@
1571 1571  (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
1572 1572  |(% style="background-color:#4f81bd; color:white; width:50px" %)**LEDs**|(% style="background-color:#4f81bd; color:white; width:460px" %)**Feature**
1573 1573  |**PWR**|Always on if there is power
1574 -|**SYS**|(((
1575 -After device is powered on, the SYS will **fast blink in GREEN** for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be **on GREEN for 5 seconds. **SYS will **blink Blue** on every upload and **blink Green** once receive a downlink message.
1576 -)))
1577 1577  |**TX**|(((
1578 1578  (((
1579 1579  Device boot: TX blinks 5 times.
... ... @@ -1588,20 +1588,16 @@
1588 1588  )))
1589 1589  )))
1590 1590  |**RX**|RX blinks once when receive a packet.
1591 -|**DO1**|
1592 -|**DO2**|
1593 -|**DO3**|
1594 -|**DI2**|(((
1595 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1652 +|**DO1**|For LT-22222-L: ON when DO1 is low, LOW when DO1 is high
1653 +|**DO2**|For LT-22222-L: ON when DO2 is low, LOW when DO2 is high
1654 +|**DI1**|(((
1655 +For LT-22222-L: ON when DI1 is high, LOW when DI1 is low
1596 1596  )))
1597 1597  |**DI2**|(((
1598 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1658 +For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1599 1599  )))
1600 -|**DI2**|(((
1601 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1602 -)))
1603 -|**RO1**|
1604 -|**RO2**|
1660 +|**RO1**|For LT-22222-L: ON when RO1 is closed, LOW when RO1 is open
1661 +|**RO2**|For LT-22222-L: ON when RO2 is closed, LOW when RO2 is open
1605 1605  
1606 1606  = 4. Use AT Command =
1607 1607  
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