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Last modified by Kilight Cao on 2025/07/03 15:34
From version 2.3
edited by Kilight Cao
on 2025/07/03 13:41
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To version 54.2
edited by Kilight Cao
on 2025/07/03 15:04
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Summary

Details

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Content
... ... @@ -42,12 +42,11 @@
42 42  (((
43 43  
44 44  
45 -The network diagram below illustrates how the LT-22222-L communicates with a typical LoRaWAN network.
45 +The network diagram below illustrates how the LT-22222-LA communicates with a typical LoRaWAN network.
46 46  )))
47 47  
48 -(% class="wikigeneratedid" %)
49 -[[image:lorawan-nw.jpg||height="354" width="900"]]
50 50  
49 +[[image:lorawan-nw.jpg]]
51 51  
52 52  == 1.2 Specifications ==
53 53  
... ... @@ -54,14 +54,12 @@
54 54  
55 55  (% style="color:#037691" %)**Hardware System:**
56 56  
57 -* STM32L072xxxx MCU
58 -* SX1276/78 Wireless Chip 
59 59  * Power Consumption:
60 60  ** Idle: 4mA@12V
61 61  ** 20dB Transmit: 34mA@12V
62 62  * Operating Temperature: -40 ~~ 85 Degrees, No Dew
63 63  
64 -(% style="color:#037691" %)**Interface for Model: LT22222-L:**
61 +(% style="color:#037691" %)**Interface for Model: LT22222-LA:**
65 65  
66 66  * 2 x Digital dual direction Input (Detect High/Low signal, Max: 50V, or 220V with optional external resistor)
67 67  * 2 x Digital Output (NPN output. Max pull-up voltage 36V,450mA)
... ... @@ -115,11 +115,11 @@
115 115  == 1.5 Hardware Variants ==
116 116  
117 117  
118 -(% border="1" cellspacing="3" style="width:510px" %)
119 -|(% style="background-color:#4f81bd; color:white; width:94px" %)**Model**|(% style="background-color:#4f81bd; color:white; width:172px" %)**Photo**|(% style="background-color:#4f81bd; color:white; width:244px" %)**Description**
120 -|(% style="width:94px" %)**LT-33222-L**|(% style="width:172px" %)(((
121 -[[image:lt33222-l.jpg||data-xwiki-image-style-alignment="center" height="110" width="95"]]
122 -)))|(% style="width:256px" %)(((
115 +(% border="1" cellspacing="3" style="width:531.222px" %)
116 +|(% style="background-color:#4f81bd; color:white; width:108px" %)**Model**|(% style="background-color:#4f81bd; color:white; width:158px" %)**Photo**|(% style="background-color:#4f81bd; color:white; width:261px" %)**Description**
117 +|(% style="width:108px" %)**LT-22222-LA**|(% style="width:158px" %)(((
118 + [[image:lt33222-l.jpg]]
119 +)))|(% style="width:261px" %)(((
123 123  * 3 x Digital Input (Bi-direction)
124 124  * 3 x Digital Output
125 125  * 2 x Relay Output (5A@250VAC / 30VDC)
... ... @@ -143,7 +143,7 @@
143 143  == 2.2 Terminals ==
144 144  
145 145  
146 -The  LT-22222-L has two screw terminal blocks. The upper screw terminal block has 6 screw terminals and the lower screw terminal block has 10 screw terminals.
143 +The  LT-22222-LA has two screw terminal blocks. The upper screw terminal block has 6 screw terminals and the lower screw terminal block has 10 screw terminals.
147 147  
148 148  **Upper screw terminal block (from left to right):**
149 149  
... ... @@ -171,43 +171,42 @@
171 171  |(% style="width:125px" %)DO2|(% style="width:128px" %)Digital Output 2
172 172  |(% style="width:125px" %)DO1|(% style="width:128px" %)Digital Output 1
173 173  
174 -== 2.3 Connecting LT-22222-L to a Power Source ==
171 +== 2.3 Connecting LT-22222-LA to a Power Source ==
175 175  
176 176  
177 177  The LT-22222-L I/O Controller can be powered by a **7–24V DC** power source. Connect your power supply’s **positive wire** to the **VIN** and the **negative wire** to the **GND** screw terminals. The power indicator **(PWR) LED** will turn on when the device is properly powered.
178 178  
179 179  {{warning}}
180 -**We recommend that you power on the LT-22222-L after adding its registration information to the LoRaWAN network server. Otherwise, the device will continuously send join-request messages to attempt to join a LoRaWAN network but will fail.**
177 +**We recommend that you power on the LT-22222-LA after adding its registration information to the LoRaWAN network server. Otherwise, the device will continuously send join-request messages to attempt to join a LoRaWAN network but will fail.**
181 181  {{/warning}}
182 182  
183 -
184 184  [[image:1653297104069-180.png]]
185 185  
186 186  
187 -= 3. Registering LT-22222-L with a LoRaWAN Network Server =
188 188  
184 += 3. Registering LT-22222-LA with a LoRaWAN Network Server =
189 189  
190 -The LT-22222-L supports both OTAA (Over-the-Air Activation) and ABP (Activation By Personalization) methods to activate with a LoRaWAN Network Server. However, OTAA is the most secure method for activating a device with a LoRaWAN Network Server. OTAA regenerates session keys upon initial registration and regenerates new session keys after any subsequent reboots. By default, the LT-22222-L is configured to operate in LoRaWAN Class C mode.
191 191  
187 +The LT-22222-LA supports both OTAA (Over-the-Air Activation) and ABP (Activation By Personalization) methods to activate with a LoRaWAN Network Server. However, OTAA is the most secure method for activating a device with a LoRaWAN Network Server. OTAA regenerates session keys upon initial registration and regenerates new session keys after any subsequent reboots. By default, the LT-22222-LA is configured to operate in LoRaWAN Class C mode.
192 192  
189 +
193 193  == 3.1 Prerequisites ==
194 194  
195 195  
196 -The LT-22222-L comes with device registration information such as DevEUI, AppEUI, and AppKey which allows you to register it with a LoRaWAN network. This 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.
193 +The LT-22222-LA comes with device registration information such as DevEUI, AppEUI, and AppKey which allows you to register it with a LoRaWAN network. This 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.
197 197  
198 -[[image:image-20230425173427-2.png||height="246" width="530"]]
199 -
200 200  {{info}}
201 201  If you are unable to set the provided root key and other identifiers in the network server, you must generate new keys and identifiers with the network server and configure the device with them using AT commands.
202 202  {{/info}}
203 203  
204 -The following subsections explain how to register the LT-22222-L with different LoRaWAN network server providers.
199 +The following subsections explain how to register the LT-22222-LA with different LoRaWAN network server providers.
205 205  
201 +[[image:image-20230425173427-2.png]]
206 206  
207 207  == 3.2 The Things Stack ==
208 208  
209 209  
210 -This section guides you through how to register your LT-22222-L with The Things Stack Sandbox.
206 +This section guides you through how to register your LT-22222-LA with The Things Stack Sandbox.
211 211  
212 212  {{info}}
213 213  The Things Stack Sandbox was formally called The Things Stack Community Edition.
... ... @@ -214,11 +214,10 @@
214 214  {{/info}}
215 215  
216 216  
217 -The network diagram below illustrates the connection between the LT-22222-L and The Things Stack, as well as how the data can be integrated with the ThingsEye IoT platform.
213 +The network diagram below illustrates the connection between the LT-22222-LA and The Things Stack, as well as how the data can be integrated with the ThingsEye IoT platform.
218 218  
215 +[[image:1751523649311-511.png||height="407" width="1378"]]
219 219  
220 -[[image:dragino-lorawan-nw-lt-22222-n.jpg||height="374" width="1400"]]
221 -
222 222  {{info}}
223 223   You can use a LoRaWAN gateway, such as the [[Dragino LPS8N>>https://www.dragino.com/products/lora-lorawan-gateway/item/200-lps8n.html]], to expand or create LoRaWAN coverage in your area.
224 224  {{/info}}
... ... @@ -253,7 +253,7 @@
253 253  ** Enter the **AppEUI** in the **JoinEUI** field and click the **Confirm** button. If The Things Stack accepts the JoinEUI you provided, it will display the message 'This end device can be registered on the network'.
254 254  ** In the **DevEUI** field, enter the **DevEUI**.
255 255  ** In the **AppKey** field, enter the **AppKey.**
256 -** In the **End device ID** field, enter a unique name for your LT-22222-L within this application.
251 +** In the **End device ID** field, enter a unique name for your LT-22222-LA within this application.
257 257  ** Under **After registration**, select the **View registered end device** option.
258 258  ** Click **Register end device** button.
259 259  
... ... @@ -284,7 +284,7 @@
284 284  ** Enter the **AppEUI** in the **JoinEUI** field and click the **Confirm** button. If The Things Stack accepts the JoinEUI you provided, it will display the message '//**This end device can be registered on the network**//'
285 285  ** In the **DevEUI** field, enter the **DevEUI**.
286 286  ** In the **AppKey** field, enter the **AppKey**.
287 -** In the **End device ID** field, enter a unique name for your LT-22222-N within this application.
282 +** In the **End device ID** field, enter a unique name for your LT-22222-LA within this application.
288 288  ** Under **After registration**, select the **View registered end device** option.
289 289  ** Click the **Register end device** button.
290 290  
... ... @@ -293,25 +293,25 @@
293 293  
294 294  You will be navigated to the **Device overview** page.
295 295  
296 -
297 297  [[image:lt-22222-device-overview.png]]
298 298  
299 299  
294 +
300 300  === 3.2.2 Joining ===
301 301  
302 302  
303 -On the end device's page (in this case, lt-22222-l), click on **Live data** tab. The Live data panel for your device will display. Initially, it is blank.
298 +On the end device's page (in this case, lt-22222-la), click on **Live data** tab. The Live data panel for your device will display. Initially, it is blank.
304 304  
305 -Now power on your LT-22222-L. The **TX LED** will **fast-blink 5 times** which means the LT-22222-L will enter the **work mode** and start to **join** The Things Stack network server. The **TX LED** will be on for **5 seconds** after joining the network. In the **Live data** panel, you can see the **join-request** and **join-accept** messages exchanged between the device and the network server.
300 +Now power on your LT-22222-LA. The **TX LED** will **fast-blink 5 times** which means the LT-22222-LA will enter the **work mode** and start to **join** The Things Stack network server. The **TX LED** will be on for **5 seconds** after joining the network. In the **Live data** panel, you can see the **join-request** and **join-accept** messages exchanged between the device and the network server.
306 306  
307 -
308 308  [[image:lt-22222-l-joining.png]]
309 309  
310 310  
305 +
311 311  === 3.2.3 Uplinks ===
312 312  
313 313  
314 -After successfully joining, the device will send its first **uplink data message** to The Things Stack application it belongs to (in this example, it is **dragino-docs**). When the LT-22222-L sends an uplink message to the server, the **TX LED** turns on for **1 second**. By default, you will receive an uplink data message from the device every 10 minutes.
309 +After successfully joining, the device will send its first **uplink data message** to The Things Stack application it belongs to (in this example, it is **dragino-docs**). When the LT-22222-LA sends an uplink message to the server, the **TX LED** turns on for **1 second**. By default, you will receive an uplink data message from the device every 10 minutes.
315 315  
316 316  Click on one of the **Forward uplink data messages **to see its payload content. The payload content is encapsulated within the **decode_payload {}** JSON object.
317 317  
... ... @@ -329,7 +329,6 @@
329 329  
330 330  We have written a payload formatter that resolves some decoding issues present in The Things Stack Device Repository payload formatter. You can add it under the **Custom JavaScript formatter**. It can be found [[here>>https://github.com/dragino/dragino-end-node-decoder/blob/main/LT22222-L/v1.6_decoder_ttn%20.txt]]:
331 331  
332 -(% class="wikigeneratedid" %)
333 333  [[image:lt-22222-l-js-custom-payload-formatter.png]]
334 334  
335 335  
... ... @@ -342,7 +342,7 @@
342 342  == 3.3 Working Modes and Uplink Payload formats ==
343 343  
344 344  
345 -The LT-22222-L has 5 **working modes**. It also has an interrupt/trigger mode for different types of applications that can be used together with any working mode as an additional feature. The default mode is MOD1 and you can switch between these modes using AT commands.
339 +The LT-22222-LA has 5 **working modes**. It also has an interrupt/trigger mode for different types of applications that can be used together with any working mode as an additional feature. The default mode is MOD1 and you can switch between these modes using AT commands.
346 346  
347 347  * (% style="color:blue" %)**MOD1**(%%): (default mode/factory set): 2ACI + 2AVI + DI + DO + RO
348 348  
... ... @@ -395,7 +395,7 @@
395 395  * DI is for digital input. DIx=1: HIGH or FLOATING, DIx=0: LOW.
396 396  * DO is for reverse digital output. DOx=1: LOW, DOx=0: HIGH or FLOATING.
397 397  
398 -(% style="color:red" %)**Note: DI3 and DO3 bits are not valid for LT-22222-L**
392 +(% style="color:red" %)**Note: DI3 and DO3 bits are not valid for LT-22222-LA**
399 399  
400 400  For example, if the payload is: [[image:image-20220523175847-2.png]]
401 401  
... ... @@ -414,13 +414,13 @@
414 414  
415 415  * [1] The RO1 relay channel is CLOSED, and the RO1 LED is ON.
416 416  * [0] The RO2 relay channel is OPEN, and the RO2 LED is OFF.
417 -* **[1] DI3 - not used for LT-22222-L.**
411 +* **[1] DI3 - not used for LT-22222-LA.**
418 418  * [0] DI2 channel input is LOW, and the DI2 LED is OFF.
419 419  * [1] DI1 channel input state:
420 420  ** DI1 is FLOATING when no sensor is connected between DI1+ and DI1-.
421 421  ** DI1 is HIGH when a sensor is connected between DI1- and DI1+ and the sensor is ACTIVE.
422 422  ** DI1 LED is ON in both cases.
423 -* **[0] DO3 - not used for LT-22222-L.**
417 +* **[0] DO3 - not used for LT-22222-LA.**
424 424  * [1] DO2 channel output is LOW, and the DO2 LED is ON.
425 425  * [0] DO1 channel output state:
426 426  ** DO1 is FLOATING when there is no load between DO1 and V+.
... ... @@ -436,7 +436,7 @@
436 436  
437 437  
438 438  (((
439 -**For LT-22222-L**: In this mode, **DI1 and DI2** are used as counting pins.
433 +**For LT-22222-LA**: In this mode, **DI1 and DI2** are used as counting pins.
440 440  )))
441 441  
442 442  (((
... ... @@ -467,7 +467,7 @@
467 467  * DO is for reverse digital output. DOx=1: LOW, DOx=0: HIGH or FLOATING.
468 468  
469 469  (((
470 -(% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L**
464 +(% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-LA**
471 471  
472 472  
473 473  )))
... ... @@ -492,7 +492,7 @@
492 492  )))
493 493  
494 494  (((
495 -**For LT22222-L:**
489 +**For LT22222-LA:**
496 496  
497 497  (% style="color:blue" %)**AT+TRIG1=0,100**(%%)** (sets the DI1 port to trigger on a LOW level. The valid signal duration is 100ms) **
498 498  
... ... @@ -510,6 +510,8 @@
510 510  
511 511  
512 512  
507 +
508 +
513 513  === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
514 514  
515 515  
... ... @@ -517,7 +517,7 @@
517 517  The maximum count for four bytes is FFFFFFFF (hex) = 4294967295 (dec).
518 518  It starts counting again when it reaches the maximum value.**
519 519  
520 -**LT22222-L**: In this mode, the DI1 is used as a counting pin.
516 +**LT22222-LA**: In this mode, the DI1 is used as a counting pin.
521 521  
522 522  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
523 523  |(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**4**|(% 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**
... ... @@ -540,12 +540,14 @@
540 540  * DO is for reverse digital output. DOx=1: output low, DOx=0: high or floating.
541 541  
542 542  (((
543 -(% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
539 +(% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-LA.**
544 544  )))
545 545  
546 546  
547 547  
548 548  
545 +
546 +
549 549  (((
550 550  **To activate this mode, run the following AT commands:**
551 551  )))
... ... @@ -575,7 +575,7 @@
575 575  
576 576  
577 577  (((
578 -**LT22222-L**: In this mode, the DI1 is used as a counting pin.
576 +**LT22222-LA**: In this mode, the DI1 is used as a counting pin.
579 579  )))
580 580  
581 581  (((
... ... @@ -638,6 +638,8 @@
638 638  
639 639  
640 640  
639 +
640 +
641 641  === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
642 642  
643 643  
... ... @@ -675,7 +675,7 @@
675 675  )))
676 676  
677 677  (((
678 -(% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
678 +(% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-LA.**
679 679  )))
680 680  
681 681  (((
... ... @@ -698,6 +698,8 @@
698 698  
699 699  
700 700  
701 +
702 +
701 701  === 3.3.6 AT+ADDMOD~=6 (Trigger Mode, Optional) ===
702 702  
703 703  
... ... @@ -708,7 +708,7 @@
708 708  * **AT+MOD=1 ** **~-~->**  Sets the default working mode
709 709  * **AT+ADDMOD6=1**   **~-~->**  Enables trigger mode
710 710  
711 -The LT-22222-L will continuously monitor AV1, AV2, AC1, and AC2 every 5 seconds. It will send uplink packets in two cases:
713 +The LT-22222-LA will continuously monitor AV1, AV2, AC1, and AC2 every 5 seconds. It will send uplink packets in two cases:
712 712  
713 713  1. Periodic uplink: Based on TDC time. The payload is the same as in normal mode (MOD=1 as set above). These are (% style="color:#4f81bd" %)**unconfirmed**(%%) uplinks.
714 714  1. (((
... ... @@ -890,11 +890,11 @@
890 890  )))
891 891  
892 892  
893 -== 3.4 ​Configure LT-22222-L via AT Commands or Downlinks ==
895 +== 3.4 ​Configure LT-22222-LA via AT Commands or Downlinks ==
894 894  
895 895  
896 896  (((
897 -You can configure LT-22222-L I/O Controller via AT Commands or LoRaWAN Downlinks.
899 +You can configure LT-22222-LA I/O Controller via AT Commands or LoRaWAN Downlinks.
898 898  )))
899 899  
900 900  (((
... ... @@ -919,7 +919,7 @@
919 919  === 3.4.2 Sensor-related commands ===
920 920  
921 921  
922 -These commands are specially designed for the LT-22222-L. Commands can be sent to the device using options such as an AT command or a LoRaWAN downlink payload.
924 +These commands are specially designed for the LT-22222-LA. Commands can be sent to the device using options such as an AT command or a LoRaWAN downlink payload.
923 923  
924 924  
925 925  ==== 3.4.2.1 Set Transmit/Uplink Interval ====
... ... @@ -966,7 +966,7 @@
966 966  
967 967  See [[RapidTables>>https://www.rapidtables.com/convert/number/decimal-to-hex.html?x=30]]
968 968  
969 -[[image:Screenshot 2024-11-23 at 18.27.11.png]]
971 +[[image:Screenshot%202024-11-23%20at%2018.27.11.png||alt="Screenshot 2024-11-23 at 18.27.11.png"]]
970 970  )))
971 971  
972 972  ==== 3.4.2.2 Set the Working Mode (AT+MOD) ====
... ... @@ -1030,7 +1030,7 @@
1030 1030  ==== 3.4.2.3 Request an uplink from the device ====
1031 1031  
1032 1032  
1033 -Requests an uplink from LT-22222-L. The content of the uplink payload varies based on the device's current working mode.
1035 +Requests an uplink from LT-22222-LA. The content of the uplink payload varies based on the device's current working mode.
1034 1034  
1035 1035  (% style="color:#037691" %)**AT command**
1036 1036  
... ... @@ -1571,7 +1571,7 @@
1571 1571  
1572 1572  (% style="color:#4f81bd" %)**Third byte (bb)**(%%): Control Method and Ports status:
1573 1573  
1574 -[[image:image-20221008095908-1.png||height="364" width="564"]]
1576 +[[image:image-20221008095908-1.png]]
1575 1575  
1576 1576  
1577 1577  (% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh bytes (cc)**(%%): Latching time. Unit: ms
... ... @@ -2022,7 +2022,7 @@
2022 2022  
2023 2023  We use The Things Stack Sandbox in this example:
2024 2024  
2025 -* In **The Things Stack Sandbox**, go to the **Application **for the LT-22222-L you added.
2027 +* In **The Things Stack Sandbox**, go to the **Application **for the LT-22222-LA you added.
2026 2026  * Select **MQTT** under **Integrations** in the left menu.
2027 2027  * In the **Connection information **section, under **Connection credentials**, The Things Stack displays an auto-generated **username**. You can use it or provide a new one.
2028 2028  * Click the **Generate new API key** button to generate a password. You can view it by clicking on the **visibility toggle/eye** icon. The API key works as the password.
... ... @@ -2143,7 +2143,7 @@
2143 2143  ==== 3.5.2.4 Viewing sensor data on a dashboard ====
2144 2144  
2145 2145  
2146 -You can create a dashboard with ThingsEye to visualize the sensor data coming from the LT-22222-L. The following image shows a dashboard created for the LT-22222-L. See **Creating a dashboard** in ThingsEye documentation for more information.
2148 +You can create a dashboard with ThingsEye to visualize the sensor data coming from the LT-22222-LA. The following image shows a dashboard created for the LT-22222-LA. See **Creating a dashboard** in ThingsEye documentation for more information.
2147 2147  
2148 2148  [[image:lt-22222-l-dashboard.png]]
2149 2149  
... ... @@ -2162,18 +2162,17 @@
2162 2162  
2163 2163  
2164 2164  (((
2165 -The DI ports of the LT-22222-L can support **NPN**, **PNP**, or **dry contact** output sensors.
2167 +The DI ports of the LT-22222-LA can support **NPN**, **PNP**, or **dry contact** output sensors.
2166 2166  )))
2167 2167  
2168 2168  (((
2169 2169  (((
2170 -The part of the internal circuit of the LT-22222-L shown below includes the NEC2501 photocoupler. The active current from NEC2501 pin 1 to pin 2 is 1 mA, with a maximum allowable current of 50 mA. When active current flows from NEC2501 pin 1 to pin 2, the DI becomes active HIGH and the DI LED status changes.
2172 +The part of the internal circuit of the LT-22222-LA shown below includes the NEC2501 photocoupler. The active current from NEC2501 pin 1 to pin 2 is 1 mA, with a maximum allowable current of 50 mA. When active current flows from NEC2501 pin 1 to pin 2, the DI becomes active HIGH and the DI LED status changes.
2171 2171  
2172 -
2174 +[[image:1653357170703-587.png]]
2173 2173  )))
2174 2174  )))
2175 2175  
2176 -[[image:1653357170703-587.png]]
2177 2177  
2178 2178  (((
2179 2179  (((
... ... @@ -2205,11 +2205,11 @@
2205 2205  )))
2206 2206  
2207 2207  (((
2208 -[[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
2209 +**= DI1**+** / 1K.**
2209 2209  )))
2210 2210  
2211 2211  (((
2212 -For example, if** DI1+ **= **12V**, the resulting current is [[image:1653968155772-850.png||height="23" width="19"]]= 12mA. Therefore, the LT-22222-L will be able to detect this active signal.
2213 +For example, if** DI1+ **= **12V**, the resulting current is = 12mA. Therefore, the LT-22222-L will be able to detect this active signal.
2213 2213  )))
2214 2214  
2215 2215  (((
... ... @@ -2236,11 +2236,11 @@
2236 2236  )))
2237 2237  
2238 2238  (((
2239 -[[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
2240 +**= DI1+ / 1K.**
2240 2240  )))
2241 2241  
2242 2242  (((
2243 -If **DI1+ = 24V**, the resulting current[[image:1653968155772-850.png||height="23" width="19"]] is 24mA, Therefore, the LT-22222-L will detect this high-active signal.
2244 +If **DI1+ = 24V**, the resulting current is 24mA, Therefore, the LT-22222-L will detect this high-active signal.
2244 2244  )))
2245 2245  
2246 2246  (((
... ... @@ -2267,16 +2267,18 @@
2267 2267  )))
2268 2268  
2269 2269  (((
2270 - [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
2271 + **= DI1+ / 51K.**
2271 2271  )))
2272 2272  
2273 2273  (((
2274 -If the sensor output is 220V, then [[image:1653968155772-850.png||height="23" width="19"]](% wfd-invisible="true" id="cke_bm_243359S" style="display:none" %)[[image:image-20220524095628-8.png]](%%) = DI1+ / 51K  = 4.3mA. Therefore, the LT-22222-L will be able to safely detect this high-active signal.
2275 +If the sensor output is 220V, then (% wfd-invisible="true" id="cke_bm_243359S" style="display:none" %)[[image:image-20220524095628-8.png]](%%) = DI1+ / 51K  = 4.3mA. Therefore, the LT-22222-L will be able to safely detect this high-active signal.
2275 2275  )))
2276 2276  
2277 2277  
2278 2278  
2279 2279  
2281 +
2282 +
2280 2280  (% style="color:blue" %)**Example 4**(%%): Connecting to a Dry Contact sensor
2281 2281  
2282 2282  From the DI port circuit above, activating the photocoupler requires a voltage difference between the DI+ and DI- ports. However, the Dry Contact sensor is a passive component and cannot provide this voltage difference on its own.
... ... @@ -2287,9 +2287,9 @@
2287 2287  
2288 2288  (% style="color:blue" %)**Example 5**(%%): Connecting to an Open Collector
2289 2289  
2293 +
2290 2290  [[image:image-20240219115718-1.png]]
2291 2291  
2292 -
2293 2293  === 3.6.3 Digital Output Ports: DO1/DO2 ===
2294 2294  
2295 2295  
... ... @@ -2303,7 +2303,7 @@
2303 2303  === 3.6.4 Analog Input Interfaces ===
2304 2304  
2305 2305  
2306 -The analog input interface is shown below. The LT-22222-L will measure the IN2 voltage to calculate the current passing through the load. The formula is:
2309 +The analog input interface is shown below. The LT-22222-LA will measure the IN2 voltage to calculate the current passing through the load. The formula is:
2307 2307  
2308 2308  
2309 2309  (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
... ... @@ -2327,16 +2327,16 @@
2327 2327  
2328 2328  [[image:1653357640609-758.png]]
2329 2329  
2330 -[[image:1653357648330-671.png||height="155" width="733"]]
2333 +[[image:1653357648330-671.png]]
2331 2331  
2332 2332  
2333 2333  Example: Connecting to a regulated power supply to measure voltage
2334 2334  
2335 -[[image:image-20230608101532-1.png||height="606" width="447"]]
2338 +[[image:image-20230608101532-1.png]]
2336 2336  
2337 -[[image:image-20230608101608-2.jpeg||height="379" width="284"]]
2340 +[[image:image-20230608101608-2.jpeg]]
2338 2338  
2339 -[[image:image-20230608101722-3.png||height="102" width="1139"]]
2342 +[[image:image-20230608101722-3.png]]
2340 2340  
2341 2341  
2342 2342  (% style="color:blue; font-weight:bold" %)**Specifications of the regulated power supply**(% style="color:blue" %)**:**
... ... @@ -2350,15 +2350,15 @@
2350 2350  
2351 2351  
2352 2352  (((
2353 -The LT-22222-L has two relay interfaces, RO1 and RO2, each using two pins of the screw terminal (ROx-1 and ROx-2 where x is the port number, 1 or 2). You can connect a device's power line in series with one of the relay interfaces (e.g., RO1-1 and RO1-2 screw terminals). See the example below:
2356 +The LT-22222-LA has two relay interfaces, RO1 and RO2, each using two pins of the screw terminal (ROx-1 and ROx-2 where x is the port number, 1 or 2). You can connect a device's power line in series with one of the relay interfaces (e.g., RO1-1 and RO1-2 screw terminals). See the example below:
2354 2354  
2355 -(% style="color:red" %)**Note:**(%%) The ROx pins will be in the Open (NO) state when the LT-22222-L is powered off.
2358 +(% style="color:red" %)**Note:**(%%) The ROx pins will be in the Open (NO) state when the LT-22222-LA is powered off.
2356 2356  )))
2357 2357  
2358 2358  [[image:image-20220524100215-9.png]]
2359 2359  
2363 +[[image:image-20220524100215-10.png]]
2360 2360  
2361 -[[image:image-20220524100215-10.png||height="382" width="723"]]
2362 2362  
2363 2363  
2364 2364  == 3.7 LED Indicators ==
... ... @@ -2383,36 +2383,36 @@
2383 2383  )))
2384 2384  )))
2385 2385  |**RX**|RX blinks once when a packet is received.
2386 -|**DO1**|For LT-22222-L: ON when DO1 is low, OFF when DO1 is high
2387 -|**DO2**|For LT-22222-L: ON when DO2 is low, OFF when DO2 is high
2389 +|**DO1**|For LT-22222-LA: ON when DO1 is low, OFF when DO1 is high
2390 +|**DO2**|For LT-22222-LA: ON when DO2 is low, OFF when DO2 is high
2388 2388  |**DI1**|(((
2389 -For LT-22222-L: ON when DI1 is high, OFF when DI1 is low
2392 +For LT-22222-LA: ON when DI1 is high, OFF when DI1 is low
2390 2390  )))
2391 2391  |**DI2**|(((
2392 -For LT-22222-L: ON when DI2 is high, OFF when DI2 is low
2395 +For LT-22222-LA: ON when DI2 is high, OFF when DI2 is low
2393 2393  )))
2394 -|**RO1**|For LT-22222-L: ON when RO1 is closed, OFF when RO1 is open
2395 -|**RO2**|For LT-22222-L: ON when RO2 is closed, OFF when RO2 is open
2397 +|**RO1**|For LT-22222-LA: ON when RO1 is closed, OFF when RO1 is open
2398 +|**RO2**|For LT-22222-LA: ON when RO2 is closed, OFF when RO2 is open
2396 2396  
2397 2397  = 4. Using AT Commands =
2398 2398  
2399 2399  
2400 -The LT-22222-L supports programming using AT Commands.
2403 +The LT-22222-LA supports programming using AT Commands.
2401 2401  
2402 2402  
2403 -== 4.1 Connecting the LT-22222-L to a PC ==
2406 +== 4.1 Connecting the LT-22222-LA to a PC ==
2404 2404  
2405 2405  
2406 2406  (((
2407 -You can use a USB-to-TTL adapter/converter along with a 3.5mm Program Cable to connect the LT-22222-L to a PC, as shown below.
2410 +You can use a USB-to-TTL adapter/converter along with a 3.5mm Program Cable to connect the LT-22222-LA to a PC, as shown below.
2408 2408  
2409 -[[image:usb-ttl-audio-jack-connection.jpg]]
2412 +(% title="Click and drag to resize" %)​​[[image:1751525987713-642.png]]​
2410 2410  
2411 2411  
2412 2412  )))
2413 2413  
2414 2414  (((
2415 -On the PC, you need to set the (% style="color:#4f81bd" %)**serial tool **(%%)(such as [[PuTTY>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]] or [[SecureCRT>>https://www.vandyke.com/cgi-bin/releases.php?product=securecrt]]) to a baud rate of (% style="color:green" %)**9600**(%%) to access the serial console of LT-22222-L. Access to AT commands is disabled by default, and a password (default: (% style="color:green" %)**123456**)(%%) must be entered to enable AT command access, as shown below:
2418 +On the PC, you need to set the (% style="color:#4f81bd" %)**serial tool **(%%)(such as [[PuTTY>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]] or [[SecureCRT>>https://www.vandyke.com/cgi-bin/releases.php?product=securecrt]]) to a baud rate of (% style="color:green" %)**9600**(%%) to access the serial console of LT-22222-LA. Access to AT commands is disabled by default, and a password (default: (% style="color:green" %)**123456**)(%%) must be entered to enable AT command access, as shown below:
2416 2416  )))
2417 2417  
2418 2418  [[image:1653358355238-883.png]]
... ... @@ -2419,13 +2419,13 @@
2419 2419  
2420 2420  
2421 2421  (((
2422 -== 4.2 LT-22222-L related AT commands ==
2425 +== 4.2 LT-22222-LA related AT commands ==
2423 2423  
2424 2424  
2425 2425  )))
2426 2426  
2427 2427  (((
2428 -The following is the list of all the AT commands related to the LT-22222-L, except for those used for switching between working modes.
2431 +The following is the list of all the AT commands related to the LT-22222-LA, except for those used for switching between working modes.
2429 2429  
2430 2430  * **##AT##+<CMD>?** : Help on <CMD>
2431 2431  * **##AT##+<CMD>** : Run <CMD>
... ... @@ -2522,85 +2522,11 @@
2522 2522  )))
2523 2523  
2524 2524  
2525 -=== 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
2526 -
2527 2527  (((
2528 2528  
2529 -
2530 -(((
2531 -(% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter the password to enable AT commands access
2532 2532  )))
2533 -)))
2534 2534  
2535 -(((
2536 -(% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset parameters to Factory Default, Reserve keys
2537 -)))
2538 2538  
2539 -(((
2540 -(% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter the password to enable AT command access
2541 -)))
2542 -
2543 -(((
2544 -(% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to CLASS C mode
2545 -)))
2546 -
2547 -(((
2548 -(% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
2549 -)))
2550 -
2551 -(((
2552 -(% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
2553 -)))
2554 -
2555 -(((
2556 -(% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
2557 -)))
2558 -
2559 -(((
2560 -(% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
2561 -)))
2562 -
2563 -(((
2564 -(% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4 MHz
2565 -)))
2566 -
2567 -(((
2568 -(% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2 frequency to 868.4 MHz (according to the result from the server)
2569 -)))
2570 -
2571 -(((
2572 -(% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2 DR to match the downlink DR from the server. See below.
2573 -)))
2574 -
2575 -(((
2576 -(% style="background-color:#dcdcdc" %)** AT+DADDR=26 01 1A F1** (%%) ~/~/ Set Device Address. The Device Address can be found in the application on the LoRaWAN NS.
2577 -)))
2578 -
2579 -(((
2580 -(% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
2581 -
2582 -
2583 -)))
2584 -
2585 -(((
2586 -(% style="color:red" %)**Note:**
2587 -)))
2588 -
2589 -(((
2590 -**~1. Ensure that the device is set to ABP mode in the LoRaWAN Network Server.**
2591 -
2592 -**2. Verify that the LG01/02 gateway RX frequency matches the AT+CHS setting exactly.**
2593 -
2594 -**3. Make sure the SF/bandwidth settings in the LG01/LG02 match the settings of AT+DR. Refer to [[this link>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
2595 -
2596 -**4. The commands AT+RX2FQ and AT+RX2DR enable downlink functionality. To set the correct parameters, you can check the actual downlink parameters to be used as shown below. Here, RX2FQ should be set to 868400000 and RX2DR should be set to 5.**
2597 -)))
2598 -
2599 -(((
2600 -[[image:1653359097980-169.png||height="188" width="729"]]
2601 -)))
2602 -
2603 -
2604 2604  === 4.2.3 Change to Class A ===
2605 2605  
2606 2606  
... ... @@ -2649,7 +2649,6 @@
2649 2649  
2650 2650  Below is the hardware setup for uploading a firmware image to the LT-22222-L:
2651 2651  
2652 -[[image:usb-ttl-audio-jack-connection.jpg]]
2653 2653  
2654 2654  
2655 2655  
... ... @@ -2665,18 +2665,14 @@
2665 2665  
2666 2666  )))
2667 2667  
2668 - [[image:image-20220524103407-12.png]]
2669 2669  
2670 2670  
2671 -[[image:image-20220524103429-13.png]]
2672 2672  
2673 2673  
2674 -[[image:image-20220524104033-15.png]]
2675 2675  
2676 2676  
2677 2677  (% style="color:red" %)**Note**(%%): If you have lost the programming cable, you can make one from a 3.5 mm cable. The pin mapping is as follows:
2678 2678  
2679 -[[image:1653360054704-518.png||height="186" width="745"]]
2680 2680  
2681 2681  
2682 2682  (((
... ... @@ -2716,7 +2716,7 @@
2716 2716  (((
2717 2717  (% style="color:#0000ff" %)**Step 1**(%%): Log in to The Things Stack Sandbox account and create an ABP device in the application. To do this, use the manual registration option as explained in section 3.2.2.2, //Adding a Device Manually//. Select //Activation by Personalization (ABP)// under Activation Mode. Enter the DevEUI exactly as shown on the registration information sticker, then generate the Device Address, Application Session Key (AppSKey), and Network Session Key (NwkSKey).
2718 2718  
2719 -[[image:lt-22222-l-abp.png||height="686" width="1000"]]
2643 +
2720 2720  )))
2721 2721  
2722 2722  (((
... ... @@ -2765,7 +2765,6 @@
2765 2765  (% style="color:#000000; font-family:Arial,sans-serif; font-size:11pt; font-style:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-position:normal; font-weight:400; text-decoration:none; white-space:pre-wrap" %)The following figure shows the screenshot of the command set above, issued using a serial tool:
2766 2766  )))
2767 2767  
2768 -[[image:1653360498588-932.png||height="485" width="726"]]
2769 2769  
2770 2770  
2771 2771  == 6.4 How to change the uplink interval? ==
... ... @@ -2781,16 +2781,11 @@
2781 2781  You can run the AT command **AT+DEBUG** to view the counting event in the serial output. If the firmware is too old and doesn’t support AT+DEBUG, update to the latest firmware first.
2782 2782  
2783 2783  
2784 -== 6.6 Can I use point-to-point communication with LT-22222-L? ==
2785 -
2786 -
2787 -Yes, you can. Please refer to the [[Point-to-Point Communication of LT-22222-L>>https://wiki.dragino.com/xwiki/bin/view/Main/%20Point%20to%20Point%20Communication%20of%20LT-22222-L/]] page. The firmware that supports point-to-point communication can be found [[here>>https://github.com/dragino/LT-22222-L/releases]].
2788 -
2789 2789  
2790 2790  )))
2791 2791  
2792 2792  (((
2793 -== 6.7 Why does the relay output default to an open relay after the LT-22222-L is powered off? ==
2711 +== 6.6 Why does the relay output default to an open relay after the LT-22222-LA is powered off? ==
2794 2794  
2795 2795  
2796 2796  * If the device is not properly shut down and is directly powered off.
... ... @@ -2798,24 +2798,19 @@
2798 2798  * In modes 2 to 5, the DO/RO status and pulse count are saved to flash memory.
2799 2799  * After a restart, the status before the power failure will be read from Flash.
2800 2800  
2801 -== 6.8 Can I set up LT-22222-L as an NC (Normally Closed) relay? ==
2719 +== 6.7 Can I set up LT-22222-LA as an NC (Normally Closed) relay? ==
2802 2802  
2803 2803  
2804 -The LT-22222-L's built-in relay is Normally Open (NO). You can use an external relay to achieve a Normally Closed (NC) configuration. The circuit diagram is shown below:
2722 +The LT-22222-LA's built-in relay is Normally Open (NO). You can use an external relay to achieve a Normally Closed (NC) configuration. The circuit diagram is shown below:
2805 2805  
2724 +[[image:image-20221006170630-1.png]]
2806 2806  
2807 -[[image:image-20221006170630-1.png||height="610" width="945"]]
2808 2808  
2809 2809  
2810 -== 6.9 Can the LT-22222-L save the RO state? ==
2811 2811  
2729 +== 6.9 Why does the LT-22222-LA always report 15.585V when measuring the AVI? ==
2812 2812  
2813 -To enable this feature, the firmware version must be 1.6.0 or higher.
2814 2814  
2815 -
2816 -== 6.10 Why does the LT-22222-L always report 15.585V when measuring the AVI? ==
2817 -
2818 -
2819 2819  It is likely that the GND is not connected during the measurement, or that the wire connected to the GND is loose.
2820 2820  
2821 2821  
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