Last modified by Saxer Lin on 2025/04/15 17:24
<
From version < 101.1 >
edited by Bei Jinggeng
on 2022/10/08 09:59
To version < 102.1 >
edited by Bei Jinggeng
on 2022/10/28 17:08
>
Change comment: There is no comment for this version

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... ... @@ -21,8 +21,10 @@
21 21  (((
22 22  
23 23  
24 +(((
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  )))
27 +)))
26 26  
27 27  (((
28 28  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, smartphone detection, building automation, and so on.
... ... @@ -214,7 +214,9 @@
214 214  = 2. Power ON Device =
215 215  
216 216  
219 +(((
217 217  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.
221 +)))
218 218  
219 219  (((
220 220  PWR will on when device is properly powered.
... ... @@ -273,12 +273,12 @@
273 273  
274 274  Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
275 275  
276 -Add APP EUI in the application.
280 +**Add APP EUI in the application.**
277 277  
278 278  [[image:1653297955910-247.png||height="321" width="716"]]
279 279  
280 280  
281 -Add APP KEY and DEV EUI
285 +**Add APP KEY and DEV EUI**
282 282  
283 283  [[image:1653298023685-319.png]]
284 284  
... ... @@ -286,6 +286,8 @@
286 286  
287 287  (((
288 288  (% 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.
293 +
294 +
289 289  )))
290 290  
291 291  [[image:1653298044601-602.png||height="405" width="709"]]
... ... @@ -308,7 +308,9 @@
308 308  === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
309 309  
310 310  
317 +(((
311 311  The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
319 +)))
312 312  
313 313  [[image:image-20220523174024-3.png]]
314 314  
... ... @@ -360,11 +360,12 @@
360 360  ** DO1 LED is off in both case
361 361  
362 362  
363 -
364 364  === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
365 365  
366 366  
374 +(((
367 367  **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
376 +)))
368 368  
369 369  (((
370 370  Total : 11 bytes payload
... ... @@ -396,11 +396,15 @@
396 396  (% class="box infomessage" %)
397 397  (((
398 398  (((
408 +(((
399 399  **AT+MOD=2**
410 +)))
400 400  
412 +(((
401 401  **ATZ**
402 402  )))
403 403  )))
416 +)))
404 404  
405 405  (((
406 406  
... ... @@ -460,11 +460,15 @@
460 460  (% class="box infomessage" %)
461 461  (((
462 462  (((
476 +(((
463 463  **AT+MOD=3**
478 +)))
464 464  
480 +(((
465 465  **ATZ**
466 466  )))
467 467  )))
484 +)))
468 468  
469 469  (((
470 470  Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
... ... @@ -475,9 +475,13 @@
475 475  === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
476 476  
477 477  
495 +(((
478 478  **LT22222-L**: This mode the DI1 is used as a counting pin.
497 +)))
479 479  
499 +(((
480 480  The AVI1 is also used for counting. AVI1 is used to monitor the voltage. It will check the voltage **every 60s**, if voltage is higher or lower than VOLMAX mV, the AVI1 Counting increase 1, so AVI1 counting can be used to measure a machine working hour.
501 +)))
481 481  
482 482  [[image:image-20220523181903-8.png]]
483 483  
... ... @@ -505,14 +505,17 @@
505 505  (% class="box infomessage" %)
506 506  (((
507 507  (((
529 +(((
508 508  **AT+MOD=4**
531 +)))
509 509  
533 +(((
510 510  **ATZ**
511 511  )))
512 512  )))
537 +)))
513 513  
514 514  
515 -
516 516  (((
517 517  Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
518 518  )))
... ... @@ -566,11 +566,15 @@
566 566  (% class="box infomessage" %)
567 567  (((
568 568  (((
593 +(((
569 569  **AT+MOD=5**
595 +)))
570 570  
597 +(((
571 571  **ATZ**
572 572  )))
573 573  )))
601 +)))
574 574  
575 575  (((
576 576  Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
... ... @@ -593,7 +593,6 @@
593 593  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
594 594  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.**
595 595  
596 -
597 597  (% style="color:#037691" %)**AT Command to set Trigger Condition**:
598 598  
599 599  
... ... @@ -719,13 +719,12 @@
719 719  
720 720  
721 721  
722 -
723 723  === 3.3.7 Payload Decoder ===
724 724  
725 725  (((
726 726  
727 727  
728 -**Decoder for TTN/loraserver/ChirpStack**:  [[https:~~/~~/www.dropbox.com/sh/wtrzu7avdtkmn3z/AACK5NwOMkU9jnvf1uCMuqrVa?dl=0>>https://www.dropbox.com/sh/wtrzu7avdtkmn3z/AACK5NwOMkU9jnvf1uCMuqrVa?dl=0]]
754 +**Decoder for TTN/loraserver/ChirpStack**:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
729 729  )))
730 730  
731 731  
... ... @@ -733,11 +733,15 @@
733 733  == 3.4 ​Configure LT via AT or Downlink ==
734 734  
735 735  
762 +(((
736 736  User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
764 +)))
737 737  
738 738  (((
767 +(((
739 739  There are two kinds of Commands:
740 740  )))
770 +)))
741 741  
742 742  * (% style="color:#4f81bd" %)**Common Commands**(%%): They should be available for each sensor, 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]]
743 743  
... ... @@ -744,10 +744,13 @@
744 744  * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
745 745  
746 746  
777 +
747 747  === 3.4.1 Common Commands ===
748 748  
749 749  
781 +(((
750 750  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]]
783 +)))
751 751  
752 752  
753 753  
... ... @@ -893,7 +893,6 @@
893 893  * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
894 894  * **0x09 01 aa bb cc    ** ~/~/ same as AT+TRIG1=aa,0x(bb cc)
895 895  
896 -
897 897  ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
898 898  
899 899  
... ... @@ -1319,10 +1319,13 @@
1319 1319  
1320 1320  Example：**aa xx xx xx xx**         ~/~/ aa indicates whether the configuration has changed, 00 is yes, 01 is no; xx xx xx xx are the bytes sent.
1321 1321  
1354 +
1322 1322  [[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-20220823173747-6.png?width=1124&height=165&rev=1.1||alt="image-20220823173747-6.png"]]
1323 1323  
1324 1324  For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1325 1325  
1359 +
1360 +
1326 1326  [[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-20220823173833-7.png?width=1124&height=149&rev=1.1||alt="image-20220823173833-7.png"]]
1327 1327  
1328 1328  For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
... ... @@ -1335,7 +1335,7 @@
1335 1335  * (((
1336 1336  (% style="color:#037691" %)**Downlink Payload**(%%)**:**
1337 1337  
1338 -**26 01  ** ~/~/ Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1373 +**26 01  ** ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1339 1339  
1340 1340  
1341 1341  )))
... ... @@ -1556,13 +1556,13 @@
1556 1556  We take the wind speed sensor as an example for reference only.
1557 1557  
1558 1558  
1559 -**Specifications of the wind speed sensor:**
1594 +(% style="color:blue" %)**Specifications of the wind speed sensor:**
1560 1560  
1561 -Red:  12~~24v
1596 +**Red:  12~~24v**
1562 1562  
1563 -Yellow:  4~~20mA
1598 +**Yellow:  4~~20mA**
1564 1564  
1565 -Black:  GND
1600 +**Black:  GND**
1566 1566  
1567 1567  
1568 1568  **Connection diagram:**
... ... @@ -1600,8 +1600,14 @@
1600 1600  == 4.1 Access AT Command ==
1601 1601  
1602 1602  
1638 +(((
1603 1603  LT supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to LT for using AT command, as below.
1640 +)))
1604 1604  
1642 +(((
1643 +
1644 +)))
1645 +
1605 1605  [[image:1653358238933-385.png]]
1606 1606  
1607 1607  
... ... @@ -1629,7 +1629,7 @@
1629 1629  )))
1630 1630  
1631 1631  (((
1632 -AT+<CMD>=?       : Get the value
1673 +AT+<CMD>=?       :  Get the value
1633 1633  )))
1634 1634  
1635 1635  (((
... ... @@ -1657,11 +1657,11 @@
1657 1657  )))
1658 1658  
1659 1659  (((
1660 -AT+APPSKEY: Get or Set the Application Session Key
1701 +AT+APPSKEY:  Get or Set the Application Session Key
1661 1661  )))
1662 1662  
1663 1663  (((
1664 -AT+APPEUI: Get or Set the Application EUI
1705 +AT+APPEUI:  Get or Set the Application EUI
1665 1665  )))
1666 1666  
1667 1667  (((
... ... @@ -1673,7 +1673,7 @@
1673 1673  )))
1674 1674  
1675 1675  (((
1676 -AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1717 +AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1677 1677  )))
1678 1678  
1679 1679  (((
... ... @@ -1709,7 +1709,7 @@
1709 1709  )))
1710 1710  
1711 1711  (((
1712 -AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1753 +AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1713 1713  )))
1714 1714  
1715 1715  (((
... ... @@ -1753,7 +1753,7 @@
1753 1753  )))
1754 1754  
1755 1755  (((
1756 -AT+VER: Get current image version and Frequency Band
1797 +AT+VER:  Get current image version and Frequency Band
1757 1757  )))
1758 1758  
1759 1759  (((
... ... @@ -1761,7 +1761,7 @@
1761 1761  )))
1762 1762  
1763 1763  (((
1764 -AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1805 +AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1765 1765  )))
1766 1766  
1767 1767  (((
... ... @@ -1810,40 +1810,42 @@
1810 1810  (((
1811 1811  
1812 1812  
1813 -**If device has not joined network yet:**
1854 +(((
1855 +(% style="color:blue" %)**If device has not joined network yet:**
1814 1814  )))
1857 +)))
1815 1815  
1816 1816  (((
1817 -(% style="background-color:#dcdcdc" %)123456
1860 +(% style="background-color:#dcdcdc" %)**123456**
1818 1818  )))
1819 1819  
1820 1820  (((
1821 -(% style="background-color:#dcdcdc" %)AT+FDR
1864 +(% style="background-color:#dcdcdc" %)**AT+FDR**
1822 1822  )))
1823 1823  
1824 1824  (((
1825 -(% style="background-color:#dcdcdc" %)123456
1868 +(% style="background-color:#dcdcdc" %)**123456**
1826 1826  )))
1827 1827  
1828 1828  (((
1829 -(% style="background-color:#dcdcdc" %)AT+NJM=0
1872 +(% style="background-color:#dcdcdc" %)**AT+NJM=0**
1830 1830  )))
1831 1831  
1832 1832  (((
1833 -(% style="background-color:#dcdcdc" %)ATZ
1876 +(% style="background-color:#dcdcdc" %)**ATZ**
1834 1834  )))
1835 1835  
1836 1836  
1837 1837  (((
1838 -**If device already joined network:**
1881 +(% style="color:blue" %)**If device already joined network:**
1839 1839  )))
1840 1840  
1841 1841  (((
1842 -(% style="background-color:#dcdcdc" %)AT+NJM=0
1885 +(% style="background-color:#dcdcdc" %)**AT+NJM=0**
1843 1843  )))
1844 1844  
1845 1845  (((
1846 -(% style="background-color:#dcdcdc" %)ATZ
1889 +(% style="background-color:#dcdcdc" %)**ATZ**
1847 1847  )))
1848 1848  
1849 1849  
... ... @@ -1853,55 +1853,57 @@
1853 1853  (((
1854 1854  
1855 1855  
1856 -(% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1899 +(((
1900 +(% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter Password to have AT access.
1857 1857  )))
1902 +)))
1858 1858  
1859 1859  (((
1860 -(% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1905 +(% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset Parameters to Factory Default, Keys Reserve
1861 1861  )))
1862 1862  
1863 1863  (((
1864 -(% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1909 +(% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter Password to have AT access.
1865 1865  )))
1866 1866  
1867 1867  (((
1868 -(% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1913 +(% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to work in CLASS C
1869 1869  )))
1870 1870  
1871 1871  (((
1872 -(% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1917 +(% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
1873 1873  )))
1874 1874  
1875 1875  (((
1876 -(% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1921 +(% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
1877 1877  )))
1878 1878  
1879 1879  (((
1880 -(% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1925 +(% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
1881 1881  )))
1882 1882  
1883 1883  (((
1884 -(% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1929 +(% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
1885 1885  )))
1886 1886  
1887 1887  (((
1888 -(% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1933 +(% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4Mhz
1889 1889  )))
1890 1890  
1891 1891  (((
1892 -(% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1937 +(% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2Frequency to 868.4Mhz (according to the result from server)
1893 1893  )))
1894 1894  
1895 1895  (((
1896 -(% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1941 +(% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2DR to match the downlink DR from server. see below
1897 1897  )))
1898 1898  
1899 1899  (((
1900 -(% style="background-color:#dcdcdc" %) AT+DADDR=26 01 1A F1 (%%) Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1945 +(% style="background-color:#dcdcdc" %)** AT+DADDR=26 01 1A F1** (%%) ~/~/ Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1901 1901  )))
1902 1902  
1903 1903  (((
1904 -(% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1949 +(% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
1905 1905  
1906 1906  
1907 1907  )))
... ... @@ -1911,11 +1911,15 @@
1911 1911  )))
1912 1912  
1913 1913  (((
1914 -(% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1915 -2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1916 -3. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.
1917 -4. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5
1959 +**~1. Make sure the device is set to ABP mode in the IoT Server.**
1918 1918  
1961 +**2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.**
1962 +
1963 +**3. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?
1964 +dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
1965 +
1966 +**4. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5**
1967 +
1919 1919  
1920 1920  )))
1921 1921  
... ... @@ -1931,12 +1931,15 @@
1931 1931  === 4.2.3 Change to Class A ===
1932 1932  
1933 1933  
1934 -If sensor JOINED
1935 -(% style="background-color:#dcdcdc" %)AT+CLASS=A
1936 -ATZ
1983 +(((
1984 +(% style="color:blue" %)If sensor JOINED:
1937 1937  
1986 +(% style="background-color:#dcdcdc" %)**AT+CLASS=A
1987 +ATZ**
1988 +)))
1938 1938  
1939 1939  
1991 +
1940 1940  = 5. FAQ =
1941 1941  
1942 1942  
... ... @@ -1960,8 +1960,10 @@
1960 1960  (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1961 1961  
1962 1962  
2015 +(((
1963 1963  (% style="color:blue" %)**For LT-22222-L**(%%):
1964 1964  Hold down the PRO button and then momentarily press the RST reset button and the (% style="color:red" %)**DO1 led**(%%) will change from OFF to ON. When (% style="color:red" %)**DO1 LED**(%%) is on, it means the device is in download mode.
2018 +)))
1965 1965  
1966 1966  
1967 1967  )))
... ... @@ -2042,16 +2042,15 @@
2042 2042  )))
2043 2043  
2044 2044  (((
2045 -(% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
2046 -(% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
2047 -(% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
2048 -(% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
2049 -(% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
2050 -(% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
2051 -(% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
2052 -(% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
2053 -(% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
2054 -(% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
2099 +(% style="background-color:#dcdcdc" %)**123456** (%%) :  Enter Password to have AT access.
2100 +(% style="background-color:#dcdcdc" %)**AT+FDR**(%%)  :  Reset Parameters to Factory Default, Keys Reserve
2101 +(% style="background-color:#dcdcdc" %)**AT+NJM=0** (%%) :  Set to ABP mode
2102 +(% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) :  Set the Adaptive Data Rate Off
2103 +(% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) :  Set Data Rate (Set AT+DR=3 for 915 band)
2104 +(% style="background-color:#dcdcdc" %)**AT+TDC=60000 **(%%) :  Set transmit interval to 60 seconds
2105 +(% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) : Set transmit frequency to 868.4Mhz
2106 +(% style="background-color:#dcdcdc" %)**AT+DADDR=26 01 1A F1**(%%)  :  Set Device Address to 26 01 1A F1
2107 +(% style="background-color:#dcdcdc" %)**ATZ**        (%%) :  Reset MCU
2055 2055  )))
2056 2056  
2057 2057  
... ... @@ -2074,7 +2074,7 @@
2074 2074  == 5.5 Can i use point to point communication for LT-22222-L? ==
2075 2075  
2076 2076  
2077 -Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
2130 +Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]  ，this is [[firmware>>https://www.dropbox.com/sh/g99v0fxcltn9r1y/AADKXQ2v5ZT-S3sxdmbvE7UAa/LT-22222-L/image?dl=0&subfolder_nav_tracking=1]].
2078 2078  
2079 2079  
2080 2080  
... ... @@ -2093,15 +2093,17 @@
2093 2093  After restart, the status before power failure will be read from flash.
2094 2094  
2095 2095  
2149 +
2096 2096  == 5.7 Can i set up LT-22222-L as a NC(Normal Close) Relay? ==
2097 2097  
2152 +
2098 2098  LT-22222-L built-in relay is NO (Normal Open). User can use an external relay to achieve Normal Close purpose. Diagram as below:
2099 2099  
2155 +
2100 2100  [[image:image-20221006170630-1.png||height="610" width="945"]]
2101 2101  
2102 2102  
2103 2103  
2104 -
2105 2105  = 6. Trouble Shooting =
2106 2106  
2107 2107  

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