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Last modified by Kilight Cao on 2025/07/03 15:34
From version 52.1
edited by Kilight Cao
on 2025/07/03 14:56
Change comment: Uploaded new attachment "1653358355238-883.png", version {1}
To version 53.3
edited by Kilight Cao
on 2025/07/03 15:02
Change comment: There is no comment for this version

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... ... @@ -2409,25 +2409,26 @@
2409 2409  (((
2410 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.
2411 2411  
2412 -(% title="Click and drag to resize" %)​​​
2412 +(% title="Click and drag to resize" %)​​[[image:1751525987713-642.png]]​
2413 2413  
2414 2414  
2415 2415  )))
2416 2416  
2417 2417  (((
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-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:
2419 2419  )))
2420 2420  
2421 +[[image:1653358355238-883.png]]
2421 2421  
2422 2422  
2423 2423  (((
2424 -== 4.2 LT-22222-L related AT commands ==
2425 +== 4.2 LT-22222-LA related AT commands ==
2425 2425  
2426 2426  
2427 2427  )))
2428 2428  
2429 2429  (((
2430 -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.
2431 2431  
2432 2432  * **##AT##+<CMD>?** : Help on <CMD>
2433 2433  * **##AT##+<CMD>** : Run <CMD>
... ... @@ -2524,85 +2524,11 @@
2524 2524  )))
2525 2525  
2526 2526  
2527 -=== 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
2528 -
2529 2529  (((
2530 2530  
2531 -
2532 -(((
2533 -(% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter the password to enable AT commands access
2534 2534  )))
2535 -)))
2536 2536  
2537 -(((
2538 -(% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset parameters to Factory Default, Reserve keys
2539 -)))
2540 2540  
2541 -(((
2542 -(% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter the password to enable AT command access
2543 -)))
2544 -
2545 -(((
2546 -(% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to CLASS C mode
2547 -)))
2548 -
2549 -(((
2550 -(% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
2551 -)))
2552 -
2553 -(((
2554 -(% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
2555 -)))
2556 -
2557 -(((
2558 -(% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
2559 -)))
2560 -
2561 -(((
2562 -(% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
2563 -)))
2564 -
2565 -(((
2566 -(% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4 MHz
2567 -)))
2568 -
2569 -(((
2570 -(% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2 frequency to 868.4 MHz (according to the result from the server)
2571 -)))
2572 -
2573 -(((
2574 -(% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2 DR to match the downlink DR from the server. See below.
2575 -)))
2576 -
2577 -(((
2578 -(% 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.
2579 -)))
2580 -
2581 -(((
2582 -(% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
2583 -
2584 -
2585 -)))
2586 -
2587 -(((
2588 -(% style="color:red" %)**Note:**
2589 -)))
2590 -
2591 -(((
2592 -**~1. Ensure that the device is set to ABP mode in the LoRaWAN Network Server.**
2593 -
2594 -**2. Verify that the LG01/02 gateway RX frequency matches the AT+CHS setting exactly.**
2595 -
2596 -**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.**
2597 -
2598 -**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.**
2599 -)))
2600 -
2601 -(((
2602 -
2603 -)))
2604 -
2605 -
2606 2606  === 4.2.3 Change to Class A ===
2607 2607  
2608 2608  
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