Changes for page LT-22222-LA -- LoRa I/O Controller User Manual

Last modified by Kilight Cao on 2025/07/03 15:34

From 52.1 to 52.2 From 54.3 to 55.1

From version 52.2

edited by Kilight Cao
on 2025/07/03 14:56

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To version 54.3

edited by Kilight Cao
on 2025/07/03 15:05

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@@ -2409,13 +2409,13 @@
  (((
  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.
--(% title="Click and drag to resize" %)
++(% title="Click and drag to resize" %)[[image:1751525987713-642.png]]
  )))
  (((
--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:
++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:
  )))
  [[image:1653358355238-883.png]]
@@ -2422,13 +2422,13 @@
  (((
--== 4.2 LT-22222-L related AT commands ==
++== 4.2 LT-22222-LA related AT commands ==
  )))
  (((
--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.
++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.
  * **##AT##+<CMD>?** : Help on <CMD>
  * **##AT##+<CMD>** : Run <CMD>
@@ -2525,85 +2525,11 @@
  )))
--=== 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
--
  (((
--
--(((
--(% style="background-color:#dcdcdc" %)**123456**(%%)        ~/~/ Enter the password to enable AT commands access
  )))
--)))
--(((
--(% style="background-color:#dcdcdc" %)** AT+FDR**(%%)     ~/~/ Reset parameters to Factory Default, Reserve keys
--)))
--(((
--(% style="background-color:#dcdcdc" %)** 123456**(%%)       ~/~/ Enter the password to enable AT command access
--)))
--
--(((
--(% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)   ~/~/ Set to CLASS C mode
--)))
--
--(((
--(% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)     ~/~/ Set to ABP mode
--)))
--
--(((
--(% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)     ~/~/ Set the Adaptive Data Rate Off
--)))
--
--(((
--(% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)       ~/~/ Set Data Rate
--)))
--
--(((
--(% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)              ~/~/ Set transmit interval to 60 seconds
--)))
--
--(((
--(% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)     ~/~/ Set transmit frequency to 868.4 MHz
--)))
--
--(((
--(% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)    ~/~/ Set RX2 frequency to 868.4 MHz (according to the result from the server)
--)))
--
--(((
--(% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** **                   ~/~/ Set RX2 DR to match the downlink DR from the server. See below.
--)))
--
--(((
--(% 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.
--)))
--
--(((
--(% style="background-color:#dcdcdc" %)** ATZ**         (%%)                                 ~/~/ Reset MCU
--
--
--)))
--
--(((
--(% style="color:red" %)**Note:**
--)))
--
--(((
--**~1. Ensure that the device is set to ABP mode in the LoRaWAN Network Server.**
--
--**2. Verify that the LG01/02 gateway RX frequency matches the AT+CHS setting exactly.**
--
--**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.**
--
--**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.**
--)))
--
--(((
--
--)))
--
--
  === 4.2.3 Change to Class A ===
@@ -2763,6 +2763,7 @@
  (% 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:
  )))
++[[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/1653360498588-932.png?width=726&height=485&rev=1.1||alt="1653360498588-932.png"]]
  == 6.4 How to change the uplink interval? ==
@@ -2778,16 +2778,11 @@
  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.
--== 6.6 Can I use point-to-point communication with LT-22222-L? ==
--
--
--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]].
--
  )))
  (((
--== 6.7 Why does the relay output default to an open relay after the LT-22222-L is powered off? ==
++== 6.6 Why does the relay output default to an open relay after the LT-22222-LA is powered off? ==
  * If the device is not properly shut down and is directly powered off.
@@ -2795,23 +2795,19 @@
  * In modes 2 to 5, the DO/RO status and pulse count are saved to flash memory.
  * After a restart, the status before the power failure will be read from Flash.
--== 6.8 Can I set up LT-22222-L as an NC (Normally Closed) relay? ==
++== 6.7 Can I set up LT-22222-LA as an NC (Normally Closed) relay? ==
--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:
++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:
++[[image:image-20221006170630-1.png]]
--== 6.9 Can the LT-22222-L save the RO state? ==
++== 6.8 Why does the LT-22222-LA always report 15.585V when measuring the AVI? ==
--To enable this feature, the firmware version must be 1.6.0 or higher.
--
--== 6.10 Why does the LT-22222-L always report 15.585V when measuring the AVI? ==
--
--
  It is likely that the GND is not connected during the measurement, or that the wire connected to the GND is loose.

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