Skip to Content
Last modified by Mengting Qiu on 2025/06/04 18:42
From version 217.1
edited by Dilisi S
on 2024/11/24 22:28
Change comment: Nov 24 Fix images and few edits
To version 216.1
edited by Dilisi S
on 2024/11/24 22:05
Change comment: Uploaded new attachment "usb-ttl-audio-jack-connection.jpg", version {1}

Summary

Details

Page properties
Content
... ... @@ -1720,6 +1720,7 @@
1720 1720  After the device is reset, the previously saved RODO state (limited to MOD2 to MOD5) is read, and it will not change when the device reconnects to the network.
1721 1721  )))
1722 1722  
1723 +
1723 1723  (% style="color:#037691" %)**Downlink Payload**
1724 1724  
1725 1725  (% border="2" style="width:500px" %)
... ... @@ -2065,7 +2065,7 @@
2065 2065  === 3.6.1 Digital Input Ports: DI1/DI2/DI3 (For LT-33222-L, Low Active) ===
2066 2066  
2067 2067  
2068 -Supports** NPN-type **sensors.
2069 +Supports NPN-type sensors.
2069 2069  
2070 2070  [[image:1653356991268-289.png]]
2071 2071  
... ... @@ -2187,15 +2187,15 @@
2187 2187  )))
2188 2188  
2189 2189  
2190 -(% style="color:blue" %)**Example 4**(%%): Connecting to a Dry Contact sensor
2191 +(% style="color:blue" %)**Example4**(%%): Connecting to Dry Contact sensor
2191 2191  
2192 -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.
2193 +From the DI port circuit above, you can see that 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.
2193 2193  
2194 -To detect a Dry Contact, you can supply a power source to one of the pins of the Dry Contact. A reference circuit diagram is shown below.
2195 +To detect a Dry Contact, you can supply a power source to one pin of the Dry Contact. Below is a reference circuit diagram.
2195 2195  
2196 2196  [[image:image-20230616235145-1.png]]
2197 2197  
2198 -(% style="color:blue" %)**Example 5**(%%): Connecting to an Open Collector
2199 +(% style="color:blue" %)**Example5**(%%): Connecting to an Open Collector
2199 2199  
2200 2200  [[image:image-20240219115718-1.png]]
2201 2201  
... ... @@ -2271,7 +2271,7 @@
2271 2271  [[image:image-20220524100215-10.png||height="382" width="723"]]
2272 2272  
2273 2273  
2274 -== 3.7 LED Indicators ==
2275 +== 3.7 LEDs Indicators ==
2275 2275  
2276 2276  The table below lists the behavior of LED indicators for each port function.
2277 2277  
... ... @@ -2310,14 +2310,13 @@
2310 2310  == 4.1 Connecting the LT-22222-L to a PC ==
2311 2311  
2312 2312  (((
2313 -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.
2314 +You can use a USB-to-TTL adapter along with a 3.5mm Program Cable to connect the LT-22222-L to a PC, as shown below.
2314 2314  
2315 -[[image:usb-ttl-audio-jack-connection.jpg]]
2316 -
2317 -
2316 +[[image:usb-ttl-programming.png]]
2318 2318  )))
2319 2319  
2320 2320  
2320 +
2321 2321  (((
2322 2322  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:
2323 2323  )))
... ... @@ -2347,39 +2347,39 @@
2347 2347  * **##AT+APPSKEY##**: Get or set the Application Session Key (AppSKey)
2348 2348  * **##AT+APPEUI##**: Get or set the Application EUI (AppEUI)
2349 2349  * **##AT+ADR##**: Get or set the Adaptive Data Rate setting. (0: OFF, 1: ON)
2350 -* ##**AT+TXP**##: Get or set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Specification)
2351 -* **##AT+DR##**:  Get or set the Data Rate. (0-7 corresponding to DR_X)  
2352 -* **##AT+DCS##**: Get or set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
2353 -* ##**AT+PNM**##: Get or set the public network mode. (0: off, 1: on)
2354 -* ##**AT+RX2FQ**##: Get or set the Rx2 window frequency
2355 -* ##**AT+RX2DR**##: Get or set the Rx2 window data rate (0-7 corresponding to DR_X)
2356 -* ##**AT+RX1DL**##: Get or set the delay between the end of the Tx and the Rx Window 1 in ms
2357 -* ##**AT+RX2DL**##: Get or set the delay between the end of the Tx and the Rx Window 2 in ms
2358 -* ##**AT+JN1DL**##: Get or set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
2359 -* ##**AT+JN2DL**##: Get or set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
2360 -* ##**AT+NJM**##: Get or set the Network Join Mode. (0: ABP, 1: OTAA)
2361 -* ##**AT+NWKID**##: Get or set the Network ID
2362 -* ##**AT+FCU**##: Get or set the Frame Counter Uplink (FCntUp)
2363 -* ##**AT+FCD**##: Get or set the Frame Counter Downlink (FCntDown)
2364 -* ##**AT+CLASS**##: Get or set the Device Class
2365 -* ##**AT+JOIN**##: Join network
2366 -* ##**AT+NJS**##: Get OTAA Join Status
2367 -* ##**AT+SENDB**##: Send hexadecimal data along with the application port
2368 -* ##**AT+SEND**##: Send text data along with the application port
2369 -* ##**AT+RECVB**##: Print last received data in binary format (with hexadecimal values)
2370 -* ##**AT+RECV**##: Print last received data in raw format
2371 -* ##**AT+VER**##: Get current image version and Frequency Band
2372 -* ##**AT+CFM**##: Get or Set the confirmation mode (0-1)
2373 -* ##**AT+CFS**##: Get confirmation status of the last AT+SEND (0-1)
2374 -* ##**AT+SNR**##: Get the SNR of the last received packet
2375 -* ##**AT+RSSI**##: Get the RSSI of the last received packet
2376 -* ##**AT+TDC**##: Get or set the application data transmission interval in ms
2377 -* ##**AT+PORT**##: Get or set the application port
2378 -* ##**AT+DISAT**##: Disable AT commands
2379 -* ##**AT+PWORD**##: Set password, max 9 digits
2380 -* ##**AT+CHS**##: Get or set the Frequency (Unit: Hz) for Single Channel Mode
2381 -* ##**AT+CHE**##: Get or set eight channels mode, Only for US915, AU915, CN470
2382 -* ##**AT+CFG**##: Print all settings
2350 +* AT+TXP: Get or set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Specification)
2351 +* AT+DR:  Get or set the Data Rate. (0-7 corresponding to DR_X)  
2352 +* AT+DCS: Get or set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
2353 +* AT+PNM: Get or set the public network mode. (0: off, 1: on)
2354 +* AT+RX2FQ: Get or set the Rx2 window frequency
2355 +* AT+RX2DR: Get or set the Rx2 window data rate (0-7 corresponding to DR_X)
2356 +* AT+RX1DL: Get or set the delay between the end of the Tx and the Rx Window 1 in ms
2357 +* AT+RX2DL: Get or set the delay between the end of the Tx and the Rx Window 2 in ms
2358 +* AT+JN1DL: Get or set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
2359 +* AT+JN2DL: Get or set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
2360 +* AT+NJM: Get or set the Network Join Mode. (0: ABP, 1: OTAA)
2361 +* AT+NWKID: Get or set the Network ID
2362 +* AT+FCU: Get or set the Frame Counter Uplink (FCntUp)
2363 +* AT+FCD: Get or set the Frame Counter Downlink (FCntDown)
2364 +* AT+CLASS: Get or set the Device Class
2365 +* AT+JOIN: Join network
2366 +* AT+NJS: Get OTAA Join Status
2367 +* AT+SENDB: Send hexadecimal data along with the application port
2368 +* AT+SEND: Send text data along with the application port
2369 +* AT+RECVB: Print last received data in binary format (with hexadecimal values)
2370 +* AT+RECV: Print last received data in raw format
2371 +* AT+VER: Get current image version and Frequency Band
2372 +* AT+CFM: Get or Set the confirmation mode (0-1)
2373 +* AT+CFS: Get confirmation status of the last AT+SEND (0-1)
2374 +* AT+SNR: Get the SNR of the last received packet
2375 +* AT+RSSI: Get the RSSI of the last received packet
2376 +* AT+TDC: Get or set the application data transmission interval in ms
2377 +* AT+PORT: Get or set the application port
2378 +* AT+DISAT: Disable AT commands
2379 +* AT+PWORD: Set password, max 9 digits
2380 +* AT+CHS: Get or set the Frequency (Unit: Hz) for Single Channel Mode
2381 +* AT+CHE: Get or set eight channels mode, Only for US915, AU915, CN470
2382 +* AT+CFG: Print all settings
2383 2383  )))
2384 2384  
2385 2385  
... ... @@ -2544,7 +2544,7 @@
2544 2544  You will need the following things before proceeding:
2545 2545  
2546 2546  * 3.5mm programming cable (included with the LT-22222-L as an additional accessory)
2547 -* USB to TTL adapter/converter
2547 +* USB to TTL adapter
2548 2548  * Download and install the [[STM32 Flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]]. (replaced by STM32CubeProgrammer)
2549 2549  * Download the latest firmware image from [[LT-22222-L firmware image files>>https://www.dropbox.com/sh/g99v0fxcltn9r1y/AACrbrDN0AqLHbBat0ViWx5Da/LT-22222-L/Firmware?dl=0&subfolder_nav_tracking=1]]. Check the file name of the firmware to find the correct region.
2550 2550  
... ... @@ -2554,7 +2554,7 @@
2554 2554  
2555 2555  Below is the hardware setup for uploading a firmware image to the LT-22222-L:
2556 2556  
2557 -[[image:usb-ttl-audio-jack-connection.jpg]]
2557 +[[image:usb-ttl-programming.png]]
2558 2558  
2559 2559  
2560 2560