Version 70.4 by Mengting Qiu on 2025/02/14 16:57

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Edwin Chen 8.1 1 **Table of Contents:**
2
3 {{toc/}}
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5
Xiaoling 11.2 6
Xiaoling 10.2 7 = 1. Overview =
Edwin Chen 1.1 8
Xiaoling 10.2 9
Edwin Chen 23.1 10 There are some new models of Dragino sensors support OTA update via Private LoRa Protocol, (Even the sensor runs LoRaWAN protocol by default).
Edwin Chen 1.1 11
Edwin Chen 23.1 12 User can use the OTA update to update the configure file or firmware to the sensors.
Edwin Chen 1.1 13
Edwin Chen 23.1 14
Xiaoling 10.2 15 = 2. Support Models =
16
17
Edwin Chen 1.1 18 Here list the models that support OTA Update.
19
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Xiaoling 32.2 25 (% border="1" cellspacing="5" class="doOddEven filterable grid sortable" id="tableid" style="background-color:#ffffff; width:670px" %)
26 (% class="sortHeader" %)|=(% style="width: 258px; background-color: rgb(217, 226, 243);" %)Models|=(% style="width: 158px; background-color: rgb(217, 226, 243);" %)Firmware Version|=(% style="width: 251px;background-color:#D9E2F3" %)Comments
27 |(% style="width:258px" %)RS485-LB/LS|(% style="width:158px" %)All firmware version|(% style="width:251px" %)
28 |(% style="width:258px" %)SN50v3-LB|(% style="width:158px" %)All firmware version|(% style="width:251px" %)
29 |(% style="width:258px" %)PS-LB-NA|(% style="width:158px" %)All firmware version|(% style="width:251px" %)
30 |(% style="width:258px" %)TS01-LB/LS|(% style="width:158px" %)All firmware version|(% style="width:251px" %)
31 |(% style="width:258px" %)CS01-LB|(% style="width:158px" %)All firmware version|(% style="width:251px" %)
32 |(% style="width:258px" %)AIS01-LB|(% style="width:158px" %)All firmware version|(% style="width:251px" %)
33 |(% style="width:258px" %)TC01-LB/ TC11-LB|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
34 |(% style="width:258px" %)LHT65N|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
35 |(% style="width:258px" %)LHT65N-PIR,LHT65N-E31F|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
36 |(% style="width:258px" %)D20-LB/D20S-LB/D22-LB/D23-LB|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
37 |(% style="width:258px" %)S31/S31B-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
38 |(% style="width:258px" %)AQS01-L|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
39 |(% style="width:258px" %)UV254-LB|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
40 |(% style="width:258px" %)SDI-12-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
41 |(% style="width:258px" %)SE01-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
42 |(% style="width:258px" %)PS-LB|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
43 |(% style="width:258px" %)SE02-LB|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
44 |(% style="width:258px" %)SPH01-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
45 |(% style="width:258px" %)LMS01-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
46 |(% style="width:258px" %)WL03A-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
47 |(% style="width:258px" %)DS03A-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
48 |(% style="width:258px" %)CPL03-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
49 |(% style="width:258px" %)SW3L-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
50 |(% style="width:258px" %)LCC01-LB|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
51 |(% style="width:258px" %)PS-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
52 |(% style="width:258px" %)LDS12-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
53 |(% style="width:258px" %)LDS40-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
54 |(% style="width:258px" %)DDS75-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
55 |(% style="width:258px" %)DDS45-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
56 |(% style="width:258px" %)DDS20-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
57 |(% style="width:258px" %)DDS04-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
58 |(% style="width:258px" %)MDS120-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
59 |(% style="width:258px" %)MDS200-LB/LS|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
60 |(% style="width:258px" %)DS20L|(% style="width:158px" %)All Firmware Version|(% style="width:251px" %)
Edwin Chen 2.1 61
Xiaoling 10.2 62 = 3. How to do OTA update =
63
64 == 3.1 Required Components ==
65
Mengting Qiu 45.1 66 * See FAQ 4.4 for how to update LA66 with the [[OTA Dongle Firmware>>https://www.dropbox.com/scl/fo/ztlw35a9xbkomu71u31im/AFhmjtEOaipfBAFrpMCoWrI/LoRaWAN%20End%20Node/LA66%20LoRaWAN%20module/Firmware/OTA_Firmware?dl=0&rlkey=ojjcsw927eaow01dgooldq3nu&subfolder_nav_tracking=1]].
Edwin Chen 29.1 67 * Software: [[OTA_Tool>>https://www.dropbox.com/scl/fo/9kqeqf6wmet10o9hgxuwa/h?rlkey=4ikrg6kg5v0yjxwhp0i37wrv7&dl=0]]. Only support Windows now
Edwin Chen 7.1 68
Edwin Chen 16.1 69 [[image:image-20230513120722-2.png||height="409" width="866"]]
Edwin Chen 7.1 70
Edwin Chen 14.1 71
Edwin Chen 57.1 72 == 3.2 OTA Update Firmware via Mobile Phone + LA66 ==
Xiaoling 10.2 73
Mengting Qiu 70.2 74 === 3.2.1 LB series ===
Xiaoling 10.2 75
Mengting Qiu 70.3 76 * Upgrade of external tools: LA66 USB
Mengting Qiu 70.2 77 [[image:image-20250214161740-1.png]][[image:image-20250214161758-2.png]]
78 * Before using LA66 as a firmware burning tool for -LB products, you need to burn OTA_firmware for LA66 first.
79 * If you have never downloaded LA66 OTA DongleV1.0 to your LA66, you can directly upgrade the LA66 OTA DongleV1.1 program from your phone using the following method.
80 * Click to get [[bootlooder and OTA_firmware.>>https://www.dropbox.com/scl/fo/ztlw35a9xbkomu71u31im/ALF3WtzilGPi-2nOdtQw1Z4/Utility/Sensor%20Manager%20Utility/OTA_Firmware?dl=0&rlkey=ojjcsw927eaow01dgooldq3nu&subfolder_nav_tracking=1]]
81 * The firmware burning method refers to the LA66 upgrade below.[[Click to redirect.>>https://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/#H3.1.3.3LA66upgrade]]
Edwin Chen 57.1 82
Mengting Qiu 70.2 83 The LA66 USB connects to the phone via the USB-Type c adapter.
84
85 [[image:image-20250214161844-3.png]]
86
87
88 After the connection is successful, the phone will pop up a prompt box, check it and click to confirm.
89
90 (% style="color:red" %)**Note:**
91
Mengting Qiu 70.4 92 **Some models of cell phones require the OTG function of the cell phone system to be enabled manually in order to recognize the external device correctly.**
Mengting Qiu 70.2 93
94 [[image:image-20250214161907-4.png]]
95
96
97 (% class="wikigeneratedid" id="H-1" %)
Mengting Qiu 70.4 98 Then, the Device Tool will automatically jump to the main interface of the tool.
Mengting Qiu 70.2 99
100 (% class="wikigeneratedid" %)
101 Open the Devices Tool and click on (% _mstmutation="1" style="color:blue" %)**"Upgrade Device"**(%%).
102
103 (% class="wikigeneratedid" %)
104 Select the device type and click **"LB"**.
105
106 (% class="wikigeneratedid" %)
107 Follow the steps in order:
108
109 (% class="wikigeneratedid" %)
110 ① Enter the DUIEI,t
111
112 (% class="wikigeneratedid" %)
113 ② Enter the PIN (**the PIN is the last 8 bytes of APPSKEY**),
114
115 (% class="wikigeneratedid" %)
116 ③ Select the LoRa frequency to match the original frequency of the node,
117
118 (% class="wikigeneratedid" %)
119 ④ Choose the upgrade file,(% style="color:red" %)**(The firmware upgrade file format only supports .bin files)**
120
121 (% class="wikigeneratedid" %)
122 ⑤ After pressing the device's reset button, click start.
123
124 (% class="wikigeneratedid" %)
125 **(If the upgrade does not start for a long time, you can press the device reset button again.**
126
127 (% class="wikigeneratedid" %)
128 **If the user does not wish to open the casing, they can press and hold the KEY until the device flashes a green light; this action is equivalent to pressing the reset button.)**
129
130 [[image:image-20250214161928-5.png]]
131
132
133 (% class="wikigeneratedid" id="H-2" %)
134 When the upgrade is complete, it will prompt:"**update successfully**".
135
136 [[image:image-20250214161941-6.png]]
137
138
139 ==== 3.1.3.3 LA66 upgrade ====
140
141 The LA66 USB connects to the phone via the USB-Type C adapter.
142
143 [[image:image-20250214161955-7.png]]
144
145
146 After the connection is successful, the phone will pop up a prompt box, check it, and click to confirm.
147
148 (% style="color:red" %)**Note:**
149
150 **Some mobile phone models need to manually enable the OTG function to properly identify external devices.**
151
152 [[image:image-20250214162012-8.png]]
153
154
155 (% class="wikigeneratedid" id="H-1" %)
156 Then, the Device Tool will automatically open.
157
158 (% class="wikigeneratedid" %)
159 Follow the steps in order:
160
161 (% class="wikigeneratedid" %)
162 ① Click "SELECT UPGRADE FILE" to choose the firmware to upgrade.
163
164 (% class="wikigeneratedid" %)
165 **In order to ensure that the LA66 USB works properly, make sure that there is a corresponding bootloader before updating the firmware.**
166
167 (% class="wikigeneratedid" %)
168 **If you don't have a bootloader, you need to use the "[[Tremo Programmer>>https://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H3.1.3Howtouploadbootloadertodevice3F]]" software to download it. Click to get **[[bootlooder>>url:https://wiki.dragino.com/xwiki/bin/download/Main/BLE%20Bluetooth%20Remote%20Configure/WebHome/LoRa_OTA_Bootloader_v1.4.bin?rev=1.1]].
169
170 (% class="wikigeneratedid" %)
171 ② Click "START".
172
173 (% class="wikigeneratedid" %)
174 ③ Press the reset key on the LA66 device.
175
176 (% class="wikigeneratedid" %)
177 **For LA66 USB LoRaWAN Adapter v1.2, the design of the reset button has been eliminated on the hardware. **
178
179 [[image:image-20250214162156-13.png]]
180
181 (% class="wikigeneratedid" %)
182 [[image:image-20250214162029-9.png]]
183
184 When the upgrade is complete, it will prompt:"**update successfully**".
185
186 [[image:image-20250214162110-12.png]]
187
188
Edwin Chen 57.1 189 == 3.3 OTA Update Firmware via PC ==
190
191
Edwin Chen 21.1 192 (% class="wikigeneratedid" %)
Mengting Qiu 24.1 193 (% class="mark text-uppercase" %)**Video Instruction:**(%%) ~-~- OTA Upgrade Firmware (via LoRa) of LoRaWAN Sensors**: [[https:~~/~~/youtu.be/SSvOqvBrwGg>>https://youtu.be/SSvOqvBrwGg]]**
Edwin Chen 21.1 194
195
Xiaoling 30.1 196 === (% style="color:blue" %)**Step1:**(%%) Plug LA66 USB to PC and run OTA_Tool. ===
Xiaoling 10.2 197
198
Mengting Qiu 40.1 199 [[image:image-20250121091115-1.png]]
Edwin Chen 7.1 200
201
Xiaoling 10.2 202 === (% style="color:blue" %)**Step2:**(%%) Set up OTA Tool ===
Edwin Chen 7.1 203
204
Mengting Qiu 27.1 205 * (% style="color:blue" %)**DevEUI**(%%): Input DevEUI of your sensor
Xiaoling 10.2 206
Mengting Qiu 56.1 207 * (% style="color:blue" %)**Password**(%%): Passord of your sensor**(Last eight bytes/** **Last 16 characters of APPSKEY)**
Xiaoling 10.2 208
209 * (% style="color:blue" %)**Port**(%%): Com port of LA66 USB
210
211 * (% style="color:blue" %)**LoRa_Freq**(%%): Choose the shipped frequency band of your sensor.
212
213 * (% style="color:blue" %)**Upload_File**(%%): The firmware to be upload to the sensor. make sure the firmware is with surfix _without_bootloader. For example: LHT65N_EU868_v1.5_without_bootloader.
214
Mengting Qiu 45.1 215 * (% style="color:blue" %)**DEUI_File**(%%): If customer has lots of sensors. He can also import the Dev EUI files and use droplist to choose the sensor to update. (If you did not ask us for a uniform update file, then you do not need to use this field, please ignore it.) Format is as below:
Xiaoling 10.2 216
Edwin Chen 7.1 217 [[image:image-20230114174640-3.png||height="130" width="1169"]]
218
219
Mengting Qiu 40.1 220 === (% style="color:blue" %)**Step3:**(%%) After re-plugging the LA66 USB, click "Start" in the OTA tool. ===
Edwin Chen 7.1 221
Xiaoling 10.2 222
Mengting Qiu 40.1 223 Upon re-plugging, the LA66 USB will reboot and broadcast the update process using the Dev EUI and passcode
Edwin Chen 7.1 224
225
Xiaoling 10.2 226 === (% style="color:blue" %)**Step4:** (%%)Press reset button on the end node, or re-activate the end node. ===
Edwin Chen 7.1 227
Mengting Qiu 40.1 228 When the OTA Tool displays “**LA66 is scanning for sensor Dev EUI ‘(% style="color:blue" %)DevEUI(%%)’. Please reset the sensor for connection and update**”, press and hold the ACT button on the terminal node for 5 seconds to perform a terminal node reset so that the OTA Tool can connect successfully.
Xiaoling 10.2 229
Mengting Qiu 40.1 230 [[image:image-20250121093705-3.png]]
231
Edwin Chen 7.1 232 In every reboot/ reactivate, the end node will check if there is update request. If end node gets the update request from LA66. End node will check if the Dev EUI and Password match. If match, End node will establish connection with LA66 USB for OTA update.
233
234
Xiaoling 10.2 235 === (% style="color:blue" %)**Step5:**(%%) Check result. ===
Edwin Chen 7.1 236
Xiaoling 10.2 237
Edwin Chen 7.1 238 Below shows the update successul result.
239
Mengting Qiu 40.1 240 [[image:image-20250121093834-4.png]]
Edwin Chen 7.1 241
242
Edwin Chen 14.1 243 = 4. FAQ =
Edwin Chen 7.1 244
Mengting Qiu 50.1 245 == 4.1 OTA_Tool supports two upgrade methods for -LB products. ==
Edwin Chen 14.1 246
247
Mengting Qiu 54.1 248 (% style="color:red" %)**Note: The premise of using OTA_Tool is that all your devices have bootloaders.**
Xiaoling 20.2 249
Mengting Qiu 54.1 250 (% style="color:red" %)**1. **(%%)Only devices with bootloader can perform OTA upgrades(OTA upgrade method).
251
252 (% style="color:red" %)**2.**(%%) This is because the boot loader's address is (% style="color:blue" %)**0x08000000**(%%), the general functional firmware's address is (% style="color:blue" %)**0x0800D000**(%%), and burning the firmware through OTA_Tool will only write content to the address (% style="color:blue" %)**0x0800D000**(%%). So whether you use the OTA_Tool's OTA upgrade method or the UART upgrade method, you can only use it to download firmware without a bootloader, otherwise you will incorrectly place the bootloader at address (% style="color:blue" %)**0x08000000**(%%).
253
254 * For OTA_Tool, you can choose to use the (% style="color:blue" %)**OTA upgrade method**(%%), refer to the above upgrade steps in this user manual.
255
Mengting Qiu 50.1 256 [[image:image-20250122104151-4.png||height="318" width="673"]]
Xiaoling 20.2 257
Mengting Qiu 50.1 258 * Of course, if you have a USB-TTL adapter, you can also choose to use the [[UART upgrade method>>https://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H3.2UpdateFirmware28Assumethedevicealreadyhaveabootloader29]] via OTA_Tool.
Xiaoling 20.2 259
Mengting Qiu 50.1 260 [[image:image-20250122104131-3.png||height="330" width="674"]]
Xiaoling 20.2 261
262
Edwin Chen 19.1 263 == 4.2 Where to find OTA Password? ==
264
Xiaoling 20.2 265
Edwin Chen 19.1 266 Each device has a shipped label with OTA Password which is 16 chars. like below. If user don't find this, please send us a photo for the device with Dev EUI to [[support@dragino.com>>mailto:support@dragino.com]] . and we will search the password for you.
267
268 [[image:image-20230519102907-2.png||height="286" width="580"]]
269
270
Edwin Chen 20.1 271 == 4.3 How about if i upgrade a crashed firmware via OTA update? ==
Edwin Chen 19.1 272
Edwin Chen 20.1 273
Xiaoling 20.2 274 OTA update is done via Bootloader and only change the firmware partition. So update a crash firmware via OTA update won't destroy bootloader and user can use OTA method to update again.
Edwin Chen 20.1 275
Xiaoling 20.2 276 (% style="color:red" %)**Here are notice:**
Edwin Chen 20.1 277
Xiaoling 20.2 278 ~1. OTA update frequency depend on the firmware frequency. If there is no frequency in the firmware. Bootloader will use EU868 as default frequency.
Edwin Chen 20.1 279
Xiaoling 20.2 280 2. OTA update require a reset or reactivate action. If the crash firmware doesn't have them work, user need to manuall push the physic reset button on the PCB or power off/on device.
281
282
Mengting Qiu 53.1 283 == 4.4 How to update the LA66 OTA Dongle V1.1 via mobile phone? ==
Edwin Chen 35.1 284
Mengting Qiu 53.1 285
286 [[image:image-20250122113225-5.png||height="259" width="615"]]
287
288 * If you have never downloaded LA66 OTA DongleV1.0 to your LA66, you can directly upgrade the LA66 OTA DongleV1.1 program from your phone using the following method.
289
Yi Wang 43.1 290 [[bootlooder>>url:https://wiki.dragino.com/xwiki/bin/download/Main/BLE%20Bluetooth%20Remote%20Configure/WebHome/LoRa_OTA_Bootloader_v1.4.bin?rev=1.1]] and [[OTA_firmware>>url:https://wiki.dragino.com/xwiki/bin/download/Main/BLE%20Bluetooth%20Remote%20Configure/WebHome/LA66%20OTA%20DONGLE%20v1.1.bin?rev=1.1]].
291
Yi Wang 42.1 292 Tool Download: [[Download link form Dropbox.>>https://www.dropbox.com/scl/fo/gyscmfn1s03oz3n8rif8w/AJW7JoMQsQ56dtlls2SNf9c?rlkey=3q2cxwriyzh26vuairx01yebc&st=be5jv92w&dl=0]] 
Yi Wang 41.1 293
Yi Wang 42.1 294 Operation instructions: [[Reference for operating procedures.>>https://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/#H3.1.3.3LA66upgrade]]
Yi Wang 41.1 295
Mengting Qiu 53.1 296 * If you have burned LA66 OTA DONGLE V1.0 for your LA66 according to previously existing instructions. Then you need to re-burn your LA66 boot loader first: [[LA66 USB LoRaWAN Adapter User Manual - DRAGINO>>url:https://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20USB%20LoRaWAN%20Adapter%20User%20Manual/#H1.10.2Updatemethod:A0ForLA66withoutbootloader]]
Mengting Qiu 50.1 297
Mengting Qiu 53.1 298 Please refer to FAQ 4.7 for detailed reasons.
Mengting Qiu 50.1 299
Mengting Qiu 53.1 300
Yi Wang 41.1 301 == 4.5 Will OTA update effect the Local LoRaWAN Network. ==
302
Edwin Chen 35.1 303 User can configure the OTA_Frequency.txt file to change the Update frequency point so it won't conflict with the general LoRa Frequency. See below for the file as reference and explain. The OTA update also use a none-use SF (SF=5) which won't conflict with the current use SF.
304
305 (% class="mark" %)#Define the OTA frequency use for OTA.
306 #End Node has FRE1 and SF=5. So don't change FRE1 settings
307 #FRE2 include several frequencies point.
308 #PC first use FRE1 to create connection to end node, then use one of FRE2 frequencies to process downlink.
309
310 (% class="mark" %)#Format:
311 #Frequency Band;FRE1;FRE2
312 EU868;869.0;868.7,868.9
313 IN865;866.9;865.1,865.3
314 KZ865;866.5;866.1,866.3
315 KR920;921.7;921.3,921.5
316 MA869;870.5;870.7,870.9
317 US915;923.1;923.7,924.1
318 CN470;505.5;605.7,505.9
319 AU915;923.7;924.7,925.5
320 AS923;923.5;923.3,923.7
321 AS923-2;921.2;921.8,922.0
322 AS923-3;916.4;917.0,917.2
323 AS923-4;917.1;917.6,917.8
324 EU433;434.5;433.9,434.1
325 RU864;869.3;869.5,869.7
326
327
Mengting Qiu 50.1 328 == 4.6 The old version LA66 is different from the new version LA66. Can OTA_Tool be used for both versions? ==
329
330
331 The most obvious hardware difference between LA66 V1 and LA66v2 when burning is the presence of a "RESET "button, and the RESET operation is only for LA66 without a boot loader, you can refer to this link to learn how to upgrade LA66 without a boot loader:[[LA66 USB LoRaWAN Adapter User Manual - DRAGINO>>url:https://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20USB%20LoRaWAN%20Adapter%20User%20Manual/#H1.10.2Updatemethod:A0ForLA66withoutbootloader]]
332
Mengting Qiu 52.1 333 [[image:image-20250122134752-6.png||height="288" width="543"]]
334
Mengting Qiu 50.1 335 In summary, as long as your LA66 has a boot loader, either LA66 V1 or LA66 V2 can use OTA_Tool.
336
337
338 == 4.7 Why can't LA66 burn its own working firmware after it is used for OTA upgrade of -LB products? ==
339
340
341 We are sorry for the inadequacy of LA66 for OTA updates in the past.
342
343 * In the past, the download address of LA66 OTA DONGLE V1.0 was (% style="color:blue" %)**0x08000000**(%%), and the address of the bootloader that existed by default when the LA66 was shipped was also (% style="color:blue" %)**0x08000000**(%%).
344
345 Therefore, when you burn OTA_Firmwar v1.0 (LA66 OTA DONGLE v1.0) for the LA66 in order to use the LA66‘s ability to perform OTA upgrades for -LB products, the LA66’s bootloader is overridden.
346
347 So if you need to switch back to the LA66's working firmware, you'll need to refer to this [[link>>https://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20USB%20LoRaWAN%20Adapter%20User%20Manual/#H1.10.2Updatemethod:A0ForLA66withoutbootloader]] for instructions to burn firmware with a bootloader for the LA66.
348
349 [[image:image-20250122113225-5.png||height="336" width="798"]]
350
351 * For the new version of LA66 OTA DONGLE V1.1, we have changed the supported download address to (% style="color:blue" %)**0x0800D000**(%%) the same as other working firmware addresses, so you can simply use OTA_Tool to burn LA66 OTA DONGLE V1.1 and LA66 working firmware for LA66.
352
Edwin Chen 14.1 353 = 5. OTA Tool Known Bug: =
354
355
Xiaoling 10.2 356 ~1. If user click "(% style="color:blue" %)**Start**"(%%) but there is issue during update. User may need to close and open the tool again.
Edwin Chen 7.1 357
358
Edwin Chen 28.1 359