Wiki source code of OTA Update Firmware/Configure for Sensors

Version 78.1 by Mengting Qiu on 2025/02/19 10:17

version	line-number	content
8.1	1	Table of Contents:
	2
	3	{{toc/}}
	4
	5
11.2	6
10.2	7	= 1. Overview =
1.1	8
10.2	9
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).
1.1	11
23.1	12	User can use the OTA update to update the configure file or firmware to the sensors.
1.1	13
23.1	14
10.2	15	= 2. Support Models =
	16
	17
1.1	18	Here list the models that support OTA Update.
	19
	20	{{velocity}}
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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" %)
2.1	61
10.2	62	= 3. How to do OTA update =
	63
	64	== 3.1 Required Components ==
	65
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]].
29.1	67	* Software: [[OTA_Tool>>https://www.dropbox.com/scl/fo/9kqeqf6wmet10o9hgxuwa/h?rlkey=4ikrg6kg5v0yjxwhp0i37wrv7&dl=0]]. Only support Windows now
7.1	68
16.1	69	[[image:image-20230513120722-2.png\|\|height="409" width="866"]]
7.1	70
14.1	71
57.1	72	== 3.2 OTA Update Firmware via Mobile Phone + LA66 ==
10.2	73
75.1	74	=== 3.2.1 LA66 upgrade ===
10.2	75
75.1	76	The LA66 USB connects to the phone via the USB-Type C adapter.
57.1	77
75.1	78	[[image:image-20250214161955-7.png]]
70.2	79
	80
75.1	81	After the connection is successful, the phone will pop up a prompt box, check it, and click to "OK".
70.2	82
78.1	83	(% style="color:red" %)Note: (%%)Some mobile phone models need to manually enable the OTG function to properly identify external devices.
70.2	84
75.1	85	[[image:image-20250214162012-8.png]]
70.2	86
	87
	88	(% class="wikigeneratedid" id="H-1" %)
70.4	89	Then, the Device Tool will automatically jump to the main interface of the tool.
70.2	90
	91	(% class="wikigeneratedid" %)
75.1	92	In the upper left corner of the main interface of the software, click (% _mstmutation="1" style="color:blue" %)"Upgrade Device"(%%) and select the "(% _mstmutation="1" style="color:blue" %)LaA66"(%%) type.
70.2	93
	94	(% class="wikigeneratedid" %)
75.1	95	[[image:image-20250219095423-2.png]]
70.2	96
	97	(% class="wikigeneratedid" %)
75.1	98	Follow the steps in order:
70.2	99
	100	(% class="wikigeneratedid" %)
75.1	101	① Click "SELECT UPGRADE FILE" to choose the firmware to upgrade.
70.2	102
	103	(% class="wikigeneratedid" %)
75.1	104	② After clicking Start, wait for the LA66 to burn in
70.2	105
	106	(% class="wikigeneratedid" %)
75.1	107	[[image:image-20250214162029-9.png]]
70.2	108
	109	(% class="wikigeneratedid" %)
70.5	110	(% style="color:red" %)Note:
70.2	111
	112	(% class="wikigeneratedid" %)
75.1	113	~1. In order to ensure that the LA66 USB works properly, make sure that there is a corresponding bootloader before updating the firmware.
70.2	114
70.5	115	(% class="wikigeneratedid" %)
75.1	116	2. 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]], then 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.
70.5	117
70.2	118
75.1	119	When the upgrade is complete, it will prompt:"update successfully".
70.2	120
78.1	121	[[image:image-20250219100549-3.png\|\|height="484" width="362"]]
70.2	122
	123
75.1	124	=== 3.2.2 LB series ===
70.2	125
75.1	126	* Upgrade of external tools: LA66 USB
	127	[[image:image-20250214161740-1.png]][[image:image-20250214161758-2.png]]
	128	* Before using LA66 as a firmware burning tool for -LB products, you need to burn OTA_DONGLE for LA66 first.
78.1	129	* Click to get [[OTA_DONGLE V1.1.>>https://www.dropbox.com/scl/fo/ztlw35a9xbkomu71u31im/ALF3WtzilGPi-2nOdtQw1Z4/Utility/Sensor%20Manager%20Utility/OTA_Firmware?dl=0&rlkey=ojjcsw927eaow01dgooldq3nu&subfolder_nav_tracking=1]]
70.2	130
75.1	131	[[image:image-20250219094223-1.png\|\|height="324" width="698"]]
70.2	132
78.1	133	* Refer to [[Section 3.2.1>>\|\|anchor="H3.2.1LA66upgrade"]] to burn OTA DONGLEV1.1 for LA66.
70.2	134
78.1	135
75.1	136	The LA66 USB connects to the phone via the USB-Type c adapter.
70.2	137
75.1	138	[[image:image-20250214161844-3.png]]
70.2	139
	140
75.1	141	After the connection is successful, the phone will pop up a prompt box, check it and click to confirm.
70.2	142
75.1	143	(% style="color:red" %)Note:(%%)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.
70.2	144
75.1	145	[[image:image-20250214161907-4.png]]
	146
	147
70.2	148	(% class="wikigeneratedid" id="H-1" %)
70.5	149	Then, the Device Tool will automatically jump to the main interface of the tool.
70.2	150
	151	(% class="wikigeneratedid" %)
75.1	152	In the upper left corner of the main interface of the software, click (% _mstmutation="1" style="color:blue" %)"Upgrade Device"(%%) and select the LB type.
70.5	153
	154	(% class="wikigeneratedid" %)
78.1	155	[[image:image-20250219100821-4.png]]
	156
	157
	158	(% class="wikigeneratedid" %)
70.2	159	Follow the steps in order:
	160
	161	(% class="wikigeneratedid" %)
78.1	162	① Enter the DUIEI,.
70.2	163
	164	(% class="wikigeneratedid" %)
78.1	165	② Enter the PIN (the PIN is the last 8 bytes of APPSKEY, It's 16 characters in total).
70.2	166
	167	(% class="wikigeneratedid" %)
78.1	168	③ Select the LoRa frequency to match the original frequency of the node.
70.2	169
	170	(% class="wikigeneratedid" %)
75.1	171	④ Choose the upgrade file,(% style="color:red" %)(The firmware upgrade file format only supports .bin files)
70.2	172
	173	(% class="wikigeneratedid" %)
78.1	174	⑤ Press the reset button of the device to be upgraded and click "Start".
70.2	175
70.5	176	(% class="wikigeneratedid" %)
75.1	177	(% style="color:red" %)Note:
70.2	178
	179	(% class="wikigeneratedid" %)
78.1	180	~1. If you are unable to access the upgrade for an extended period of time, you can perform the device reset step again.
70.2	181
75.1	182	(% class="wikigeneratedid" %)
78.1	183	2. If you do not want to open the cover of the device to be upgraded, you can hold down the ACT key for 5s until the device blinks green. This action is the equivalent of pressing the reset button.
70.5	184
75.1	185	[[image:image-20250214161928-5.png]]
70.5	186
70.2	187
75.1	188	(% class="wikigeneratedid" id="H-2" %)
	189	When the upgrade is complete, it will prompt:"update successfully".
70.2	190
75.1	191	[[image:image-20250214161941-6.png]]
70.2	192
75.1	193
57.1	194	== 3.3 OTA Update Firmware via PC ==
	195
	196
21.1	197	(% class="wikigeneratedid" %)
24.1	198	(% class="mark text-uppercase" %)Video Instruction:(%%) ~-~- OTA Upgrade Firmware (via LoRa) of LoRaWAN Sensors: [[https:~~/~~/youtu.be/SSvOqvBrwGg>>https://youtu.be/SSvOqvBrwGg]]
21.1	199
	200
30.1	201	=== (% style="color:blue" %)Step1:(%%) Plug LA66 USB to PC and run OTA_Tool. ===
10.2	202
	203
40.1	204	[[image:image-20250121091115-1.png]]
7.1	205
	206
10.2	207	=== (% style="color:blue" %)Step2:(%%) Set up OTA Tool ===
7.1	208
	209
27.1	210	* (% style="color:blue" %)DevEUI(%%): Input DevEUI of your sensor
10.2	211
56.1	212	* (% style="color:blue" %)Password(%%): Passord of your sensor(Last eight bytes/ Last 16 characters of APPSKEY)
10.2	213
	214	* (% style="color:blue" %)Port(%%): Com port of LA66 USB
	215
	216	* (% style="color:blue" %)LoRa_Freq(%%): Choose the shipped frequency band of your sensor.
	217
	218	* (% 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.
	219
45.1	220	* (% 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:
10.2	221
7.1	222	[[image:image-20230114174640-3.png\|\|height="130" width="1169"]]
	223
	224
40.1	225	=== (% style="color:blue" %)Step3:(%%) After re-plugging the LA66 USB, click "Start" in the OTA tool. ===
7.1	226
10.2	227
40.1	228	Upon re-plugging, the LA66 USB will reboot and broadcast the update process using the Dev EUI and passcode
7.1	229
	230
10.2	231	=== (% style="color:blue" %)Step4: (%%)Press reset button on the end node, or re-activate the end node. ===
7.1	232
40.1	233	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.
10.2	234
40.1	235	[[image:image-20250121093705-3.png]]
	236
7.1	237	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.
	238
	239
10.2	240	=== (% style="color:blue" %)Step5:(%%) Check result. ===
7.1	241
10.2	242
7.1	243	Below shows the update successul result.
	244
40.1	245	[[image:image-20250121093834-4.png]]
7.1	246
	247
14.1	248	= 4. FAQ =
7.1	249
50.1	250	== 4.1 OTA_Tool supports two upgrade methods for -LB products. ==
14.1	251
	252
54.1	253	(% style="color:red" %)Note: The premise of using OTA_Tool is that all your devices have bootloaders.
20.2	254
54.1	255	(% style="color:red" %)1. (%%)Only devices with bootloader can perform OTA upgrades(OTA upgrade method).
	256
	257	(% 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(%%).
	258
	259	* 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.
	260
50.1	261	[[image:image-20250122104151-4.png\|\|height="318" width="673"]]
20.2	262
50.1	263	* 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.
20.2	264
50.1	265	[[image:image-20250122104131-3.png\|\|height="330" width="674"]]
20.2	266
	267
19.1	268	== 4.2 Where to find OTA Password? ==
	269
20.2	270
19.1	271	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.
	272
	273	[[image:image-20230519102907-2.png\|\|height="286" width="580"]]
	274
	275
20.1	276	== 4.3 How about if i upgrade a crashed firmware via OTA update? ==
19.1	277
20.1	278
20.2	279	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.
20.1	280
20.2	281	(% style="color:red" %)Here are notice:
20.1	282
20.2	283	~1. OTA update frequency depend on the firmware frequency. If there is no frequency in the firmware. Bootloader will use EU868 as default frequency.
20.1	284
20.2	285	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.
	286
	287
53.1	288	== 4.4 How to update the LA66 OTA Dongle V1.1 via mobile phone? ==
35.1	289
53.1	290
	291	[[image:image-20250122113225-5.png\|\|height="259" width="615"]]
	292
	293	* 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.
	294
43.1	295	[[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]].
	296
42.1	297	Tool Download: [[Download link form Dropbox.>>https://www.dropbox.com/scl/fo/gyscmfn1s03oz3n8rif8w/AJW7JoMQsQ56dtlls2SNf9c?rlkey=3q2cxwriyzh26vuairx01yebc&st=be5jv92w&dl=0]]
41.1	298
42.1	299	Operation instructions: [[Reference for operating procedures.>>https://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/#H3.1.3.3LA66upgrade]]
41.1	300
53.1	301	* 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]]
50.1	302
53.1	303	Please refer to FAQ 4.7 for detailed reasons.
50.1	304
53.1	305
41.1	306	== 4.5 Will OTA update effect the Local LoRaWAN Network. ==
	307
35.1	308	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.
	309
	310	(% class="mark" %)#Define the OTA frequency use for OTA.
	311	#End Node has FRE1 and SF=5. So don't change FRE1 settings
	312	#FRE2 include several frequencies point.
	313	#PC first use FRE1 to create connection to end node, then use one of FRE2 frequencies to process downlink.
	314
	315	(% class="mark" %)#Format:
	316	#Frequency Band;FRE1;FRE2
	317	EU868;869.0;868.7,868.9
	318	IN865;866.9;865.1,865.3
	319	KZ865;866.5;866.1,866.3
	320	KR920;921.7;921.3,921.5
	321	MA869;870.5;870.7,870.9
	322	US915;923.1;923.7,924.1
	323	CN470;505.5;605.7,505.9
	324	AU915;923.7;924.7,925.5
	325	AS923;923.5;923.3,923.7
	326	AS923-2;921.2;921.8,922.0
	327	AS923-3;916.4;917.0,917.2
	328	AS923-4;917.1;917.6,917.8
	329	EU433;434.5;433.9,434.1
	330	RU864;869.3;869.5,869.7
	331
	332
50.1	333	== 4.6 The old version LA66 is different from the new version LA66. Can OTA_Tool be used for both versions? ==
	334
	335
	336	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]]
	337
52.1	338	[[image:image-20250122134752-6.png\|\|height="288" width="543"]]
	339
50.1	340	In summary, as long as your LA66 has a boot loader, either LA66 V1 or LA66 V2 can use OTA_Tool.
	341
	342
	343	== 4.7 Why can't LA66 burn its own working firmware after it is used for OTA upgrade of -LB products? ==
	344
	345
	346	We are sorry for the inadequacy of LA66 for OTA updates in the past.
	347
	348	* 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(%%).
	349
	350	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.
	351
	352	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.
	353
	354	[[image:image-20250122113225-5.png\|\|height="336" width="798"]]
	355
	356	* 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.
	357
14.1	358	= 5. OTA Tool Known Bug: =
	359
	360
10.2	361	~1. If user click "(% style="color:blue" %)Start"(%%) but there is issue during update. User may need to close and open the tool again.
7.1	362
	363
28.1	364

Wiki source code of OTA Update Firmware/Configure for Sensors

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