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Last modified by Mengting Qiu on 2025/06/17 09:18
From version 51.1
edited by Mengting Qiu
on 2025/01/22 13:47
Change comment: Uploaded new attachment "image-20250122134752-6.png", version {1}
To version 49.1
edited by Mengting Qiu
on 2025/01/22 11:32
Change comment: Uploaded new attachment "image-20250122113225-5.png", version {1}

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126 126  
127 127  = 4. FAQ =
128 128  
129 -== 4.1 OTA_Tool supports two upgrade methods for -LB products. ==
129 +== 4.1 Can i use other devices to connect to PC if i don't have LA66 USB? ==
130 130  
131 131  
132 -* For OTA_Tool, you can choose to use the OTA upgrade method, refer to the above upgrade steps in this user manual.
132 +If user doesn't have LA66 USB Adapter, they can still use other Dragino Device to connect to PC for OTA update.
133 133  
134 -[[image:image-20250122104151-4.png||height="318" width="673"]]
134 +(% style="color:blue" %)**Steps:**
135 135  
136 -* 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.
136 +* Find the suitable mode which base on LA66 chip ( All LoRaWAN model with LB or LS suffix , such as SN50v3-LB)
137 137  
138 -[[image:image-20250122104131-3.png||height="330" width="674"]]
138 +* Update the LA66 USB OTA firmware to the device.
139 139  
140 +* Connect the device to PC via UART interface.
140 140  
142 +* Make sure power off or update the firmware back to original firmware , because the LA66 USB OTA fimware is not low power consumption firmware. it will consume the battery very fast.
143 +
141 141  == 4.2 Where to find OTA Password? ==
142 142  
143 143  
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166 166  
167 167  Operation instructions: [[Reference for operating procedures.>>https://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/#H3.1.3.3LA66upgrade]]
168 168  
169 -
170 -
171 171  == 4.5 Will OTA update effect the Local LoRaWAN Network. ==
172 172  
173 173  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.
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195 195  RU864;869.3;869.5,869.7
196 196  
197 197  
198 -== 4.6 The old version LA66 is different from the new version LA66. Can OTA_Tool be used for both versions? ==
199 -
200 -
201 -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]]
202 -
203 -In summary, as long as your LA66 has a boot loader, either LA66 V1 or LA66 V2 can use OTA_Tool.
204 -
205 -
206 -== 4.7 Why can't LA66 burn its own working firmware after it is used for OTA upgrade of -LB products? ==
207 -
208 -
209 -We are sorry for the inadequacy of LA66 for OTA updates in the past.
210 -
211 -* 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**(%%).
212 -
213 -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.
214 -
215 -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.
216 -
217 -[[image:image-20250122113225-5.png||height="336" width="798"]]
218 -
219 -* 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.
220 -
221 -
222 222  = 5. OTA Tool Known Bug: =
223 223  
224 224  
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