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62	62	= 4. How to solve =
63	63
64	64
65		-== 4.1 Method 1: Erase the chip before upgrading the firmware ==
	65	+Users can manually query the password via STM32CubeProgrammer.
66	66
67	67
68		-The user can choose to erase all contents before upgrading the firmware and then burn the new version of the firmware. The user can still use the original password, but this method will restore all configurations to the default firmware Settings.
	68	+== 4.1 UART connection and firmware update methods ==
69	69
70		-The chip can only be erased by updating the firmware through the UART TTL interface. See [[UART Connection>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H2.3UARTConnectionforSN50v3basemotherboard]].
71	71
72		-Method of erasing full chip flash memory
	71	+Users can query passwords only using the UART interface via the STM32CubeProgrammer.
73	73
74		-* Connect to the STM32CubeProgrammer
	73	+See **[[UART Connection>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H2.3UARTConnectionforSN50v3basemotherboard]]**.
75	75
76		-[[image:image-20240827164813-1.png||height="457" width="791"]]
	75	+update firmware through UART TTL interface :** [[Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART_Access_for_NB_ST_BC660K-GL/#H4.2UpdateFirmware28Assumethedevicealreadyhaveabootloader29]]**.
77	77
78		-* Select Erase full chip flash memory
79	79
80		-[[image:image-20240827165549-2.png||height="462" width="800"]]
	78	+== 4.2 query the password via STM32CubeProgrammer ==
81	81
82	82
83		-After the erase is complete, download the new firmware directly.
	81	+Users can use the password address to query the password through STM32CubeProgrammer.
84	84
85		-* update firmware through UART TTL interface : **[[Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART_Access_for_NB_ST_BC660K-GL/#H4.2UpdateFirmware28Assumethedevicealreadyhaveabootloader29]]**.
86		-
87		-== 4.2 Method 2: Update the firmware directly and query the password via STM32CubeProgrammer ==
88		-
89		-
90		-If you do not want to erase the chip flash memory, you can also use the password address to query the password through STM32CubeProgrammer.
91		-
92	92	* The password address for old firmware(without FDR1 function) : **0x08019000**
93	93	* The password address for new firmware(with FDR1 function) : **0x08025D00**
94	94
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102	102	* Click "Device memory", enter **0x08019000** in "Address", and click "Read"
103	103	* Find the 0x08019000 address field and then read the current password as shown in the screenshot below.
104	104
105		-[[image:image-20240827171901-3.png||height="562" width="973"]]
	96	+[[image:image-20240827171901-3.png||height="528" width="912"]]
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107	107
108	108	**Procedure for querying the password(new firmware):**
109	109
110		-Refer to the old and new firmware division above, and run the firmware first after updating the firmware.
	101	+Refer to [[the old and new firmware division>>http://wiki.dragino.com/xwiki/bin/view/Why%20can%27t%20the%20password%20access%20AT%20command%20after%20upgrade%28-NB%29%3F/#H3.A0VersionConfirmation]] above, and run the firmware first after updating the firmware.
111	111
	103	+* After the firmware upgrade is complete, switch back to the FLASH and reset the node to run the new firmware once.
	104	+* Then place the switch at the ISP and connect to the STM32CubeProgrammer (same as when burning the firmware).
	105	+* Click "Device memory", enter **0x08019000** in "Address", and click "Read"
	106	+* Find the 0x08019000 address field and then read the current password as shown in the screenshot below.
112	112
	108	+[[image:image-20240827180414-1.png||height="527" width="910"]]
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119		-
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