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8	8
9	9	The current firmware for all BC660-GL modules is: (% style="color:blue" %)**BC660KGLAAR01A05 01.002.01.002**
	10	+
10	10	The latest firmware upgrade is: (% style="color:blue" %)**BC660KGLAAR01A05_01.203.01.203**
	12	+
11	11	You can use the (% style="color:blue" %)**AT+QGMR**(%%) command to query the firmware version.
12	12
13		-=
14		-2. The method to upgrade the firmware of the NB module is as follows: =
15	15
	16	+= 2. The method to upgrade the firmware of the NB module is as follows: =
16	16
17		-**Step 1:** First, completely erase the program of the NBST module.
18	18
	19	+(% style="color:blue" %)**Step 1:**(%%) First, completely erase the program of the NBST module.
19	19
20		-**Step 2:** The NB module needs to insert a SIM card and ensure network connectivity.
21	21
	22	+(% style="color:blue" %)**Step 2:**(%%) The NB module needs to insert a SIM card and ensure network connectivity.
22	22
23		-**Step 3:** Use TTL-USB serial port tool to connect TX and RX, GND of NBST,
24	24
	25	+(% style="color:blue" %)**Step 3:**(%%) Use TTL-USB serial port tool to connect TX and RX, GND of NBST,
	26	+
25	25	[[image:1720682410182-594.png]]
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27	27
...	...	@@ -32,11 +32,12 @@
32	32	No welding is required, just touch it with DuPont wire.
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34	34
35		-**Step 4:** The device needs to be powered on, open the serial port debugging tool, connect the COM of the USB serial port with a baud rate of 115200, and then perform FOTA firmware upgrade.
	37	+(% style="color:blue" %)**Step 4:**(%%) The device needs to be powered on, open the serial port debugging tool, connect the COM of the USB serial port with a baud rate of 115200, and then perform FOTA firmware upgrade.
36	36
37	37
38		-**Step 5:** After opening the serial port, send the **AT+QIDNSCFG=0, "223.5.5.5", "8.8.8.8"** commands,  return OK.
39		-Send **AT+QFOTADL again= http:~/~/repo.dragino.com/release/NB/Update_BC660KGLAAR01A05_01.002.01.002-R01A05_01.203.01.203.zip** command,
	40	+(% style="color:blue" %)**Step 5:**(%%) After opening the serial port, send the (% style="color:#037691" %)**AT+QIDNSCFG=0, "223.5.5.5", "8.8.8.8"**(%%) commands,  return OK.
	41	+
	42	+Send (% style="color:#037691" %)**AT+QFOTADL again= http:~/~/repo.dragino.com/release/NB/Update_BC660KGLAAR01A05_01.002.01.002-R01A05_01.203.01.203.zip**(%%) command,
40	40	The device is starting to upgrade firmware, as shown in the following figure:
41	41
42	42	[[image:1720682486714-234.png]]
...	...	@@ -48,7 +48,7 @@
48	48	The firmware upgrade was successful.
49	49
50	50
51		-You can use **AT+QGMR** to check the firmware version.
	54	+You can use (% style="color:#037691" %)**AT+QGMR** (%%)to check the firmware version.
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53	53	[[image:1720682568103-178.png]]
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