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3	3	{{toc/}}
4	4
5	5
6		-
7		-
8	8	= 1. Overview =
9	9
10	10
11	11	The current firmware for all BC660-GL modules is: (% style="color:blue" %)**BC660KGLAAR01A05 01.002.01.002**
12		-
13	13	The latest firmware upgrade is: (% style="color:blue" %)**BC660KGLAAR01A05_01.203.01.203**
14		-
15	15	You can use the (% style="color:blue" %)**AT+QGMR**(%%) command to query the firmware version.
16	16
	13	+=
	14	+2. The method to upgrade the firmware of the NB module is as follows: =
17	17
18		-= 2. The method to upgrade the firmware of the NB module is as follows: =
19	19
	17	+**Step 1:** First, completely erase the program of the NBST module.
20	20
21		-(% style="color:blue" %)**Step 1:**(%%) First, completely erase the program of the NBST module.
22	22
	20	+**Step 2:** The NB module needs to insert a SIM card and ensure network connectivity.
23	23
24		-(% style="color:blue" %)**Step 2:**(%%) The NB module needs to insert a SIM card and ensure network connectivity.
25	25
	23	+**Step 3:** Use TTL-USB serial port tool to connect TX and RX, GND of NBST,
26	26
27		-(% style="color:blue" %)**Step 3:**(%%) Use TTL-USB serial port tool to connect TX and RX, GND of NBST,
28		-
29	29	[[image:1720682410182-594.png]]
30	30
31	31
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36	36	No welding is required, just touch it with DuPont wire.
37	37
38	38
39		-(% 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.
	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.
40	40
41	41
42		-(% 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.
43		-
44		-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,
	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,
45	45	The device is starting to upgrade firmware, as shown in the following figure:
46	46
47	47	[[image:1720682486714-234.png]]
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53	53	The firmware upgrade was successful.
54	54
55	55
56		-You can use (% style="color:#037691" %)**AT+QGMR** (%%)to check the firmware version.
	51	+You can use **AT+QGMR** to check the firmware version.
57	57
58	58	[[image:1720682568103-178.png]]
59	59