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6	6	= 1. Overview =
7	7
8	8
9		-The current firmware for all BC660-GL modules is: (% style="color:blue" %)**BC660KGLAAR01A05 01.002.01.002**
	9	+The current firmware for all BC660-GL modules is: **BC660KGLAAR01A05 01.002.01.002**
	10	+The latest firmware upgrade is: **BC660KGLAAR01A05_01.203.01.203**
	11	+You can use the **AT+QGMR** command to query the firmware version.
10	10
11		-The latest firmware upgrade is: (% style="color:blue" %)**BC660KGLAAR01A05_01.203.01.203**
	13	+=
	14	+2. The method to upgrade the firmware of the NB module is as follows: =
12	12
13		-You can use the (% style="color:blue" %)**AT+QGMR**(%%) command to query the firmware version.
14	14
	17	+**Step 1:** First, completely erase the program of the NBST module.
15	15
16		-= 2. The method to upgrade the firmware of the NB module is as follows: =
17	17
	20	+**Step 2:** The NB module needs to insert a SIM card and ensure network connectivity.
18	18
19		-(% style="color:blue" %)**Step 1:**(%%) First, completely erase the program of the NBST module.
20	20
	23	+**Step 3:** Use TTL-USB serial port tool to connect TX and RX, GND of NBST,
21	21
22		-(% style="color:blue" %)**Step 2:**(%%) The NB module needs to insert a SIM card and ensure network connectivity.
23		-
24		-
25		-(% style="color:blue" %)**Step 3:**(%%) Use TTL-USB serial port tool to connect TX and RX, GND of NBST,
26		-
27	27	[[image:1720682410182-594.png]]
28	28
29	29
...	...	@@ -34,12 +34,11 @@
34	34	No welding is required, just touch it with DuPont wire.
35	35
36	36
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.
	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.
38	38
39	39
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,
	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,
43	43	The device is starting to upgrade firmware, as shown in the following figure:
44	44
45	45	[[image:1720682486714-234.png]]
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51	51	The firmware upgrade was successful.
52	52
53	53
54		-You can use (% style="color:#037691" %)**AT+QGMR** (%%)to check the firmware version.
	51	+You can use **AT+QGMR** to check the firmware version.
55	55
56	56	[[image:1720682568103-178.png]]
57	57