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1		-
	1	+**Table of Contents: **
2	2
3		-The current firmware for all BC660-GL modules is: BC660KGLAAR01A05 01.002.01.002
4		-The latest firmware upgrade is: BC660KGLAAR01A05_01.203.01.203
5		-You can use the AT+QGMR command to query the firmware version
6		-The method to upgrade the firmware of the NB module is as follows:
7		-Step 1: First, completely erase the program of the NBST module.
8		-Step 2: The NB module needs to insert a SIM card and ensure network connectivity.
9		-Step 3: Use TTL-USB serial port tool to connect TX and RX, GND of NBST,
	3	+{{toc/}}
10	10
	5	+
	6	+= 1. Overview =
	7	+
	8	+
	9	+The current firmware for all BC660-GL modules is: (% style="color:blue" %)**BC660KGLAAR01A05 01.002.01.002**
	10	+The latest firmware upgrade is: (% style="color:blue" %)**BC660KGLAAR01A05_01.203.01.203**
	11	+You can use the (% style="color:blue" %)**AT+QGMR**(%%) command to query the firmware version.
	12	+
	13	+=
	14	+2. The method to upgrade the firmware of the NB module is as follows: =
	15	+
	16	+
	17	+**Step 1:** First, completely erase the program of the NBST module.
	18	+
	19	+
	20	+**Step 2:** The NB module needs to insert a SIM card and ensure network connectivity.
	21	+
	22	+
	23	+**Step 3:** Use TTL-USB serial port tool to connect TX and RX, GND of NBST,
	24	+
11	11	[[image:1720682410182-594.png]]
12	12
13	13
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18	18	No welding is required, just touch it with DuPont wire.
19	19
20	20
21		-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.
22		-Step 5: After opening the serial port, send the AT+QIDNSCFG=0, "223.5.5.5", "8.8.8.8" commands and return OK
23		-Send AT+QFOTADL again= http:~/~/repo.dragino.com/release/NB/Update_BC660KGLAAR01A05_01.002.01.002-R01A05_01.203.01.203.zip command
	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.
	36	+
	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,
24	24	The device is starting to upgrade firmware, as shown in the following figure:
25	25
26	26	[[image:1720682486714-234.png]]
...	...	@@ -35,3 +35,5 @@
35	35	You can use **AT+QGMR** to check the firmware version.
36	36
37	37	[[image:1720682568103-178.png]]
	54	+
	55	+