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	1	+BC660-GL module FOTA upgrade firmware

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	1	+Main.WebHome

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	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,
	10	+
	11	+[[image:1720682410182-594.png]]
	12	+
	13	+
	14	+[[image:1720682422086-684.png]]
	15	+
	16	+
	17	+[[image:1720682438315-576.png]]
	18	+No welding is required, just touch it with DuPont wire.
	19	+
	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
	24	+The device is starting to upgrade firmware, as shown in the following figure:
	25	+
	26	+[[image:1720682486714-234.png]]
	27	+
	28	+
	29	+Successfully upgrading firmware will prompt the following message:
	30	+
	31	+[[image:1720682517629-407.png]]
	32	+The firmware upgrade was successful.
	33	+
	34	+
	35	+You can use **AT+QGMR** to check the firmware version.
	36	+
	37	+[[image:1720682568103-178.png]]