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1 **Table of Contents: **
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3 {{toc/}}
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6 = 1. Overview =
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9 The current firmware for all BC660-GL modules is: (% style="color:blue" %)**BC660KGLAAR01A05 01.002.01.002**
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11 The latest firmware upgrade is: (% style="color:blue" %)**BC660KGLAAR01A05_01.203.01.203**
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13 You can use the (% style="color:blue" %)**AT+QGMR**(%%) command to query the firmware version.
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16 = 2. The method to upgrade the firmware of the NB module is as follows: =
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19 (% style="color:blue" %)**Step 1:**(%%) First, completely erase the program of the NBST module.
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22 (% style="color:blue" %)**Step 2:**(%%) The NB module needs to insert a SIM card and ensure network connectivity.
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25 (% style="color:blue" %)**Step 3:**(%%) Use TTL-USB serial port tool to connect TX and RX, GND of NBST,
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27 [[image:1720682410182-594.png]]
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30 [[image:1720682422086-684.png]]
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33 [[image:1720682438315-576.png]]
34 No welding is required, just touch it with DuPont wire.
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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.
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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.
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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,
43 The device is starting to upgrade firmware, as shown in the following figure:
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45 [[image:1720682486714-234.png]]
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48 Successfully upgrading firmware will prompt the following message:
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50 [[image:1720682517629-407.png]]
51 The firmware upgrade was successful.
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54 You can use (% style="color:#037691" %)**AT+QGMR** (%%)to check the firmware version.
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56 [[image:1720682568103-178.png]]
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