When the MT-5700 module is connected to the network, execute the AT command to start remote module firmware flashing.
AT^FOTAOEMDL="http://fota.lazyc.at/b21/"
Enter
AT^FOTADLQ
to check the download status. The last number is the current download progress, and the second-to-last number is the target size.
Enter
AT^FOTASTATE?
Enter AT^FOTASTATE? to check the update status. If it shows 40, the download is complete. If it shows 30, the download is still in progress.
Note: Wait for the download to finish before proceeding to the next step.
Enter
AT^FWUP
The module will automatically reboot and perform the update.
Simply wait for the module to restart after flashing, and you will see that the b21 firmware upgrade was successful.
Using AT commands to flash firmware online on the 5700 module is convenient and fast. It eliminates the hassle of disassembling the module and using an adapter board for upgrades, and also prevents loosening caused by frequent insertion and removal of the module's connector.