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LSN50 LoRa Sensor Node User Manual 39 / 60
4. Upload Firmware
Notes:
- Since image v1.3, the firmware will show version info during boot. If your device doesn’t
show version info, you may have a very old image version.
- Always run AT+FDR to reset parameters to factory default after an update image.
If the update is from image >= v1.3 to another image version >=v1.3, then the keys will
be kept after running AT+FDR.
Otherwise (e.g. from v1.2 to v1.3), AT+FDR may erase the keys.
4.1 Upload Firmware via Serial Port
The LSN50’s AT Command port can be used for firmware upgrade. The hardware connection
for upgrade firmware is as below:
Step1: Download flash loader.
Step2: Download the LSN50 Image files.
Step3: Open flashloader; choose the correct COM port to update
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