I'm having trouble installing firmware on a NanoStation loco M5 (XM). What should I try next?
I followed the First Install directions. After putting the NanoStation into TFTP mode, it responds to ping. TFTP transfer appears to be progressing: the LAN1 LED flickers rapidly, and the tftp2 progress bar moves steadily. But the transfer ultimately fails. The NanoStation LAN1 LED flickers for a few more seconds, and then the flashing 1-3, 2-4, 1-3, 2-4 pattern resumes. After 3 retries, tftp2 says "Unable to get responses from the server."
I can successfully install Ubiquiti airOS using the same procedure, except of course with the file XM.v6.3.5.33321.210716.1345.bin from Ubiquiti.
The airOS main status page shows Version: v6.3.5 (XM). The date code on the sticker is 1340K. I ran the TFTP clients on Windows 10. I tried both Windows' tftp command line and tftp2. I tried the AREDN firmware files aredn-3.21.4.0-ar71xx-ubnt-bullet-m-factory.bin and aredn-3.21.4.0-ar71xx-ubnt-loco-m-xw-factory.bin.
This procedure doesn't work with recent versions of airOS, nor with XM.v5.6.15-sign-cpu400.31612.170908.1458.bin (note that name contains "-sign"). Attempting to upload AREDN firmware elicits an error message saying it refuses to install untrusted software.