Three days ago, I uploaded and ran a firmware to our waspmotes with OTA and they did work fine during the days. However, when I tried to upload another firmware today, I encountered a problem: I could not upload a new firmware to the mote.
What kind of message did appear?
I could still find the nodes with "-scan_nodes" command but "-get_boot_list" command did not work properly. If I sent any new firmware to waspmote, I could see that the gateway LED blinked and the RSSI LED on wasomote flashed. However, "-get_boot_list" command could not find the new firmware, it directly returned a result telling us that the firmware number in SD is zero. Actually, some old firmwares were indeed inside the SD.
We are aware of this issue. We are working on the solution, but it is hoped to be solved in a few weeks.