Lightsail satellite hangs due to 32Mb CSV file
planetary.org
planetary.org
Does anyone know more about this project, and the process it went through before launch?
Also, isn't there a watchdog circuit that would reboot if a heartbeat fails? I haven't worked in embedded controllers for many years but such things used to be common in embedded systems.
At least Atmel processors have them built in: http://www.embedds.com/using-watchdog-timer-in-your-projects...
I realize that the Lightsail is a bit more complicated but the principle remains valid.
Systems engineering 101 stuff, the watchdog is a fail safe on the software system. For those unfamiliar with a watchdog, think of it as STONITH for a single mode system, you design it with two copies of the operating system on two drives or partitions and then if the watchdog doesn't get a response from the computer it forces hard reboot and the system reboots using drive 2, and you send instructions to it to to check drive 1 or wipe it or whatever you want.