thatoneguy
- Joined Feb 19, 2009
- 6,359
You don't even need a dongle, depending on how much needs to be changed.
Several of the PIC 18F Series can write to program memory, changing their own program. If one with a USB host or Ethernet client is chosen, then the updates could be sent as an encrypted file, and it would read/load/verify and be on it's merry way.
However, MUCH more information would be needed on the application. Number of units in field? How much variation between installations? How much you could make by sending them a new box with the latest firmware customized for their operation, and they send the "old one" back, which you would simply re-flash and send out again.
Are you using code protection/protocol encryption?
There are many, many details like that to research, goal is profit and customer satisfaction. Those two are NOT Mutually exclusive!
Several of the PIC 18F Series can write to program memory, changing their own program. If one with a USB host or Ethernet client is chosen, then the updates could be sent as an encrypted file, and it would read/load/verify and be on it's merry way.
However, MUCH more information would be needed on the application. Number of units in field? How much variation between installations? How much you could make by sending them a new box with the latest firmware customized for their operation, and they send the "old one" back, which you would simply re-flash and send out again.
Are you using code protection/protocol encryption?
There are many, many details like that to research, goal is profit and customer satisfaction. Those two are NOT Mutually exclusive!
