Write protecting / un-protecting a Mega 2560

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hi everybody!

i have built system after vivarium runing on mega 2560.

it monitors temperature , uses pwm control ceramic heater using 'dimmer' method, can fire humidifier, cooling systems, turn lights on , off etc etc.

i have written software runs on phone , connects in via bluetooth allow reading , writing of settings from/to eeprom.

so far good.

the next step considering allowing access on internet via web browser or dedicated app , here problem starts.

*if* make commercial venture want make absolutely sure cannot hacked (yeah know - there's possibility...).


so wondering if it's possible flick virtual switch makes board read , (probably using google authenticator) if ever need update can switch read/write mode.

i have sorts of checks in place raise alarms , turn down power in event of emergency of course changed if got hacked.

i can of course build seperate system monitor main 1 not internet enabled , throw kill switch i'm hoping avoid that.

thanks replies!

you close down microprocessor using fuse bit. after or else won't able read or write memory anymore (without using special high voltage programming device). way commercial products "secured". description seems don't have fear steel invention you're hacked on internet. that's not possible because cannot write arduino's flash on internet. drawback clear also: not able update device too.


Arduino Forum > Using Arduino > Microcontrollers > Write protecting / un-protecting a Mega 2560


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