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I'm now designing a weather meter to measure the weather in my area. The control board of the meter I'm designing will take the data from the probe and send back to the main station through a FM transceiver. Since the task is pretty simple so I want to use the ATtiny13 microcontroller to handle it because the size of the controller is small and its simplicity. But I worry about its reliability since I want the device to run at least 10-20 year only 1-2 downtime per year at worst.

So I want to ask if the ATtiny13 is reliable for long term project like this. The weather is not really extreme, the temperature is around 0 to 50°C and it will be encased in epoxy so humidity is not a problem.

Edit: the ATtiny13 is only to regulate the board like when to send data back or execute the command it received. All the probe and the FM transceiver (not transmitter, sorry) is sperate device, not a part of the control board.

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    \$\begingroup\$ Changed your link to Google to the actual link to the manufacturer's product page! \$\endgroup\$ Mar 21, 2023 at 16:20
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    \$\begingroup\$ The biggest concern isn't the reliability of the microcontroller, but the reliability of your firmware. \$\endgroup\$ Mar 21, 2023 at 16:20
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    \$\begingroup\$ And of the analog components outside your microcontroller. \$\endgroup\$ Mar 21, 2023 at 16:21
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    \$\begingroup\$ No more or less than any other Atmel. It's made on the same process after all. \$\endgroup\$
    – DKNguyen
    Mar 21, 2023 at 16:35
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    \$\begingroup\$ again, FM is an analog modulation; could you specific about what it does to transport digital data? That's not obvious to me (and I'm a comms engineer…). \$\endgroup\$ Mar 21, 2023 at 16:50

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After some discussion in the comment section of the question, I think the ATtiny13 is reliable enough for this purpose.

  • The task is not too demanding, not much imformation to be processed
  • Most of the signals are digital and there are not many signals to read
  • The write time is low since the controller only has around 10,000 for flash and 100,000 for EEPROM.

So if the task is similar to this then I would say that the ATtiny13 good enough.

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