# Problems uploading to ATtiny84a over serial | ATTinyCore

**URL:** <https://forum.arduino.cc/t/problems-uploading-to-attiny84a-over-serial-attinycore/1367027>\
**Category:** 3rd Party Boards\
**Created:** [March 25, 2025, 12:47am UTC](https://forum.arduino.cc/t/problems-uploading-to-attiny84a-over-serial-attinycore/1367027 "2025-03-25T00:47:59Z")\
**Posts on this page:** 1\
**Showing post:** 19

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**Author:** ![van\_der\_decken](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/van_der_decken/32/1006976_2.png) [@van\_der\_decken](https://forum.arduino.cc/u/van_der_decken)\
**Post date:** [March 25, 2025, 10:09pm UTC](https://forum.arduino.cc/t/problems-uploading-to-attiny84a-over-serial-attinycore/1367027/19 "2025-03-25T22:09:29Z")

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If you're going to the ATtiny1616 or anything else in that series, look at UPDI programming. No bootloader required, and you can even program it with the same FTDI232 interface that you'll use for serial.

 ![image](https://europe1.discourse-cdn.com/arduino/original/4X/b/d/8/bd8aa0e411f988be5dfaf56b15265fd866224661.png)

Check out the [Yet another UPDI programmer Mk II](https://forum.arduino.cc/t/yet-another-updi-programmer-mk-ii/1357056) topic for even more parts frugal solutions.

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