deskthority

Hi, I'm assembling some PCBs that use an ATMega32U4 chip. One didn't work because I soldered it wrong and made a short to ground. The other one doesn't work, at first I thought I soldered that one wrong somehow too, because nothing shows up in Device Manager or Freematics Arduino Builder like it does with Pro Microes. But, I've been hearing that some kind of bootloader needs to be installed. Do I need to somehow install a bootloader on the lose chip in order to flash firmware or did I just botch the soldering again?

Yes you need to flash the bootloader onto the atmega32u4 with an ISP. See this article https://electronut.in/bootloader-atmega32u4/

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rickard.von.essen wrote: Yes you need to flash the bootloader onto the atmega32u4 with an ISP. See this article https://electronut.in/bootloader-atmega32u4/

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Thanks

UPDATE: I installed the FLIP drivers and it programmed over USB right away. Oh well, I only spent $5 on a Chinese ISP.