Reddit reviews TinySine USBtinyISP V2 AVR ISP Programmer for Arduino
We found 2 Reddit comments about TinySine USBtinyISP V2 AVR ISP Programmer for Arduino. Here are the top ones, ranked by their Reddit score.
USBtinyISPArduino programmerbootloader
you could always just buy a USBtinyISP and program the chip directly bypassing the bootloader. That would be a sure way to figure it out.
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Here's something that you should check, did you correctly install the drivers for the printrboard when it's in bootloader mode? As far as I remember they don't install by default, you have to point the device at the Atmel FLIP folder in program files to install the drivers for DFU mode.
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https://www.amazon.com/TinySine-USBtinyISP-AVR-Programmer-Arduino/dp/B00N8EVQ30/ref=sr_1_7?s=electronics&ie=UTF8&qid=1549155323&sr=1-7&keywords=usbasp
So then you'll have to get an AVR programmer, or buy their FTDI cable.