GeeWin Nano V3.0 CH340G Module ATmega328 Board Micro Controller Driver with USB Cable + Nano Screw Terminal Adapter Shield Expansion Board for Arduino Nano V3.0 (Soldered Board)

Updated- seller quickly responded and replaced defective board. I will be ordering more from this seller shortly. Great product at a great price backed by a great seller!It took upload fine for first sketch but must set to use old boot loader. It will not allow me to upload any sketch now. Its equivalent to a brick on my desk. I'm awaiting a response from the seller and will update. At this point I can not recommend.

Easy to install, no driver needed

Unable to upload a sketch. Green light on and flashing red. I get a avrdude:jtagmkII_recv_frame( ):timeout_getsync( ):sign-on command:status -1I have tried all the internet suggestions iI can find.I am using a Macbook Air macOS 10.15 Catalina

had issue with uploading when first got it, was able to get it to work and now getting same error with upload on Mac