This is usually supplied by the manufacturer, and I do not have one of these boards, but here are some notes from that URL…. Ask Question. Search forums. I was up until 4am trying various solutions and suggestions I read about in other threads and boards to no avail, until I noticed that steps for flashing the firmware involved shortening two pins on the board. The RX pin is only needed when you want to send text to the micro controller as well.
nest...