well if your getting it into programming mode an you get that error, normaly the txd an rxd lines need swapping around..
otherwise you have to have the unit powered off.. press button an keep pressed while powering up the unit. - that puts it in programming mode.
(I put switchs on my boards to make it easyer for me to program them.)
otherwise you have to have the unit powered off.. press button an keep pressed while powering up the unit. - that puts it in programming mode.
(I put switchs on my boards to make it easyer for me to program them.)