Posted on November 15, 2017 at 15:54ok now i got the firmware and download the binary to the sp1ml using st-link , looks it is downloaded , now i want to test the AT COMMAND mode using the hyperterminal , first let me tell you the hardware connections pins :
-SHDN connected to 3,3v , always power up
-mode0 to 0, it is command mode
-vdd 3,3v
-gnd to gnd
-rx of spirit to tx of hyperterminal
-tx of spirit to rx of hyperterminal
-reset to button 3,3v to 0volts
i use baudrate 9600 and CR after sending :
, i opened hyperterminal after reset i got '?', so i entererd to command mode '+++' no answer , i tried AT nthg comes from spirit,??? is there something i missed
