I am following the SDKv6.20 SimpleLink Academy TI WI-SUN FAN Fundamentals. np_coap_node has no serial output.
At spinel-cli.py I had to comment out lines 292 to 295 to resolve a error.
After starting the wisunstack from spinel-cli the BR green led is on, and RN green led is blinking. RN still no output at Tera Term.