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CC3220SF-LAUNCHXL: i cant't control red LED(D7) for TI app(simplelink Wi-Fi Starter Pro)

Part Number: CC3220SF-LAUNCHXL

I follow the OOB guide

when i follow in step 6.2.1 (local Network Demo,page 15),i can't control red LED(D7)

i have some question

1.What is the CLI?

2.why can't i control the red LED?

thanks