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Please use the GPIO function to control the LED.
The eval board uses P14 for LED.
1. Don't set up P14 in your BLE_PROFILE_GPIO_CFG structure.
2. Drive P14 low when you want to turn it on.
// all other application initialization
// Drive P14 low. If the LED is hooked up right, it will turn on
gpio_configurePin(14/16, 14%16, GPIO_OUTPUT_ENABLE, 0);
Thanks for the help! This worked for me.