nrf52832 ble_app_uart current consumption

[ytpark]

I am using nRF5_SDK_12.2.0, S132-SD-v3, nrf52832 pca10040 board, ble_app_uart When measuring current consumption using ble_app_uart -> 0.6~0.8mA(advertising) I want to reduce current consumption more than now. Please show me how.

ps : source -> uart_init(), printf(), buttons_leds_init() delete

[Nguyen Hoan Hoang]

It is the uart that consume that much current. Disable it while it is not connected will drop the current down to around 20 uA depending on the ADV_INTERVAL. Enable the UART will bring it up to around 0.6-0.8 mA.

[ytpark]

When this happens, the current consumption is 0.6 ~ 0.8mA. Why is this happening?