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BLE consumption peripheral to high

Hi, i'm using two nrf52840 DK ev kit. One it's the central and one the peripheral

After the connection I need to save power at the peripheral board, because the cpnsumptio it's too high: 1.2mA

How can I reduce this current? I tried to put the NRF in sleep mode by set the power managemet macro in sdk file, but after he lose the connection.

PS: im using the example ble_app_uart

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