b615a89714
The board is retired and the corresponding core (https://github.com/arduino/ArduinoCore-primo) has been archived. Considering that no one is going to maintain the low power code for nRF52/Primo its better to get rid of it alltogether (and no longer advertise compatibility to 'nrf52' which - imho rightfully - seems to confuse a lot of people.
Arduino Low Power library
This library allows the use of the low power features of the SAMD21 MCU. This means your battery powered projects will have a longer battery life on boards like MKRZero, MKR1000 and MKRFox1200.
For more information about this library please visit us at
https://www.arduino.cc/en/Reference/ArduinoLowPower
License
Copyright (c) Arduino LLC. All right reserved.
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA