https://devzone.nordicsemi.com/f/nordic-q-a/49346/usually-we-use-a-phone-to-upgrade-the-nrf52840-devices-can-i-upgrade-the-device-by-two-sets-of-nrf52840I have two nrf52840 devices and conneted them each other. one is slave mode and other is master mode. can i upgrade the slave device by the master?en-USTelligent Community 13Thu, 04 Jul 2019 06:08:28 GMThttps://devzone.nordicsemi.com/thread/196380?ContentTypeID=1Thu, 04 Jul 2019 06:08:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:66c093b4-6bae-43ab-96dc-39d513d16e09HPD<p>What do you mean by Upgrade ? Do you want to change the slave device to master or anything else ?&nbsp;&nbsp;</p><div style="clear:both;"></div>