https://devzone.nordicsemi.com/f/nordic-q-a/25848/assinging-ram-variable-to-attribute-char-valueHi, i have assigned RAM address as: #define RAM_MEMORY_TEST_ADDRESS (0x20002BD8) uint8_t * p_ram_test = (uint8_t *)RAM_MEMORY_TEST_ADDRESS; to this p_ram_test i am assigning : p_ram_test = packet_form;// where packet form is also array ofen-USTelligent Community 13Thu, 12 Oct 2017 08:41:48 GMThttps://devzone.nordicsemi.com/thread/101815?ContentTypeID=1Thu, 12 Oct 2017 08:41:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5e95704d-8751-45b2-bd08-c48ac7a6194eHung Bui<p>I don&#39;t see the point assigning p_ram_test to RAM_MEMORY_TEST_ADDRESS and then assign it again to p_ram_test = packet_form. It will point to same address of packet_form.</p> <p>To include a variable into different file, you need to declare it and add extern in.</p> <p>So what you need to do is to declare in our_service.c extern uint8_t * p_ram_test;</p> <p>And then use p_ram_test normally (without extern)</p><div style="clear:both;"></div>