NRF52DK_main

int esb_initialize(void)
{
    int err;
    /* These are arbitrary default addresses. In end user products
     * different addresses should be used for each set of devices.
     */
    uint8_t base_addr_0[4] = {0xe1, 0xe1};
    uint8_t base_addr_1[4] = {0xC2, 0xC2, 0xC2, 0xC2};
    uint8_t addr_prefix[8] = {0xe1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8};
    esb_set_rf_channel(100);




    struct esb_config config = ESB_DEFAULT_CONFIG;

    config.protocol = ESB_PROTOCOL_ESB_DPL;
    config.bitrate = ESB_BITRATE_2MBPS;
    config.mode = ESB_MODE_PRX;
    config.event_handler = event_handler;
    config.selective_auto_ack = true;

    err = esb_init(&config);
    if (err) {
        return err;
    }

    err = esb_set_base_address_0(base_addr_0);
    if (err) {
        return err;
    }

    err = esb_set_base_address_1(base_addr_1);
    if (err) {
        return err;
    }

    err = esb_set_prefixes(addr_prefix, ARRAY_SIZE(addr_prefix));
    if (err) {
        return err;
    }

    err = esb_set_rf_channel(100);
    if (err) {
        return err;
    }

    return 0;
}