RE: Easiest way for two nRF52x devices to ping each other?

embo san — Mon, 20 Mar 2017 07:59:48 GMT

I think it already is

RE: Easiest way for two nRF52x devices to ping each other?

Adrian Eggenberger — Mon, 20 Mar 2017 07:57:19 GMT

I was looking for long range example code and found this answer. Great! When will the softdevice support the long range advertising?

RE: Easiest way for two nRF52x devices to ping each other?

embo san — Wed, 15 Feb 2017 13:51:32 GMT

thank you!

RE: Easiest way for two nRF52x devices to ping each other?

Ole Bauck — Wed, 15 Feb 2017 13:42:00 GMT

If you just want two nRF52840 kits to talk to each other you can use any combination of central and peripheral in the SDK.

If you want bluetooth long range you need to be in a connection and set the PHYsical layer data rate. The SoftDevice does not support long range advertising at the moment. One example that shows how to set the PHY data rate is the ATT MTU throughput example, but you can easily modify any examples to change to long range mode during a connection. What you have to do is first set the preferred PHY at startup to include long range mode (called CODED_PHY), for example:

ble_opt_t opts;
memset(&opts, 0x00, sizeof(ble_opt_t));

opts.gap_opt.preferred_phys.tx_phys = BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED;
opts.gap_opt.preferred_phys.rx_phys = BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED;

ret_code_t err_code = sd_ble_opt_set(BLE_GAP_OPT_PREFERRED_PHYS_SET, &opts);
APP_ERROR_CHECK(err_code);

Then when you connect (for example in on_ble_gap_evt_connected(..) function) you have to call sd_ble_gap_phy_request(..) from either the peripheral or the central to actually set the PHY data rate:

ble_gap_phys_t phys =
{
    .tx_phys = BLE_GAP_PHY_CODED,
    .rx_phys = BLE_GAP_PHY_CODED,
};

err_code = sd_ble_gap_phy_request(p_gap_evt->conn_handle, &phys);
APP_ERROR_CHECK(err_code);

You should also check that you get the BLE_GAP_EVT_PHY_UPDATE event in on_ble_evt(..) and check that the PHY data rate was set correctly.

RE: Easiest way for two nRF52x devices to ping each other?

awneil — Wed, 15 Feb 2017 13:26:21 GMT

What do you mean by, "ping" in this context?