nRF51 beacon scan IOS?

[June1993]

HI all Nordic Developers,

Recently, I am using nRF51 DK as a beacon scanner connected to my laptop (Baudrate: 115200), it works fine to detect the beacon broadcast from my android phone. The result format is set to RSSI, UUID, and Location of Beacon. The result is observed using Termite.

However, when I broadcast beacon with ipad, sometimes the data is not printed nicely(i.e rssi value not shown) in serial monitor.

The following code is in p_ble_evt Bluetooth Stack event:

int Rssi=p_ble_evt->evt.gap_evt.params.adv_report.rssi;
printf("%d", Rssi);
printf(",");
for (int i = x+2; i < p_gap_evt->params.adv_report.dlen; i++){
    printf("%02x ", p_gap_evt->params.adv_report.data[i]);
printf(",");
printf("A1-123\n"); 

What is the possible reason that this issue happens? If yes, any suggestion to fix it?

[Petter Myhre]

What do you mean by not printed nicely? How often is sometimes?

[June1993]

HI, Petter, i added a picture as a reference, it's around 3 out of 10 results displayed, when i use more ipad to broadcast the ibeacon, it becomes worse

[Petter Myhre]

Have you tried to figure out if it is something wrong with the rssi value, or if it something wrong with the "printing"? Are you broadcasting with the same interval on the Android phone as on the iPad?

[June1993]

It should be nothing wrong with the rssi value, i am broadcasting beacon with different interval, because for ios, I just download one app from app store and use that to broadcast.

[Petter Myhre]

Are you using flow control?

What if you only print:

printf("%d", Rssi);
printf("\n");