integrating the throughput example into the ble_cli example

[ella482]

Is there a way to create a command that gets throughput information from a device in the ble_app_interactive example? I want to get the throughput of a peripheral device once it is connected. 

[Vidar Berg]

Hi,

Do you want to measure throughput for transmit or receive? You may create a new repeated timer instance with the app timer library included in the example and count the number of received/transmitted bytes per time unit. It might be easier than trying to port code from the throughput example.

[ella482]

Vidar,

Thank you for your reply! I am now printing the rssi value of peripheral devices in the device display command in the command-line interface. I would like to print the throughput value next to the rssi value to receive. 

I understand that the devices will probably need to be connected in order to read the throughput, so should I move the rssi print to another spot with the throughput? Can I incorporate the app timer library in with the cli example?

[ella482]

Thanks so much, Vidar! This helps  Where should I go to enable RSSI sampling while connected using the throughput example? I want the RSSI, from one semiconductor to the other, to print out underneath the final throughput value.  

[Vidar Berg]

Glad you found it helpful:) You can call sd_ble_gap_rssi_start() when the connection has been established to enable RSSI sampling, but keep in mind that the RSSI can vary a lot between packets so I think it would make sense to print out an average RSSI value underneath the final throughput number.

[ndc_bee]

Hello Ella;

Could you please tell me how can you measure the throughput and rssi at the same time, I have tried for sereval days to do this but failed,  

I just use the SEGGER open the project as below, this project can do throughput test

then I put the code below (I find them on the Internet) in to the main.c

bu it doesn't work, no rssi data was printed

[Vidar Berg]

Maybe you've done it already but the on_ble_evt() function needs to be registered as an observer like nrf_ble_amtc_on_ble_evt and nrf_ble_amts_on_ble_evt in order for it to receive events from the Softdevice Another alternative is to use the existing BLE event handler in amts.c.

E.g., A simple approach. Print RSSI every time it changes with more than 10dB: 

diff --git a/examples/ble_central_and_peripheral/experimental/ble_app_att_mtu_throughput/amts.c b/examples/ble_central_and_peripheral/experimental/ble_app_att_mtu_throughput/amts.c
index 3810e21..bb3b250 100644
--- a/examples/ble_central_and_peripheral/experimental/ble_app_att_mtu_throughput/amts.c
+++ b/examples/ble_central_and_peripheral/experimental/ble_app_att_mtu_throughput/amts.c
@@ -66,7 +66,12 @@ static void char_notification_send(nrf_ble_amts_t * p_ctx);
  */
 static void on_connect(nrf_ble_amts_t * p_ctx, ble_evt_t const * p_ble_evt)
 {
+    uint32_t err_code;
+
+    err_code = sd_ble_gap_rssi_start(p_ble_evt->evt.gap_evt.conn_handle, 10, 0);
+    APP_ERROR_CHECK(err_code);
     p_ctx->conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
+    
 }
 
 
@@ -145,6 +150,10 @@ void nrf_ble_amts_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context)
             on_tx_complete(p_ctx);
             break;
 
+        case BLE_GAP_EVT_RSSI_CHANGED:
+            NRF_LOG_INFO("RSSI: %d", p_ble_evt->evt.gap_evt.params.rssi_changed.rssi);
+            break;
+
         default:
             break;
     }

[ndc_bee]

Thanks very much, I finally get the RSSI successfully .