Option for better throughput with BLE multi-link/multi-role

Question

Hello everyone, 
 I’m trying to concurrently transmit data from two separate BLE devices to a smartphone. After reading several posts and other resources, the following are two different configurations that I probably use. I have several questions regarding these configurations before going to implement: 
 
 Each BLE peripheral device has 1 or 2 biosensors and I wanted to send it continuously, say 32 bytes with minimum sampling rate of 250 samples/second. For both configurations, are they able to send that amount of data with that data rate to smartphone’s app without any data loss? 
 I saw an example of Configuration 1 demonstrated at Nordic youtube video and it has a sample code using phone app to turn on/off LED from the peripheral devices. However, I’m not sure if it has high throughput or not. Between the two configurations, which one is easier to implement? 
 Looking at the config #2, seems it will be more on the phone app to be able to connect, and then collect data from two BLE peripheral devices. Any suggestions/ comments if it’s more doable and flexible to work?

Hung Bui · Accepted Answer

Hi Tai, 
 We won't be able to step to your code and debug every issue. My suggestion is to look at the example that already available. For a device that act as both peripheral and central please look at : \ble_central_and_peripheral\experimental\ble_app_hrs_rscs_relay 
 When you see an error please look for the function that throwing the error and the error_code. Then you can look at the function description to see what could be the reason for the error. For example if the function is sd_ble_gatts_hvx(), and the error is NRF_ERROR_BUSY you can read the reason for it in the description:

Option for better throughput with BLE multi-link/multi-role

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