throughput

[Ridhi]

i have nrf52832 and softdevice s132. i want to calculate throughput. i tried running ble_att_mtu_thorughput example and read https://www.novelbits.io/bluetooth-5-speed-maximum-throughput/

but i am not getting what is the ATT_MTU and other things.

like if i have 29 bytes of temperature humidity data 

23.17 44.90-01/01/70-00:00:19

i took 10 readings like this

i have set connection interval as 100-100ms 

how to get throughput with ble 4.2 and ble 5

[Kenneth]

The novelbits.io article you refer to is very good. You can also find some theoretical throughput numbers here for various configurations:
https://infocenter.nordicsemi.com/topic/sds_s132/SDS/s1xx/ble_data_throughput/ble_data_throughput.html 

One thing you should be aware is that in most cases the link will be established with some default parameters, and then the central and peripheral need to exchance various feature exchanges (e.g. attt mtu, dle, rf phy, connection parameters) that will enable the higher throughput numbers. So you will not get high throughput before this have occured. If you open an BLE example project you can find this is typically configured/handled in gatt_init() and conn_params_init().

Kenneth

[Ridhi]

can you pls tell how much will be my throughput if:

like if i have 29 bytes of temperature humidity data 

23.17 44.90-01/01/70-00:00:19

i took 10 readings like this

i have set connection interval as 100-100ms 

how to get throughput with ble 4.2 and ble 5

[Ridhi]

gentle reminder

[Kenneth]

Sorry, but you have the information you need in the provided link and description. You need to study the BLE examples in the nRF5 SDK.

If you send 29bytes every 100ms then the throughput is: 29bytes / 100ms = 290bytes/second.

Best regards,
Kenneth

[Ridhi]

but in novel bits its stating that multiple packets per connection interval and then they calculate the throughput. kindly tell how to use it in my case to find throughput