https://devzone.nordicsemi.com/f/nordic-q-a/28213/how-will-we-change-the-minimum-and-maximum-connection-interval-in-ble-advertising-code-once-the-device-gets-connected-with-the-central-devicehi, I am working on nrf51822 chip and using sdk11.0.0 sdk,softdevice (s130 2.0.1) .I want to send 4Kb of data in a packet from the central device and on the other side my peripheral device will receive the data in a packet of 20 bytes. When I am settingen-USTelligent Community 13Tue, 12 Dec 2017 13:10:35 GMThttps://devzone.nordicsemi.com/thread/111438?ContentTypeID=1Tue, 12 Dec 2017 13:10:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:03ed9875-3e5f-4d68-8bba-3150fa42cb36MartinBL<p>Hi,</p> <p>With the S130, you will typically send about 6 packets with 20 bytes of payload in each packet on every connection event. Naturally, if you have connection events every 1000ms the transfer will be much slower than if you have connection events every 7.5ms. However, the nRF51&#39;s radio consumes the exact same energy transferring 4KB regardless of how fast you are doing it. If you transmit 6 packets every second the radio will spend a few ms transferring data and then your CPU will sleep the rest of the second. If you transfer packets every 7.5ms the radio will be on almost continuously, but the entire transfer will take a lot less time. So the <em>average</em> current consumption (which is what you should care about) is the same.</p><div style="clear:both;"></div>