lower power consumption ant and ble

RE: lower power consumption ant and ble

Matthias — Tue, 20 Jan 2015 11:52:22 GMT

Hi Matthias. If you are transmitting 16 bytes, I would think BLE is the winner in terms of current consumption, simply because it can put that data into one packet while ANT needs to put that into 2 packets. When transmitting 2 packets, the connection event lasts much longer and you need to keep the 16MHz crystal enabled or in standby during the whole connection event which consumes a lot of current. Furthermore, for ANT you need to enable the radio in RX two times because you send two packets, instead of once when using BLE.

RE: lower power consumption ant and ble

Matthias — Tue, 20 Jan 2015 11:51:13 GMT

the shown profile is for ANT acknowledged broadcast with 8 bytes, is that correct? I'm trying to find out if the data transmittion is lower energy with ANT or BLE (i have 16 bytes to transmit) until now, everything speaks for BLE with only 3,5 ms.

RE: lower power consumption ant and ble

Matthias — Fri, 16 Jan 2015 09:28:00 GMT

Thank you a lot! Well, somehow it works with that axis description: If you do it like x/50k you get for 150 the 3 ms, but i wasnt sure i i did it right that way. now i'm sure and can continue working.

RE: lower power consumption ant and ble

Stefan Birnir Sverrisson — Thu, 15 Jan 2015 16:27:50 GMT

Hi Matthias

Thank you for your observation.

The x-axis label and scale in figure 12 of S210 Softdevice Specification v2.0 does not make sense to me either. I know for a fact that from the beginning of (A) until beginning of (D) is 1.5ms. So if we replace the x-axis values in the following way:

50 with 1 ms
100 with 2 ms
150 with 3 ms
...

then it seems to be more or less correct. I have reported this as a documentation error.