8. Measurement Results

This chapter lists indicative results as observed while measuring the peripheral device for the use cases described in chapter 2.

All samples were collected one minute after powering up the device to allow ample time for the CMAC to utilize its power saving procedures to their fullest. The sample duration was one minute as well.

The Charge columns represent the charge spent throughout the entire sampling process. In a similar fashion, AVG Cur columns correspond to the average current and represent both the average current of sleep times and the times that the system is awake.

For measurements that involve BLE events of any kind, the measurements are slightly lower than the actual power consumption due to limitation of the power analyzer. It is not possible to capture accurately currents under 10 μA in a measurement that also contains currents over 100 μA.

8.1. Advertising

8.1.1. 27 Bytes NON_CONN

Table 1 Advertising 27 Bytes Non Connectable

ADV Interval	XTAL32K Avg Cur	XTAL32K Charge	RCX Avg Cur	RCX Charge
400ms	28.312 μΑ	1.698 mC	29.406 μΑ	1.763 mC
1000ms	17.532 μΑ	1.051 mC	17.937 μΑ	1.076 mC
1500ms	15.094 μΑ	0.905 mC	15.265 μΑ	0.915 mC

8.1.2. 27 Bytes UNDIRECTED

Table 2 Advertising 27 Bytes Undirected

ADV Interval	XTAL32K Avg Cur	XTAL32K Charge	RCX Avg Cur	RCX Charge
400ms	33.920 μΑ	2.035 mC	34.549 μΑ	2.072 mC
1000ms	20.041 μΑ	1.202 mC	20.037 μΑ	1.202 mC
1500ms	16.929 μΑ	1.015 mC	16.674 μΑ	1.000 mC

8.2. Connected (Peripheral Side)

For this section, only the peripheral was measured as it is the most common role for a developed device.

8.2.1. Keep Alive Packets

Table 3 Connected - Keep Alive Packets

CONN Interval	XTAL32K Avg Cur	XTAL32K Charge	RCX Avg Cur	RCX Charge
30ms	107.181 μΑ	6.430 mC	125.499 μΑ	7.529 mC
400ms	19.020 μΑ	1.141 mC	22.138 μΑ	1.328 mC
2000ms	12.480 μΑ	0.748 mC	14.928 μΑ	0.895 mC
4000ms	11.673 μΑ	0.700 mC	14.038 μΑ	0.842 mC

8.2.2. Read 20 Bytes

Table 4 Read 20 Bytes long characteristic - Approximately One Event per two Connection Intervals due to Acknowledge requirement.

CONN Interval	XTAL32K Avg Cur	XTAL32K Charge	RCX Avg Cur	RCX Charge
30ms	335.937 μΑ	20.156 mC	365.034 μΑ	21.902 mC
400ms	35.956 μΑ	2.157 mC	40.342 μΑ	2.420 mC
2000ms	15.922 μΑ	0.955 mC	18.471 μΑ	1.108 mC
4000ms	13.338 μΑ	0.800 mC	15.472 μΑ	0.928 mC

8.2.3. Write 20 Bytes

Table 5 Write 20 Bytes long characteristic - Approximately One Event per two Connection Intervals due to Acknowledge requirement.

CONN Interval	XTAL32K Avg Cur	XTAL32K Charge	RCX Avg Cur	RCX Charge
30ms	312.267 μΑ	18.736 mC	356.261 μΑ	21.375 mC
400ms	34.142 μΑ	2.048 mC	39.263 μΑ	2.355 mC
2000ms	15.620 μΑ	0.937 mC	18.377 μΑ	1.100 mC
4000ms	13.199 μΑ	0.791 mC	15.802 μΑ	0.948 mC

8.2.4. Write No Response 20 Bytes No Notifications Enabled

Table 6 Write no Response 20 Bytes long characteristic - Approximately one Event per Connection Interval

CONN Interval	XTAL32K Avg Cur	XTAL32K Charge	RCX Avg Cur	RCX Charge
30ms	359.844 μΑ	21.590 mC	401.550 μΑ	24.092 mC
400ms	38.255 μΑ	2.295 mC	43.454 μΑ	2.607 mC
2000ms	16.482 μΑ	0.988 mC	18.980 μΑ	1.138 mC
4000ms	13.722 μΑ	0.823 mC	15.901 μΑ	0.954 mC

8.3. MTU Comparisons

8.3.1. Read 509 Bytes Characteristic MTU 65 (default)

Table 7 Read 509 Bytes Characteristic MTU 65 (default)

CONN Interval	XTAL32K Avg Cur	XTAL32K Charge	RCX Avg Cur	RCX Charge
30ms	275.177 μΑ	16.510 mC	302.645 μΑ	18.158 mC
400ms	31.259 μΑ	1.875 mC	35.004 μΑ	2.100 mC
2000ms	14.994 μΑ	0.899 mC	17.169 μΑ	1.030 mC
4000ms	12.831 μΑ	0.769 mC	15.165 μΑ	0.909 mC

8.3.2. Read 509 Bytes Characteristic MTU 512

Table 8 Read 509 Bytes Characteristic MTU 512

CONN Interval	XTAL32K Avg Cur	XTAL32K Charge	RCX Avg Cur	RCX Charge
30ms	763.881 μΑ	45.832 mC	798.049 μΑ	47.882 mC
400ms	67.671 μΑ	4.060 mC	71.372 μΑ	4.282 mC
2000ms	22.406 μΑ	1.344 mC	24.762 μΑ	1.485 mC
4000ms	16.759 μΑ	1.005 mC	18.824 μΑ	1.129 mC

8.4. Value Automatic Change and Notify

8.4.1. Auto-change every 2000 ms

Table 9 Auto-change value and Notify peers

CONN Interval	XTAL32K Avg Cur	XTAL32K Charge	RCX Avg Cur	RCX Charge
30ms	114.336 μΑ	3.429 mC	131.706 μΑ	7.902 mC
400ms	25.065 μΑ	1.503 mC	28.258 μΑ	1.695 mC
2000ms	18.540 μΑ	1.112 mC	20.961 μΑ	1.257 mC
4000ms	18.255 μΑ	1.095 mC	20.129 μΑ	1.207 mC

8.5. Sleep Modes

8.5.1. Extended Sleep

Table 10 Extended Sleep

XTAL32K Avg Cur	XTAL32K Charge	RCX Avg Cur	RCX Charge
9.786 μΑ	0.587 mC	10.066 μΑ	0.603 mC

8.5.2. Deep Sleep

Table 11 Deep-Sleep. Cannot be measured for RCX.

XTAL32K Avg Cur	XTAL32K Charge
3.496 μΑ	0.209 mC

8.5.3. Hibernation

Table 12 Hibernation

XTAL32K Avg Cur	XTAL32K Charge
3.328 μΑ	0.199 mC