5.2 Measurements for Green Power Device

In Operation1, the GPD in a standby state. This can be carried out below the 1 μA threshold with full 80KB RAM retention. The GPD device is meant as a battery-less device, only being powered on with enough energy to send out a Zigbee command from harvesting energy from for example flipping a switch. Otherwise, the GPD is in sleep mode, or powered off. Figure 12 shows the average current consumption when the GPD is in sleep mode, which was averaged at 1 μA.

Figure 12. GPD Current Consumption Measurement in Sleep Mode

In Operation2, the GPD sends a set number of GPDFs, configured by the predefine symbol GPDF_FRAME_DUPLICATES, which is defined at compile time. The default is set to send 3 duplicate GPDFs, or 4 packets in total. Figure 13 shows the current consumption when the GPD sent 4 total GPDF packets at 5 dBm, which was averaged at 6.1 mA and took 16 ms. The current consumption when the GPD is sending 1 GPDF with no duplicates at 5 dBm, was averaged at 5.6 mA and took 4.5 ms.

Figure 13. GPD Current Consumption Measurement for Sending GPDF With 3 Duplicates (5 dBm)