Other Parts Discussed in Thread: TIDC-01005
Hello,
We have developed our Custom cc3220sf board for our WIFI based IOT application.Our Application is based on TI wifi door lock firmware ( TIDC-01005 ).
I have put the CC3220sf in LPDS mode .We are using MQTT as our main feature.Even after CC3220sf in LPDS our board is consuming around 4mA.
We are also using UART interface in our application but i am disabling it when in LPDS mode.
To confirm that its entering the LPDS mode in my application ,In LPDS only selected GPIO works and in my application GPIO13 works in LPDS which i have used as switch,when i press the switch it comes out of LPDS and using other part of my application i am making it to go LPDS again.so it confirms that its entering the LPDS mode.
But when i test in cc3220sf launchpad powering only cc3220sf and the on board serial flash its showing the current consumption lesser and around 1mA.
I don't understand which part is consuming the power?According to the TIDC-01005 Battery-Powered, Smart-Lock Reference Design With Cloud Connectivity Using SimpleLink™ Wi-Fi® document it should be around 350uA.
Any suggestions?we have built the hardware on CC3220sf launchpad schematics.
Anything to do with LSI(Long sleep Interval) which mentions as below
Long Sleep Interval (LSI) – When an 802.11 station is connected to the access point, it must receive the beacons transmitted by the AP. APs typically transmit a beacon every 102.4 ms. 802.11 standards define the DTIM (Delivery Traffic Indication Map) as a specific beacon that contains information regarding incoming packets for the STA. The AP may choose its DTIM interval (such as 1-every beacon, 2-every other beacon, and so forth). This special low-power policy instructs the networking subsystem to skip beacons and DTIM packets, and comes with a desired max sleep time parameter. The parameter reflects the desired sleep interval between two consecutive wakeups for beacon reception. The Wi-Fi module computes the desired time and wakes up to the next DTIM that does not exceed the specified time (see Table 3 for examples). The desired maximum sleep time parameter is 2 seconds. TI strongly recommends setting the LSI parameter to less than half a second to ensure reliable service while lowering current consumption.
Does increasing LSI will reduce power consumption?
Regards
Sanath Rai.
