CC2652R7: How to reduce the power consumption when connecting to an openthread network?

Why are these two initialization functions needed? Do they need to be encrypted and decrypted when connecting to openthread? If they cause excessive power consumption, can we transmit directly without encryption?
When I deleted these two initialization functions, the program crashed, indicating that they are necessary functions?

Is locking the temperature sensor necessary? It consumes most of my battery.

Hi,

Moving forward, we recommend to use the latest delivery for TI OpenThread. See this post for reference: https://e2e.ti.com/support/wireless-connectivity/zigbee-thread-group/zigbee-and-thread/f/zigbee-thread-forum/1368600/certified-thread-v1-3-release-is-now-on-github

For the examples previously in the SDK, hopefully the below helps.

Please see if these posts help:

• https://e2e.ti.com/support/wireless-connectivity/zigbee-thread-group/zigbee-and-thread/f/zigbee-thread-forum/805306/rtos-cc1352r-openthread-lowpower-example
• https://e2e.ti.com/support/wireless-connectivity/zigbee-thread-group/zigbee-and-thread/f/zigbee-thread-forum/888836/ccs-cc2652r-cc2652r-low-power-mode-in-thread-sed
• https://e2e.ti.com/support/wireless-connectivity/zigbee-thread-group/zigbee-and-thread/f/zigbee-thread-forum/880241/ccs-launchxl-cc1352r1-low-power-mode-for-openthread

Regarding AESECB_init and SHA2_init, yes they are required, since Thread Protocol uses various crypto operations.

Regarding OtRtosApi_lock/unlock, yes it is necessary, please refer to: https://dev.ti.com/tirex/content/simplelink_cc13xx_cc26xx_sdk_6_41_00_17/docs/thread/html/thread/application-development.html#openthread-api-mutex

Thanks,
Toby

Thank you for your answer, but I don't know how to use the latest TI OpenThread, and I haven't found any tutorials or sample programs. I can't find the temperature sensor sample program I want in SimpleLink CC13xx CC26xx SDK (7.41.00.17). Can you help me? Thank you

Those examples are no longer supported moving forward, and we recommend using the cli or rcp examples. https://github.com/TexasInstruments/ot-ti/tree/main/examples/apps

You can consider porting to the github if you need a Thread-only application and want to define a custom application layer (as was done in 6.41 SDK).

How to use this github repo (including building) may be found through the documentation, where you can start navigating the docs here: https://github.com/TexasInstruments/ot-ti/blob/main/README.md

Regarding low power, regardless of SDK or github, here are some additional points:

1. Make sure you are measuring the current correctly, i.e. not using EnergyTrace with JTAG connected. See here for more details on EnergyTrace: https://dev.ti.com/tirex/explore/content/simplelink_cc13xx_cc26xx_sdk_7_41_00_17/docs/ble5stack/ble_user_guide/html/energy-trace/energy-trace.html?highlight=energytrace#energytrace-user-guide 
2. Make sure to remove from the Launchpad with JTAG/LED jumpers disconnected, and in code the LED/UART/etc disabled in SysConfig and the application

Hi, Toby
Thanks for your patient answer.
Does this mean that I pull the code from ot-ti on github, write the code in it, build it with the script "./script/build" after writing the code, and then burn the resulting file into the development board? If so, where should I customize the application layer? I looked at the thread-migration-guide, but it doesn't seem to be what I want.

Regarding low power consumption, I made sure that I didn't use EnergyTrace connected to JTAG. The graph I measured is below.

When the current is low, it is in standby mode.

I have removed it from the launch board with the JTAG/LED jumper disconnected, and disabled the LED/UART/etc in SysConfig and the application in the code, but the power consumption when it is connected to openthread is still so high, reaching 7mA.

Thanks,

Gasen

Hi, Toby

This solved my problem. Thank you very much for your patient and detailed guidance.

Thanks,

Gasen