OpenThread just FTD

RE: OpenThread just FTD

Charlie — Wed, 26 May 2021 13:51:06 GMT

Hi orkunsengur,

This is an interesting question. I did some research online and found a discussion in openthread-users group related to your question: Force node to be router?

My understanding is that the Thread network is self-organized, and the FTD device has full OT tack in firmware, it is will be Router or REED in default.

Your concern might be how the FTD plays as FED. I am afraid this is no FED anymore. The discussion mentions an old API otThreadSetRouterRoleEnabled() that can disable the Router role, but this function does not appear on the recent API releases.

Best regards,

Charlie

RE: OpenThread just FTD

orkunsengur — Wed, 26 May 2021 11:28:38 GMT

Thanks Charlie.

I want to ask one more question. There three types of FTD; router, REED, FED. My all devices should be Router or REED. How can I do that?

RE: OpenThread just FTD

Charlie — Tue, 25 May 2021 16:23:19 GMT

Hi orkunsengur,

It is possible to send multicast messages to MTD devices, but they do not forwards all messages to their parents, so MTD devices can only be used as End Device. MTD normally used as a CoAP client in application.

As long as your build the CoAP client project with "west build -b nrf52840dk_nrf52840", it will only work as an FTD device by default. The codes you mentioned are used to enable switch MED/SED modes when you build the program as MTD with "west build -b nrf52840dk_nrf52840 -- -DOVERLAY_CONFIG='overlay-mtd.conf'", so they are not be used when you build an FTD firmware.

Best regards,

Charlie