朋友的朋友，细节如下。

I may have a requirement to develop a Sub-GHz Wireless Sensor proprietary Mesh stack for a German Chip Manufacture.

TI has implemented this Sub-GHz mesh, we need do something like this http://www.ti.com/lit/ug/tidu546a/tidu546a.pdf

MESH has to have Collision avoidance protocols-robust against jamming and noise using frequency hopping.

Driver would be available for the RF, but the Network stack sub-Ghz Mesh network has to implemented or partially working to a point where it works.

It is expected to start Mid of Feb. There will be no detailed requirement. The Vendor is a chip manufacturer like TI, they wish to develop the Sub-Ghz-Mesh software stack for their Sub-Ghz RF chip.

Some research to get some reference implementation, arm-mbed has a reference MESH over 6LowPAN,
https://www.mbed.com/en/platform/mbed-os/

May use FreeRTOS/AWS FreeRTOS.

No travel needed for now.

The resource would get subcontracted to our company, there will standard terms.