Hello,
NCS1.9.1, nRF5340DK+nRF21540EK, Windows10 X64, VS Code,
not find [nRF21540EK_nRF5340],
about software: how to create project build?
are there any samples?

about hardware: where is TXR connected? what is its function?



thanks
Best Regards
Hi,
Sorry for the delay. I was out of the office for the past week.
1. See GPIO nexus nodes.
2. If you're building a BLE-only application (without 802.15.4) then the child image chosen for the network core is going to be hci_rpmsg, so the SHIELD variable should actually be set for that child image:
west build -b nrf5340dk_nrf5340_cpuapp -- -DSHIELD=nrf21540_ek -Dhci_rpmsg_SHIELD=nrf21540_ek
It doesn't need to have the same contents in hci_rpmsg.overlay again.
-Amanda