Problem is, there's no obvious way to switch an external amplifier or FEM from TX to RX.
You can do it with WiFi using antenna switching
https://docs.espressif.com/projects/esp ... figuration
But this doesn't work with Bluetooth.
I've found 1 reference to a call esp_tx_state_out(???) on github
https://github.com/espressif/esp-idf/issues/2853
and this function exists in libphy.a
But I can't find any documentation on it.
Has anyone managed to graft an RF amp onto an ESP32?
Does anyone know how esp_tx_state_out() works?
It's a bit like fumbling in the dark
Cheers