[Q]: How to use .write asynchronously

[lbirkert]

I've got some operations that are quite fragile to timing [multi-threading is not possible] and using network.write in between causes these operations to fail. I only want to write for sending agnostic data back to my master node, so it receiving this data is non-critical. Can I somehow write asynchronously? - I've noticed that the RF24 has a startWrite method, could I somehow use this without having to sacrifice the additional benefits [reliable data transfers] that RF24Network gives me?

[2bndy5]

RF24Network uses RF24::writeFast() and RF24::txStandby() under the hood.

RF24Network/RF24Network.cpp

Lines 995 to 1000 in 4e804ee

	ok = radio.writeFast(frame_buffer, frame_size, 0);
	if (!(networkFlags & FLAG_FAST_FRAG)) {
	ok = radio.txStandBy(txTimeout);
	radio.setAutoAck(0, 0);
	}

There is no way to write asynchronously from RF24Network/Mesh. Normally, I'd suggest inheriting from RF24Network and overwriting some behavior, but it wouldn't be that easy because

1. messages over 24 bytes long are fragmented into a series of 24 byte payloads with changing RF24NetworkHeader info.
2. Receiving payloads (during network.update()) isn't designed for using interrupts.

I think your best approach is to separate out some of the logic in your app to different processors. The RP2040 seems well suited for this because it is a dual-core processor.