Hi to all,
First time posting here, I need an advice on the possibility to build a daisy chain with 2 or more SPI slave devices.
The master will be the Arduino Nano, with an RF24L01+ and a ISD 1790 connected to it.
I need a daisy chain to connect them because I haven't more pins available to do a separate slave select for each device.
There is any possibility to realize a daisy chain without having the control over the devices' software?
Other solution is using an Arduino Mega and a separate slave select line for each device.
You can daisy-chain SPI devices under certain conditions like they are all the same and/or simple devices like shift registers and/or smart devices that can handle the data stream.
I'm not familiar with the devices you are using but I doubt it would be possible to connect them like that as they would have different requirements for the data written. Do they even have data outputs?
If you can spare a single extra pin you can use external logic to select between any number of devices by using a shift reg to provide the CS signals.
