choose avr sleep mode with sleepNode

[acejoh]

Hi,

I'd like to put the atmega of my rf24 node to sleep, but I need PWM so I can't use the full sleep mode. I need the idle mode instead. I don't see any possibility for this in RF24Network? Maybe it is possible to disable ENABLE_SLEEP_MODE in rf24network_config and use another library for sleeping? I haven't tried that and it would be a solution, but it'd be nice if it was available in rf24network.

[acejoh]

I would propose to add another RF24Network::sleepNode function with an additional parameter:

bool RF24Network::sleepNode( unsigned int cycles, int interruptPin, uint8_t mode ){


  sleep_cycles_remaining = cycles;
  set_sleep_mode(mode); // sleep mode is set here
  sleep_enable();
  ...
}

the original sleepNode method would then be modified like so.

bool RF24Network::sleepNode( unsigned int cycles, int interruptPin ){
  sleepNode(cycles, interruptPin, SLEEP_MODE_PWR_DOWN);
}

What do you think?