@Yveaux size, mostly. And the fact that I have them

Is anybody working on ATTiny85 support for MySensors? I found some old thread about this, but it seems that it was quite old and somewhat abandoned. Would this even be feasible anymore?

Oh yeah... Read the docs.. Yes, I probably should do that too Thanks!

Okay, that seems to explain this. I changed the sleeping time to 20 seconds and sure enough, after about 10 seconds the current draw dropped down to ~7uA. So looks like I'm good now.

So what did I learn from this? Well... I better start reading the source code for MySensors Either that, or write my own lib so I know what is going on

Thanks for the help!

I'm starting a new thread about this as previously I hijacked someone else's old thread.

I'm currently playing around with MySensors and the first sensor I'm trying to build using it is a door sensor. It's battery powered and it's working just fine (using about 6uA while sleeping, so batteries should last a good while). But when I don't have my Gateway (a Raspberry Pi Zero W with MQTT Gateway) online, the power consumption seems to stay pretty high (3mA or so). So it seems that the sensor is not sleeping properly, but instead tries to reconnect to the Gateway all the time?

This is my sketch:

// Enable debug prints to serial monitor
//#define MY_DEBUG

// Set how long to wait for transport ready in milliseconds
#define MY_TRANSPORT_WAIT_READY_MS 3000

// Enable and select radio type attached
#define MY_RADIO_NRF24

// Set this nodes id. Needs to be unique between nodes (value = 1-254)
#define MY_NODE_ID 102

#include <SPI.h>
#include <MySensors.h>

#define CHILD_ID   3
#define DOOR_PIN   3     // Arduino Digital I/O pin for button/reed switch
#define SLEEP_TIME 3000 // Sleep time between heartbeats (seconds * 1000 ms)

int oldValue = -1;

MyMessage msg(CHILD_ID, V_TRIPPED);

void setup() {
  pinMode(DOOR_PIN, INPUT);
}

void presentation() {
  present(CHILD_ID, S_DOOR);
}

void loop() {
  int value = digitalRead(DOOR_PIN);

  if (value != oldValue) {
     send(msg.set(value == HIGH ? 1 : 0));
     oldValue = value;
  }

  wait(10);

  Serial.println("Going to sleep now...");
  smartSleep(digitalPinToInterrupt(DOOR_PIN), CHANGE, SLEEP_TIME);
}

I tried enabling debug and this is what I get in the loop:

30812 MCO:SLP:MS=0,SMS=0,I1=0,M1=1,I2=1,M2=1
30818 !MCO:SLP:TNR
Going to sleep now...

And yes, I know it's not very efficient to only sleep for 3 seconds, that's there only for testing this thing out.

Yes, you're right. Considering how I kind of hijacked this thread anyway I will run some more tests and start a new thread if I can't find a solution

Oh, that's very simple. It's there because I'm testing this and trying to make it work. It will be more like 15 minutes to half an hour in reality.
Unfortunately still haven't been able to get this to work, and as I'm just starting with my home automation stuff, the gateway will probably be offline quite a lot while I'm developing things. And that means that the battery powered sensors are going to suck their batteries dry in no time... I probably have to add an on/off switch to the sensors or something. Just so I can turn them off when I know they can't be used.

The sketch is very very simple. Just a basic door sensor.

// Enable debug prints to serial monitor
//#define MY_DEBUG

// Set how long to wait for transport ready in milliseconds
#define MY_TRANSPORT_WAIT_READY_MS 3000

// Enable and select radio type attached
#define MY_RADIO_NRF24

// Set this nodes id. Needs to be unique between nodes (value = 1-254)
#define MY_NODE_ID 102

#include <SPI.h>
#include <MySensors.h>

#define CHILD_ID   3
#define DOOR_PIN   3     // Arduino Digital I/O pin for button/reed switch
#define SLEEP_TIME 3000 // Sleep time between heartbeats (seconds * 1000 ms)

int oldValue = -1;

MyMessage msg(CHILD_ID, V_TRIPPED);

void setup() {
  pinMode(DOOR_PIN, INPUT);
}

void presentation() {
  present(CHILD_ID, S_DOOR);
}

void loop() {
  int value = digitalRead(DOOR_PIN);

  if (value != oldValue) {
     send(msg.set(value == HIGH ? 1 : 0));
     oldValue = value;
  }

  wait(10);

  smartSleep(digitalPinToInterrupt(DOOR_PIN), CHANGE, SLEEP_TIME);
}

I tried changing smartSleep to sleep to try if that makes a difference, but it doesn't seem to change anything.

Hmm.. Looks like it's still using quite a lot of power. When the gateway is running and the sensor is sleeping I'm seeing about 6uA of current drawn. When gateway is down, it's about 3mA. So that's not very good.. I need to add some debug statements to see if it actually is sleeping or what.

Ah, cool. I will try to change the value and see how that affects the power consumption. Thanks!