Multiple Relays Spanned Across Nodes

[tbully]

Hello All -
I ran in to an interesting issue over the weekend that I'm hoping I can get some help with.

I have two identical nodes/sensors. Each Arduino has a water pulse meter and a relay (to control an actuator/valve).

I used the same forloop logic found in the relay example at: http://www.mysensors.org/build/relay

However, the relay was not discovered/added by Vera on the second node. The only way I could get it to include was if I started the forloop with sensor=2. This will give the first relay on the second node an ID of "2". This seemed like an odd necessity to me as it was coming from a different sensor/node.

Is this expected behavior?

for (int sensor=2, pin=RELAY_1; sensor<=NUMBER_OF_RELAYS;sensor++, pin++) {
// Register all sensors to gw (they will be created as child devices)
gw.present(sensor, S_LIGHT);
// Then set relay pins in output mode
pinMode(pin, OUTPUT);
// Set relay to last known state (using eeprom storage)
digitalWrite(pin, gw.loadState(sensor)?RELAY_ON:RELAY_OFF);
}

All is well and both nodes are up and functioning. It just seemed like an ugly way to handle this situation and could cause trouble down the road as I add relays/sensors.

[tbully]

Any thoughts? It's working OK with this hack but will not scale if I start adding more (10+) relays.

[hek]

Are you sure you hadn't previously deleted a device with the same id/child id?

Vera sometimes keeps deleted devices in some hidden cache which is not cleared until you hard-reboot the box. If you try to add a new device with the same id it won't succeed until this cache is cleared.

[tbully]

@hek I've rebooted several times over the past few days while working on other sensors. However, your idea sounds valid.

So you're saying that I should be able to have multiple sensors running the example relay sketch on my network without issue, correct?

This should be fine because each individual node/arduino gets it's own ID so the relays on each Arduino should not conflict with its neighbors.