Hello all,

i use a ATMEGA328P with internal clock (MysBootloader) and have a 4-channel relay board connected at the Arduino outputs D3-D6 (current MySensors Example Sketch).

As central unit i use a RaspberryPi with openhab 1.8 and a serial gateway (Arduino Nano) and the MySensors- OpenHAB serial binding of @bkl

The OpenHab item looks like this:

Switch Lights_Downlights_Front "Downlights Front" <selfLight> (Outdoor, Lights_Outdoor) {mysensors="54;1;V_STATUS"}

Unfortunately I can not switch the relays ON or OFF.
Many other sensors (Temp, Hum, Rain) works fine with this environment.

Any help is appreciated!

Greets & Thanks

@mbj No hurry, at the moment i´m waiting for parts from HK and can´t do anything until they arrive.
I communicate with an MQTT Gateway (Arduino Nano/ W5100/ NRF24l01) and MQTT binding (1.8.0) between the MySensor items and OpenHab (1.8.0).
I will build some sensors like described in this thread http://forum.mysensors.org/topic/2067/my-slim-2aa-battery-node
One of them will be a mailbox sensor with your sketch...

Very nice project, i would also like to build this mailbox sensor.
Could you please share the modified sketch and the tweaks for openhab... ?
Thanks in advance

@ahmedadelhosni and @BartE and @m26872 you made my day...!
Changing the NRF module was the solution, now my power consumption is about 8uA.
Now waiting for the PCBs and parts to build 10- 15 nodes

Thank you so much for your help

@m26872
I have already tested the "reed switch sensor" and it works fine for me- but with a power consumption of 2mA ...:-(
Is it possible that i have a problem with the bootloader or the fuses ?
How can i check that ?
Usually i use USBASP and avrdude for programming the processors on breadboards.
Is it also possible to do the whole programming with the arduino IDE ?

@AWI

No FTDI Adapter, no LED and nothing else is connected.
I build the node like the schematic in the first post.
When i start the sensor node, power consumption is about 16mA.
After a few seconds (4-5sec) the current goes down to 2mA

Can you please tell me, how to find out, that the node is in sleep mode
I have really no idea how to fix that.. but i have to, because i ordered the PCBs today!

Thanks for your help

Hello m26872,
your project is great, and i will order tomorrow a set of PCBs.
I've done a breadboard setup with the SI7021 according to your schematic and your sketch, which works flawlessly.
(ATmega328P / SI7021 / NRF24L01 / 2xAA Battery / your 1Mhz bootloader / your Fuse Settings)

Unfortunately I do not get the current consumption below 2mA.
What to do to get the power consumption below 10uA and to increase the battery life on a couple of years ?
Any help is appreciated...