I have 4 sensors (temp/hum and contact switch) powered by 3V coin battery and with the library 1.5.4 they run for a year. I also decided to upgrade them to the library 2.1.1 and I got some issues. For example the binarysqwitchsleepsensor doesn't sleep. I also noticed that the initialization has many messages sending failure and that is a heavy blow for the battery, I went back to the 1.5.4.

I had similar issues. I had a serial GW with a NRF24L01+PA+LNA and the option MY_RF24_PA_LEVEL to HIGH and worked for more than one year; than I decided to convert it to an Ethernet GW and I had many failure in sending messages. When I was out of ideas (after checking connection wiring and power issues, adding capacitor, making the ugly shield fix) I decided to play with the MY_RF24_PA_LEVEL, and it started to work again with the value MIN.

I want also to specify that my sensor was running under library 1.5.4. At the moment I'm experiencing an issue under the library 2.1.1 that makes the sensor continuously wake up, so the battery discharges itself after few hours. Better under library 2.0.0 but the initialization process has many transmissions failure that give to the battery a heavy blow.

Hi,
I have some Door/window sensors, powered by a cr2032 coin battery and I was able to run them for 1 year. The sketch above it seems ok, but the secret it's not only the software, it depends on hardware too:

• remove voltage regulator and led from the arduino
• choose a ceramic decoupling capacitor for your radio module, and avoid electrolytic capacitors (they have a bigger leakage current)
• I don't use any step-up converter, and use the battery to power both the radio module and arduino (reported both to work at 3V)
• a capacitor (again ceramic) of 100uF across the cell’s terminals could sustain a peak current load.

It's also better to avoid messages sending in a short time, and put some sleep in the middle, but I don't see that situation in the sketch.

yep

Yesterday evening I was in my living-room when a bad, and well knew, from who works with electronic, smell came out. I suddenly thought that something was burning and after few minutes I found out that my gateway was not working anymore. Unfortunately I realized that one of the capacitor of my nano clone was completely burned. Now I'm without gateway and waiting for a new one (this time an original one).
That's only to share my frustration.

Hi,
very interesting project. How did you choose the fan? Did you calculate the CFM or something else (f.i. why Silent 14 and not 12)? How do you assemble the fans, will you replicate any of the commercial solutions?
Thank you.

Great news!

Regarding OH, I didn't have the opportunity to play with the v2.0 yet, I'm still on 1.8.1.
I have a serial mysensors gateway and this is my set up:

OH (v1.8.1) <-> OH MQTT binding (as MQTT client) <-> Mosquitto (as MQTT server) <-> mosquitto to serial (python script that reverts messages with topic mysensors to the serial port and vice-versa) <-> serial gateway.

So my items in OH are based on mqtt binding.

I guess OH2 and mysensors openhab binding make everything easier.

Which module are you using? if it is NRF24L01+ be sure it is the "plus" version.

Hi,
you can try this:

if (message.type==V_RGB)
{
      char convBuffer[8];
      hexstring = strtol(message.getString(convBuffer),0,16);
      Serial.println(hexstring);
      r=(int)(hexstring>>16);
      g=(int)(hexstring>>8)& 0xFF;
      b=(int)(hexstring)& 0xFF;
}

Hope it helps.