best is an antenna with a controlled ground plane like a dipole or similar. stick antenna uses the pcb as ground plane and that is not tuned as an antenna part. you can use dipoles on walkitalkies to to get great reception.. ;) and wide band antenna isn't tuned good to any frequency. just equaly ...

As my pi is far from the counter, I would like to use a wemos d1 and send data via mqtt, is it possible to use this script to calculate instant power this way? You can count pulses on wemos and periodically send number of pulses via mqtt (resetting wemos counter to zero). And you will need to ...

Try strace, e.g.: sudo strace -s 1000 -e trace=writev,readv -fp "`pidof domoticz`" You will see serial calls among others and can narrow down to specific file descriptor that corresponds to interested serial port device. That if you want to debug with Domoticz running. Or you can stop domoticz and ...

You can use either temperature/humidity or voltage. Voltage has advantage that its pretty high precision.
Temperature/humidity allows to graph combine two independent values on one chart. Humidity good for "percentage" values (0-100%).

Try strace, e.g.: You will see serial calls among others and can narrow down to specific file descriptor that corresponds to interested serial port device.

Then unfortunately you need to send data to port (one of these are photodiode receiver) for it to respond.
Your only option to find out the spec document on the meter and check what protocol this port uses (and maybe if ready-made data adapter is available).

These two circles in a circle is an optical port.

Does one of them blink when gas is being used?

I believe you can try sending sketch version, but it should be sent "from sensor" (not from gateway). E.g. Serial.println("1;1;3;0;12;2.0.1") Not sure where domoticz will show it (and if it actually will show it anywhere at all). mysensors seem to have lot of commands "for future use" that current ...

Don't use I_PRESENTATION. Commands starting with I_ are sent between nodes and gateway.
When direct USB connect, you actually making a gateway (which has nodes inside it).

Abbadon wrote:i modiffied you script with my idx, changed ip i run as root, i can see gpio change with 'watch -d -n 0,1 gpio readall' but nothing happens, in log file i can see:

Try to change logging level to debug

logging.getLogger().setLevel(logging.DEBUG)

And see if gpio interrupts actually get called.

Well, this depends on what kind of valve it is. If its using motor or mechanical relay (inductive load), you will need some protection. But we are not talking about this one here. If its thermoelectric wax valve (purely resistive load), you don't need anything really - any simple transistor or triac ...

For 24V DC (and just 2W load, thats just 83mA) you don't really need relays or opto-isolation - its safe for direct connect by simple transistor.

Note that I need to operate 13 individual Valves, therefor I need a board with at least 13 relays BR Lars You don't really need to buy a complete board for that. Just buy SSRs in bulk, e.g. http://www.ebay.co.uk/itm/10-PCS-G3MB-202P-DC-AC-PCB-SSR-In-5V-DC-Out-240V-AC-2A-Solid-State-Relay-Module ...

To prevent unattended loss of communication/runaway boiler, etc, I use watchdog timers. E.g. in Arduinos I use watchdogs to feed them only when periodic communication (via usb-to-serial with Pi) received. If it breaks for long, Arduino node auto-reboots and re-establish communication. Similar ...

Any one done similar stuff? Willing to share? Thanks in advance BR Lars I use Pi 3 as central hub of my automated home. It runs custom Python script which implements multi-zone PID Controller ( https://en.wikipedia.org/wiki/PID_controller ). Temperature collected by sensors in the rooms - some are ...

AFAIK node id 0 reserved for gateway - you should not use it for sensors. I would recommend having different child Id per sensor, but same (non-zero) node Id - this should allow domoticz to know that they are for same meter. Also I don't see the presentation message. Domoticz will try to auto-detect ...

At the moment I'm not using Mysensors. I am considering to use a wired Mysensors network, is that possible? It is possible very easy, just make every device a mysensors serial gateway which does not need any kind of routing and talks sensor reports directly. However why would you use RS485? If your ...

MySensors serial protocol is extremely simple (https://www.mysensors.org/download/serial_api_20). All you just need your Arduino sensor sketch to print simple strings like "12;6;0;0;3;My Light\n" to USB serial. Then connect Arduinos to domoticz as mysensors serial gateways each. I also have most of ...

Hi! Unfortunately it seems that it shows only 1/10 of real usage. I have a meter where 1000 impulses is one Kw so your script should be correct also for me. Do you have any suggestions what should I check? In Domoticz settings check Meter/Counters => RFXMeter/Counter Dividers, maybe its not 1000 ...

Internal pull down is very weak, and generally only sufficient for connections ~15cm long.