I got a test circuit wired up yesterday afternoon with one temperature sensor and the arduino. It didn't work. I got out the multimeter and there was not voltage coming through the wire connected (through the breadboard) to the VCC contact in the arduino, even though there was voltage if I touched it to the arduino contact directly. Apparently something I'm doing with the headers is not quite right. I'll research and try to figure it out, but I'd be happy if anybody here has suggestions.
Ok, now we're cooking! @tekka, thanks for explaining some of the details that I was missing. I'm sure I read that before, but I guess I swapped "gateway" with "controller" in my head, assuming that the sensor node would be assigned an id by the gateway.
I placed the following in my sensor node's sketch:
#define MY_NODE_ID 2
This avoided any errors, but I still wasn't seeing the correct message come through MQTT.
Not sure if it was required, but I ended up having to add
#define MY_PARENT_NODE_ID 1
to the sensor node's sketch, and
#define MY_NODE_ID 1
to the gateway node's sketch. Once I did that, the temperature readings started showing up in MQTT!
Thanks for the help everybody. I still have quite a bit to learn, but getting a working sensor sending data all the way through the gateway to MQTT was the biggest hurdle to really making progress on implementing these. THANK YOU!
@petewill Thanks for explaining. That will be helpful if I get to the point where I can try to do something like this!
@petewill That's great! So do you basically have one ethernet cable going to each room and then split out the different wires within it to wire up the PIR and contact sensors within that room? What was the trouble with the temperature sensors? This page says you should be able to connect many of them to a single arduino pin, but I admit I haven't tried it with more than one.
I assumed this, but maybe it's better to ask. Do your PIR sensors and Temperature sensors get their power from the arduino they're connected to, or do they actually get it directly from your whole house power supply?
Can I suggest updated sourceforge to say that the code has been moved to github, and leaving little else there? That way it's easier to update everything in the same place. I was browsing on sourceforge for a while and wondering "Why isn't this on github instead?" It wasn't even until I came back and started skimming this thread that I realized it was moved to github.
What type of wires did you use for your contact sensors? I will hopefully be building a new house soon I was thinking of putting a separate node for each room or each door/window depending on floorplan, but if I could run all contact sensors to a single node, I think that would simplify it and make it a lot easier to put in place. On that same note, if you know, could you run wires for temperature sensors and PIR motion sensors or anything like that over longer distances similar to your contact sensors?
It took me a while, but I just figured out how to get a bootloader burned onto the chip and I'm ready to make my slim nodes! Which board type in Arduino IDE do I use to program the chip once I'm using the 6 pin header after it's installed in the PCB?
@Nca78 Thanks for your thoughts. I will try testing it with 5v and see what happens.
@mr_const said:
ybe that aliexpress listing has changed). Project uses same relay, but 5V version
Uggh, I just received 20 of the 12v ones yesterday that I purchased from the BOM link. Is it safe to say that these will absolutely not work, or is there some way to adapt them with a step-up converter or something?
@m26872, yes you are correct. I have the larger ones. I must have copied and pasted the wrong part number. Thanks for the quick response. That's helpful information!