I’m looking for a reasonable inexpensive smoke detector with presence detection to make light and heating more intelligent. I know that running that on battery will be a challenge but nains power supply can be done as I have mostly false ceilings.
It should have presence detection not only movement!
I’m planning to hack an existing one but With the security aspects I whould feel more save with an of the shelf solution.
It should run on wireless communications! 868mhz or wifi preferred with an open protocol!
I understand you are looking for a more complete solution, but I thought I’d share what a colleague did. The problem I’ve seen is that the z-wave smoke detectors were not triggered when any of the other non z-wave detectors went off. He simple bought the add - on module for his standard detectors and then used a monoprice door/window through it’s external switch add on. Total cost was around $35 and it will still work when you replace your standard detectors every 10 years.
Presently, the API is cloud based. Nest has a protocol called Nest Weave that will allow local connectivity, but I don’t think it’s available yet to the public.
I’m really interested in this one. I think I can imagine pretty well how it works (I have some ESP2866-based MQTT sensors) - but how easy was it to capture and decode the communications from the sensor? I’d like to integrate a few of the home security sensors on sale from Banggood into my OpenHAB setup. Thanks! - Tim
I use the rcswitch library. The good point is cheaper is the sensor simpler is the RF decoding. By using the gateway and banggood sensors I was able to easily integrate less 5euros sensors to my home automation system. I m going to publish the code of the gateway in the next days if you are interested
Yes I certainly am interested in the code! When you publish it, could you please just let me know by replying to this post (so I get an email notification)? Thanks!
I am looking for smoke detectors with wireless communication to each other.
I thought of using the last one in a modification just for getting the signal with an Relais. So I could implement in raspberry gpio pin the smoke detectors.
Perfect would be a potential free contact together with wireless function.
Are there any models out there?
Hi there, I’m looking for similar things smoke interconnect detectors, Honeywell have ti, but with closed protocol so i’m looking forward for similar product, but with open protocol. Detectors have to expand range within each other, and any of them must be capable to share informations with setted communicator based on arduino …
thanks for all ideas … if solve it, or find related product, will post here…
have a nice day
Did you find a way to receive the signal from an 433 MHz smoke detectors in Openhab? I would also like to switch to cheaper smoke detectors because more and more of my Fibaro smoke detectors are failing for some reason. I simply cannot buy multiple new smoke detetors every year for this price.
To receive the signal I’am using an Adafruit Huzzah32 and a modified version of the RC Swtich Library. I had to do multiple modifications to the library because the signal from the smoke detectors is very different from e.g Intertechno remotes.
I also wrote some code to provide a REST interface on the Huzzah32 that could be used from Openhab to send signals (the smoke detectors could theoretically also be used as alarms this way) and to receive signals. The code is still in development, but I could share it if any of you is interested.
Edit: In the meantime I replaced the REST interface with an MQTT interface because the Webserver libraries were to slow or to unstable to handle multiple requests. The Huzzah32 is no also able to send data back to Openhab with MQTT. I will publish all my work to GitHub when I tested this.
You will need an Adafruit Huzzah32 and an 433 Mhz sender and receiver for this like this one. (The sender only if you also want to send commands to switches or other 433 Mhz equipment) You will also find the Autodesk Eagle files to order an Adafruit Feader compatible pcb board to connect the sender and receiver.
@TheNetStriker I just find your project by looking for smoke detectors and the openhab integration possibilities. Really interesting. After a year I would like to know if you would still recommend to copy your project. Or would you recommend something else now?
Thank you for sharing all this! Great job
I indeed am looking for a better alternative to the 433 Mhz signal. I’ve just modified one of my cheap smoke detectors to send an MQTT signal using an ESP8266. I designed a small pcb that fits into the smoke detector. The board connects to 3 points on the smoke detector board. (9V, Ground and the alarm pin) If the board detects a smoke alert on the pin of the smoke detector it converts 9V to 5V and outputs this voltage on another pin. This then powers up the ESP8266 which sends the MQTT packet. The cool thing about this design is that this could power anything with a low enough power consumption. (e.g. a LoRa microcontroller)
I’m currently testing how much impact this additional circuit has to the battery life of the smoke detector. So far it runs for about 3 months without any batterie issues. You can see the circuit in action here: https://everycircuit.com/circuit/6139384246829056/9voltswitch
If you are interested I could provide the Eagle files of the pcb and instructions on how to connect it to the smoke detector. Every smoke detector could be different, but the main chip that is used is often the same.
so i’m looking forward for similar product, but with open protocol. Detectors have to expand range within each other, and any of them must be capable to share informations with setted communicator based on arduino …