Wireless sensor with 2 inputs: temperature and PIR

[Manuel B]

Hello,

I have not found one answer to my problem on the web so I would be grateful if one of you could help me.

I would like to use one wireless sensor to send 2 inputs (temperature and movement). I read that reed switch or buttons personalities can send 2 inputs but I couldn't find any example of use to do what I want to do.

I understood that I have to use one wireless box to temperature and another one to read PIR Sensor input. I hope to be wrong ;-)

Thanks in advance.

Bye!

[Gadjet Nut]

Hi,

We don't have a sensor like that available but it can be quite easily developed using the RFu-328. If you have some programming knowledge it wouldn't be too difficult to develop. The RFu-328 is an wireless Arduino so there is a lot of material available on the internet that shows you how to configure a motion sensor and a temperature sensor on an Arduino. All Arduino code will work on the RFu-328. 

We have a tutorial here that will help you get started with the RFu-328.

If anyone else is interested in this combo sensor then please reply to this post and we'll develop a new sensor and/or write up a tutorial.

Hope that helps!

[Manuel B]

Hi,

I thought to use this wireless base station http://www.privateeyepi.com/store/index.php?route=product/product&path=66&product_id=66 and case kit http://www.privateeyepi.com/store/index.php?route=product/product&path=66&product_id=69.

So do you say I could do it using the same case kit but changing wireless base station?

Bye

[Gadjet Nut]

The wireless base station connects to the raspberry Pi using the slice of Pi breakout board.

You can connect as many wireless sensor as you like to the base station like:

 - Temperature sensor

 - Wireless switch

 - Wireless temperature and humidity

 - Rfu-328 programmable wireless Arduino 

You can put the above sensors into the wireless sensor case kit.

[Manuel B]

Hi,

Sorry, I wrote "wireless base station" and I meant "wireless sensor case kit".
Anyway, your answer is ok because I wanted to know if I could put Rfu-328 into wireless sensor case kit.

I promise this is my last question tonight ;-)
I have in mind use "wireless switch" to make the PIR and another "Wireless temperature and humidity" to control temperature. Now with your indications about Rfu-328, I could use only "one board" to read temperature and PIR signals. My question is, how many inputs could I get with Rfu? I mean, imagine I would like to use light sensor, gas sensor, PIR and temperature all using one Rfu-328, could it be possible?

Bye!

[Gadjet Nut]

Yes you can put the Rfu-328 into the wireless sensor case kit. 

The RFu-328 has 9 digital input pins and 5 analog pins. So you could have up to 14 sensors attached to it if you wanted to. The analog inputs are very useful because the Raspberry Pi does not have any analog inputs. There are many more analog sensors available on the market that digital sensors.

Using the coin cell battery power from the wireless sensor case kit may become an issue for two reasons:

1. Some sensors (like motion sensor) require a dedicated power supply

2. The RFu-328 might require dedicated power to monitor the sensors

One of the unique features of the RFu-328 is able to go into a deep sleep and use very little power. The RFu-328 also have a timer that you can use to awaken the device. You can use this for temperature, light and gas sensors so every X minutes you awaken the device read the sensors, send via RF, and then go back to sleep. For door switches and motion sensors you can tell the RFu-328 to awaken when a switch is triggered.

So depending on your sensor power consumption you might need to use a couple AA batteries instead of the coin cell battery.

Here is the technical specification for the RFu-328 : http://projects.privateeyepi.com/rfu-328/rfu-328-technical-data