Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 
1799 posts

Uber Geek
+1 received by user: 124


  Reply # 1590953 13-Jul-2016 13:12
Send private message

There are some write ups on how to make a multi sensor with DHT11 hardware on www.mysensors.org

 

I have a few of these which are quite good, too. www.wirelesstag.net

 

They do require an active internet connection to store the data on the 'cloud' but i'm starting to think about sniffing this and storing it locally. It can't be THAT hard... right...?


267 posts

Ultimate Geek
+1 received by user: 39

Lifetime subscriber

  Reply # 1590977 13-Jul-2016 13:52
Send private message

Disrespective:

 

There are some write ups on how to make a multi sensor with DHT11 hardware on www.mysensors.org

 

I have a few of these which are quite good, too. www.wirelesstag.net

 

They do require an active internet connection to store the data on the 'cloud' but i'm starting to think about sniffing this and storing it locally. It can't be THAT hard... right...?

 

 

 

 

the wireless tags sound like a good idea. Pity the shipping seems expensive


 
 
 
 


1799 posts

Uber Geek
+1 received by user: 124


  Reply # 1590979 13-Jul-2016 13:57
Send private message

t0ny:

 

the wireless tags sound like a good idea. Pity the shipping seems expensive

 

Yeah, USD$50 isn't cheap. You are limited to about 6 sensors before you get up to the NZD400 import limit. I figure you could save some if you used a mail forwarder and were prepared to wait a bit longer, but it's still USD$10 to ship to the forwarder, and then maybe NZD$30 more (at the most) to get them to NZ, and our dollar was doing OK when I bought mine so figured i'd just pay the $50 and get them quick.


163 posts

Master Geek
+1 received by user: 34


  Reply # 1590990 13-Jul-2016 14:09
Send private message

I suggest an ESP8266 (module ESP-12F and ebay/aliexpress is your friend) with a DHT12 (better version of DHT11) or DHT22 or a DS18B20 (if you don't need humidity). A little development in Arduino IDE might be needed but that's pretty simple. There is also a ready made 220V module  from Electrodragon (search their site for ESP8266) that goes for $6 + shipping (just needs the sensor soldered in). Can't get cheaper than that! There are tons of Instructables on the internet on how to do this.


163 posts

Master Geek
+1 received by user: 34


  Reply # 1590992 13-Jul-2016 14:11
Send private message

Oh and yes, I have all this running at home quite successfully.

 

Come to think of it I have an Electrodragon and sensor left that I could sell you. Probably comes to just under NZ $20.


1586 posts

Uber Geek
+1 received by user: 156

Trusted

  Reply # 1591007 13-Jul-2016 14:22
Send private message

davidcole:

 

I've just put a DHT11 Sensor on a Raspberry pi I had spare.  Not currently wireless but it could be, and then I added a python script to talk to Maker which updates a google drive spread sheet every 10 mins.  

 

Then I added a second script to output to ThingSpeak.com so it can make some pretty graphs for me.

 

The APIs for both were pretty simile and took < 10 mins each to get going.

 

 

 

 

Can you please share more details? Very keen to trial this as an easy starting point. Where did you get the DHT11 in NZ?





CPU: Intel 3770k| RAM: F3-2400C10D-16GTX G.Skill Trident X |MB:  Gigabyte Z77X-UD5H-WB | GFX: GV-N660OC-2GD gv-n660oc-2gd GeForce GTX 660 | Monitor: Qnix 27" 2560x1440

 

 


4133 posts

Uber Geek
+1 received by user: 554

Trusted

  Reply # 1591012 13-Jul-2016 14:28
Send private message

mentalinc:

 

davidcole:

 

I've just put a DHT11 Sensor on a Raspberry pi I had spare.  Not currently wireless but it could be, and then I added a python script to talk to Maker which updates a google drive spread sheet every 10 mins.  

 

Then I added a second script to output to ThingSpeak.com so it can make some pretty graphs for me.

 

The APIs for both were pretty simile and took < 10 mins each to get going.

 

 

 

 

Can you please share more details? Very keen to trial this as an easy starting point. Where did you get the DHT11 in NZ?

 

 

I didn't.   I used aliexpress.  They were about $4USD each I believe.  Came with a 120mm 3 wire cable (Dupont crimp it's called I've since learned).  So Also on Aliexpress I bought some longer dupont crimpped cables (cheaper than buying a crimp and didn't feel like cutting and soldering).

 

Then once connected - I''ve kept the page somewhere, there was a github clone to do to pick up the Adafruit Python DHT driver.  Once that compiled it didn't take much to take their example page and hack together a json string to upload to either Maker (for google drive) or ThingSpeak.

 

 Edit: Added picture.

 

 Click to see full size

 

 

 

The UPS details are from Nut-CGI.  I just added the ThingSpeak embeddable image to the page.

 

 





Previously known as psycik

NextPVR: 
Gigabyte AMD A8 Brix --> Samsung LA46A650D via HDMI, NextPVR,
OpenHAB: ODroid C2 eMMC DriveOpenHAB with Aeotech ZWave Controller, Raspberry PI, Wemos D1 Mini, Zwave and Bluetooth LE Sensors
Media:Chromecast v2, ATV4, Roku3, HDHomeRun Dual
Windows 2012 
Host (Plex Server/Crashplan): 2x2TB, 2x3TB, 1x4TB using DriveBender, Samsung 850 evo 512 GB SSD, Hyper-V Server with 1xW10, 1xW2k8, 2xUbuntu 16.04 LTS, Crashplan, NextPVR channel for Plex,NextPVR Metadata Agent and Scanner for Plex


1 | 2 
View this topic in a long page with up to 500 replies per page Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Geekzone Live »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.