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Search - "humidity"
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I fucking hate Internet of Things, I think that it's a ridiculous idea to connect things, that work perfectly fine, to the internet.
The 'convenience' you get is minimalistic and most of the time non existent.
It is also often insanely insecure and expensive. The burdans it brings with it most of the time just outweigh the positive sides of it.
Now today happened something that made me hate it even more. Today was the First Lego Lego (Lego competition with ev3 robots, etc.) and one part of the tournament is to find a solution for a given problem. This year the general topic was hydro-dynamics and so the problem was how you can reduce water usage and 'save' water.
Our idea was to make reusable coffee cups and give them to the local coffee shops. One time use paper cups use take around 400ml water when produced) Basically you buy a cup once for 5 bucks and you get your coffee served in it. After drinking the coffee you return the cup to a local cafe and get a chip as pawn. When you buy your next coffee, you give them your chip and get it served in another reusable cup. The are at the moment already around 1000 cups going around the city.
Now this was our idea and we got ranked third. I am not too mad about our rank but what really drives me fucking mad is the team who ranked first.
Their idea was to make a pump (using an arduino) and a humidity sensor which you stick into a plant and the pump pumps water when the plant is too dry.
However (you probably guessed it already) they went a step further and connected it to the internet. They also made a web 'interface' for it so you can control the pump with your smartphone / computer / smartwatch / tv / whatever the fuck is connected to the internet nowadays 'thanks' to the iot 'revolution'.
So it is a pump that waters your plant when it is too dry BUT it is also connected to the internet.
WHY THE FUCK DOES THIS HAVE TO BE CONNECTED TO THE INTERNET.
"Oh look it is connected to the internet, wow awesome, oh it is also 'smart'. oh cooool. Nice I don't have to water my plants anymore"
A funny thing is that one of my friends built basically the same thing without connecting it to the internet. He built a small box with a pump and a humidity sensor that measures if the dirt is too dry and then waters the plant. It checks every few hours and the also is a small 16x2 LCD and a knob that you can turn to control how much water it should give the plant each time it waters it. He built it and I programmed it for him. Works perfectly fine and I don't see any reason why there should be any need to connect something like this to the internet.
Anyway we got ranked third, they first. I guess we should connect our coffee cups to the internet in some way ...17 -
Just found a 1000kV arc generator on AliExpress.. huehue :v
1 megavolt? That's the usual voltage level on lightning bolts. And with air's breakdown voltage of ~15kV/cm (could differ depending on humidity), you'd need nearly a meter of distance between the prongs *and* be able to achieve an arc between that distance without having shit arc internally, before you could ever reach 1MV. Yet arc generators' prongs are usually within 1cm of each other. I'd give it 10kV at best.
Also, they're generating the voltage of a lightning bolt for €3.65 apparently.. way too good to be true. Even components able to handle 10kV are quite costly, and components having a breakdown voltage of over 1MV is completely unheard of. I'm gonna buy one of those puppies to see how the circuit is designed and to zap the shit out of those bloody mosquitos in here - the only women that love me :'( - but I wouldn't be surprised if it just boosts the output voltage up to whatever until it can arc and short out. Completely unregulated of course.. which is fine but eh, I doubt that any of those components are rated for 1MV so probably the regulation is in smoking components acting like fuses when the prongs are too wide apart :v
As for the purpose of this rant.. nothing in particular really. Perhaps it'll educate some, I don't know. Just wanted to put it out there :)
Also if you'd like to watch some video material about this, you may find ElectroBOOM's coverage interesting: https://youtube.com/watch/...29 -
Some more of Stux's !dev pet peeves
1) Teenagers who comment shit like "I'm from the wrong generation" or "today's music is trash. This is real music" on songs from like the 70s and 80s. Like shut the fuck up. You can like whatever music you want, but your taste in music doesn't make you unique, so just shut the fuck up and listen to the music. I was jamming out to 70s and 80s when I was 9, so you aren't the first to enjoy older music at a young age
2) "Old heads" who comment shit like "this isn't real *genre*" on a new song that isnt like the older version of that genre. News flash: music fucking evolves. Just because that country song doesn't have a twangy guitar in it, that doesn't mean the song ain't country. Just because the rap song ain't some deep ass poetic shit, it doesn't make it any less of a rap song.
3) People who edit their comments on YouTube to say shit like "wow thanks for all the likes, I wasn't expecting this." Wooptie fucking doo. Your comment got a few thousand likes. Fun fact: those likes are meaningless.
4) Humidity. Fuck that shit man.
5) General education classes. They're a fucking pain in the ass man. Like im 98% confident I don't need art history in the real world. Or mythology. "tHeY tEaCh YoU tO lEaRn." Teach me to learn in degree specific classes then. At least their content will be interesting to me.
My name is Stuxnet. Thanks for coming to my TED talk again.20 -
Things you don't want to see at night
Ripped out of Netflix-Mode by a Warning notification and currently monitoring further development
Green line is temperature, blue humidity. Temperature rises at ~1°/10min, but seems to flatten just now. ~0.6°C to go and I'll have to head out. I'm thinking one of the ACs failed, but states are fine. Never trust a single information source for critical infrastructure guys15 -
FR rant
Warning : Do not use devRant in the lavatory, especially the shower.
So i was browsing devRant in the lavatory like a normal human being (?) and saw a post super funny, laughed so hard, and dropped the phone. Now the bottom left of my phone doesnt work.
So i was browsing devRant in the lavatory like a normal human being (?), went inside a shower without noticing that i went into the shower, turned on the faucet without noticing that i turned in the faucet, and i was attacked by fierce water with the pressure level 10 (10 is the max). Then i found out my favorite snoopy t shirt, which i wore just before coming into the lavatory, is wet. Completely. And water is dripping from my phone's charging port, but works flawlessly for 5 days.
So i was browsing devRant in the lavatory like a normal human being (?), writing this rant, and just because i feel tired, i moved a little bit and got my bottoms all wet which feels so bad...
So the final thing i would like to say is a feature request. Please check whether the user is in the shower or not. Lavatory is fine. But shower is not. You can use thr data retrieved from thw humidity sensor.
List of phones with humidity sensor : https://phonegg.com/list/...
Android sensor reference docs : https://developer.android.com/guide...9 -
Hey guys and girls ^~^
I hope this question is ok as it's not entirely dev related.
I'm planning on building a custom cattracking device that i can attach to a cat harness. It obviously has to be very small and light. This is why i had the pi zero in mind.
I want to track my cat via Gps and send location via gsm (and use a trigger if he connects to my wifi to set off an alarm so i can let him in).
My experience with pi's is limited but i have some with arduinos.
Besides that i would need a case which keeps the pi save from dust, humidity and maybe rain but won't interfere too much with the gsm signal.
First: is this even possible?
If yes, what would you recommend?
Are there better ways to do this?
Thanks to all in advance35 -
Transistor sizes are getting smaller and smaller by the day, though we cannot go below the size of a virus due to compartment limitation but the tiniest is smaller than a DNA.
Having chips designed at such a tiny scale looks more scary to me than amazing. Imagine my manager screaming at me, I can give him a slap on the face and infect him with 1 million A8 chips. Now that would be amazing because I just successfully turned him into an iPhone 6.
Me: Hey Siri, what's the weather now?
Manager: 32 degree Fahrenheit, high wind, low humidity.
Me: Yeah that's what's up, you won't be needing an upgrade anytime soon.10 -
I need a name for a new app.
It's a spur of the moment travel app that lets you select the temp and humidity ranges you want and finds you the cheapest flights.
Dazzle me please.40 -
Oh my God I fucking hate humidity
I've been without power for over 40 hours now. It's no big deal, but the fucking humidity makes it so fucking hot on my house and every fucking building.
It's about a nice and cool 70° f outside, but I'm still drenched in fucking sweat. Hopefully the power will be on soon.1 -
Do you remember how they say, you won't notice how much you miss something, until it's gone? Well this Island (Guadeloupe) is as beautiful as it can be! However the internet connection sucks. Big time!
Plus the humidity killed my laptop (or at least part of the keyboard including the keys I need for the partition unlock, which means no laptop until I'm home and replaced the keyboard.
I didn't bring it for work but to be able to look up stuff, maybee write some (non dev) stuff and such...
But to be honest since this vacation is so relaxing, I'm not even really mad. Strange.11 -
So I wrote my first IoT thingy...
And I'm looking for more ideas/feedback to improve it. Atm I have a raspberry pi collecting temperature, humidity and light all on different intervals (because I taught it'd be a challenge to have them all on different intervals ^.^) and I'm displaying that data on http://11601615.pxl-ea-ict.be/iot/ (I'm working on making it pretty).
So any ideas/feedback?6 -
During one of our visits at Konza City, Machakos county in Kenya, my team and I encountered a big problem accessing to viable water. Most times we enquired for water, we were handed a bottle of bought water. This for a day or few days would be affordable for some, but for a lifetime of a middle income person, it will be way too much expensive. Of ten people we encountered 8 complained of a proper mechanism to access to viable water. This to us was a very demanding problem, that needed to be sorted out immediately. Majority of the people were unable to conduct income generating activities such as farming because of the nature of the kind of water and its scarcity as well.
Such a scenario demands for an immediate way to solve this problem. Various ways have been put into practice to ensure sustainability of water conservation and management. However most of them have been futile on the aspect of sustainability. As part of our research we also considered to check out of the formal mechanisms put in place to ensure proper acquisition of water, and one of them we saw was tree planting, which was not sustainable at all, also some few piped water was being transported very long distances from the destinations, this however did not solve the immediate needs of the people.We found out that the area has a large body mass of salty water which was not viable for them to conduct any constructive activity. This was hint enough to help us find a way to curb this demanding challenge. Presence of salty water was the first step of our solution.
SOLUTION
We came up with an IOT based system to help curb this problem. Our system entails purification of the salty water through electrolysis, the device is places at an area where the body mass of water is located, it drills for a suitable depth and allow the salty water to flow into it. Various sets of tanks and valves are situated next to it, these tanks acts as to contain the salty water temporarily. A high power source is then connected to each tank, this enable the separation of Chlorine ions from Hydrogen Ions by electrolysis through electrolysis, salt is then separated and allowed to flow from the lower chamber of the tanks, allowing clean water to from to the preceding tanks, the preceding tanks contains various chemicals to remove any remaining impurities. The whole entire process is managed by the action of sensors. Water alkalinity, turbidity and ph are monitored and relayed onto a mobile phone, this then follows a predictive analysis of the data history stored then makes up a decision to increase flow of water in the valves or to decrease its flow. This being a hot prone area, we opted to maximize harnessing of power through solar power, this power availability is almost perfect to provide us with at least 440V constant supply to facilitate faster electrolysis of the salty water.
Being a drought prone area, it was key that the outlet water should be cold and comfortable for consumers to use, so we also coupled our output chamber with cooling tanks, these tanks are managed via our mobile application, the information relayed from it in terms of temperature and humidity are sent to it. This information is key in helping us produce water at optimum states, enabling us to fully manage supply and input of the water from the water bodies.
By the use of natural language processing, we are able to automatically control flow and feeing of the valves to and fro using Voice, one could say “The output water is too hot”, and the system would respond by increasing the speed of the fans and making the tanks provide very cold water. Additional to this system, we have prepared short video tutorials and documents enlighting people on how to conserve water and maintain the optimum state of the green economy.
IBM/OPEN SOURCE TECHNOLOGIES
For a start, we have implemented our project using esp8266 microcontrollers, sensors, transducers and low payload containers to demonstrate our project. Previously we have used Google’s firebase cloud platform to ensure realtimeness of data to-and-fro relay to the mobile. This has proven workable for most cases, whether on a small scale or large scale, however we meet challenges such as change in the fingerprint keys that renders our device not workable, we intend to overcome this problem by moving to IBM bluemix platform.
We use C++ Programming language for our microcontrollers and sensor communication, in some cases we use Python programming language to process neuro-networks for our microcontrollers.
Any feedback conserning this project please?8 -
Hey guys, my gf and I want to do something with the Arduino we got. We are getting a CS degree, so programming is not a problem, but we have quite basic knowledge of electronics.
What could be a cool simple (but not too introductory) project we could do?
The arduino came with a bunch of sensors (ultrasonic distance sensor, humidity, ...) some input (joystick, RFID reader/writer, buttons) and some outputs (LCD display, 8x8 LED matrix, bunch of color and RGB leds).16 -
I think that was that automated greenhouse thingy.
This is basically a Raspberry Pi with sensors, a fan and a water pump controlling the air circulation and watering of the greenhouse. The data from the sensors gets stored in a database and you can check the temperature & humidity history on a shitty web interface.
This was one of my very first projects and I'm really proud of finishing it although it's really not perfect. When I started it I had never worked with
1) databases
2) sensors on the raspi
3) webinterfaces
before and somehow managed to get it working.4 -
4 hours in a bathhouse. 80C, 60% humidity.
Boy am I sleeping like a ball of soft fresh wool tonight... 😁4 -
This not a rant, but I want to ask you some advice from you the community.
Before that I want to tell you about me. I have an invisible handicap. I'm half-deaf. I have some moderately severe loss between ~500 - 3000 Hz. To give you some idea, its in the range of clock ticking, whispering, piano notes, pronounced letters (m, n, p, h, g, ch and sh sounds), leaves crushing or waving in the wind.
I use hearing aids, however I can't always count on those because if it's too loud (ex: airplane flying over the building), I can't hear the voices that are speaking in that moment. Or sometimes the tubes where the augmented sounds are passing to my ear are repleted because of humidity. So I don't hear 100% better but rather in the range of ~70 - 80%.
I'm going to need to do an internship next year to finish my studies. Since I will take interviews, I want to ask you if I should mention those details to my interviewer or keep it very simple and tell him that I use hearing aids?
I ask you this because I know people with hearing aids had problems to find a workplace because the interviewers feared the "unknown". Some needed to sign up for help for handicapped people to receive a workplace. For them it is a downside because they are tagged as "handicapped" in society.
I know here are some interviewers and I wanted to know some advice from them as well from you guys of the community.
If you want to know more about hearing loss, feel free to ask questions.3 -
Need some help finding a free weather api please.
I need to be able to search the api based on temperature or humidity. Alternatively I could locally store the next 2 weeks of data for every country in a database and update it every night with a cron.
Has anyone used weather APIs before? Could you suggest me some?6 -
So I'm building this environmental monitoring system for one of the Labs to monitor Temperature and Humidity. the "software" that comes as part of the package with these sensors is really just a website you host yourself if you don't choose the cloud option. No big deal really, (see my previous rant about getting windows server through SSC) I setup IIS and get the "software" registered get a couple sensors running looks good. However I don't like the error messages that popup because it's unsecured. do some reading and I find out that most browsers will give you a warning if your not using HTTPS even if it's for internal use only. OK we'll how hard can it be in implement encryption, turns out it's not that hard and you can do it for free how with letsencrypt and other places. I like free, now i have to use SSH to get into the server and run an ACME client. Hey open SSH is part of windows now cool, download an ACME client SSH into the server and nope doesn't work. Oh right I'm behind a corporate firewall and a bunch of other shit I can't control. Why is so damn arduous to setup this god dam internal website and the problems aren't even the site. Now I'm playing with AWS spinning up an instance to be able to try and get an SSL certificate just so i don't have to tell people it's OK to trust this site ignore the big angry warning.
Best part is other similar internal sites don;t use SSL and all have big messages about someone stealing your soul if you go there and these are commercial systems that run all the HVAC for all the campuses across Canada.
I need more Tylenol. -
Was just doing 'work from home from hometown' since end of last month...
Using a Macbook Pro since couple of years now, it was such pleasure using it for developement!!
And suddenly the damn thing start to not like the humid climate here. Thing just don't turn on until it's like 10.30am and the humidity lowers a bit, since last few days.
No key combinations would help anymore!
Guessing I'll have to blow it dry from here on!!! Humidity doesn't know about the standup meeting, the damn aluminium piece of shit should!! Hope the goddamn thing won't suddenly give up on me forever during these sick times... :(
Never seen this kind of shit happening to a non-macbook!! Such marvelous things of design -- my ass!!
Goddamn quarter eaten fruit like piece of shit!!!5 -
!rant more advice needed for weather API
I am making a spur of the moment travel app built around a weather API. The problem is I need to feed in temperature and humidity for a date and get a list of countries and all the APIs I'm looking at work on location requests.
So, I plan to solve this using a JavaScript webworker and set intervals to build my own database that I can query.
Would it be better to use a script external to my API or keep the business logic internal?
Best answer receives my warm thanks.
P.S. @dfox there should be a non rant section?6 -
So as a personal project for work I decided to start data logging facility variables, it's something that we might need to pickup at some point in the future so decided to take the initiative since I'm the new guy.
I setup some basic current loop sensors are things like gas line pressures for bulk nitrogen and compressed air but decided to go with a more advanced system for logging the temperature and humidity in the labs. These sensors come with 'software' it's a web site you host internally. Cool so I just need to build a simple web server to run these PoE sensors. No big deal right, it's just an IIS service. Months after ordering Server 2019 though SSC I get 4 activation codes 2 MAK and 2 KMS. I won the lottery now i just have to download the server 2019 retail ISO and... Won't take the keys. Back to purchasing, "oh I can download that for you, what key is yours". Um... I dunno you sent me 4 Can I just get the link, "well you have to have a login". Ok what building are you in I'll drive over with a USB key (hoping there on the same campus), "the download keeps stopping, I'll contact the IT service in your building". a week later I get an install ISO and still no one knows that key is mine. Local IT service suggests it's probably a MAK key since I originally got a quote for a retail copy and we don't run a KMS server on the network I'm using for testing. We'll doesn't windows reject all 4 keys then proceed to register with a non-existent KMS server on the network I'm using for testing. Great so now this server that is supposed to connected to a private network for the sensors and use the second NIC for an internet connection has to be connected to the old network that I'm using for testing because that's where the KMS server seems to be. Ok no big deal the old network has internet except the powers that be want to migrate everything to the new more secure network but I still need to be connected to the KMS server because they sent me the wrong key. So I'm up to three network cards and some of my basic sensors are running on yet another network and I want to migrate the management software to this hardware to have all my data logging in one system. I had to label the Ethernet ports so I could hand over the hardware for certification and security scans.
So at this point I have my system running with a couple sensors setup with static IP's because I haven't had time to setup the DNS for the private network the sensors run on. Local IT goes to install McAfee and can't because it isn't compatible with anything after 1809 or later, I get a message back that " we only support up to 1709" I point out that it's server 2019, "Oh yeah, let me ask about that" a bunch of back and forth ensues and finally Local IT get's a version of McAfee that will install, runs security scan again i get a message back. " There are two high risk issues on your server", my blood pressure is getting high as well. The risks there looking at McAfee versions are out of date and windows Defender is disabled (because of McAfee).
There's a low risk issue as well, something relating to the DNS service I didn't fully setup. I tell local IT just disable it for now, then think we'll heck I'll remote in and do it. Nope can't remote into my server, oh they renamed it well that's lot going to stay that way but whatever oh here's the IP they assigned it, nope cant remote in no privileges. Ok so I run up three flights of stairs to local IT before they leave for the day log into my server yup RDP is enabled, odd but whatever let's delete the DNS role for now, nope you don't have admin privileges. Now I'm really getting displeased, I can;t have admin privileges on the network you want me to use to support the service on a system you can't support and I'm supposed to believe you can migrate the life safety systems you want us to move. I'm using my system to prove that the 2FA system works, at this rate I'm going to have 2FA access to a completely worthless broken system in a few years. good thing I rebuilt the whole server in a VM I'm planning to deploy before I get the official one back. I'm skipping a lot of the ridiculous back and forth conversations because the more I think about it the more irritated I get.1