#16 in Temperature & humidity measurement tools
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Reddit mentions of Vktech DS18b20 Waterproof Temperature Sensors Temperature Transmitter (5pcs)
Sentiment score: 5
Reddit mentions: 11
We found 11 Reddit mentions of Vktech DS18b20 Waterproof Temperature Sensors Temperature Transmitter (5pcs). Here are the top ones.
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- 9 ~ 12 adjustable resolution
- Power supply range:3.0V-5.5V
- No other components, unique single bus interface
- Output lead:red (VCC), yellow(DATA) , black(GND)
- able length:Approx.100 cm
Features:
Specs:
Color | As shown |
Height | 0.39 Inches |
Length | 39.37 Inches |
Width | 0.39 Inches |
Note, links here with a [!] are ones not in the album.
Off to the right is a desk which has been converted to a ghetto entertainment center. I'd rather buy servers than furniture! My apartment is absolutely tiny anyway, like 600 SQFT. Logitech 2.1, Dell S2740L. I'd not pay that much for a dashboard monitor, but, I use it for media as well, so the price of it new when I got it, nearly 450 after taxes/shipping, was worth it.
The last two graphs honestly tell me a LOT. ELK Stack is WAY more powerful than I thought. Unfortunately I don't like how Kibana's dashboards look, so save the geoIP stuff, I am using Grafana all the way. TODO: Get the Pie chart plugin working!
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Power is metered/controlled with THIS switch. Make sure you have no way of shutting this off! Else you cut power to the whole lab. So far it hasn't had any random-shutoff issues. So I'm happy.
This lab has taught me A TON, entertained me during off hours, given me uninterrupted sanctuary, prepped me for exams, and everything. After I get MCSA, the R710s + C2100 will be clustered to teach me much more advanced stuff for VCP5/VCP6 study.
I'm a fan of the DS18b20s, I don't use the land line in my house so I disconnected the phone line at the junction box outside, put Rj-11 connectors on the end of some ds18b20s and viola whole home temperature readings for about $10! One wire for the win! Vktech DS18b20 Waterproof Temperature Sensors Temperature Transmitter (5pcs) https://www.amazon.com/dp/B00CHEZ250/ref=cm_sw_r_cp_api_um4Gyb2TX32HQ maybe a little more than $10...
I used DS18b20 Temperature Sensors. I tied them down to each component. It's difficult to see in the gif, there is a small aluminium cylinder on top of the CPU heat sink. That's the module.
I'm just about to leave town for a few days, but I'll link you what I have so far. Here are the various parts I am using:
This pump for water
This power supply for my 12v items
This relay board to control valves and the pumps
And these valves
an esp8266 for wifi connectivity with main control computer
Several of these ds18b20 temperature sensors
And these water level float sensors
Beyond that, its just arduino stuff and glue logic, like shift registers and whatnot.
EDIT - also the usual electric brewery stuff, ie water heater elements. Those I've wired to relays to be controllable by the arduino as well.
I had parts laying around so I decided to build a temperature monitor instead of having multiple individual thermometers. My buddy wanted one and i thought, "these have to be a thing", but i cant find them. It seems like the only product that has multiple temperature probes is an expensive controller.
Does anyone know if these things exist on the market?
For those interested, this is just a led segment display, arduino, and i2c temperature probes. You could build this for $20 - $30. I have the code but would encourage someone to try it on their own, its a pretty good beginner project.
Yes, I will post a link. Red breadboards are just for convenience. One has 16 resistors. You need 1 resistor for each relay because relays are 3.3v and board is 5v. 1K to 3K seem to do the job. And the other board only has 3 connectors for DS18b20 Waterproof Temperature Sensors along with 10K pull down resistor.
Mostly Wemos D1 Mini and whatever USB supply I have at hand (have had good luck with Motorola dual-ports). I like the idea of the Feathers, but haven't run into an application yet for myself where I want to put up with periodically recharging the device.
For indoor temp/humidity sensors, Amazon seller HiLetgo (and probably others) sell a D1 Mini shield with a DHT22 prewired to D4. Between those parts and ESPEasy, it takes about 15-20 minutes to put a new sensor together.
For outdoor and remote temp, I grabbed a 5-pack of ds18b20 probes from Amazon. Each probe has a unique ID in rom which ESPEasy honors, so multiple sensors can be wired in parallel (on the same bus) and still be read separately. For ease of wiring, D3 supplies the power, D4 is the data (pulled up by the LED), and GND on the Mini is right next to D4.
All publish to Mosquitto, of which Home Assistant is a subscriber.
I would say about $25-$30 with parts and everything. Once you have the code for one, putting it on others would be quick and simple. It would be a good option for future projects as well since you could just add other things to the board.
Screen
Temp sensor
I will find the script in a bit but basically you take a DS18B20 temperature sensor and hook it up to the GPIO pins. In some part of whatever Raspberry Pi distribution config utility you're using, will be an option to enable I2C connectivity.
Basically you run the cat command to get the temperature of the sensor, have a script to write that to a file with a timestamp, and make a cron job to run that every minute. You can then have another script to alert you if the temperature gets above a certain level. Some temperature logging tutorials want some sort of SQL but you can do this without it.
edit: here's the pastebin with the two scripts. The cronjob entry looks like this:
> * /root/thermcron.sh
Why didn't you just go with a pre-made and cheap option? Waterproof DS18B20's are all over the place. I use these for the monitor on my reeftanks which would arguably be a much more harsh environment than a greenhouse.
DS18b20 Waterproof
If you're after quick and cheap, then you could do worse than the Ds18b20 sensors in the waterproof housing ( https://www.amazon.co.uk/dp/B00CHEZ250/) - they use the 1-wire protocol so are easy to get working with the devices you're looking at using.
If you want something a bit more substantial and industrial, DM me and I'll contact some of our suppliers to get some options for you.