justsmokedope
Well-Known Member
in theory you should be able to connect any sensor to a esp like a LI-190R Quantum Sensor and read the data
***SONOFF - WiFi Wireless Smart Switch***
- Thread starter Chronikool
- Start date
justsmokedope
Well-Known Member
or you can use a dht22 that does 0-100% humidity also
justsmokedope
Well-Known Member
found the sonoffs here the cheapest i could find as its Free world wide postage
the other like on this post you have to pay postage
https://www.banggood.com/SONOFF-POW-DIY-WIFI-Long-Distance-Power-Monitor-Current-Tester-Remote-Control-Switch-Socket-For-Smart-Home-p-1123797.html?cur_warehouse=CN
the other like on this post you have to pay postage
https://www.banggood.com/SONOFF-POW-DIY-WIFI-Long-Distance-Power-Monitor-Current-Tester-Remote-Control-Switch-Socket-For-Smart-Home-p-1123797.html?cur_warehouse=CN
Hurricane09
Well-Known Member
Anyone using a ppm sensor with these?
justsmokedope
Well-Known Member
yes as you can reprogram them like with most esp s the create there own wifi network lots on this on you tube and google or if you have a pi you could set up a web server and use that wifi network
or something like this perhapes https://www.npmjs.com/package/simple-sonoff-server
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justsmokedope
Well-Known Member
you can set up a old router that's not in the internet to give you a wifi network to connect it all to prob the simple est solution (intranet )
Randomblame
Well-Known Member
You could use the Sonoff RF to manually switch it on and off with an RF remote controller but you still need a wifi connection to set up the timer.
If the on and off times are programmed, the Sonoff should keep the settings even without wireless connection.
justsmokedope
Well-Known Member
do you know if there is a dimming using the app using the sonoff basic or is it just timer etc
i think there is a slide bar in the dropdown menu that allows dimming looking at a video but not sure
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whytewidow
Well-Known Member
Also wondering that? A dimming value would be sweet. Mine comes today.
noodle-led
Well-Known Member
Oh you just track temperature and humidity? That's cute. VPD and absolute humidity where you at!
I've also found that the all AMS2301 / DHT22 units I have hilariously misread the humidity, all being off by >10% compared to a LaCrosse weather station transmitter. I've even tried the BME280, which is within 4% of the LaCrosse. They seem to track fairly linearly though, so I just adjust the value with an offset to match it to the weather station.
DHT11 or 22 are cheap but there are better options!
May I ask you how do you measure the VPD? I already faced it in another user's post.
I am also interested to implement a Voltage and Current meter, how did you do yours?
noodle-led
Well-Known Member
Sure! The VPD is just a calculation based on the temperature and humidity, so it is easy to work out. I just have a node in my Node-RED that calculates it. I'm sure it can be converted to of the other automation platforms. Here is the code:
Code:
// saturated vapour pressure (Pa) at Temp (C)
function calcSVP(T) {
T=parseFloat(T);
var tmp = 7.591386*T/(240.7263+T);
return 611.6441*Math.pow(10,tmp);
}
var src = msg.payload.AM2301 || msg.payload.BME280;
var VPD=((100-src.Humidity)/100) * calcSVP(src.Temperature);
VPD = (VPD / 100.0).toFixed(2); // Convert to hPa
var out = { "topic": "VPD", "payload": VPD};
return out;Do you have a recommendation for a more accurate humidity sensor that won't break the bank? The BME280 is certainly better than the DHT22 but I'm always open to new options.
InTheValley
Well-Known Member
man, my sonoffs (4chanpro and 1 single)made it hands off now. I use a 3 gallon container for my watering ring, with a sonoff attached to a extension cord, then my pump plugged in, and now water every 8 hours for 1 minute. All i have to do is keep my res topped off everyother day.
I had to take the lid off the 4chan and blackout the wifi light blue beam, with electric tape, so, just keep that in mind if its in your growroom.
awesomeness.
I had to take the lid off the 4chan and blackout the wifi light blue beam, with electric tape, so, just keep that in mind if its in your growroom.
awesomeness.
whytewidow
Well-Known Member
It has begun....
I actually find that the bme280 is the best option in the 0-3$ price range. I red a whole test about different temp&rh sensors, I will post ghe link if I am able to find it once more
https://www.dfrobot.com/blog-45.html
https://www.intorobotics.com/pick-best-temperature-sensor-arduino-project/
http://www.kandrsmith.org/RJS/Misc/Hygrometers/calib_many.html
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Randomblame
Well-Known Member
It's just a timer, mate.
There is a "Sonoff LED" which is dimmable and has a few nice features but it's made for smaller LED lights.(42w max., 0,3-0,6A)
https://www.itead.cc/sonoff-led.html
justsmokedope
Well-Known Member
will figure out how to dimm my drivers remotely using another microcontroller perhapes on the dimming lead. but the sonoffs do have extra gpio pins that i think can be settup to send a 0-5 / 0-10v for a dimming lead but that is a hack though. i do have 16 sonoff s on the way to me so i should have a few left to mess with to try to make them do something fancy
i suppose youre going to connect sonoffs on the AC side, am I right?
You could dim a mw driver with a transistor and a mcu. If there are free slots inside a sonoff that should be enough
justsmokedope
Well-Known Member
i've got loads of wireless esps laying around that can dimm 0-5v and also have some pwm boards .
so i most likely will just pop one on the dimming lead and not mess with the sonoff too much prob only to install new firmware to help me get them working with mqtt and node red .
The other esps can be added to mqtt and node red also, and then i just need to control them with the node red dash for dimming