Hi, I am working in the farm.
Most our irrigation divided by different section. As photo, we use solenoid valve to control section open of close.
These solenoids mostly is 24V AC.
I saw other farms use this kind to control.
This is a Boron LTE borad with another one. I can't find the board brand or model. Any one has idea or other boards recommend?
the board function must have
- control solenoid valve, 24V AC or 5V DC
best to have:
2. can control two solenoids at a board
3. can monitor pressure (yes, with additional pressure meter)
4. can contact solar charge(no must)
Later on need:
5. GPS information, to show location
Thank you for your help.
First let me say that this is an area I am interested in.
I have developed a carrier board that does control water - but I made it for the Photon.
Please take a look and let me know if this is in the ball park. If so, I could relatively easily update it and change it over to the Boron.
I am also looking at using LoRA for agricultural use cases as a farm could have a number of sensors and actuators and LoRa could save money and enable longer battery life.
I clicke the page. It shows 404.
Are you getting the 404 error on the Github repo or on the Hackster article on its readme?
If the latter, please try this.
I am very sorry. The link was opening fine for me - but then I looked and saw it was private.
Fixed now, public repo. Sorry for the hassle.
Yes. It is working now.
Which country are you? I'm in California, US
I saw carry board is custom design. How cool is it? But if custom made, it would super expensive, right?
For this use case, I built a custom board it is not that expensive if you are willing / able to source the parts and solder them together. I like this approach as I get a device that is exactly what I want and this device has proven to be very rugged / reliable working for the past 5 years.
That said, with the Feather form-factor, they're pre-built solutions that may meet your needs. NCD has a number of options that work with Particle:
Hope this helps,
Often times those Rivulis Valves are actually Regulating Control Valves.
In other words, they operate as Pressure reducing valves within a control scheme.
From the picture, it appears to have the water tubing for the pilot valve to operate the valve as a regulator.
I mention this because you might Not be dealing with a "Solenoid" Valve.
This particular application may be depending on the Rivulis controlling the downstream pressure or flow, maybe not ?
For my case, I have two zone. Each zone control by solenoid valve 24vac. Now these are controlled by timer. But I would like change to IoT.
Whether or not you have power is going to decide a lot about what kind of device you need to buy / build.
For grid power situations, you can get away with a simple system that includes:
- AC / DC transformer for power for the Boron and peripherals
- Relay or two to drive AC solenoids
- Pressure sensor or two that could either be pressure switches (my preferred) or pressure transducers (either 4-20mA or 0-5V)
For off-grid power situations, which is most large ag, its quite a bit more complicated. You would need:
- Battery + Solar (the complicated part). Solar is required due to the Boron's power consumption and the panel needs to be above the canopy; there are systems that don't require solar that are built on 900mhz, see Nelson Irrigation
- DC Latching solenoids (important because they don't require constant current)
- H-Bridge + capacitor setup to drive the solenoids
- Pressure transducers, as above
Looking at the PCB image, I am a little confused about what kind of power and solenoid setup you have. It looks like a Baccara G75-0-11-4... 9V-12V dc latching solenoid. The only problem is that there is not a capacitor to drive a latching solenoid on that PCB. It may be that the boron and sensors are running on battery + solar and just switching power to an AC solenoid coming from a central point. It's also possible they left off the cap and hacked something together.
A good starting point for identifying solenoids is this PDF: https://nelsonirrigation.com/library/VM-3-Solenoids.pdf
This is the product I helped develop (on the Particle platform): https://altrac.zendesk.com/hc/en-us/sections/360004614654-Valves-ST160-161-. I no longer work there, but can get you in touch with someone that does work there if you are interested. Altrac is owned by Semios today and continues to sell both Altrac devices and a Nelson Irrigation integration.
Thank you. A lot of value information.
For the picture, it is solar plus a small battery.
This is whole picture.
For battery/power, this is no what I am concerned.
The point you said need a DC latch solenoid, it is new for me.
We have different farms.
Some close AC power and most setup with a timer controller. So we have all power ready. Just want to upgrade to iot remote control.
And, yes, pressure sensor will give us a good feedback to make sure it is running.
For DC latch solenoid, I saw a 5V solenoid in other farm. If just a purse to turn on switch, it should not require high current, right?
For the Relay or two to drive AC solenoids, because these relays have been setup with a timer controller.
I am thinking if I just wire them from timer to a board. Then Boton give it a signal to turn it. Then I don't need total a separate system. At the same time, this will allow the timer controller to continue as a manual control.
There are a lot of different solenoids in the world, so I don't want to speculate on what you have. If you have close up pictures of the solenoids, then I could give you a better idea of how to drive them.
For the AC solenoids, you could probably piece together something like this:
The DC latching solenoids are a bit different, as they are normally two wire and you have to be able to send a pulse in both directions. In a custom PCB you would have an H-bridge driver that allowed for this and a capacitor to deal with the pulsed current. To put something like this together with prototyping parts, you would need something like this: