Continuing to design my project around the Groveweatherpi system. Very cool platform.
Thought I would post an update as its been a while.
I have been working on a way to use the INA3221 boards I purchased to monitor my solar, battery, and load. I ran into problems due to the high current requirements. At this point I only have a single solar panel, charger, and battery. I'm estimating I could reach 5A but i hope to double that soon after I get this going. I decided to use 3x ACS712 20A current sense boards. I plan to connect them to the remaining 3 analog inputs on the ADC board (along with the wind vein). For voltage, I have ordered a 0v-25v Voltage sensor board. Basically a voltage divider on a board. I ordered 3 of those as well and am ordering another ADC board to connect those to.
I ended up purchasing the tinytrak4 and cables for my HT radio which I will mount on the same pole as everything else.
Working on board and wiring layout inside my nema 3x box. Terminal blocks fuses, etc.
That is where everything will end up mounted. Long story short, I purchased the pipe, cut it to size, with the help of my wife, painted it. Hand dug a 2ft x 2ft x 4ft hole in the ground. (Not something I want to do again) Wired up a rebar cage, intersecting with the pole. Lots of concrete later, we have a very solid place to mount the project!
Next post I'll add pics of where I'm at with the groveweatherpi wiring. Until then,
Last Edit: Jun 3, 2017 19:33:53 GMT -8 by af5cl: Got it working
John just put the Project Curacao2 up in Curacao. It's not all running yet (he hasn't connected the Wind/Rain sensors and hasn't mounted the system on the towers yet - lasy guy. Said something about having some beach time.....).
Weather instruments mounted on top of a rack, note the fan simulating wind
Inside the nema 3x box :
Here's one showing the wiring and tinytrack4 as well as the genasun mppt charge controller:
This box was originally designed to be used in oil refineries. I got it at a hamradio swap meet. It came brand new. It has a large master shutoff switch used with PLC industrial applications. After figuring out what it is, I've decided to use it as a master emergency shutoff switch for my application.
Notice the large industrial sealed conduit entry points in the second pic. I'm setting it up so that one carries data lines, and the other dc power lines.
Next post will include the shutoff switch.
Btw: I have been to Curacao! Would love to chat about that one day
Here's a couple more pics from inside the box with the terminal blocks, fusing, and master shutoff switch:
My battery(s) will be in another much larger box mounted on the pole with the controller box mounted above it. The weather instruments mounted at at the top along with radio antenna.
So that's where I'm at so far.
What would you consider maximum cable length for grove i2c cable? Same question for grove digital cable. I want to run a digital grove mosfet board down to the battery box to control a 12v fan but would like to tie it into the pi grover board located in the controller box.
Great pictures! John just installed the prototype SunControl board in the Project Curacao2 box and immediately got 1000ma of charge with no solar collapses. Ah, it is so nice to see the circuitry work they way I want it to.
We now leave it run in the sun for about 3 days and then install time. Put together all the WeatherRacks today.
How is the OLED being enabled when controlled by the power save module. Is it only active on boot or can you manually activate it? Maybe by pressing a momentary switch?
Also, I'm still not clear on how to wire up the dual watchdog board. Can you provide an example drawing or description? I think someone said I should use an arduino tied to the watchdog to monitor the pi zero?
As for my questions about the OLED and powersave, let try to ask ir a different way. To me, the purpose of the OLED, in this system is to get a quick status if I happen to be standing in front of the unit, which for me would be rare. Same for you. I guess what I'm asking is, what would trigger the powersave to re-enable the OLED so I could see it if I were to walk out to my box mounted outside?
If that is not possible, then why have it connected at all? Does that make sense?
If I were to use the power save module with it, how long would I be able to see the OLED on a fresh boot of the system?
So, those were my questions. My, idea/suggestion, was to trigger the power save to re-enable the OLED on a moment button press for a set amount of time, or if we get fancy, maybe on motion detection, or even when the box door is opened. See what I'm getting at?