[danner]

Happy to report only one blip of 1 W/m2 last night so it appears we've narrowed it down to the TX board.

Will have to wait until a completely clear day to observe the readings at sunrise, noon, and sunset, compared to others near me.

Thanks.

[werk_ag]

... Also set the clipping to 0.

Happy to report only one blip of 1 W/m2 last night so it appears we've narrowed it down to the TX board.

Will have to wait until a completely clear day to observe the readings at sunrise, noon, and sunset, compared to others near me.

Thanks.

Just don't do of keeping the "clipping" at zero, a perpetual goal. It may not be possible.
For all the rest, I think that you already have the knowledge to deal with it.

[danner]

Just don't do of keeping the "clipping" at zero, a perpetual goal. It may not be possible.

A visible transition between night and day, rather than an abrupt off and on, was what I was hoping for. Thanks.

[werk_ag]

I understand what you mean, however if you consider that, per example, a transition from 0 to 4, it's an abrupt transition, perhaps this is not the equipment you need, nor even the SP-110.
In the real world a transaction like this will happen in just a few minutes (depending on latitude an longitude, and the month of the year), perhaps less than 5 to 6 minutes). Considering the cost, compared to the alternatives, I think that its an acceptable compromise.

As a side note I'm negotiating with the guy from where you bought your SP-110, to bought one, or even more units. He seems a nice person.

[danner]

True, however, 0 to 4 is much less abrupt than 0 to 15, which is what I had to previously set the clipping to. From what I can see, so far it is functioning exactly how I envisioned it should function. Watching the other solar readings near me they all show a transition rather than an on/off behavior, but that's moot since it is functioning "properly" now.

He said he was willing to ship to Europe so hope you can get a good deal from him.

Thanks again.

[werk_ag]

...
He said he was willing to ship to Europe so hope you can get a good deal from him.

The shipping cost to Portugal is astronomic, more than the price of the product.
I checked the price at USPS so I know he is not inflating the price. That's a thing I never understood: why the shipping costs from US to any EU country are so high.
How the Chinese have solved the problem of the shipping cost?

[danner]

I don't know. My sister lives in Ireland and it costs a small fortune to send her anything.

[werk_ag]

@danner: you may like this:

Even "discarding" the readings below a certain threshold, we also can make that they "appear" that are starting at 1 W/m2.
We never know the source code of "commercial products", but I will not be surprised if "solutions", like the one presented below, would be frequently used, to avoid a more complex (expensive) hardware design.
Of course, this "solution" will introduce a minimal error to all readings.

Code:

#if (Solar_Sensor == 2)      // Apogee SP-110: Self-Powered Pyranometer (Solar / UV interface R2= 4700 Ohm)
 if (RX_Data[2] < 4) RX_Data[2] = 0;        
 SolarRad = map(RX_Data[2], 4, 1023, 0, 1750);
#endif

One thing is sure: The cost of the Solar/UV interface does not reward the time and efforts that I have to spend to supporting it. So, once the board will be out of stock, it will not be publicly available again.

[hornychz]

How the Chinese have solved the problem of the shipping cost?  

We are told that postage is subsidized by the government. Personally, I'm willing to believe it. 

[hornychz]

One thing is sure: The cost of the Solar/UV interface does not reward the time and efforts that I have to spend to supporting it. 

How much did it take hours? 10, 15, ...?