I just received a weather station from a friend who is moving. It includes an Apogee SP 215SS Pyranometer.
Interfacing it to a Wemos D1 Mini should be easy since it’s output is an analog from 0-5V.
My question is, why would I? What does a pyranometer bring to my IOT that a simple solar cell would?
Or, should I just put it on eBay since used ones are going for north of $200?
I know what it does, I was wondering why? What would it do for my IOT that I couldn’t accomplish with a solar cell into an analog port?
I use the one in my weather station to calculate the efficiency of my solar panel arrays. Daily averages:
It’s based on the manufacturer’s reported efficiency and surface area of the panels.
I’m not really interested in the actual magnitude of the result, just how it changes over time. I paid extra for panels that are supposed to hold their efficiency longer.
template:
- sensor:
- name: "PV A Efficency"
unit_of_measurement: "%"
state: >
{% if states('sensor.pv_power_a')|float(0) > 0 %}
{{ ( states('sensor.weatherflow_solar_radiation')|float(0) * 348 / states('sensor.pv_power_a')|float(none) )|round(0,default=none) }}
{% else %}
unknown
{% endif %}
Good luck getting a panel manufacturer to honor their “guarantee”.
But since Solar is in my future, I may just keep the Pyranometer for that purpose.
Good luck getting a panel manufacturer to honor their “guarantee”.
But since Solar is in my future, I may just keep the Pyranometer for that purpose.
I can think of a reason.
To trigger an automation: if solar radiation > x then run scene (switch a b c devices on)
Hello,
Could someone tell me where I can find a tutorial to integrate a RS485 pyranometer driven by an esp32?
Thanks for your help,
patrickp78
Use a TTL to RS485 converter.
Many thanks,
May be some tutoriel or example exist?
Which esp32 must be connected? I have a 2102-02 model. Is that ok?
You’ll undersand I’m not an expert with that…
patrickp78
Any ESP should be OK. My go-to ESP is the Wemos D1 Mini because it’s cheap, easy to breadboard and has enough GPIO ports for my projects.
I have never used RS485, but you might find someone who has. RS485 is basically a hardware protocol that permits serial data over long distances. You connect the Rx on the ESP to the Tx on the adapter, and Tx to Rx. Also 3.3V and ground. The sensor data will have a + and - that connects to the adapter. After that, you just treat it like any serial data.
Since this is a very old thread, it isn’t likely to be seen by many. I suggest you start a new thread.
Many thanks for all these advises. I’ll do it
