Solar Powered Mini-Weather Station

  • @Salmoides

    I really like the way you express yourself in: "Decades later now, I’m finally re-living my childhood with MySensors. It was fun back then and it is again."

    This exactly describes the way I think about "Mysensors".


  • Admin

    Yeah, but back then we didn't have all these fun, cheap breakout boards. They are like pick and mix sweets for us amateurs. 🙂

  • Hero Member

    @Salmoides Well Done!! I love it!! and to answer your question... Yes,, an LED will illuminate if no one is there to see it.. 🙂

  • What a great project. I'm also a beginner, having a new hobby with my sons, looking back to my own childhood... One question, your luxmeter, is it hidden behind the collector? Does he gets direct sunlight? Does it works with direct sunlight?

    Looking forwards to your next project!


  • @floris, Thank you for your kind words. The luxmeter faces down, so the light is indirectly collected through the diffuser. If I were to build V2.0, I would look into adding a light pipe to provide more direct lighting on the sensor.


  • you are welcome, thank you for sharing! I'm going to use a waterproof box with a transparent cover. did you connect your hum/temp to d4, rain to d3 and lux to a4 and a5? ( i dont have the barometer yet)

  • @floris, Yes, those are the pins I used. The BMP085 is also I2C, using the same pins as the lux sensor.

  • Great, thanks.

  • @floris Thanks for sharing.

    Do you use the battery provided with the solar panel ?


  • @Totche, the original 3v7, 1000mAh lion battery is tucked under the circuit board. You can see the arch of the plastic cover toward the bottom of the picture on the left, just below the DHT22. It is connected to the circuit with the black and red wired connector so it can easily be removed when working with the device.

  • Hi, did you feed the NRF24L01 directly from the 3.7 V battery? The specs are alowing 3.6 V max?!? And you are taking about a maximum output of over 4 V of the battery.
    That sound not healthy for the NRF.

  • @Andreas-Maurer You can connect the NRF24 on the VCC out from the arduino. because he used an arduino nano pro on 3.3 volt. and the arduino can handle voltages from 3.3 to 12 DC.

  • Hi, I have my weatherstation up and running. The only problem is my rainsensor. It's totally not accurate. Do you have the same?


  • @floris, you have to adjust the sensitivity of the rain sensor. I splashed some water on the sensor pad and used a small screwdriver to adjust the potentiometer on the interface board until it triggered to my satisfaction. It took a few iterations to get it to trigger at the level I was looking for.

  • @Salmoides
    How is this sensor performing? I assume it has to be mounted where it can receive direct sunlight for charging the solar panel. Do you have problems with sunlight heating the enclosure and elevating temperature readings? I intercept readings from my neighbor's 433Mhz outdoor sensor and the temperature soars when the sensor is under direct summer sunlight.

  • @Salmoides great thread and project

    Was trying to follow the wiring on the back side of the board to wire my project and was wondering how you wrap the wires around the posts sticking through the board for soldering.
    Also is there a wiring diagram?

  • @5546dug Wire wrapping is done with a wire wrapping tool, it is done in lieu of soldering and can be easily undone or 'unwrapped'. It was very common for prototyping in the past.

  • @Dwalt Thanks for info but the slant I get from you is this is the old way and now it is just plain soldering.
    I also see wire size is an issue.

  • Hero Member

    @Salmoides said:

    Then I found this.


    It’s entitled “16 LED Solar Power Motion Sensor Security Lamp Outdoor Waterproof Light” ( that you can get for $9.00. I now had a $21 weather station ready to be built.

    Taking apart the lamp, I removed the LED panel (worth at least $2.00) and the control board (this has some good stuff on it like a PIR, a light sensor, and the battery charging circuitry, but its use is well beyond my skills), and put them away for another project.

    @Salmoides I mesure less than 1 V at the solar panel wires, which cannot power up the regulator for the arduino.

    Do you have the same mesure ?

  • Hero Member

    @epierre said:

    @ mesure less than 1 V at the solar panel wires, which cannot power up the regulator for the arduino.

    Do you have the same mesure ?

    I have a couple of these units as well and just checked one. It's a cloudy day, but under a bright light it reported 4.3V at the solar panel wires. You might have a bad unit.


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