meteohub.de

Latest addendum to the family of supported "stations" is the low-cost SL-814 USB sound level meter. The meter can handle noise levels from 40 to 130 dB and can do measurement in frequency ranges A and C. You find these meters on ebay or other platforms at very low prices.
The meter can be purchased with and without USB cable. As the cable is not just a cable but has a USB-serial interface included that makes data readable on your USB port, I do recommend to get the ones with cable (Plugging in a USB cable you may have laying around won't do - as long as it is just a cable).

To make use of it with Meteohub/Meteoplug you have to operate it with an external power supply (9V 100mA). I choose to cut a USB enlargement cable, ripped 5V from it, transferred that to 9V by this chip (http://www.produktinfo.conrad.com/daten ... _0509S.pdf), and gave it a power connector fitting into the SL-814. Picture hides my poor soldering work underneath a shrink wrap. All these parts do come at about 10 Euro in total plus 30 Euro for the SL-814 (including USB cable). Running the meter on a 9V battery will not do, as the meter shuts automatically down after about 5 minutes to save battery life.
Meteohub (starting with version 4.8g) has the SL-814 as an additional "weather station" which gets data in dB in terms of a numeric sensor.

Can you help me? Where can I buy the usb cabel for this SL-814?
I bought the SL-814 without usb cabel (my mistake ) and now I can´t find on net this usb cabel. (this: http://sigrok.org/wiki/Device_cables#To ... -814_cable)

And second question, is it possibly connect to the meteohub higher models of sound lever meter (824, 834)? http://www.tondaj.cn/ce040_Eng/product. ... EL%20METER

I don't know where to get a SL-814 compatible USB cable that has the USB-serial converter included.
May be you ask the manufacturer/dealer?

I dont know, if the more feature reach upline meters do have the same USB protocol. So I cant say anything about compatibility.

I connected the SL-814 to the meteohub, meteohub sees devices, but the value is still 0 (on display of SL-814 is min 60 dBA). And this value (0) is only during connection. After that is sensor without update new datas and after 5 - 7 minutes sensor is disconnected (but the SL-814 is always on).
Then I have to disconnect and connect the usb and than I see again value 0 on a few minutes without update.
And second problem, If I add new station SL-814, on page with sensors I see 4 unknown sensors + 1 sensor sound lever.