Davis Envoy to Davis Weatherlink

[Rich Strle]

I upgraded from a Davis Vantage Pro (since 2001!) to a Davis Vantage Pro 2. I've been using a serial Weather Envoy to connect to my Raspberry Pi to feed weewx and then feed my website. It's worked very well for a long time.

I understand I need a 6510USB Davis WeatherLink Computer Interface. Is that a direct, drop in replacement for the Envoy? I don't see where there is differentiation from Envoy to Weatherlink as far as weewx is concerned.

[Greg Troxel]

The 6510USB or 6510SER will plug into the VP2 console and speak the
protocol over... USB or serial. I have a VP2/6510SER and it works
well, via a RPI3 running NetBSD.

I am unclear about Envoy, and whether it is able to receive the VP2 ISS
signals. I kind of have the impression that there is an Envoy for VP
and another flavor for VP2 but am really unclear.

Beware that weatherlink is a word used with lots of qualifiers and
"weatherlink foo" and "weatherlink bar" do not necessarily have closely
similar behavior.

https://www.davisinstruments.com/products/wireless-weather-envoy
That sort of looks like you need a 6510USB to plug into the Envoy, but I
have never seen, touched, or considered buying an Envoy.

I hope this helps you understand better.

[Tom Keffer]

Yes, the Davis Envoy will work with the VP2. In fact, it's what I use.

NB: the Davis Envoy 8x is a completely different beast. It is used to log data from many ISS's simultaneously. It is not compatible with WeeWX.

Agree with Greg. It's as if Davis has a list of about 6 approved names and all products must be labeled with something from that list.

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[Rich Strle]

Davis does not make it easy to discuss there products with their naming convention.

My wireless VP1 communicated with my VP1 console and the Davis Weather Envoy product number 6314. The Davis Weather Envoy was connected to my Pi via a serial to USB cable.

The VP2 is a wireless unit that connects to the new wireless WeatherLink Console that feeds their database.

Tom, what is the product number of your Envoy? I don't think my Envoy is talking to the new VP2.

[Tom Keffer]

It's a 6316. You will also need a logger, just like the console.  Ridiculously expensive for what you get.

I've always liked and admired Davis equipment, but they are very much behind the times when it comes to pricing and functionality.

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[Rich Strle]

I see, I need to get a new 6316 Data Envoy and a new data logger 6510USB Davis WeatherLink Computer Interface in order to upgrade my weather station from a VP1 to a VP2.

Tom, you have a 6314 Data Envoy and the USB data logger connected to a raspberry pi running weewx, correct? I want to be able to tell my wife 'well Tom said' when she questions this additional expense ; )

[Tom Keffer]

Yup. You need both!

Another option is an SDR connection, but then you'd have to add a barometer.

I have a model 6316, connected to an antique Fit-PC, a 32-bit machine about 15 years old.

Today, I'd use an RPi 4, or the soon-to-be-released RPi 5. Benchmarks.

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[Rich Strle]

Thanks Tom and Greg! I'm going to make a new question about 6100 Davis WeatherLink Live as a better option perhaps than the Envoy and data logger.