gman

gman

Build a Weather Station with Elixir and Nerves: %Mint.TransportError connecting from Pi to Phoenix on host

Hi All,

I’ve followed pretty much all of the book so have most of the pieces in place. Really enjoyed it so far!

Running on a rpi4. Using wifi to talk to the rpi4. I can ssh onto and download firmware to the rpi4 no problem. I can’t seem to get measurements off the rpi4 though.

From the log I get this message every 10s when the rpi4 tries to publish the measurements to the Phoenix server on my host machine:

23:31:03.506 [debug] Server response: {:error, %Mint.TransportError{reason: :econnrefused}}

My host machine is Windows 11, with WSL2 running ubuntu. On this machine I start phx.server logs:


graham@DESKTOP-Q3UO4M4:~/weather_tracker$ mix phx.server
warning: use Mix.Config is deprecated. Use the Config module instead
config/config.exs:8

warning: use Mix.Config is deprecated. Use the Config module instead
config/dev.exs:1

[info] Running WeatherTrackerWeb.Endpoint with cowboy 2.9.0 at 0.0.0.0:4000 (http)
[info] Access WeatherTrackerWeb.Endpoint at http://localhost:4000

I’ve set up the http://localhost:4000 in mu config/target/exs as:

config :sensor_hub, :weather_tracker_url,
http://localhost:4000/api/weather-conditions

So I think I have all that correct. But I receive no measurements. When I go on to the rpi4 I only see the messages wit the TransportError.

It feels like a network config problem but I’m new to nerves and elixir would appreciate any advice you have.

Many thanks,
Graham

First Post!

gman

gman

The timescaledb and postgres look all good - I can send ‘test’ measurements via curl and they are inserted into the DB.

I can also view those ‘test’ measurements in grafana so that side looks OK too.

It just seems to to be the connectivity between the rpi4 and Phoenix on my host PC :man_shrugging:

Where Next?

Popular Pragmatic Bookshelf topics Top

New
telemachus
Python Testing With Pytest - Chapter 2, warnings for “unregistered custom marks” While running the smoke tests in Chapter 2, I get these...
New
GilWright
Working through the steps (checking that the Info,plist matches exactly), run the demo game and what appears is grey but does not fill th...
New
jamis
The following is cross-posted from the original Ray Tracer Challenge forum, from a post by garfieldnate. I’m cross-posting it so that the...
New
sdmoralesma
Title: Web Development with Clojure, Third Edition - migrations/create not working: p159 When I execute the command: user=> (create-...
New
swlaschin
The book has the same “Problem space/Solution space” diagram on page 18 as is on page 17. The correct Problem/Solution space diagrams ar...
New
patoncrispy
I’m new to Rust and am using this book to learn more as well as to feed my interest in game dev. I’ve just finished the flappy dragon exa...
New
brunogirin
When I run the coverage example to report on missing lines, I get: pytest --cov=cards --report=term-missing ch7 ERROR: usage: pytest [op...
New
andreheijstek
After running /bin/setup, the first error was: The foreman' command exists in these Ruby versions: That was easy to fix: gem install fore...
New
davetron5000
Hello faithful readers! If you have tried to follow along in the book, you are asked to start up the dev environment via dx/build and ar...
New

Other popular topics Top

wolf4earth
@AstonJ prompted me to open this topic after I mentioned in the lockdown thread how I started to do a lot more for my fitness. https://f...
New
DevotionGeo
I know that these benchmarks might not be the exact picture of real-world scenario, but still I expect a Rust web framework performing a ...
New
AstonJ
SpaceVim seems to be gaining in features and popularity and I just wondered how it compares with SpaceMacs in 2020 - anyone have any thou...
New
New
AstonJ
Do the test and post your score :nerd_face: :keyboard: If possible, please add info such as the keyboard you’re using, the layout (Qw...
New
PragmaticBookshelf
Build highly interactive applications without ever leaving Elixir, the way the experts do. Let LiveView take care of performance, scalabi...
New
PragmaticBookshelf
Create efficient, elegant software tests in pytest, Python's most powerful testing framework. Brian Okken @brianokken Edited by Kat...
New
PragmaticBookshelf
Use WebRTC to build web applications that stream media and data in real time directly from one user to another, all in the browser. ...
New
First poster: bot
zig/http.zig at 7cf2cbb33ef34c1d211135f56d30fe23b6cacd42 · ziglang/zig. General-purpose programming language and toolchain for maintaini...
New
RobertRichards
Hair Salon Games for Girls Fun Girls Hair Saloon game is mainly developed for kids. This game allows users to select virtual avatars to ...
New

Sub Categories: