refactor(config): update astarte device config

Now the configuration information to connect a device to Astarte are
provided inside a `astarte-device-DEVICE_ID_HERE-conf` directory, in
a `config.toml` file. Instead, all the information necessary to generate
samples to be sent to Astarte are provided via CLI or environment
variables.
Also the README have been update to explain how to configure the
application and build/run it.

Signed-off-by: Riccardo Gallo <riccardo.gallo@secomind.com>

.reuse/dep5

@@ -9,3 +9,7 @@ License: Apache-2.0
 Files: interfaces/*
 Copyright: 2024 SECO Mind Srl
 License: Apache-2.0
+
+Files: astarte-device-*-conf/*
+Copyright: 2024 SECO Mind Srl
+License: Apache-2.0

Cargo.toml

@@ -21,7 +21,10 @@ description = "Astarte Rust SDK based data stream test."
 astarte-device-sdk = "0.8.2"
 clap = { version = "=4.4.18", features = ["derive", "env", "string"] }
 color-eyre = "0.6.3"
+toml = "0.8.12"
 tokio = { version = "1.37.0", features = ["rt-multi-thread", "sync", "macros", "signal"] }
+tokio-stream = "0.1.15"
 tracing = "0.1.37"
 tracing-subscriber = { version = "0.3.0", features = ["env-filter"]}
 rand = "0.8.5"
+serde = { version = "1.0.207", features = ["derive"] }

README.md

@@ -4,7 +4,60 @@ Copyright 2024 SECO Mind Srl
 SPDX-License-Identifier: Apache-2.0
 -->
 
-# stream-rust-test
+# Astarte Stream Rust Test
 
 [![ci](https://github.com/astarte-platform/stream-rust-test/actions/workflows/ci.yaml/badge.svg)](https://github.com/astarte-platform/stream-rust-test/actions/workflows/ci.yaml)
 [![codecov](https://codecov.io/gh/astarte-platform/stream-rust-test/graph/badge.svg?token=wW2Hsm5edX)](https://codecov.io/gh/astarte-platform/stream-rust-test)
+
+Astarte Rust SDK based data stream test.
+
+Requirements
+============
+
+* Astarte Device Rust SDK
+
+Getting started
+===============
+
+## Choosing a Device ID
+
+A Base64 url-encoded uuid should be used, you can use [astartectl](https://github.com/astarte-platform/astartectl#installation) to generate one:
+
+```bash
+astartectl utils device-id generate-random
+```
+
+## Configuring the application
+
+Create a configuration directory `astarte-device-DEVICE_ID_HERE-conf` with a `config.toml` file inside it containing:
+- `realm`: the name of the Astarte realm.
+- `device_id`: the id of the device you want to connect to Astarte.
+- `pairing_url`: the URL of the Astarte Pairing endpoint. It should be something like `https://<api url>/pairing`.
+- `credentials_secret` or `pairing_token`: the identifiers used to authenticate the device through Astarte. If both are
+  present, the credential secret will be used.
+- `store_directory`: the directory specifying where persistent data will be saved.
+- `interfaces_directory`: the directory where the astarte interfaces used by the device are saved.
+
+## Build and run
+
+Build the application using following commands:
+```sh
+cargo build --release
+```
+
+Then run the application either by running the `run.sh` script inside the `scripts` folder or with the CLI:
+```sh
+./target/release/stream-rust-test [OPTIONS]
+```
+
+The full list of options can be shown with the command:
+```sh
+cargo run -- -h
+```
+
+Several options are available:
+
+- `--device` allows to set the device ID;
+- `--function` allows to choose the data generation function (one between `sin`, `noisesin`, `randomspikessin`, `saw`, `rect`, `sinc`, `random`, `x` and a default one);
+- `--interval` allows to set the sending interval;
+- `--scale` allows to scale the generated result;

astarte-device-DEVICE_ID_HERE-conf/config.toml

@@ -0,0 +1,7 @@
+realm = "REALM_HERE"
+device_id = "DEVICE_ID_HERE"
+pairing_url = "PAIRING_URL_HERE"
+credentials_secret = "CREDENTIALS_SECRET_HERE"
+astarte_ignore_ssl = false
+interfaces_directory = "INTERFACES_DIRECTORY_HERE"
+store_directory = "STORE_DIRECTORY_HERE"

scripts/run.sh

@@ -12,13 +12,6 @@ set -eEuo pipefail
 export RUST_LOG="debug"
 
 # Set application environment variables
-export REALM=""
-export DEVICE_ID=""
-export CREDENTIALS_SECRET=""
-#export PAIRING_TOKEN=""
-export PAIRING_URL="http://api.astarte.localhost/pairing"
-export STORE_DIR="/tmp/stream-rust-test/store"
-export IGNORE_SSL_ERRORS="true"
 export MATH_FUNCTION="sin"
 export INTERVAL_BTW_SAMPLES=500
 export SCALE=3