Add logging

Print some somewhat usefull log messages.

Cargo.lock

@@ -38,6 +38,17 @@ version = "1.0.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08f9b8508dccb7687a1d6c4ce66b2b0ecef467c94667de27d8d7fe1f8d2a9cdc"
 
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.1.0"
@@ -62,6 +73,34 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "env_logger"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b2cf0344971ee6c64c31be0d530793fba457d322dfec2810c453d0ef228f9c3"
+dependencies = [
+ "atty",
+ "humantime",
+ "log",
+ "regex",
+ "termcolor",
+]
+
+[[package]]
+name = "hermit-abi"
+version = "0.1.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "humantime"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
+
 [[package]]
 name = "libc"
 version = "0.2.124"
@@ -88,6 +127,15 @@ dependencies = [
  "pkg-config",
 ]
 
+[[package]]
+name = "log"
+version = "0.4.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6389c490849ff5bc16be905ae24bc913a9c8892e19b2341dbc175e14c341c2b8"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "mach"
 version = "0.1.2"
@@ -126,6 +174,8 @@ name = "mightyohm-gc-exporter"
 version = "0.1.0-dev"
 dependencies = [
  "anyhow",
+ "env_logger",
+ "log",
  "serialport",
 ]
 
@@ -182,6 +232,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "termcolor"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bab24d30b911b2376f3a13cc2cd443142f0c81dda04c118693e35b3835757755"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -198,6 +257,15 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"

Cargo.toml

@@ -11,3 +11,5 @@ categories = ["api-bindings", "command-line-utilities", "visualization"]
 [dependencies]
 anyhow = "1.0"
 serialport = "4.1"
+log = "0.4"
+env_logger = "0.9"

src/main.rs

@@ -1,4 +1,5 @@
 use anyhow::{bail, Error, Result};
+use log::{debug, trace};
 use std::{
     io::{BufRead, BufReader},
     str::FromStr,
@@ -33,6 +34,14 @@ fn parse(input: &str) -> Result<(usize, usize, f32, Speed)> {
         .replace(", ", " ");
     let input: Vec<&str> = input.split(' ').collect();
 
+    trace!(
+        "Parsed values: cps = {}, cpm = {}, μSv/h = {}, mode = {:?}",
+        input[0],
+        input[1],
+        input[2],
+        input[3]
+    );
+
     Ok((
         input[0].parse::<usize>()?,
         input[1].parse::<usize>()?,
@@ -42,6 +51,8 @@ fn parse(input: &str) -> Result<(usize, usize, f32, Speed)> {
 }
 
 fn main() -> Result<()> {
+    env_logger::init();
+
     let port_name = "/dev/serial0";
     let baud_rate = 9600;
 
@@ -53,7 +64,8 @@ fn main() -> Result<()> {
     loop {
         let mut line = String::new();
         port.read_line(&mut line)?;
-        println!("{:?}", line);
+        let line = line.trim();
-        println!("{:?}", parse(line.trim())?);
+        debug!("Reading line from serial port: {}", line);
+        let (_cps, _cpm, _radiation, _mode) = parse(line)?;
     }
 }