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annotate rust/src/sensor.rs @ 633:490e9e15b98c rust

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move some bits to riker
author Matt Johnston <matt@ucc.asn.au>
date Wed, 04 Sep 2019 23:24:13 +0800
parents bde302def78e
children a5721c02d3ee
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
632
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1 use riker::actors::*;
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2
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3 use std::time::Duration;
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4 use std::io;
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5 use std::fs::File;
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6 use std::io::{Read,BufReader,BufRead};
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7 use std::path::PathBuf;
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8
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9 use std::str::FromStr;
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10
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11 use super::types::*;
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12 use super::config::Config;
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13
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14 pub struct OneWireSensor {
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15 config: Config,
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16 chan: ChannelRef<Readings>,
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17 }
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18
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19 struct SendReading;
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20
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21 trait Sensor {
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22 }
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23
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24 impl Actor for dyn Sensor {
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25 type Msg = SendReading;
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26
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27 fn recv(&mut self,
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28 ctx: &Context<Self::Msg>,
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29 msg: Self::Msg,
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30 sender: Sender) {
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31 self.chan.tell(Publish{msg: self.get_readings(), topic: "readings".into()}, None);
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32 }
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33
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34 fn post_start(&mut self, ctx: &Context<Self::Msg>) {
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35 self.chan = channel("readings", &ctx.system).unwrap();
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36 let dur = Duration::new(self.config.SENSOR_SLEEP,0);
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37 ctx.schedule(Duration::from_millis(0), dur, self, None, SendReading);
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38 }
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39 }
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40
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41 impl OneWireSensor {
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42 pub fn new(config: &Config) -> Self {
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43 OneWireSensor {
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44 config: config.clone(),
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45 }
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46 }
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47
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48 fn get_readings(&self) -> Readings {
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49 let mut r = Readings::new();
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50
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51 if let Ok(names) = self.sensor_names() {
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52 for n in &names {
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53 match self.read_sensor(n) {
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54 Ok(s) => r.add(n, s),
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55 Err(e) => debug!("Error reading sensors {}: {}", n, e)
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56 }
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57 }
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58 }
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59
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60 debug!("sensor step {:?}", r);
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61 r
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62 }
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63
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64 fn read_sensor(&self, n: &str) -> Result<f32, TemplogError> {
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65 lazy_static! {
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66 // multiline
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67 static ref THERM_RE: regex::Regex = regex::Regex::new("(?m).* YES\n.*t=(.*)\n").unwrap();
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68 }
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69 let mut path = PathBuf::from(&self.config.SENSOR_BASE_DIR);
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70 path.push(n);
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71 path.push("w1_slave");
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72 let mut s = String::new();
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73 File::open(path)?.read_to_string(&mut s)?;
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74 let caps = THERM_RE.captures(&s).ok_or_else(|| {
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75 TemplogError::new("Bad sensor contents match")
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76 })?;
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77 let v = caps.get(1).ok_or_else(|| {
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78 TemplogError::new("Bad field contents match")
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79 })?.as_str();
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80
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81 Ok(f32::from_str(v)?)
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82 }
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83
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84 fn sensor_names(&self) -> Result<Vec<String>, TemplogError> {
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85 // TODO: needs to handle multiple busses.
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86 let mut path = PathBuf::from(&self.config.SENSOR_BASE_DIR);
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87 path.push("w1_master_slaves");
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88
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89 let f = BufReader::new(File::open(path)?);
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90 let s = f.lines().collect::<Result<Vec<String>, io::Error>>()?;
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91 Ok(s)
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92 }
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93 }
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94
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95 impl Sensor for OneWireSensor {
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96 }
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97
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98 #[derive(Clone)]
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99 pub struct TestSensor {
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100 config: Config,
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101 }
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102
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103 impl TestSensor {
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104 pub fn new(config: &Config) -> Self {
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105 TestSensor {
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106 config: config.clone(),
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107 }
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108 }
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109
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110 fn test_step() -> Readings {
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111 let mut r = Readings::new();
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112 r.add("ambient", 31.2);
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113 r.add("wort", Self::try_read("test_wort.txt").unwrap_or_else(|_| 18.0));
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114 r.add("fridge", Self::try_read("test_fridge.txt").unwrap_or_else(|_| 20.0));
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115 r
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116 }
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117
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118 fn try_read(filename: &str) -> Result<f32, TemplogError> {
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119 let mut s = String::new();
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120 File::open(filename)?.read_to_string(&mut s)?;
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121 Ok(s.trim().parse::<f32>()?)
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122 }
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123 }
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124
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125 impl Sensor for TestSensor {
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126 }
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127