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annotate rust/src/sensor.rs @ 635:4424a8b30f9c rust

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config crate wants everything to be lower case
author Matt Johnston <matt@ucc.asn.au>
date Sun, 22 Sep 2019 22:06:46 +0800
parents a5721c02d3ee
children a9f353f488d0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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: Option<ChannelRef<Readings>>,
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17 }
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18
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19 // #[derive(Clone)]
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20 pub struct TestSensor {
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21 config: Config,
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22 chan: Option<ChannelRef<Readings>>,
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23 }
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24
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25 #[derive(Debug,Clone)]
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26 pub struct SendReading;
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27
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28 impl Actor for OneWireSensor {
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29 type Msg = SendReading;
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30
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31 fn recv(&mut self,
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32 _ctx: &Context<Self::Msg>,
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33 _msg: Self::Msg,
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34 _sender: Sender) {
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35 self.chan.as_ref().unwrap().tell(Publish{msg: self.get_readings(), topic: "readings".into()}, None);
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36 }
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37
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38 fn pre_start(&mut self, ctx: &Context<Self::Msg>) {
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39 self.chan = Some(channel("readings", &ctx.system).unwrap());
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40 let dur = Duration::new(self.config.sensor_sleep,0);
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41 ctx.schedule(Duration::from_millis(0), dur, ctx.myself(), None, SendReading);
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42 }
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43 }
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44
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45 impl OneWireSensor {
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46 pub fn new(config: Config) -> Self {
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47 OneWireSensor {
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48 config: config.clone(),
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49 chan: None,
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50 }
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51 }
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52
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53 fn get_readings(&self) -> Readings {
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54 let mut r = Readings::new();
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55
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56 if let Ok(names) = self.sensor_names() {
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57 for n in &names {
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58 match self.read_sensor(n) {
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59 Ok(s) => r.add(n, s),
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60 Err(e) => debug!("Error reading sensors {}: {}", n, e)
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61 }
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62 }
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63 }
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64
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65 debug!("sensor step {:?}", r);
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66 r
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67 }
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68
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69 fn read_sensor(&self, n: &str) -> Result<f32, TemplogError> {
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70 lazy_static! {
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71 // multiline
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72 static ref THERM_RE: regex::Regex = regex::Regex::new("(?m).* YES\n.*t=(.*)\n").unwrap();
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73 }
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74 let mut path = PathBuf::from(&self.config.sensor_base_dir);
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75 path.push(n);
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76 path.push("w1_slave");
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77 let mut s = String::new();
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78 File::open(path)?.read_to_string(&mut s)?;
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79 let caps = THERM_RE.captures(&s).ok_or_else(|| {
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80 TemplogError::new("Bad sensor contents match")
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81 })?;
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82 let v = caps.get(1).ok_or_else(|| {
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83 TemplogError::new("Bad field contents match")
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84 })?.as_str();
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85
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86 Ok(f32::from_str(v)?)
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87 }
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88
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89 fn sensor_names(&self) -> Result<Vec<String>, TemplogError> {
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90 // TODO: needs to handle multiple busses.
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91 let mut path = PathBuf::from(&self.config.sensor_base_dir);
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92 path.push("w1_master_slaves");
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93
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94 let f = BufReader::new(File::open(path)?);
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95 let s = f.lines().collect::<Result<Vec<String>, io::Error>>()?;
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96 Ok(s)
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97 }
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98 }
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99
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100 impl Actor for TestSensor {
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101 type Msg = SendReading;
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102
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103 fn recv(&mut self,
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104 _ctx: &Context<Self::Msg>,
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105 _msg: Self::Msg,
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106 _sender: Sender) {
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107 self.chan.as_ref().unwrap().tell(Publish{msg: self.get_readings(), topic: "readings".into()}, None);
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108 }
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109
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110 fn pre_start(&mut self, ctx: &Context<Self::Msg>) {
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111 self.chan = Some(channel("readings", &ctx.system).unwrap());
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112 let dur = Duration::new(self.config.sensor_sleep,0);
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113 ctx.schedule(Duration::from_millis(0), dur, ctx.myself(), None, SendReading);
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114 }
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115 }
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116
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117 impl TestSensor {
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118 pub fn new(config: Config) -> Self {
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119 TestSensor {
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120 config: config.clone(),
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121 chan: None,
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122 }
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123 }
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124
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125 fn get_readings(&self) -> Readings {
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126 let mut r = Readings::new();
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127 r.add("ambient", 31.2);
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128 r.add("wort", Self::try_read("test_wort.txt").unwrap_or_else(|_| 18.0));
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129 r.add("fridge", Self::try_read("test_fridge.txt").unwrap_or_else(|_| 20.0));
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130 r
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131 }
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132
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133 fn try_read(filename: &str) -> Result<f32, TemplogError> {
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134 let mut s = String::new();
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135 File::open(filename)?.read_to_string(&mut s)?;
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136 Ok(s.trim().parse::<f32>()?)
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137 }
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138 }