support rtl433 temp sensors

README.md

@@ -1,10 +1,12 @@
 # taspromto
 
-Publish tasmota state into prometheus
+Publish tasmota (and other) state into prometheus
 
 ## What
 
-Taspromto listens to messages published by tasmota devices to MQTT and presents the data in a prometheus compatible format.
+Taspromto listens to messages published by tasmota (and other) devices to MQTT and presents the data in a prometheus
+compatible
+format.
 
 ## Usage
 
@@ -26,10 +28,12 @@ The following tasmota data is supported
 - CO² levels for [MH-Z19 sensors](https://tasmota.github.io/docs/MH-Z19B/)
 - Power and Gas levels from [supported P1 smart meters](https://tasmota.github.io/docs/Smart-Meter-Interface/)
 - Particle concentration from PMS5003 sensors
+- 433Mhz temperature sensor readings from [`rtl_433`](https://github.com/merbanan/rtl_433)
 
 ## Xiaomi MI Temperature and Humidity Sensors
 
-Tasmota can expose temperature and humidity data from Xiaomi sensors, to expose these sensors you need to configure the names for the sensors.
+Tasmota can expose temperature and humidity data from Xiaomi sensors, to expose these sensors you need to configure the
+names for the sensors.
 
 This is done by setting the `MITEMP_NAMES` environment variable to comma separated key value pairs of the last 6 digits
 of the MAC address of the sensors and the desired name.
@@ -37,3 +41,16 @@ of the MAC address of the sensors and the desired name.
 ```dotenv
 MITEMP_NAMES="351234=Bedroom,352468=Living Room"
 ```
+
+## 433Mhz temperature sensors
+
+Taspromto can parse data 433Mhz temperature sensors send to MQTT by [`rtl_433`](https://github.com/merbanan/rtl_433).
+
+rtl_433 needs to be configured to send it's output to the `rtl_433[/model]` topic, then sensors can be configured by
+setting
+the `RF_TEMP_NAMES` environment variable to comma seperated key value pairs. Where the key is the sensor model, id and
+channel.
+
+```dotenv
+RF_TEMP_NAMES="Bresser-3CH:73:1=Front Yard,Bresser-3CH:73:2=Attic"
+```

src/config.rs

@@ -1,7 +1,7 @@
-use crate::device::BDAddr;
+use crate::device::{BDAddr, RfDeviceId};
 use color_eyre::{eyre::WrapErr, Report, Result};
 use rumqttc::MqttOptions;
-use std::collections::BTreeMap;
+use std::collections::{BTreeMap, HashMap};
 use std::str::FromStr;
 use std::time::Duration;
 
@@ -11,7 +11,7 @@ pub struct Config {
     pub mqtt_port: u16,
     pub host_port: u16,
     pub mi_temp_names: BTreeMap<BDAddr, String>,
-    pub rf_temp_names: BTreeMap<u8, String>,
+    pub rf_temp_names: HashMap<RfDeviceId<'static>, String>,
     pub mqtt_credentials: Option<Credentials>,
 }
 
@@ -54,14 +54,15 @@ impl Config {
             .split(',')
             .map(|pair| {
                 let mut parts = pair.split('=');
-                if let (Some(mac), Some(name)) = (parts.next().map(u8::from_str), parts.next()) {
+                if let (Some(channel), Some(name)) = (parts.next(), parts.next()) {
-                    let channel = mac.wrap_err("Invalid RF_TEMP_NAMES")?;
+                    let device_id =
-                    Ok((channel, name.to_string()))
+                        RfDeviceId::from_str(channel).wrap_err("Invalid RF_TEMP_NAMES")?;
+                    Ok((device_id, name.to_string()))
                 } else {
                     Err(Report::msg("Invalid RF_TEMP_NAMES"))
                 }
             })
-            .collect::<Result<BTreeMap<u8, String>, Report>>()?;
+            .collect::<Result<HashMap<_, _>, Report>>()?;
 
         let mqtt_credentials = match dotenvy::var("MQTT_USERNAME") {
             Ok(username) => {

src/device.rs

@@ -1,9 +1,12 @@
 use color_eyre::{eyre::WrapErr, Report, Result};
 use jzon::JsonValue;
 use rumqttc::{AsyncClient, QoS};
+use std::borrow::Cow;
 use std::collections::{BTreeMap, HashMap};
 use std::convert::TryFrom;
 use std::fmt::{self, Debug, Display, Formatter, Write};
+use std::num::ParseIntError;
+use std::str::FromStr;
 use std::time::Instant;
 use tokio::task::spawn;
 
@@ -12,7 +15,8 @@ pub struct DeviceStates {
     pub devices: HashMap<Device, DeviceState>,
     pub dsmr_devices: HashMap<Device, DsmrState>,
     pub mi_temp_devices: BTreeMap<BDAddr, MiTempState>,
-    pub rf_temp_devices: BTreeMap<u8, TempState>,
+    pub rf_temp_devices: HashMap<RfDeviceId<'static>, TempState>,
+    active_rf_temp_id: RfDeviceId<'static>,
 }
 
 impl DeviceStates {
@@ -59,7 +63,10 @@ impl DeviceStates {
 
     pub fn update_rf(&mut self, payload: &str) {
         if let Some(data) = parse_rf_payload(payload) {
-            let state = self.rf_temp_devices.entry(data.channel).or_default();
+            let state = self
+                .rf_temp_devices
+                .entry(data.device_id().to_owned())
+                .or_default();
             state.humidity = data.humidity;
             state.temperature = data.temperature;
         } else {
@@ -67,14 +74,42 @@ impl DeviceStates {
         }
     }
 
+    pub fn update_rtl(&mut self, device: &str, field: &str, payload: &str) {
+        if self.active_rf_temp_id.name != device {
+            self.active_rf_temp_id = RfDeviceId::default();
+            self.active_rf_temp_id.name = device.to_string().into();
+        }
+        match field {
+            "id" => self.active_rf_temp_id.id = payload.parse().unwrap_or_default(),
+            "channel" => self.active_rf_temp_id.channel = payload.parse().unwrap_or_default(),
+            "temperature_F" | "humidity" => self.update_active_rtl(field, payload),
+            _ => {}
+        }
+    }
+
+    fn update_active_rtl(&mut self, field: &str, payload: &str) {
+        let state = self
+            .rf_temp_devices
+            .entry(self.active_rf_temp_id.to_owned())
+            .or_default();
+        match field {
+            "temperature_F" => {
+                state.temperature = payload
+                    .parse()
+                    .map(|temp_f: f32| (temp_f - 32.0) * 5.0 / 9.0)
+                    .unwrap_or_default()
+            }
+            "humidity" => state.humidity = payload.parse().unwrap_or_default(),
+            _ => {}
+        }
+    }
+
     pub fn mi_temp(&self) -> impl Iterator<Item = (&BDAddr, &MiTempState)> {
         self.mi_temp_devices.iter()
     }
 
-    pub fn rf_temp(&self) -> impl Iterator<Item = (u8, &TempState)> {
+    pub fn rf_temp(&self) -> impl Iterator<Item = (&RfDeviceId<'static>, &TempState)> {
-        self.rf_temp_devices
+        self.rf_temp_devices.iter()
-            .iter()
-            .map(|(channel, state)| (*channel, state))
     }
 
     pub fn retain(&mut self, cleanup_time: Instant, ping_time: Instant, client: &AsyncClient) {
@@ -481,11 +516,11 @@ pub struct TempState {
 
 pub fn format_rf_temp_state<W: Write>(
     mut writer: W,
-    channel: u8,
+    channel: &RfDeviceId,
-    names: &BTreeMap<u8, String>,
+    names: &HashMap<RfDeviceId, String>,
     state: &TempState,
 ) -> std::fmt::Result {
-    let name = if let Some(name) = names.get(&channel) {
+    let name = if let Some(name) = names.get(channel) {
         name
     } else {
         return Ok(());
@@ -494,16 +529,16 @@ pub fn format_rf_temp_state<W: Write>(
     if state.temperature > 0.0 {
         writeln!(
             writer,
-            "sensor_temperature{{channel=\"{}\", name=\"{}\"}} {}",
+            "sensor_temperature{{model=\"{}\", id=\"{}\", channel=\"{}\", name=\"{}\"}} {}",
-            channel, name, state.temperature
+            channel.name, channel.id, channel.channel, name, state.temperature
         )?;
     }
 
     if state.humidity > 0 {
         writeln!(
             writer,
-            "sensor_humidity{{channel=\"{}\", name=\"{}\"}} {}",
+            "sensor_humidity{{model=\"{}\", id=\"{}\", channel=\"{}\", name=\"{}\"}} {}",
-            channel, name, state.humidity
+            channel.name, channel.id, channel.channel, name, state.humidity
         )?;
     }
     Ok(())
@@ -781,6 +816,49 @@ struct RfPayload<'a> {
     humidity: u8,
 }
 
+impl<'a> RfPayload<'a> {
+    pub fn device_id(&self) -> RfDeviceId<'a> {
+        RfDeviceId {
+            name: Cow::Borrowed(self.name),
+            id: self.id,
+            channel: self.channel,
+        }
+    }
+}
+
+#[derive(Hash, PartialEq, Eq, Debug, Clone, Default)]
+pub struct RfDeviceId<'a> {
+    name: Cow<'a, str>,
+    id: u16,
+    channel: u8,
+}
+
+impl RfDeviceId<'_> {
+    pub fn to_owned(&self) -> RfDeviceId<'static> {
+        RfDeviceId {
+            name: Cow::Owned(self.name.to_string()),
+            id: self.id,
+            channel: self.channel,
+        }
+    }
+}
+
+impl FromStr for RfDeviceId<'static> {
+    type Err = ParseIntError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let mut parts = s.splitn(3, ':');
+        let name = parts.next().unwrap_or_default();
+        let id = parts.next().unwrap_or_default().parse()?;
+        let channel = parts.next().unwrap_or_default().parse()?;
+        Ok(RfDeviceId {
+            name: name.to_string().into(),
+            id,
+            channel,
+        })
+    }
+}
+
 fn parse_rf_payload(payload: &str) -> Option<RfPayload> {
     let mut parts = payload.split(";").skip(2);
     let name = parts.next()?;

src/main.rs

@@ -78,7 +78,7 @@ async fn serve(device_states: Arc<Mutex<DeviceStates>>, config: Config) {
                 format_mi_temp_state(&mut response, *addr, &mi_temp_names, state).unwrap()
             }
             for (channel, state) in state.rf_temp() {
-                format_rf_temp_state(&mut response, channel, &rf_temp_names, state).unwrap()
+                format_rf_temp_state(&mut response, &channel, &rf_temp_names, state).unwrap()
             }
             response
         });
@@ -141,6 +141,11 @@ async fn mqtt_client<S: Stream<Item = Result<Publish>>>(
                 let mut device_states = device_states.lock().unwrap();
                 device_states.update_rf(payload);
             }
+            Topic::Rtl(device, field) => {
+                let payload = std::str::from_utf8(message.payload.as_ref()).unwrap_or_default();
+                let mut device_states = device_states.lock().unwrap();
+                device_states.update_rtl(&device.hostname, &field, payload);
+            }
             topic @ (Topic::Water(_)
             | Topic::Gas(_)
             | Topic::Energy1(_)

src/mqtt.rs

@@ -10,6 +10,7 @@ pub async fn mqtt_stream(
     client.subscribe("stat/+/+", QoS::AtMostOnce).await?;
     client.subscribe("tele/+/+", QoS::AtMostOnce).await?;
     client.subscribe("rflink/msg", QoS::AtMostOnce).await?;
+    client.subscribe("rtl_433/#", QoS::AtMostOnce).await?;
     client.subscribe("+/water", QoS::AtMostOnce).await?;
     client.subscribe("+/gas_delivered", QoS::AtMostOnce).await?;
     client

src/topic.rs

@@ -15,6 +15,7 @@ pub enum Topic {
     Energy1(Device),
     Energy2(Device),
     DsmrPower(Device),
+    Rtl(Device, String),
 }
 
 impl Topic {
@@ -44,6 +45,7 @@ impl Topic {
             Topic::Energy1(device) => device,
             Topic::Energy2(device) => device,
             Topic::DsmrPower(device) => device,
+            Topic::Rtl(device, _) => device,
         }
     }
 }
@@ -56,6 +58,15 @@ impl From<&str> for Topic {
             };
             return Topic::Msg(device);
         }
+        if let Some((device, topic)) = raw
+            .strip_prefix("rtl_433/")
+            .and_then(|topic| topic.split_once('/'))
+        {
+            let device = Device {
+                hostname: device.to_string(),
+            };
+            return Topic::Rtl(device, topic.into());
+        }
         if let Some(name) = raw.strip_suffix("/water") {
             let device = Device {
                 hostname: name.to_string(),