Async temperature usermod (#1178)
* Change Temperature usermod to use async reading to avoid blocking * Fix comparison on wait time * Add * Simplify logic in the loop method * Optimize calls to minimize latency, inform user how long till first measurement * disable usermod if sensor not found * Added debug statements on init, update readme * fix spelling error of celsius
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usermods/Temperature/platformio_override.ini
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usermods/Temperature/platformio_override.ini
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; Options
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; -------
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; USERMOD_DALLASTEMPERATURE - define this to have this user mod included wled00\usermods_list.cpp
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; USERMOD_DALLASTEMPERATURE_CELSIUS - define this to report temperatures in degrees celsius, otherwise fahrenheit will be reported
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; USERMOD_DALLASTEMPERATURE_MEASUREMENT_INTERVAL - the number of milliseconds between measurements, defaults to 60 seconds
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; USERMOD_DALLASTEMPERATURE_FIRST_MEASUREMENT_AT - the number of milliseconds after boot to take first measurement, defaults to 20 seconds
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;
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[env:d1_mini_usermod_dallas_temperature_C]
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extends = env:d1_mini
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build_flags = ${common.build_flags_esp8266} -D USERMOD_DALLASTEMPERATURE -D USERMOD_DALLASTEMPERATURE_CELSIUS
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lib_deps = ${env.lib_deps}
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milesburton/DallasTemperature@^3.9.0
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OneWire@~2.3.5
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@ -5,11 +5,18 @@ This usermod will read from an attached DS18B20 temperature sensor (as available
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The temperature is displayed both in the Info section of the web UI as well as published to the `/temperature` MQTT topic if enabled.
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The temperature is displayed both in the Info section of the web UI as well as published to the `/temperature` MQTT topic if enabled.
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This usermod will be expanded with support for different sensor types in the future.
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This usermod will be expanded with support for different sensor types in the future.
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If temperature sensor is not detected during boot, this usermod will be disabled.
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## Installation
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## Installation
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Copy `usermod_temperature.h` to the wled00 directory.
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Copy the example `platformio_override.ini` to the root directory. This file should be placed in the same directory as `platformio.ini`.
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Uncomment the corresponding lines in `usermods_list.cpp` and compile!
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If this is the only v2 usermod you plan to use, you can alternatively replace `usermods_list.h` in wled00 with the one in this folder.
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### Define Your Options
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* `USERMOD_DALLASTEMPERATURE` - define this to have this user mod included wled00\usermods_list.cpp
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* `USERMOD_DALLASTEMPERATURE_CELSIUS` - define this to report temperatures in degrees celsious, otherwise fahrenheit will be reported
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* `USERMOD_DALLASTEMPERATURE_MEASUREMENT_INTERVAL` - the number of milliseconds between measurements, defaults to 60 seconds
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* `USERMOD_DALLASTEMPERATURE_FIRST_MEASUREMENT_AT` - the number of milliseconds after boot to take first measurement, defaults to 20 seconds
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## Project link
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## Project link
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@ -17,7 +24,10 @@ If this is the only v2 usermod you plan to use, you can alternatively replace `u
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### PlatformIO requirements
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### PlatformIO requirements
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You might have to uncomment `DallasTemperature@~3.8.0`,`OneWire@~2.3.5 under` `[common]` section in `platformio.ini`:
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If you are using `platformio_override.ini`, you should be able to refresh the task list and see your custom task, for example `env:d1_mini_usermod_dallas_temperature_C`.
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If you are not using `platformio_override.ini`, you might have to uncomment `DallasTemperature@~3.8.0`,`OneWire@~2.3.5 under` `[common]` section in `platformio.ini`:
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```ini
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```ini
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# platformio.ini
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# platformio.ini
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@ -38,3 +48,11 @@ lib_deps_external =
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OneWire@~2.3.5
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OneWire@~2.3.5
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...
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...
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```
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```
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## Change Log
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2020-09-12
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* Changed to use async, non-blocking implementation
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* Do not report low temperatures that indicate an error to mqtt
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* Disable plugin if temperature sensor not detected
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* Report the number of seconds until the first read in the info screen instead of sensor error
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@ -11,61 +11,156 @@
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#define TEMPERATURE_PIN 14
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#define TEMPERATURE_PIN 14
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#endif
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#endif
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#define TEMP_CELSIUS // Comment out for Fahrenheit
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// the frequency to check temperature, 1 minute
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#ifndef USERMOD_DALLASTEMPERATURE_MEASUREMENT_INTERVAL
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#define USERMOD_DALLASTEMPERATURE_MEASUREMENT_INTERVAL 60000
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#endif
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#define MEASUREMENT_INTERVAL 60000 //1 Minute
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// how many seconds after boot to take first measurement, 20 seconds
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#ifndef USERMOD_DALLASTEMPERATURE_FIRST_MEASUREMENT_AT
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#define USERMOD_DALLASTEMPERATURE_FIRST_MEASUREMENT_AT 20000
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#endif
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OneWire oneWire(TEMPERATURE_PIN);
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OneWire oneWire(TEMPERATURE_PIN);
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DallasTemperature sensor(&oneWire);
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DallasTemperature sensor(&oneWire);
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class UsermodTemperature : public Usermod {
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class UsermodTemperature : public Usermod {
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private:
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private:
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// The device's unique 64-bit serial code stored in on-board ROM.
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// Reading directly from the sensor device address is faster than
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// reading from index. When reading by index, DallasTemperature
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// must first look up the device address at the specified index.
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DeviceAddress sensorDeviceAddress;
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// set last reading as "40 sec before boot", so first reading is taken after 20 sec
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// set last reading as "40 sec before boot", so first reading is taken after 20 sec
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unsigned long lastMeasurement = UINT32_MAX - 40000;
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unsigned long lastMeasurement = UINT32_MAX - (USERMOD_DALLASTEMPERATURE_MEASUREMENT_INTERVAL - USERMOD_DALLASTEMPERATURE_FIRST_MEASUREMENT_AT);
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float temperature = 0.0f;
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// last time requestTemperatures was called
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public:
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// used to determine when we can read the sensors temperature
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void getReading() {
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// we have to wait at least 93.75 ms after requestTemperatures() is called
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unsigned long lastTemperaturesRequest;
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float temperature = -100; // default to -100, DS18B20 only goes down to -50C
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// indicates requestTemperatures has been called but the sensor measurement is not complete
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bool waitingForConversion = false;
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// flag to indicate we have finished the first getTemperature call
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// allows this library to report to the user how long until the first
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// measurement
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bool getTemperatureComplete = false;
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// flag set at startup if DS18B20 sensor not found, avoids trying to keep getting
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// temperature if flashed to a board without a sensor attached
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bool disabled = false;
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void requestTemperatures() {
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// there is requestTemperaturesByAddress however it
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// appears to do more work,
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// TODO: measure exection time difference
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sensor.requestTemperatures();
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sensor.requestTemperatures();
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#ifdef TEMP_CELSIUS
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lastTemperaturesRequest = millis();
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temperature = sensor.getTempCByIndex(0);
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waitingForConversion = true;
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#else
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temperature = sensor.getTempFByIndex(0);
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#endif
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}
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}
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void getTemperature() {
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#ifdef USERMOD_DALLASTEMPERATURE_CELSIUS
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temperature = sensor.getTempC(sensorDeviceAddress);
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#else
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temperature = sensor.getTempF(sensorDeviceAddress);
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#endif
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lastMeasurement = millis();
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waitingForConversion = false;
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getTemperatureComplete = true;
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}
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public:
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void setup() {
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void setup() {
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sensor.begin();
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sensor.begin();
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sensor.setResolution(9);
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// get the unique 64-bit serial code stored in on-board ROM
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// if getAddress returns false, the sensor was not found
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disabled = !sensor.getAddress(sensorDeviceAddress, 0);
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if (!disabled) {
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DEBUG_PRINTLN("Dallas Temperature found");
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// set the resolution for this specific device
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sensor.setResolution(sensorDeviceAddress, 9, true);
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// do not block waiting for reading
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sensor.setWaitForConversion(false);
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} else {
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DEBUG_PRINTLN("Dallas Temperature not found");
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}
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}
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}
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void loop() {
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void loop() {
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if (millis() - lastMeasurement > MEASUREMENT_INTERVAL)
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if (disabled) {
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return;
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}
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unsigned long now = millis();
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// check to see if we are due for taking a measurement
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// lastMeasurement will not be updated until the conversion
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// is complete the the reading is finished
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if (now - lastMeasurement < USERMOD_DALLASTEMPERATURE_MEASUREMENT_INTERVAL)
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{
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{
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getReading();
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return;
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}
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// we are due for a measurement, if we are not already waiting
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// for a conversion to complete, then make a new request for temps
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if (!waitingForConversion)
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{
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requestTemperatures();
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return;
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}
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// we were waiting for a conversion to complete, have we waited log enough?
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if (now - lastTemperaturesRequest >= 94 /* 93.75ms per the datasheet */)
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{
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getTemperature();
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if (WLED_MQTT_CONNECTED) {
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if (WLED_MQTT_CONNECTED) {
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char subuf[38];
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char subuf[38];
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strcpy(subuf, mqttDeviceTopic);
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strcpy(subuf, mqttDeviceTopic);
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if (-100 <= temperature) {
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// dont publish super low temperature as the graph will get messed up
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// the DallasTemperature library returns -127C or -196.6F when problem
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// reading the sensor
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strcat(subuf, "/temperature");
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strcat(subuf, "/temperature");
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mqtt->publish(subuf, 0, true, String(temperature).c_str());
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mqtt->publish(subuf, 0, true, String(temperature).c_str());
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} else {
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// publish something else to indicate status?
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}
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}
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}
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lastMeasurement = millis();
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}
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}
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}
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}
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void addToJsonInfo(JsonObject& root) {
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void addToJsonInfo(JsonObject& root) {
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// dont add temperature to info if we are disabled
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if (disabled) {
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return;
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}
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JsonObject user = root["u"];
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JsonObject user = root["u"];
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if (user.isNull()) user = root.createNestedObject("u");
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if (user.isNull()) user = root.createNestedObject("u");
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JsonArray temp = user.createNestedArray("Temperature");
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JsonArray temp = user.createNestedArray("Temperature");
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if (temperature == DEVICE_DISCONNECTED_C) {
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if (!getTemperatureComplete) {
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// if we haven't read the sensor yet, let the user know
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// that we are still waiting for the first measurement
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temp.add((USERMOD_DALLASTEMPERATURE_FIRST_MEASUREMENT_AT - millis()) / 1000);
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temp.add(" sec until read");
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return;
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}
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if (temperature <= -100) {
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temp.add(0);
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temp.add(0);
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temp.add(" Sensor Error!");
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temp.add(" Sensor Error!");
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return;
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return;
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}
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}
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temp.add(temperature);
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temp.add(temperature);
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#ifdef TEMP_CELSIUS
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#ifdef USERMOD_DALLASTEMPERATURE_CELSIUS
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temp.add("°C");
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temp.add("°C");
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#else
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#else
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temp.add("°F");
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temp.add("°F");
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@ -9,7 +9,10 @@
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* \/ \/ \/
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* \/ \/ \/
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*/
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*/
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//#include "usermod_v2_example.h"
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//#include "usermod_v2_example.h"
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#include "usermod_temperature.h"
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#ifdef USERMOD_DALLASTEMPERATURE
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#include "../usermods/Temperature/usermod_temperature.h"
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#endif
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//#include "usermod_v2_empty.h"
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//#include "usermod_v2_empty.h"
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void registerUsermods()
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void registerUsermods()
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@ -20,6 +23,9 @@ void registerUsermods()
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* \/ \/ \/
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* \/ \/ \/
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*/
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*/
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//usermods.add(new MyExampleUsermod());
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//usermods.add(new MyExampleUsermod());
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#ifdef USERMOD_DALLASTEMPERATURE
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usermods.add(new UsermodTemperature());
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usermods.add(new UsermodTemperature());
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#endif
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//usermods.add(new UsermodRenameMe());
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//usermods.add(new UsermodRenameMe());
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}
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}
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* \/ \/ \/
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* \/ \/ \/
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*/
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*/
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//#include "usermod_v2_example.h"
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//#include "usermod_v2_example.h"
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//#include "usermod_temperature.h"
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#ifdef USERMOD_DALLASTEMPERATURE
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#include "../usermods/Temperature/usermod_temperature.h"
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#endif
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//#include "usermod_v2_empty.h"
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//#include "usermod_v2_empty.h"
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void registerUsermods()
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void registerUsermods()
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* \/ \/ \/
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* \/ \/ \/
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*/
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*/
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//usermods.add(new MyExampleUsermod());
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//usermods.add(new MyExampleUsermod());
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//usermods.add(new UsermodTemperature());
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#ifdef USERMOD_DALLASTEMPERATURE
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usermods.add(new UsermodTemperature());
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#endif
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//usermods.add(new UsermodRenameMe());
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//usermods.add(new UsermodRenameMe());
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}
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}
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