Meshtastic Onewire patch

onewire.patch

From 14f33b1ebb5a8eec392efd085c2ecf88766be616 Mon Sep 17 00:00:00 2001
From: Mia Metzler <[email protected]>
Date: Sun, 13 Apr 2025 13:38:10 +0200
Subject: [PATCH] Add onewire

---
 platformio.ini                                |  1 +
 .../Telemetry/EnvironmentTelemetry.cpp        | 14 +++++-
 .../Telemetry/Sensor/OnewireSensor.cpp        | 45 +++++++++++++++++++
 src/modules/Telemetry/Sensor/OnewireSensor.h  | 31 +++++++++++++
 4 files changed, 90 insertions(+), 1 deletion(-)
 create mode 100644 src/modules/Telemetry/Sensor/OnewireSensor.cpp
 create mode 100644 src/modules/Telemetry/Sensor/OnewireSensor.h

diff --git a/platformio.ini b/platformio.ini
index 1c51e53b..42c80f3e 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -128,6 +128,7 @@ lib_deps =
 	https://github.com/meshtastic/DFRobot_LarkWeatherStation#4de3a9cadef0f6a5220a8a906cf9775b02b0040d
 	https://github.com/DFRobot/DFRobot_RainfallSensor#38fea5e02b40a5430be6dab39a99a6f6347d667e
 	robtillaart/[email protected]
+	milesburton/DallasTemperature@^4.0.4
 
 	; Health Sensor Libraries
 	sparkfun/SparkFun MAX3010x Pulse and Proximity Sensor [email protected]
diff --git a/src/modules/Telemetry/EnvironmentTelemetry.cpp b/src/modules/Telemetry/EnvironmentTelemetry.cpp
index 6a5e8376..7e8f5033 100644
--- a/src/modules/Telemetry/EnvironmentTelemetry.cpp
+++ b/src/modules/Telemetry/EnvironmentTelemetry.cpp
@@ -40,7 +40,8 @@
 #include "Sensor/SHTC3Sensor.h"
 #include "Sensor/TSL2591Sensor.h"
 #include "Sensor/VEML7700Sensor.h"
-
+#include "Sensor/OnewireSensor.h"
+OnewireSensor oneWireSensor;
 BMP085Sensor bmp085Sensor;
 BMP280Sensor bmp280Sensor;
 BME280Sensor bme280Sensor;
@@ -115,6 +116,8 @@ int32_t EnvironmentTelemetryModule::runOnce()
 #ifdef T1000X_SENSOR_EN
             result = t1000xSensor.runOnce();
 #elif !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR_EXTERNAL
+            if (oneWireSensor.hasSensor()) //hasSensor doesnt work here, because it cant be found over i2c
+                result = oneWireSensor.runOnce();
             if (dfRobotLarkSensor.hasSensor())
                 result = dfRobotLarkSensor.runOnce();
             if (dfRobotGravitySensor.hasSensor())
@@ -458,6 +461,10 @@ bool EnvironmentTelemetryModule::getEnvironmentTelemetry(meshtastic_Telemetry *m
         valid = valid && nau7802Sensor.getMetrics(m);
         hasSensor = true;
     }
+    if (true) {
+        valid = valid && oneWireSensor.getMetrics(m);
+        hasSensor = true;
+    }
     if (aht10Sensor.hasSensor()) {
         if (!bmp280Sensor.hasSensor() && !bmp3xxSensor.hasSensor()) {
             valid = valid && aht10Sensor.getMetrics(m);
@@ -612,6 +619,11 @@ AdminMessageHandleResult EnvironmentTelemetryModule::handleAdminMessageForModule
         if (result != AdminMessageHandleResult::NOT_HANDLED)
             return result;
     }
+    if (oneWireSensor.hasSensor()) {
+        result = oneWireSensor.handleAdminMessage(mp, request, response);
+        if (result != AdminMessageHandleResult::NOT_HANDLED)
+            return result;
+    }
     if (bmp280Sensor.hasSensor()) {
         result = bmp280Sensor.handleAdminMessage(mp, request, response);
         if (result != AdminMessageHandleResult::NOT_HANDLED)
diff --git a/src/modules/Telemetry/Sensor/OnewireSensor.cpp b/src/modules/Telemetry/Sensor/OnewireSensor.cpp
new file mode 100644
index 00000000..47d88dfb
--- /dev/null
+++ b/src/modules/Telemetry/Sensor/OnewireSensor.cpp
@@ -0,0 +1,45 @@
+#include "configuration.h"
+
+#if !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR
+
+#include "../mesh/generated/meshtastic/telemetry.pb.h"
+#include "OnewireSensor.h"
+#include "TelemetrySensor.h"
+#include <Adafruit_BME280.h>
+#include <typeinfo>
+#include <OneWire.h>
+#include <DallasTemperature.h>
+
+OnewireSensor::OnewireSensor() : TelemetrySensor(meshtastic_TelemetrySensorType_CUSTOM_SENSOR, "ONEWIRE") {}
+   
+
+int32_t OnewireSensor::runOnce()
+{
+    LOG_INFO("Init sensor: %s", sensorName);
+    //status = true; //Sensor found mock
+    oneWire = OneWire(oneWireBus);
+    sensors = DallasTemperature(&oneWire);sensors.begin();
+    sensors.begin();
+    status = sensors.getDeviceCount() > 0;
+    LOG_INFO("Onewire sensor init status: %d", status);
+    return initI2CSensor();
+}
+
+bool OnewireSensor::hasSensor() {
+    return true;
+}
+void OnewireSensor::setup() {}
+
+bool OnewireSensor::getMetrics(meshtastic_Telemetry *measurement)
+{
+    measurement->variant.environment_metrics.has_temperature = true;
+
+    LOG_DEBUG("Onewire getMetrics");
+    //Code to take a measurement
+    sensors.requestTemperatures(); 
+    float temperatureC = sensors.getTempCByIndex(0);
+    measurement->variant.environment_metrics.temperature = temperatureC;
+
+    return true;
+}
+#endif
\ No newline at end of file
diff --git a/src/modules/Telemetry/Sensor/OnewireSensor.h b/src/modules/Telemetry/Sensor/OnewireSensor.h
new file mode 100644
index 00000000..84606d2f
--- /dev/null
+++ b/src/modules/Telemetry/Sensor/OnewireSensor.h
@@ -0,0 +1,31 @@
+#include "configuration.h"
+
+#if !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR
+
+#include "../mesh/generated/meshtastic/telemetry.pb.h"
+#include "TelemetrySensor.h"
+#include <Adafruit_BME280.h>
+#include <OneWire.h>
+#include <DallasTemperature.h>
+
+
+class OnewireSensor : public TelemetrySensor
+{
+  private:
+    Adafruit_BME280 bme280;
+    const int oneWireBus = 4; 
+    OneWire oneWire;
+    DallasTemperature sensors;
+
+  protected:
+      virtual void setup() override;
+
+
+  public:
+    OnewireSensor();
+    virtual int32_t runOnce() override;
+    virtual bool getMetrics(meshtastic_Telemetry *measurement) override;
+    bool hasSensor();
+};
+
+#endif
\ No newline at end of file
-- 
2.49.0