Adding Sensors

All sensors implement SensorBase. Adding a new one takes three files: a header, an implementation, and wiring it into main.cpp.

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1. Header (include/sensors/MySensor.h)

#pragma once
#include "sensors/SensorBase.h"

class MySensor : public SensorBase {
public:
    bool begin() override;
    void update() override;
    std::string getName() const override { return "mysensor"; }
    std::string toJson() const override;

private:
    float _value = 0.0f;
};

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2. Implementation (src/sensors/MySensor.cpp)

#include "sensors/MySensor.h"

bool MySensor::begin() {
    // initialise hardware, return false on failure
    return true;
}

void MySensor::update() {
    // read hardware into _value
}

std::string MySensor::toJson() const {
    char buf[64];
    snprintf(buf, sizeof(buf), R"({"value":%.4f})", _value);
    return buf;
}

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3. Wire into main.cpp

#include "sensors/MySensor.h"

MySensor mySensor;

void setup() {
    if (!mySensor.begin()) {
        Logger::error("MySensor init failed");
    }
}

void loop() {
    mySensor.update();
}

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SensorBase Interface

Method	Required	Description
begin()	Yes	Init hardware, return false on failure
update()	Yes	Poll hardware, store latest reading
getName()	Yes	Key name used in JSON output
toJson()	Yes	Serialise current reading to JSON string

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Adding to WebSocket Broadcast

Include your sensor's JSON in the broadcast payload in WebServer.cpp alongside the existing sensors.