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add prometheus metrics for analog/scheduler/custom #2962

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This commit is contained in:
MichaelDvP
2026-02-16 15:56:23 +01:00
parent ced7051ce7
commit 4326fb931b
8 changed files with 136 additions and 17 deletions
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38
src/core/analogsensor.cpp
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@@ -852,6 +852,15 @@ bool AnalogSensor::get_value_info(JsonObject output, const char * cmd, const int
return true;
}
if (!strcmp(cmd, F_(metrics))) {
std::string metrics = get_metrics_prometheus();
if (!metrics.empty()) {
output["api_data"] = metrics;
return true;
}
return false;
}
// this is for a specific sensor, return the value
const char * attribute_s = Command::get_attribute(cmd);
@@ -866,6 +875,35 @@ bool AnalogSensor::get_value_info(JsonObject output, const char * cmd, const int
return false; // not found
}
// generate Prometheus metrics format from analog values
std::string AnalogSensor::get_metrics_prometheus() {
std::string result;
result.reserve(sensors_.size() * 140);
char val[10];
for (auto & sensor : sensors_) {
result += (std::string) "# HELP emsesp_" + sensor.name() + " " + sensor.name();
if (sensor.type() != AnalogType::DIGITAL_OUT && sensor.type() != AnalogType::DIGITAL_IN) {
result += (std::string) ", " + EMSdevice::uom_to_string(sensor.uom());
} else {
result += (std::string) ", boolean";
}
result += (std::string) ", readable, visible";
if (sensor.type() == AnalogType::COUNTER || sensor.type() == AnalogType::RGB || sensor.type() == AnalogType::PULSE
|| (sensor.type() >= AnalogType::DIGITAL_OUT && sensor.type() <= AnalogType::PWM_2)
|| (sensor.type() >= AnalogType::CNT_0 && sensor.type() <= AnalogType::CNT_2)) {
result += (std::string) ", writable";
}
result += (std::string) "\n# TYPE emsesp_" + sensor.name() + " gauge\n";
result += (std::string) "emsesp_" + sensor.name() + " ";
if (sensor.type() != AnalogType::DIGITAL_OUT && sensor.type() != AnalogType::DIGITAL_IN) {
result += (std::string) Helpers::render_value(val, sensor.value(), 2) + "\n";
} else {
result += (std::string) (sensor.value() == 0 ? "0\n" : "1\n");
}
}
return result;
}
// note we don't add the device and state classes here, as we do in the custom entity service
void AnalogSensor::get_value_json(JsonObject output, const Sensor & sensor) {
output["name"] = (const char *)sensor.name();

1
src/core/analogsensor.h
View File

@@ -177,6 +177,7 @@ class AnalogSensor {
bool update(uint8_t gpio, const char * name, double offset, double factor, uint8_t uom, int8_t type, bool deleted, bool is_system);
bool get_value_info(JsonObject output, const char * cmd, const int8_t id = -1);
void store_counters();
std::string get_metrics_prometheus();
static std::vector<uint8_t> exclude_types() {
return exclude_types_;
}