Tasmota/tasmota/xsns_91_prometheus.ino

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/*
xsns_91_prometheus.ino - Web based information for Tasmota
Copyright (C) 2020 Theo Arends
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
//#define USE_PROMETHEUS // Enable retrieval of metrics
#ifdef USE_PROMETHEUS
/*********************************************************************************************\
* Prometheus support
\*********************************************************************************************/
#define XSNS_91 91
void HandleMetrics(void)
{
if (!HttpCheckPriviledgedAccess()) { return; }
AddLog_P(LOG_LEVEL_DEBUG, S_LOG_HTTP, PSTR("Prometheus"));
WSContentBegin(200, CT_PLAIN);
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char parameter[FLOATSZ];
if (!isnan(global_temperature)) {
dtostrfd(global_temperature, Settings.flag2.temperature_resolution, parameter);
WSContentSend_P(PSTR("# TYPE global_temperature gauge\nglobal_temperature %s\n"), parameter);
}
if (global_humidity != 0) {
dtostrfd(global_humidity, Settings.flag2.humidity_resolution, parameter);
WSContentSend_P(PSTR("# TYPE global_humidity gauge\nglobal_humidity %s\n"), parameter);
}
if (global_pressure != 0) {
dtostrfd(global_pressure, Settings.flag2.pressure_resolution, parameter);
WSContentSend_P(PSTR("# TYPE global_pressure gauge\nglobal_pressure %s\n"), parameter);
}
#ifdef USE_ENERGY_SENSOR
dtostrfd(Energy.voltage[0], Settings.flag2.voltage_resolution, parameter);
WSContentSend_P(PSTR("# TYPE voltage gauge\nvoltage %s\n"), parameter);
dtostrfd(Energy.current[0], Settings.flag2.current_resolution, parameter);
WSContentSend_P(PSTR("# TYPE current gauge\ncurrent %s\n"), parameter);
dtostrfd(Energy.active_power[0], Settings.flag2.wattage_resolution, parameter);
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WSContentSend_P(PSTR("# TYPE active_power gauge\nactive_power %s\n"), parameter);
dtostrfd(Energy.daily, Settings.flag2.energy_resolution, parameter);
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WSContentSend_P(PSTR("# TYPE energy_daily gauge\nenergy_daily %s\n"), parameter);
dtostrfd(Energy.total, Settings.flag2.energy_resolution, parameter);
WSContentSend_P(PSTR("# TYPE energy_total counter\nenergy_total %s\n"), parameter);
#endif
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/*
// Alternative method using the complete sensor JSON data
// For prometheus it may need to be decoded to # TYPE messages
mqtt_data[0] = '\0';
MqttShowSensor();
char json[strlen(mqtt_data) +1];
snprintf_P(json, sizeof(json), mqtt_data);
// Do your Prometheus specific processing here.
// Look at function DisplayAnalyzeJson() in file xdrv_13_display.ino as an example how to decode the JSON message
WSContentSend_P(json);
*/
WSContentEnd();
}
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
bool Xsns91(uint8_t function)
{
bool result = false;
switch (function) {
case FUNC_WEB_ADD_HANDLER:
Webserver->on("/metrics", HandleMetrics);
break;
}
return result;
}
#endif // USE_PROMETHEUS