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prometheus-esp8266-dht-exporter
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Add free heap to metrics

This commit is contained in:
SeanOMik 2023-07-23 23:45:41 -04:00
parent c34cd4d5cc
commit a60d99d331
Signed by: SeanOMik
GPG Key ID: 568F326C7EB33ACB
1 changed files with 12 additions and 4 deletions
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16
src/src.cpp
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@ -4,6 +4,7 @@
#include <DHT.h>
#include <DHT_U.h>
#include <Adafruit_SGP30.h>
#include <user_interface.h>
#include "config.h"
#include "version.h"
@ -181,14 +182,21 @@ void handle_http_root() {
void handle_http_metrics() {
log_request();
static size_t const BUFSIZE = 2000;
uint32_t free_heap = system_get_free_heap_size();
static char const *response_template =
"# HELP " PROM_NAMESPACE "_info Metadata about the device.\n"
"# TYPE " PROM_NAMESPACE "_info gauge\n"
"# UNIT " PROM_NAMESPACE "_info \n"
PROM_NAMESPACE "_info{version=\"%s\",board=\"%s\"} 1\n"
"# HELP " PROM_NAMESPACE "_info Metadata about a sensor.\n"
"# TYPE " PROM_NAMESPACE "_info gauge\n"
"# UNIT " PROM_NAMESPACE "_info \n"
"# HELP " PROM_NAMESPACE "_free_heap Free heap\n"
"# TYPE " PROM_NAMESPACE "_free_heap gauge\n"
"# UNIT " PROM_NAMESPACE "_free_heap byte\n"
PROM_NAMESPACE "_free_heap %d\n"
"# HELP " PROM_NAMESPACE "_sensor Metadata about a sensor.\n"
"# TYPE " PROM_NAMESPACE "_sensor gauge\n"
"# UNIT " PROM_NAMESPACE "_sensor \n"
PROM_NAMESPACE "_sensor{sensor=\"%s\",serial=\"%s\"} 1\n"
PROM_NAMESPACE "_sensor{sensor=\"%s\",serial=\"%s\"} 1\n"
"# HELP " PROM_NAMESPACE "_air_humidity_percent Air humidity.\n"
@ -227,7 +235,7 @@ void handle_http_metrics() {
}
char response[BUFSIZE];
snprintf(response, BUFSIZE, response_template, VERSION, BOARD_NAME, DHT_NAME, "n/a", "SGP30", sgp30_serial, humidity, temperature, heat_index, tvoc, co2, h2, ethanol);
snprintf(response, BUFSIZE, response_template, VERSION, BOARD_NAME, free_heap, DHT_NAME, "n/a", "SGP30", sgp30_serial, humidity, temperature, heat_index, tvoc, co2, h2, ethanol);
http_server.send(200, "text/plain; charset=utf-8", response);
}