From a60d99d331ad9d2ecfc5fe41287332103701dce0 Mon Sep 17 00:00:00 2001 From: SeanOMik Date: Sun, 23 Jul 2023 23:45:41 -0400 Subject: [PATCH] Add free heap to metrics --- src/src.cpp | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/src/src.cpp b/src/src.cpp index c385a62..a0ae035 100644 --- a/src/src.cpp +++ b/src/src.cpp @@ -4,6 +4,7 @@ #include #include #include +#include #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); }