diff --git a/main.cpp b/main.cpp
index 088d48d..5b999f3 100644
--- a/main.cpp
+++ b/main.cpp
@@ -8,11 +8,11 @@
 #include "main.hpp"
 #include "AutomForArduino.cpp"
 
+#include <prometheus/exposer.h>
+#include <prometheus/registry.h>
 #include <prometheus/counter.h>
 #include <prometheus/gauge.h>
 #include <prometheus/histogram.h>
-#include <prometheus/registry.h>
-#include <prometheus/exposer.h>
 
 #include <curl/curl.h>
 #include <string>
@@ -50,6 +50,29 @@ unsigned short sensor_max, sensor_high, sensor_low, sensor_min;
 
 float TankInitalValue = 5;
 
+using namespace prometheus;
+std::shared_ptr<Registry> registry;
+Gauge* debit_entree = nullptr;
+Gauge* debit_sortie = nullptr;
+
+Gauge* debit_p1 = nullptr;
+Gauge* debit_p2 = nullptr;
+Gauge* debit_p3 = nullptr;
+Gauge* debit_p4 = nullptr;
+
+Gauge* tank_level = nullptr;
+
+Counter* volume_p1 = nullptr;
+Counter* volume_p2 = nullptr;
+Counter* volume_p3 = nullptr;
+Counter* volume_p4 = nullptr;
+
+Histogram::BucketBoundaries buckets = {
+  1, 2, 3, 4, 5, 6, 7, 8, 9
+};
+
+Histogram *tank_level_hist = nullptr;
+
 // Réception des messages MQTT
 // ************************************************************
 class callback : public virtual mqtt::callback {
@@ -398,13 +421,66 @@ double SimulConsoBrown(double valeur_precedente)
  */
 void InitPrometheus()
 {
+  static Exposer exposer{"0.0.0.0:8099"};
 
+  // Le registre central
+  registry = std::make_shared<Registry>();
 
+  exposer.RegisterCollectable(registry);
+
+  auto& level_family = BuildGauge()
+        .Name("geii_level")
+        .Help("Volume en m3")
+        .Register(*registry);
+
+  tank_level = &level_family.Add({});
+
+  auto& debit_family = BuildGauge()
+        .Name("geii_debit")
+        .Help("Débit en l/s")
+        .Register(*registry);
+
+  debit_entree = &debit_family.Add({{"numero", "entree"}});
+  debit_sortie = &debit_family.Add({{"numero", "sortie"}});
+  debit_p1 = &debit_family.Add({{"numero", "1"}});
+  debit_p2 = &debit_family.Add({{"numero", "2"}});
+  debit_p3 = &debit_family.Add({{"numero", "3"}});
+  debit_p4 = &debit_family.Add({{"numero", "4"}});
+
+  auto& volume_family = BuildCounter()
+        .Name("geii_volume")
+        .Help("Volume en l")
+        .Register(*registry);
+
+  volume_p1 = &volume_family.Add({{"numero", "1"}});
+  volume_p2 = &volume_family.Add({{"numero", "2"}});
+  volume_p3 = &volume_family.Add({{"numero", "3"}});
+  volume_p4 = &volume_family.Add({{"numero", "4"}});
+
+  auto& hist_family = BuildHistogram()
+        .Name("geii_hist")
+        .Help("histogramme du reservoir en m3")
+        .Register(*registry);
+
+  tank_level_hist = &hist_family.Add({}, buckets);
 }
 
 void ProcessPrometheus()
 {
+  debit_entree->Set(_digital[IN_FLOW_OUT].dvalue);
+  debit_sortie->Set(_digital[IN_FLOW_IN].dvalue);
+  debit_p1->Set(_digital[IN_FLOW_1].dvalue);
+  debit_p2->Set(_digital[IN_FLOW_2].dvalue);
+  debit_p3->Set(_digital[IN_FLOW_3].dvalue);
+  debit_p4->Set(_digital[IN_FLOW_4].dvalue);
 
+  volume_p1->Increment(_digital[IN_FLOW_1].dvalue * dt);
+  volume_p2->Increment(_digital[IN_FLOW_2].dvalue * dt);
+  volume_p3->Increment(_digital[IN_FLOW_3].dvalue * dt);
+  volume_p4->Increment(_digital[IN_FLOW_4].dvalue * dt);
+
+  tank_level->Set(_digital[IN_TANK_LEVEL].dvalue);
+  tank_level_hist->Observe(_digital[IN_TANK_LEVEL].dvalue);
 }
 
 void ProcessMQTT(mqtt::async_client* client)