diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..726443c
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "lib/eplot"]
+	path = lib/eplot
+	url = https://github.com/chriswolfvision/eplot
diff --git a/lib/eplot b/lib/eplot
new file mode 160000
index 0000000..aa4d607
--- /dev/null
+++ b/lib/eplot
@@ -0,0 +1 @@
+Subproject commit aa4d607f050284c803583ba78852c845f749d67d
diff --git a/package.json b/package.json
index d83f768..e76b6ca 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,7 @@
 {
   "dependencies": {
     "bootstrap": "^4.4.1",
-    "chart.js": "^2.9.3"
+    "chart.js": "^2.9.3",
+    "ervy": "^1.0.7"
   }
 }
diff --git a/src/Command/ChartHygrometryCommand.php b/src/Command/ChartHygrometryCommand.php
new file mode 100644
index 0000000..ab50afb
--- /dev/null
+++ b/src/Command/ChartHygrometryCommand.php
@@ -0,0 +1,92 @@
+<?php
+
+namespace App\Command;
+
+use App\Repository\HygrometryRepository;
+use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
+use Symfony\Component\Console\Helper\Table;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+use Symfony\Component\HttpKernel\KernelInterface;
+use Symfony\Component\Process\Process;
+
+class ChartHygrometryCommand extends ContainerAwareCommand
+{
+    protected static $defaultName = 'app:chart:hygrometry';
+    protected HygrometryRepository $repository;
+    protected KernelInterface $kernel;
+    protected ParameterBagInterface $params;
+
+    public function __construct(HygrometryRepository $repository, KernelInterface $kernel, ParameterBagInterface $params)
+    {
+        $this->repository = $repository;
+        $this->kernel = $kernel;
+        $this->params = $params;
+
+        parent::__construct();
+    }
+
+    protected function configure()
+    {
+        $this
+            ->setDescription('Show a chart of hygrometry')
+        ;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        chdir($this->getContainer()->get('kernel')->getProjectDir());
+
+        $entities = $this->repository->findByDateRange(
+            new \DateTime('now - 1 day'),
+            new \DateTime('now'),
+            42,
+            'DESC'
+        );
+
+        $entities = array_reverse($entities);
+        $table = new Table($output);
+        $table->setHeaders(['ID', 'Date', 'Value']);
+
+        $max = (int) $this->params->get('hygrometry_trigger_max');
+
+        $stats = ['Value,Max'];
+
+        foreach ($entities as $i => $entity) {
+            $stats1[] = $entity->getvalue();
+            $stats2[] = $max;
+
+            $table->addRow([
+                $i,
+                $entity->getDate()->format('d/m/Y H:i'),
+                $entity->getValue().'%',
+            ]);
+        }
+
+        $filename1 = tempnam('./', self::$defaultName);
+        $filename2 = tempnam('./', self::$defaultName);
+
+        file_put_contents($filename1, implode("\n", $stats1));
+        file_put_contents($filename2, implode("\n", $stats2));
+
+        $process = new Process([
+            './lib/eplot/eplot',
+            '-d',
+            '-t',
+            'Max@Hygrometry',
+            '-m',
+            $filename2,
+            $filename1,
+        ]);
+
+        $process->run();
+        $output->writeln($process->getOutput());
+        $table->render();
+
+        unlink($filename1);
+        unlink($filename2);
+
+        return 0;
+    }
+}
diff --git a/src/Command/ChartTemperatureCommand.php b/src/Command/ChartTemperatureCommand.php
new file mode 100644
index 0000000..a834270
--- /dev/null
+++ b/src/Command/ChartTemperatureCommand.php
@@ -0,0 +1,103 @@
+<?php
+
+namespace App\Command;
+
+use App\Repository\TemperatureRepository;
+use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
+use Symfony\Component\Console\Helper\Table;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+use Symfony\Component\HttpKernel\KernelInterface;
+use Symfony\Component\Process\Process;
+
+class ChartTemperatureCommand extends ContainerAwareCommand
+{
+    protected static $defaultName = 'app:chart:temperature';
+    protected TemperatureRepository $repository;
+    protected KernelInterface $kernel;
+    protected ParameterBagInterface $params;
+
+    public function __construct(TemperatureRepository $repository, KernelInterface $kernel, ParameterBagInterface $params)
+    {
+        $this->repository = $repository;
+        $this->kernel = $kernel;
+        $this->params = $params;
+
+        parent::__construct();
+    }
+
+    protected function configure()
+    {
+        $this
+            ->setDescription('Show a chart of temperature')
+        ;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        chdir($this->getContainer()->get('kernel')->getProjectDir());
+
+        $entities = $this->repository->findByDateRange(
+            new \DateTime('now - 1 day'),
+            new \DateTime('now'),
+            42,
+            'DESC'
+        );
+
+        $entities = array_reverse($entities);
+        $table = new Table($output);
+        $table->setHeaders(['ID', 'Date', 'Value']);
+
+        $perfect = (int) $this->params->get('temperature_trigger_max');
+        $min = (int) $this->params->get('temperature_trigger_min');
+
+        $stats = ['Value,Perfect,Min'];
+
+        foreach ($entities as $i => $entity) {
+            $stats1[] = $entity->getvalue();
+            $stats2[] = (float) 27;
+            $stats3[] = (float) $min;
+
+            $table->addRow([
+                $i,
+                $entity->getDate()->format('d/m/Y H:i'),
+                $entity->getValue().'°',
+            ]);
+        }
+
+        $filename1 = tempnam('./', self::$defaultName);
+        $filename2 = tempnam('./', self::$defaultName);
+        $filename3 = tempnam('./', self::$defaultName);
+
+        file_put_contents($filename1, implode("\n", $stats1));
+        file_put_contents($filename2, implode("\n", $stats2));
+        file_put_contents($filename3, implode("\n", $stats3));
+
+        $process = new Process([
+            './lib/eplot/eplot',
+            '-d',
+            '-r',
+            '[0:45][10:35]',
+            '-t',
+            'Perfect@Min@Temperature',
+            '-m',
+            basename($filename2),
+            basename($filename3),
+            basename($filename1),
+        ]);
+
+        $process->run();
+
+        $graph = $process->getOutput();
+        $output->writeln($graph);
+
+        $table->render();
+
+        unlink($filename1);
+        unlink($filename2);
+        unlink($filename3);
+
+        return 0;
+    }
+}
diff --git a/yarn.lock b/yarn.lock
index a534708..8e383b1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,10 +2,10 @@
 # yarn lockfile v1
 
 
-bulma@^0.8.0:
-  version "0.8.0"
-  resolved "https://registry.yarnpkg.com/bulma/-/bulma-0.8.0.tgz#ac1606431703a4761b18a4a2d5cc1fa864a2aece"
-  integrity sha512-nhf3rGyiZh/VM7FrSJ/5KeLlfaFkXz0nYcXriynfPH4vVpnxnqyEwaNGdNCVzHyyCA3cHgkQAMpdF/SFbFGZfA==
+bootstrap@^4.4.1:
+  version "4.5.3"
+  resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-4.5.3.tgz#c6a72b355aaf323920be800246a6e4ef30997fe6"
+  integrity sha512-o9ppKQioXGqhw8Z7mah6KdTYpNQY//tipnkxppWhPbiSWdD+1raYsnhwEZjkTHYbGee4cVQ0Rx65EhOY/HNLcQ==
 
 chart.js@^2.9.3:
   version "2.9.3"
@@ -47,6 +47,11 @@ color-name@^1.0.0:
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.4.tgz#c2a09a87acbde69543de6f63fa3995c826c536a2"
   integrity sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==
 
+ervy@^1.0.7:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/ervy/-/ervy-1.0.7.tgz#b4167707ef178484c7b84d7d6e8cca727cf7f252"
+  integrity sha512-LyHLPwIKxCKKtTO/qBMFzwA1BD5IjpM0AA3k6CeK9hrEn4Kbayi93G9eD/Ko4suEIjerSl7YpMmaOoL0g9OCoQ==
+
 moment@^2.10.2:
   version "2.24.0"
   resolved "https://registry.yarnpkg.com/moment/-/moment-2.24.0.tgz#0d055d53f5052aa653c9f6eb68bb5d12bf5c2b5b"