diff --git a/app.py b/app.py
index d9a6a97..7f1ae92 100644
--- a/app.py
+++ b/app.py
@@ -88,6 +88,12 @@ def recipe():
 def handle_new_client():
     updateState()
 
+@socketio.on('eval scheme')
+def eval_scheme(code):
+    output = phasectrl.safe_eval(code, statemachine.env)
+    phasectrl.safe_eval(f'(notify "{output}")', statemachine.env)
+    socketio.emit('eval output', output)
+
 @socketio.on('get sensors history')
 def send_sensors_history(elements=1000):
     socketio.emit('sensor history', sensors.get_history(elements))