diff --git a/custom_components/pstryk/const.py b/custom_components/pstryk/const.py
index 375fddf..3e456dd 100644
--- a/custom_components/pstryk/const.py
+++ b/custom_components/pstryk/const.py
@@ -17,3 +17,14 @@ DEFAULT_MQTT_TOPIC_SELL = "energy/forecast/sell"
 CONF_MQTT_ENABLED = "mqtt_enabled"
 CONF_MQTT_TOPIC_BUY = "mqtt_topic_buy"
 CONF_MQTT_TOPIC_SELL = "mqtt_topic_sell"
+CONF_MQTT_48H_MODE = "mqtt_48h_mode"
+
+# Retry mechanism constants
+CONF_RETRY_ATTEMPTS = "retry_attempts"
+CONF_RETRY_DELAY = "retry_delay"
+DEFAULT_RETRY_ATTEMPTS = 3
+DEFAULT_RETRY_DELAY = 20  # seconds
+MIN_RETRY_ATTEMPTS = 1
+MAX_RETRY_ATTEMPTS = 10
+MIN_RETRY_DELAY = 5  # seconds
+MAX_RETRY_DELAY = 300  # seconds (5 minutes)