updated readme

README.md

@@ -201,3 +201,10 @@ It was tested on Venus OS Large `v2.92` on the following devices:
 ![Grid power L1, L2, L3 - device list - mqtt grid 2](/screenshots/grid_power_L3_L2_L1_device-list_mqtt-grid-2.png)
 
 </details>
+
+
+## Supporting/Sponsoring this project
+
+You like the project and you want to support me?
+
+[<img src="https://github.md0.eu/uploads/donate-button.svg" height="50">](https://www.paypal.com/donate/?hosted_button_id=3NEVZBDM5KABW)