diff --git a/README.md b/README.md
index 0d930be..8a5c5a4 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,10 @@ The following config should be enabled on arduino to compile and upload the code
 
 ![Arduino configuration](/arduino_config.png)
 
+If the device is not recognized, the following commands could help
+- 'sudo modprobe cdc_acm'
+- 'sudo chmod a+rw /dev/ttyACM0'
+
 ## Zigbee2MQTT
 
 - Add manually the device to zigbee by adding the following to the devices.yaml file (usually found in opt/zigbee2mqtt/data, if not present, create it). Dont forget to change the device_id with yours :