diff --git a/lora-asset-tracker-tx/README.md b/lora-asset-tracker-tx/README.md
new file mode 100644
index 0000000..f2f3969
--- /dev/null
+++ b/lora-asset-tracker-tx/README.md
@@ -0,0 +1,3 @@
+Before uploading "lora-asset-tracker-**tx**.ino" sketch file to your device, you should check following guide:
+
+**[lora-asset-tracker-tx](https://github.com/lightaprs/LightTracker-1.0/wiki/lora-asset-tracker-tx.ino-Guide)**