docs: readme

readme.md

@@ -11,4 +11,16 @@ Build and run locally:
 ```bash
 cd test
 podman compose up --build
-```
+```
+
+## Frontend (Web)
+
+See: https://git.piskot.si/SeminarM2/lambdaiot-web
+
+## IoT firmware (Arduino ESP8266)
+
+See folder `esp-demo`.
+
+## IoT device emulator
+
+Run `test/device_emulator.py`