more documentation

README.md

@@ -24,6 +24,7 @@ NodeRed is running here: http://localhost:1880/
 ## Hardware
 
 ### Arduino IDE
+
 We are using HelTec Automation Wirelsess Sticks ESP32 Dev-Boards. Their GitHub repo can be found here: https://github.com/HelTecAutomation/Heltec_ESP32
 
 
@@ -31,6 +32,10 @@ I had to install VCP Drivers, first: https://www.silabs.com/developers/usb-to-ua
 
 You can add their Board Manager to the boards managers URLs: https://github.com/HelTecAutomation/Heltec_ESP32/blob/master/library.json and find their libraries in the IDE (Sketch -> Include Library -> Manage Libraries... Search for "heltec esp32").
 
+These boards are already *V3* boards, so be careful selecting the right board and port (VCP).
+
+![Arduino IDE](docs/images/flash-with-arduino.png "select the right board and port")
+
 
 ### Find the port 
 
@@ -40,5 +45,14 @@ Usually you can find the used port using `esptool.py`, but that's not working fo
 esptool.py write_flash_status --non-volatile 0
 ```
 
+#### Using MicroPython
+
+Download the firmware:
+
+Flash it using `esptool`: https://micropython.org/download/GENERIC_S3/
 
 
+```sh
+esptool.py --chip esp32s3  write_flash -z 0  ~/Desktop/GENERIC_S3-20220117-v1.18.bin
+```
+

software/container/conf/mosquitto.conf

@@ -0,0 +1,2 @@
+listener 1883
+allow_anonymous true