We all know the stories of spies placing letters in hidden dead letter boxes during foggy cold november nights to communicate with other spies. Since the year is 2022 now, we will build something like this, but using a RaspberryPi Pico W 2. Basically the Raspberry Pi will act as a WiFi Accesspoint, which you can connect to without the actual need of physical contact with the device. The Raspberry Pi will also run a webserver, which we will use to to read and store messages, for anybody else who knows where the WiFi can be found and also have the password.... more...