I discovered the https://iot2tangle.io/hub.html webpage. I tried to set up a project from the page using the STM32_B-L475E-IOT01A BLE project https://github.com/iot2tangle/STM32_B-L475E-IOT01A/tree/main/BLE-sender. I was able to set up a BLE connection to my android phone. I later tried to publish the data over the STREAMS BLE Gateway like in the description described (STEP Setting up the Streams BLE Gateway). But I receive an error
Is the project Iot2Tangle still working? I have found another streams project from iota https://github.com/iotaledger/streams but its not clear whether publishing BLE streams is supported