Before I posted my question in this forum, I spent a long time (weeks) searching the internet to find a functional answer to my question. Unfortunately, I didn’t succeed.
Since I have been using the Heltec LoRa32 V2 for years and it works perfectly with the BME280, I wanted to buy a V2 again. Unfortunately, it is no longer available, so I have to deal with the V3 version.
In your last paragraph, you write that I did not post my question in the Heltec forum as you recommended.
Of course, I wanted to do that immediately, but it didn’t work because I was only activated late yesterday evening.
So I will implement your suggestion in the Heltec forum today. Thank you very much for your help.