I’m not a heavy user of Arduino IDE (it’s terrible!), but the eBook “Learn ESP32 with Arduino IDE” uses it, so I’m stuck with it (I’m on a PC).  I upgraded to IDE 2.0 hoping it would be better, but it’s not.  Anyway, I want to do the ESP_NOW chapter, and have to upload libraries Adafruit_GFX, Adafruit_SSD1306, Adafruit_Sensor, and Adafuit BME280.  In the library manger, these libraries don’t come up, and of course, when I try to build the ESP_NOW_Sender_Receiver_Two_Way.ino  I get: Compilation error: Adafruit_Sensor.h: No such file or directory  (I do have the https://dl.espressif.com/dl/package_esp32_index.json link in File/Preferences)
 
I saw a post on this and downloaded each of those libraries from github, removed the -master on the unzipped version, but I can’t find where to put them.  Unlike IDE 1.x, where libraries are in the /ProgramFiles (x86)/Arduino/libraries directory, in IDE 2.0 (a 64bit compile), the libraries are not obvious.  Any help would be appreciated 🙂

I must have touched a “hornets’ nest” = IDE 2.0.  … ok, so de-installed that; reinstalled IDE 1.8.16, and followed the instructions on pg 425 of “Learn ESP32 using Arduino IDE” eBook, except couldn’t find “Adafruit Unified Sensor Library” … but apparently didn’t need it.  The code of this Module 8 Unit 2 compiles fine, downloads fine and works fine. …. a happy camper here 🙂

Ok.
Great!
At the moment, I don’t recommend using Arduino 2.0 for the ESP32 yet.
Probably the Adafruit Sensor was installed automatically when you installed the BME280 library.
I’m glad everything is working as expected now.
I’ll mark this issue as resolved.
Regards,
Sara