Adafruit_SH1106.cpp and ESP32

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1

Arduino: 1.8.19 (Windows 10), Board: "DOIT ESP32 DEVKIT V1, 80MHz, 921600, None, Disabled"

I'm getting the following error when compiling for ESP-WROOM 32:

C:\arduino-1.8.19\arduino-1.8.19\libraries\Adafruit_SH1106-master\Adafruit_SH1106.cpp:29:10: fatal error: avr/pgmspace.h: No such file or directory
29 | #include <avr/pgmspace.h>
| ^~~~~~~~~~~~~~~~

The IDE documentation says that <avr/pgmspace.h> is part of the IDE and doesn't require including a library to have it available. Is there a conflict because the ESP32 is not AVR?

Is there another library for the SH1106 that is recommended for the ESP32?

2

Hi @Dr_Quark.

It is part of the AVR-libC component of the toolchain for platforms like the "Arduino AVR Boards" platform:

It is not completely wrong to say "part of the IDE", since the "Arduino AVR Boards" was bundled with Arduino IDE 1.x, but it definitely isn't correct either.

Arduino does provide a header file which can be added to boards platforms for other architectures as a dummy replacement for the AVR-libC component to allow code that uses that header to compile for the boards of the platform:

However, the ESP32 boards platform doesn't make use of that header file, and so any library that relies on avr/pgmspace.h is not compatible with ESP32 boards.

I haven't used it, so I can't provide a recommendation, but the "Adafruit SH110X" library looks promising.