My setup is as follows:
[LIST]
[*]ESP32-Pi
[*]16 Relay HAT, stack level 4
[*]16 LV Digital Input HAT, stack level 6
[/LIST]
I am using OpenPLC as my development environment, and without using any of the Sequent Microsystems Module function blocks I appear to be able to compile and transfer a simple program to the ESP32-Pi.
However as soon as I add the SM_16DIN or SM_16RELAY function blocks into the program, it fails to compile with the errors listed below, noting multiple references to 'undefined reference to `digIn16Init'' and 'undefined reference to `relay16Init'' type errors.
[2025-06-06T17:08:33.635] C:/Users/xxxxx/AppData/Local/Arduino15/packages/esp32/tools/esp-x32/2411/bin/../lib/gcc/xtensa-esp-elf/14.2.0/../../../../xtensa-esp-elf/bin/ld.exe: C:\Users\xxxxx\AppData\Local\Temp\arduino\sketches\F0E51118FE6867EC570CA64BB84D6C65\libraries\src\POUS.c.o:(.literal.ACU1_body__+0x14): undefined reference to `digIn16Init'
[2025-06-06T17:08:33.660] C:/Users/xxxxx/AppData/Local/Arduino15/packages/esp32/tools/esp-x32/2411/bin/../lib/gcc/xtensa-esp-elf/14.2.0/../../../../xtensa-esp-elf/bin/ld.exe: C:\Users\xxxxx\AppData\Local\Temp\arduino\sketches\F0E51118FE6867EC570CA64BB84D6C65\libraries\src\POUS.c.o:(.literal.ACU1_body__+0x18): undefined reference to `digIn16Get'
[2025-06-06T17:08:33.693] C:/Users/xxxxx/AppData/Local/Arduino15/packages/esp32/tools/esp-x32/2411/bin/../lib/gcc/xtensa-esp-elf/14.2.0/../../../../xtensa-esp-elf/bin/ld.exe: C:\Users\xxxxx\AppData\Local\Temp\arduino\sketches\F0E51118FE6867EC570CA64BB84D6C65\libraries\src\POUS.c.o:(.literal.ACU1_body__+0x1c): undefined reference to `relay16Init'
[2025-06-06T17:08:33.724] C:/Users/xxxxx/AppData/Local/Arduino15/packages/esp32/tools/esp-x32/2411/bin/../lib/gcc/xtensa-esp-elf/14.2.0/../../../../xtensa-esp-elf/bin/ld.exe: C:\Users\xxxxx\AppData\Local\Temp\arduino\sketches\F0E51118FE6867EC570CA64BB84D6C65\libraries\src\POUS.c.o:(.literal.ACU1_body__+0x20): undefined reference to `relay16Set'
[2025-06-06T17:08:33.756] C:/Users/xxxxx/AppData/Local/Arduino15/packages/esp32/tools/esp-x32/2411/bin/../lib/gcc/xtensa-esp-elf/14.2.0/../../../../xtensa-esp-elf/bin/ld.exe: C:\Users\xxxxx\AppData\Local\Temp\arduino\sketches\F0E51118FE6867EC570CA64BB84D6C65\libraries\src\POUS.c.o: in function `SM_16DIN_body__':
[2025-06-06T17:08:33.788] C:\Users\xxxxx\OpenPLC_Editor\editor\arduino\src\lib/sm_cards.h:553:(.text.ACU1_body__+0x42a): undefined reference to `digIn16Init'
[2025-06-06T17:08:33.820] C:/Users/xxxxx/AppData/Local/Arduino15/packages/esp32/tools/esp-x32/2411/bin/../lib/gcc/xtensa-esp-elf/14.2.0/../../../../xtensa-esp-elf/bin/ld.exe: C:\Users\xxxxx\OpenPLC_Editor\editor\arduino\src\lib/sm_cards.h:562:(.text.ACU1_body__+0x446): undefined reference to `digIn16Get'
[2025-06-06T17:08:33.852] C:/Users/xxxxx/AppData/Local/Arduino15/packages/esp32/tools/esp-x32/2411/bin/../lib/gcc/xtensa-esp-elf/14.2.0/../../../../xtensa-esp-elf/bin/ld.exe: C:\Users\xxxxx\AppData\Local\Temp\arduino\sketches\F0E51118FE6867EC570CA64BB84D6C65\libraries\src\POUS.c.o: in function `SM_16RELAY_body__':
[2025-06-06T17:08:33.883] C:\Users\xxxxx\OpenPLC_Editor\editor\arduino\src\lib/sm_cards.h:423:(.text.ACU1_body__+0x573): undefined reference to `relay16Init'
[2025-06-06T17:08:33.913] C:/Users/xxxxx/AppData/Local/Arduino15/packages/esp32/tools/esp-x32/2411/bin/../lib/gcc/xtensa-esp-elf/14.2.0/../../../../xtensa-esp-elf/bin/ld.exe: C:\Users\xxxxx\OpenPLC_Editor\editor\arduino\src\lib/sm_cards.h:443:(.text.ACU1_body__+0x610): undefined reference to `relay16Set'
[2025-06-06T17:08:34.007] collect2.exe: error: ld returned 1 exit status
[2025-06-06T17:08:34.068] Multiple libraries were found for "WiFi.h"
[2025-06-06T17:08:34.100] Used: C:\Users\xxxxx\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.2.0\libraries\WiFi
[2025-06-06T17:08:34.132] Not used: C:\Users\xxxxx\OneDrive\My OneDrive Documents\Arduino\libraries\WiFiNINA
[2025-06-06T17:08:34.163] Using library src in folder: C:\Users\xxxxx\OpenPLC_Editor\editor\arduino\src (legacy)
[2025-06-06T17:08:34.211] Using library WiFi at version 3.2.0 in folder: C:\Users\xxxxx\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.2.0\libraries\WiFi
[2025-06-06T17:08:34.242] Using library Networking at version 3.2.0 in folder: C:\Users\xxxxx\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.2.0\libraries\Network
[2025-06-06T17:08:34.274] Using library lib in folder: C:\Users\xxxxx\OpenPLC_Editor\editor\arduino\src\lib (legacy)
[2025-06-06T17:08:34.487]
[2025-06-06T17:08:34.524] Used library Version Path
[2025-06-06T17:08:34.556] src C:\Users\xxxxx\OpenPLC_Editor\editor\arduino\src
[2025-06-06T17:08:34.557] WiFi 3.2.0 C:\Users\xxxxx\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.2.0\libraries\WiFi
[2025-06-06T17:08:34.557] Networking 3.2.0 C:\Users\xxxxx\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.2.0\libraries\Network
[2025-06-06T17:08:34.557] lib C:\Users\xxxxx\OpenPLC_Editor\editor\arduino\src\lib
[2025-06-06T17:08:34.558]
[2025-06-06T17:08:34.558] Used platform Version Path
[2025-06-06T17:08:34.558] esp32:esp32 3.2.0 C:\Users\xxxxx\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.2.0
[2025-06-06T17:08:34.558] Error during build: exit status 1
[2025-06-06T17:08:34.559] $? = 1
[2025-06-06T17:08:34.559] Build phase .build_project at 0x0000020656589F70> failed If I remove the Sequent Microsystems function block, it compiles again fine.
While I'm hoping there's a simple explanation for this, I'm running out of things to try, and at present I'm unable to successfully compile any program that includes the Sequent function blocks.
Another odd one is in order to verify it's doing something, I have a simple timer to flash the ESP32-PI onboard LED. If I execute the transfer with Board Type set to SEQUENT-ESP32-PI [3.2.0], it doesn't flash. If I change the Board Type to 'ESP32-WROOM', it does flash. Both options appear to compile and upload okay.
Any ideas what to try next?
Thanks!
