Several months ago I was studying “Building Web Servers ESP32 ESP8266 v2.1”. I was able to successfully build and run examples ‘1.1 – Hello World Web Server’ through and including ‘3.1 – Web Server: Display Sensor Readings (SSE)’ using VS Code and Platform IO. I learned a lot. Thank you both, Sara and Rui. I had to abandon my efforts for at least six months and am now getting back to the book and examples. I decided to spend some review time going over what I had accomplished six months prior. I loaded VSCode/PlatformIO and performed all of the updates I could find. I am now getting a error in all of the examples and I am not sure what I need to do. Here is the output from one of the samples,
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> Executing task in folder 2_3_Control_Outputs: C:\Users\pauls\.platformio\penv\Scripts\platformio.exe run –environment esp32dev <
Processing esp32dev (platform: espressif32; board: esp32dev; framework: arduino)
——————————————————————————————————————–Verbose mode can be enabled via `-v, –verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif32/esp32dev.html
PLATFORM: Espressif 32 (4.2.0) > Espressif ESP32 Dev Module
HARDWARE: ESP32 240MHz, 320KB RAM, 4MB Flash
DEBUG: Current (cmsis-dap) External (cmsis-dap, esp-prog, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa)
PACKAGES:
– framework-arduinoespressif32 @ 3.20002.220503 (2.0.2)
– tool-esptoolpy @ 1.30300.0 (3.3.0)
– toolchain-xtensa-esp32 @ 8.4.0+2021r2-patch3
LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 33 compatible libraries
Scanning dependencies…
Dependency Graph
|– ESP Async WebServer @ 1.2.3
| |– AsyncTCP @ 1.1.1
| |– FS @ 2.0.0
| |– WiFi @ 2.0.0
|– SPIFFS @ 2.0.0
| |– FS @ 2.0.0
|– AsyncTCP @ 1.1.1
|– WiFi @ 2.0.0
Building in release mode
Linking .pio\build\esp32dev\firmware.elf
c:/users/pauls/.platformio/packages/toolchain-xtensa-esp32@8.4.0+2021r2-patch3/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio\build\esp32dev\lib08d\libESP Async WebServer.a(AsyncWebSocket.cpp.o):(.literal._ZN22AsyncWebSocketResponseC2ERK6StringP14AsyncWebSocket+0x10): undefined reference to `SHA1Init’
c:/users/pauls/.platformio/packages/toolchain-xtensa-esp32@8.4.0+2021r2-patch3/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio\build\esp32dev\lib08d\libESP Async WebServer.a(AsyncWebSocket.cpp.o):(.literal._ZN22AsyncWebSocketResponseC2ERK6StringP14AsyncWebSocket+0x18): undefined reference to `SHA1Update’
c:/users/pauls/.platformio/packages/toolchain-xtensa-esp32@8.4.0+2021r2-patch3/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio\build\esp32dev\lib08d\libESP Async WebServer.a(AsyncWebSocket.cpp.o):(.literal._ZN22AsyncWebSocketResponseC2ERK6StringP14AsyncWebSocket+0x1c): undefined reference to `SHA1Final’
c:/users/pauls/.platformio/packages/toolchain-xtensa-esp32@8.4.0+2021r2-patch3/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio\build\esp32dev\lib08d\libESP Async WebServer.a(AsyncWebSocket.cpp.o): in function `AsyncWebSocketResponse::AsyncWebSocketResponse(String const&, AsyncWebSocket*)’:
C:\Users\pauls\Documents\PlatformIO\Projects\2_3_Control_Outputs/.pio/libdeps/esp32dev/ESP Async WebServer/src/AsyncWebSocket.cpp:1269: undefined reference to `SHA1Init’
c:/users/pauls/.platformio/packages/toolchain-xtensa-esp32@8.4.0+2021r2-patch3/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\pauls\Documents\PlatformIO\Projects\2_3_Control_Outputs/.pio/libdeps/esp32dev/ESP Async WebServer/src/AsyncWebSocket.cpp:1270: undefined reference to `SHA1Update’
c:/users/pauls/.platformio/packages/toolchain-xtensa-esp32@8.4.0+2021r2-patch3/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\pauls\Documents\PlatformIO\Projects\2_3_Control_Outputs/.pio/libdeps/esp32dev/ESP Async WebServer/src/AsyncWebSocket.cpp:1271: undefined reference to `SHA1Final’
collect2.exe: error: ld returned 1 exit status
*** [.pio\build\esp32dev\firmware.elf] Error 1
=========================================== [FAILED] Took 25.80 seconds ===========================================
The terminal process “C:\Users\pauls\.platformio\penv\Scripts\platformio.exe ‘run’, ‘–environment’, ‘esp32dev'” terminated with exit code: 1.
Terminal will be reused by tasks, press any key to close it.
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Basically, I am getting an undefined reference error in the file AsyncWebSocket.cpp for SHA1Init, SHA1Update and SHA1Final. Usually, I am pretty good at resolving errors like these, but I’m not having any luck. Any suggestions, please?
Paul