Hi.
That must be just the last part of the error: collect2.exe: error: ld returned 1 exit status
*** [.pio\build\esp32doit-devkit-v1\firmware.elf] Error 1

Can you scroll up on the terminal window and share the rest of the error?.

Alternatively, you may want to send a printscreen. To share a picture, upload a photo to google drive or dropbox and then share a link to the file.

Regards,
Sara

Executing task in folder 1_1_Hello_World: C:\Users\laton\.platformio\penv\Scripts\platformio.exe run
Processing esp32doit-devkit-v1 (platform: espressif32; board: esp32doit-devkit-v1; framework: arduino)
————————————————————————————————–Verbose mode can be enabled via `-v, –verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif32/esp32doit-devkit-v1.html
PLATFORM: Espressif 32 (6.5.0) > DOIT ESP32 DEVKIT V1
HARDWARE: ESP32 240MHz, 320KB RAM, 4MB Flash
DEBUG: Current (cmsis-dap) External (cmsis-dap, esp-bridge, 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 @ 3.20014.231204 (2.0.14)
– tool-esptoolpy @ 1.40501.0 (4.5.1)
– toolchain-xtensa-esp32 @ 8.4.0+2021r2-patch5
LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 35 compatible libraries
Scanning dependencies…
Dependency Graph
|– ESP Async WebServer @ 1.2.3
|– SPIFFS @ 2.0.0
|– AsyncTCP @ 1.1.1
|– WiFi @ 2.0.0
Building in release mode
Linking .pio\build\esp32doit-devkit-v1\firmware.elf
c:/users/laton/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio\build\esp32doit-devkit-v1\libd0d\libESP Async WebServer.a(WebAuthentication.cpp.o):(.literal._ZL6getMD5PhtPc+0x4): undefined reference to `mbedtls_md5_starts’
c:/users/laton/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio\build\esp32doit-devkit-v1\libd0d\libESP Async WebServer.a(WebAuthentication.cpp.o): in function `getMD5(unsigned char*, unsigned short, char*)’:
C:\Users\laton\OneDrive\Documents\PlatformIO\Projects\1_1_Hello_World/.pio/libdeps/esp32doit-devkit-v1/ESP Async WebServer/src/WebAuthentication.cpp:73: undefined reference to `mbedtls_md5_starts’collect2.exe: error: ld returned 1 exit status
*** [.pio\build\esp32doit-devkit-v1\firmware.elf] Error 1
================================== [FAILED] Took 19.79 seconds ==================================
* The terminal process “C:\Users\laton\.platformio\penv\Scripts\platformio.exe ‘run'” terminated with exit code: 1.
* Terminal will be reused by tasks, press any key to close it.

I’m not sure how to save a screen shot but I’ll try to get that too. Ctrl V doesn’t seem to paste screenshots from the clipboard.

here is a link to the VS desktop picture showing my setup

Hi.
What ebook
version do you have?
On the latest version (2.2), page 188 addresses that issue.
I suggest following option 2 or option 3 to fix the issue.
 
If you don’t have the latest eBook version, you can download it here: https://rntlab.com/module-1/welcome-build-web-servers/
 
Let me know if this fixes the issue.
Regards,
Sara

I don’t know my version but it must be the latest because I just bought the course and have been working on it about two weeks.  Somehow I didn’t see several pages right around there. Thanks for the help. I will go back a ways and start this exercise over. 

Ok. Great.
Then, let me know if you were able to solve the issue.
Regards,
Sara

I’m working on  2.3 – WebSocket Web Server chapter. The error came back as usual when I compiled the project for the first time. I mouse over the yellow error message and Ctrl-Click to bring up the WebAuthentication.cpp file and edit the 3 lines of code and then Ctrl-S the changes to save them. Then I went back and recompile as in all previous examples.  This time I get error again but it appears to be on a different file. See attached pictures.
I have tried deleting the folder twice and starting completely from scratch using the course provided data files without modifications and the main.cpp file with my credentials but I continue to get this error.
When I go back to earlier lessons I can compile them and they work as designed.
Notice that yellow file above the error message is a different file.
https://www.dropbox.com/scl/fi/bngnz9gwtxftgpcqe7ub6/IMG_6552.HEIC?rlkey=nlnx3n4des23cs1p4fbxz54x1&dl=0
When I try to do the Ctrl-Click on the file I get this file and error message.
https://www.dropbox.com/scl/fi/njkx8fniyumyja4yy55dj/IMG_6553.HEIC?rlkey=ne1p3ix2vnydh02xwez10hz5n&dl=0
 
 

Hi.
Try to change the platformio.ini file.
Use
platform = espressif32@3.5.0
Instead of 
platform = espressif32
 
Let me know if this solves the issue.
 
Regards,
Sara