Undefined references?

PlatformIO IDE
1

Is this a library issue? Excuse the massive code dump.

* Executing task in folder Waveshare_Weather: platformio run

## Processing esp32dev (board: esp32dev; platform: espressif32; framework: arduino)

Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif32/esp32dev.html
PLATFORM: Espressif 32 (6.12.0) > Espressif ESP32 Dev Module
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 @ 3.20017.241212+sha.dcc1105b
* tool-esptoolpy @ 2.40900.250804 (4.9.0)
* toolchain-xtensa-esp32 @ 8.4.0+2021r2-patch5
  Converting Waveshare_7_5_T7.ino
  LDF: Library Dependency Finder → https://bit.ly/configure-pio-ldf
  LDF Modes: Finder \~ chain, Compatibility \~ soft
  Found 38 compatible libraries
  Scanning dependencies…
  Dependency Graph
  |-- Adafruit EPD @ 4.6.6
  |-- GxEPD2 @ 1.6.5
  |-- U8g2_for_Adafruit_GFX @ 1.8.0
  |-- SPI @ 2.0.0
  |-- WiFi @ 2.0.0
  |-- HTTPClient @ 2.0.0
  Building in release mode
  Compiling .pio/build/esp32dev/src/Waveshare_7_5_T7.ino.cpp.o
  Linking .pio/build/esp32dev/firmware.elf
  /Users/toatess/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: .pio/build/esp32dev/src/Waveshare_7_5_T7.ino.cpp.o:(.literal.\_Z28Convert_Readings_to_Imperialv+0x8): undefined reference to `hPa_to_inHg(float)' /Users/toatess/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: .pio/build/esp32dev/src/Waveshare_7_5_T7.ino.cpp.o:(.literal._Z28Convert_Readings_to_Imperialv+0xc): undefined reference to `mm_to_inches(float)’
  /Users/toatess/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: .pio/build/esp32dev/src/Waveshare_7_5_T7.ino.cpp.o:(.literal.\_Z8DrawMooniiiii6String+0x18): undefined reference to `NormalizedMoonPhase(int, int, int)' /Users/toatess/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: .pio/build/esp32dev/src/Waveshare_7_5_T7.ino.cpp.o:(.literal._Z22DisplayForecastSectionii+0x54): undefined reference to `SumOfPrecip(float\*, int)’
  /Users/toatess/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: .pio/build/esp32dev/src/Waveshare_7_5_T7.ino.cpp.o: in function `Convert_Readings_to_Imperial()': /Users/toatess/Desktop/Waveshare_Weather/src/forecast_record.h:36: undefined reference to `hPa_to_inHg(float)’
  /Users/toatess/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: /Users/toatess/Desktop/Waveshare_Weather/src/forecast_record.h:36: undefined reference to `mm_to_inches(float)' /Users/toatess/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: .pio/build/esp32dev/src/Waveshare_7_5_T7.ino.cpp.o: in function `Convert_Readings_to_Imperial()‘:
  /Users/toatess/Desktop/Waveshare_Weather/src/common.h:15: undefined reference to `mm_to_inches(float)' /Users/toatess/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: .pio/build/esp32dev/src/Waveshare_7_5_T7.ino.cpp.o: in function `DrawMoon(int, int, int, int, int, String)’:
  /Users/toatess/Desktop/Waveshare_Weather/src/Waveshare_7_5_T7.ino:305: undefined reference to `NormalizedMoonPhase(int, int, int)' /Users/toatess/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: .pio/build/esp32dev/src/Waveshare_7_5_T7.ino.cpp.o: in function `DisplayForecastSection(int, int)‘:
  /Users/toatess/Desktop/Waveshare_Weather/src/Waveshare_7_5_T7.ino:400: undefined reference to `SumOfPrecip(float*, int)' /Users/toatess/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: /Users/toatess/Desktop/Waveshare_Weather/src/Waveshare_7_5_T7.ino:400: undefined reference to `SumOfPrecip(float\*, int)’
  collect2: error: ld returned 1 exit status
  \*\*\* \[.pio/build/esp32dev/firmware.elf\] Error 1
  =================================== \[FAILED\] Took 4.65 seconds ===================================


* The terminal process “platformio ‘run’” terminated with exit code: 1.
* Terminal will be reused by tasks, press any key to close it.
2

For better readability, please use preformatted text when posting log and code lines.

Please manually convert the Arduino sketch into valid C++ code and see if the error still occurs. See: Convert Arduino file to C++ manually — PlatformIO latest documentation

3

thanks for the update on formatting text. i found the missing functions.

4

Please let us know the solution so that anyone else searching for it here can find the solution right away.