Memory Overflow Issue on ESP32-C3 DevKit (Wi-Fi, HTTP with TLS, Firmware Update); Zephyr version: 4.1.99

[pawankumar0099]

Hi everyone,

I'm building an application on the ESP32-C3 DevKit that includes Wi-Fi, HTTP with TLS, and a firmware update section. I'm using examples from the zephyr samples as a reference.

However, I'm now running into a memory overflow issue, particularly related to DRAM usage.

Is there any way to optimize the memory layout — like reducing the DRAM usage or shifting some parts to IRAM instead? I’m stuck and would really appreciate suggestions or best practices to resolve this.

Logs:
-- west build: making build dir /home/pawan/zephyrproject/zephyr/build pristine
-- west build: generating a build system
Loading Zephyr default modules (Zephyr base).
-- Application: /home/pawan/zephyrproject/htttps_ota/hello_world
-- CMake version: 3.22.1
-- Found Python3: /home/pawan/zephyrproject/.venv/bin/python3 (found suitable version "3.10.12", minimum required is "3.10") found components: Interpreter
-- Cache files will be written to: /home/pawan/.cache/zephyr
-- Zephyr version: 4.1.99 (/home/pawan/zephyrproject/zephyr)
-- Found west (found suitable version "1.4.0", minimum required is "0.14.0")
-- Board: esp32c3_devkitm, qualifiers: esp32c3
-- ZEPHYR_TOOLCHAIN_VARIANT not set, trying to locate Zephyr SDK
-- Found host-tools: zephyr 0.17.1 (/home/pawan/zephyr-sdk-0.17.1)
-- Found toolchain: zephyr 0.17.1 (/home/pawan/zephyr-sdk-0.17.1)
-- Found Dtc: /home/pawan/zephyr-sdk-0.17.1/sysroots/x86_64-pokysdk-linux/usr/bin/dtc (found suitable version "1.7.0", minimum required is "1.4.6")
-- Found BOARD.dts: /home/pawan/zephyrproject/zephyr/boards/espressif/esp32c3_devkitm/esp32c3_devkitm.dts
-- Found devicetree overlay: /home/pawan/zephyrproject/htttps_ota/hello_world/boards/esp32c3_devkitm.overlay
-- Generated zephyr.dts: /home/pawan/zephyrproject/zephyr/build/zephyr/zephyr.dts
-- Generated pickled edt: /home/pawan/zephyrproject/zephyr/build/zephyr/edt.pickle
-- Generated devicetree_generated.h: /home/pawan/zephyrproject/zephyr/build/zephyr/include/generated/zephyr/devicetree_generated.h
Parsing /home/pawan/zephyrproject/zephyr/Kconfig
Loaded configuration '/home/pawan/zephyrproject/zephyr/boards/espressif/esp32c3_devkitm/esp32c3_devkitm_defconfig'
Merged configuration '/home/pawan/zephyrproject/htttps_ota/hello_world/prj.conf'
Merged configuration '/home/pawan/zephyrproject/htttps_ota/hello_world/overlay-tls.conf'
Configuration saved to '/home/pawan/zephyrproject/zephyr/build/zephyr/.config'
Kconfig header saved to '/home/pawan/zephyrproject/zephyr/build/zephyr/include/generated/zephyr/autoconf.h'
-- Found GnuLd: /home/pawan/zephyr-sdk-0.17.1/riscv64-zephyr-elf/riscv64-zephyr-elf/bin/ld.bfd (found version "2.38")
-- The C compiler identification is GNU 12.2.0
-- The CXX compiler identification is GNU 12.2.0
-- The ASM compiler identification is GNU
-- Found assembler: /home/pawan/zephyr-sdk-0.17.1/riscv64-zephyr-elf/bin/riscv64-zephyr-elf-gcc
-- Espressif HAL path: /home/pawan/zephyrproject/modules/hal/espressif
-- Image partition /soc/flash-controller@60002000/flash@0/partitions/partition@20000
-- Found gen_kobject_list: /home/pawan/zephyrproject/zephyr/scripts/build/gen_kobject_list.py
-- Including signing script: /home/pawan/zephyrproject/zephyr/cmake/mcuboot.cmake
-- Configuring done
-- Generating done
-- Build files have been written to: /home/pawan/zephyrproject/zephyr/build
-- west build: building application
[1/582] Preparing syscall dependency handling

[2/582] Generating include/generated/zephyr/app_version.h
-- git describe failed: fatal: not a git repository (or any of the parent directories): .git
[4/582] Generating include/generated/zephyr/version.h
-- Zephyr version: 4.1.99 (/home/pawan/zephyrproject/zephyr), build: v4.1.0-5752-ga4f702b85753
[577/582] Linking C executable zephyr/zephyr_pre0.elf
FAILED: zephyr/zephyr_pre0.elf zephyr/zephyr_pre0.map /home/pawan/zephyrproject/zephyr/build/zephyr/zephyr_pre0.map
: && /home/pawan/zephyr-sdk-0.17.1/riscv64-zephyr-elf/bin/riscv64-zephyr-elf-gcc -gdwarf-4 zephyr/CMakeFiles/zephyr_pre0.dir/misc/empty_file.c.obj -o zephyr/zephyr_pre0.elf zephyr/CMakeFiles/offsets.dir/./arch/riscv/core/offsets/offsets.c.obj -T zephyr/linker_zephyr_pre0.cmd -Wl,-Map=/home/pawan/zephyrproject/zephyr/build/zephyr/zephyr_pre0.map -Wl,--whole-archive app/libapp.a zephyr/libzephyr.a zephyr/arch/common/libarch__common.a zephyr/arch/arch/riscv/core/libarch__riscv__core.a zephyr/lib/libc/picolibc/liblib__libc__picolibc.a zephyr/lib/libc/common/liblib__libc__common.a zephyr/lib/posix/options/liblib__posix__options.a zephyr/lib/net_buf/liblib__net_buf.a zephyr/lib/os/zvfs/liblib__os__zvfs.a zephyr/subsys/fs/libsubsys__fs.a zephyr/subsys/random/libsubsys__random.a zephyr/subsys/dfu/boot/libsubsys__dfu__boot.a zephyr/subsys/net/libsubsys__net.a zephyr/subsys/net/l2/ethernet/libsubsys__net__l2__ethernet.a zephyr/subsys/net/l2/wifi/libsubsys__net__l2__wifi.a zephyr/subsys/net/ip/libsubsys__net__ip.a zephyr/subsys/net/lib/config/libsubsys__net__lib__config.a zephyr/subsys/net/lib/dhcpv4/libsubsys__net__lib__dhcpv4.a zephyr/subsys/net/lib/dns/libsubsys__net__lib__dns.a zephyr/subsys/net/lib/http/libsubsys__net__lib__http.a zephyr/drivers/interrupt_controller/libdrivers__interrupt_controller.a zephyr/drivers/clock_control/libdrivers__clock_control.a zephyr/drivers/console/libdrivers__console.a zephyr/drivers/entropy/libdrivers__entropy.a zephyr/drivers/flash/libdrivers__flash.a zephyr/drivers/gpio/libdrivers__gpio.a zephyr/drivers/hwinfo/libdrivers__hwinfo.a zephyr/drivers/pinctrl/libdrivers__pinctrl.a zephyr/drivers/serial/libdrivers__serial.a zephyr/drivers/timer/libdrivers__timer.a zephyr/drivers/wifi/libdrivers__wifi.a modules/mbedtls/libmbedTLSBase.a modules/mbedtls/libmbedTLSCrypto.a modules/mbedtls/libmbedTLSX509.a modules/mbedtls/libmodules__mbedtls.a modules/mcuboot/libmcuboot_util.a -Wl,--no-whole-archive zephyr/kernel/libkernel.a -L/home/pawan/zephyrproject/zephyr/build/zephyr zephyr/arch/common/libisr_tables.a modules/mbedtls/libmbedTLSBase.a modules/mbedtls/libmbedTLSCrypto.a modules/mbedtls/libmbedTLSX509.a -mabi=ilp32 -march=rv32imc_zicsr -fuse-ld=bfd -Wl,--gc-sections -Wl,--build-id=none -Wl,--sort-common=descending -Wl,--sort-section=alignment -Wl,-u,_OffsetAbsSyms -Wl,-u,_ConfigAbsSyms -nostdlib -static -Wl,-X -Wl,-N -Wl,--orphan-handling=warn -Wl,-no-pie -specs=picolibc.specs -DPICOLIBC_LONG_LONG_PRINTF_SCANF -T/home/pawan/zephyrproject/modules/hal/espressif/zephyr/esp32c3/src/linker/esp32c3.rom.alias.ld -T/home/pawan/zephyrproject/modules/hal/espressif/zephyr/esp32c3/../../components/esp_rom/esp32c3/ld/esp32c3.rom.ld -T/home/pawan/zephyrproject/modules/hal/espressif/zephyr/esp32c3/../../components/esp_rom/esp32c3/ld/esp32c3.rom.api.ld -T/home/pawan/zephyrproject/modules/hal/espressif/zephyr/esp32c3/../../components/esp_rom/esp32c3/ld/esp32c3.rom.libgcc.ld -T/home/pawan/zephyrproject/modules/hal/espressif/zephyr/esp32c3/../../components/esp_rom/esp32c3/ld/esp32c3.rom.newlib.ld -T/home/pawan/zephyrproject/modules/hal/espressif/zephyr/esp32c3/../../components/esp_rom/esp32c3/ld/esp32c3.rom.version.ld -T/home/pawan/zephyrproject/modules/hal/espressif/zephyr/esp32c3/../../components/soc/esp32c3/ld/esp32c3.peripherals.ld -T/home/pawan/zephyrproject/modules/hal/espressif/zephyr/esp32c3/../../components/esp_rom/esp32c3/ld/esp32c3.rom.eco3.ld -lgcc -lnet80211 -lcore -lpp -lphy -lmesh -lgcc -lnet80211 -lcore -lpp -lphy -lmesh -L/home/pawan/zephyrproject/modules/hal/espressif/zephyr/esp32c3/../blobs/lib/esp32c3 -L"/home/pawan/zephyr-sdk-0.17.1/riscv64-zephyr-elf/bin/../lib/gcc/riscv64-zephyr-elf/12.2.0" -lc -lgcc && cd /home/pawan/zephyrproject/zephyr/build/zephyr && /usr/bin/cmake -E true
/home/pawan/zephyr-sdk-0.17.1/riscv64-zephyr-elf/bin/../lib/gcc/riscv64-zephyr-elf/12.2.0/../../../../riscv64-zephyr-elf/bin/ld.bfd: zephyr/zephyr_pre0.elf section .dram0.bss' will not fit in region dram0_0_seg'
/home/pawan/zephyr-sdk-0.17.1/riscv64-zephyr-elf/bin/../lib/gcc/riscv64-zephyr-elf/12.2.0/../../../../riscv64-zephyr-elf/bin/ld.bfd: SRAM instruction/data does not fit.
/home/pawan/zephyr-sdk-0.17.1/riscv64-zephyr-elf/bin/../lib/gcc/riscv64-zephyr-elf/12.2.0/../../../../riscv64-zephyr-elf/bin/ld.bfd: region `dram0_0_seg' overflowed by 1520 bytes
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.