platform-espressif8266 VS platformio-docs

In this thread they're trying to flash 1MB firmware but the tool appears to be compiling to 4MB and refusing to flash. I think this is the issue you're having, I would suggest you update ESPHome to the latest version and try Cleaning your build files. This thread also reinforces my feeling that you didn't actually flash a 4MB firmware onto a 1MB ESP, because that's failing to happen here.

; PlatformIO Project Configuration File [platformio] # ------------------------------------------------------------------------------ # ENVIRONMENTS # ------------------------------------------------------------------------------ # Release / CI binaries default_envs = adafruit_feather_esp32s3 src_dir = ./wled00 data_dir = ./wled00/data build_cache_dir = ~/.buildcache extra_configs = platformio_override.ini [common] # ------------------------------------------------------------------------------ # PLATFORM: # !! DO NOT confuse platformio's ESP8266 development platform with Arduino core for ESP8266 # # arduino core 2.6.3 = platformIO 2.3.2 # arduino core 2.7.0 = platformIO 2.5.0 # ------------------------------------------------------------------------------ arduino_core_2_6_3 = [email protected] arduino_core_2_7_4 = [email protected] arduino_core_3_0_0 = [email protected] arduino_core_3_2_0 = [email protected] # Development platforms arduino_core_develop = https://github.com/platformio/platform-espressif8266#develop arduino_core_git = https://github.com/platformio/platform-espressif8266#feature/stage # Platform to use for ESP8266 platform_wled_default = ${common.arduino_core_3_2_0} # We use 2.7.4.7 for all, includes PWM flicker fix and Wstring optimization platform_packages = tasmota/framework-arduinoespressif8266 @ 3.20704.7 platformio/toolchain-xtensa @ ~2.40802.200502 platformio/tool-esptool @ ~1.413.0 platformio/tool-esptoolpy @ ~1.30000.0 # ------------------------------------------------------------------------------ # FLAGS: DEBUG # # ------------------------------------------------------------------------------ debug_flags = -D DEBUG=1 -D WLED_DEBUG -DDEBUG_ESP_WIFI -DDEBUG_ESP_HTTP_CLIENT -DDEBUG_ESP_HTTP_UPDATE -DDEBUG_ESP_HTTP_SERVER -DDEBUG_ESP_UPDATER -DDEBUG_ESP_OTA -DDEBUG_TLS_MEM #if needed (for memleaks etc) also add; -DDEBUG_ESP_OOM -include "umm_malloc/umm_malloc_cfg.h" #-DDEBUG_ESP_CORE is not working right now # ------------------------------------------------------------------------------ # FLAGS: ldscript (available ldscripts at https://github.com/esp8266/Arduino/tree/master/tools/sdk/ld) # ldscript_2m1m (2048 KB) = 1019 KB sketch, 4 KB eeprom, 1004 KB spiffs, 16 KB reserved # ldscript_4m1m (4096 KB) = 1019 KB sketch, 4 KB eeprom, 1002 KB spiffs, 16 KB reserved, 2048 KB empty/ota? # # Available lwIP variants (macros): # -DPIO_FRAMEWORK_ARDUINO_LWIP_HIGHER_BANDWIDTH = v1.4 Higher Bandwidth (default) # -DPIO_FRAMEWORK_ARDUINO_LWIP2_LOW_MEMORY = v2 Lower Memory # -DPIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH = v2 Higher Bandwidth # -DPIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH_LOW_FLASH # # BearSSL performance: # When building with -DSECURE_CLIENT=SECURE_CLIENT_BEARSSL, please add `board_build.f_cpu = 160000000` to the environment configuration # # BearSSL ciphers: # When building on core >= 2.5, you can add the build flag -DBEARSSL_SSL_BASIC in order to build BearSSL with a limited set of ciphers: # TLS_RSA_WITH_AES_128_CBC_SHA256 / AES128-SHA256 # TLS_RSA_WITH_AES_256_CBC_SHA256 / AES256-SHA256 # TLS_RSA_WITH_AES_128_CBC_SHA / AES128-SHA # TLS_RSA_WITH_AES_256_CBC_SHA / AES256-SHA # This reduces the OTA size with ~45KB, so it's especially useful on low memory boards (512k/1m). # ------------------------------------------------------------------------------ build_flags = -DMQTT_MAX_PACKET_SIZE=1024 -DSECURE_CLIENT=SECURE_CLIENT_BEARSSL -DBEARSSL_SSL_BASIC -D CORE_DEBUG_LEVEL=0 -D NDEBUG #build_flags for the IRremoteESP8266 library (enabled decoders have to appear here) -D _IR_ENABLE_DEFAULT_=false -D DECODE_HASH=true -D DECODE_NEC=true -D DECODE_SONY=true -D DECODE_SAMSUNG=true -D DECODE_LG=true ; -Dregister= # remove warnings in C++17 due to use of deprecated register keyword by the FastLED library -DWLED_USE_MY_CONFIG ; -D USERMOD_SENSORSTOMQTT #For ADS1115 sensor uncomment following ; -D USERMOD_ADS1115 build_unflags = build_flags_esp8266 = ${common.build_flags} ${esp8266.build_flags} build_flags_esp32 = ${common.build_flags} ${esp32.build_flags} ldscript_1m128k = eagle.flash.1m128.ld ldscript_2m512k = eagle.flash.2m512.ld ldscript_2m1m = eagle.flash.2m1m.ld ldscript_4m1m = eagle.flash.4m1m.ld [scripts_defaults] extra_scripts = pre:pio-scripts/set_version.py post:pio-scripts/output_bins.py post:pio-scripts/strip-floats.py pre:pio-scripts/user_config_copy.py # ------------------------------------------------------------------------------ # COMMON SETTINGS: # ------------------------------------------------------------------------------ [env] framework = arduino board_build.flash_mode = dout monitor_speed = 115200 upload_speed = 921600 # ------------------------------------------------------------------------------ # LIBRARIES: required dependencies # Please note that we don't always use the latest version of a library. # # The following libraries have been included (and some of them changd) in the source: # [email protected], [email protected](changed), [email protected](changed), [email protected], [email protected] # ------------------------------------------------------------------------------ lib_compat_mode = strict lib_deps = fastled/FastLED @ 3.5.0 IRremoteESP8266 @ 2.8.2 https://github.com/Aircoookie/ESPAsyncWebServer.git @ ~2.0.7 extra_scripts = ${scripts_defaults.extra_scripts} [esp32] #platform = https://github.com/tasmota/platform-espressif32/releases/download/v2.0.2.3/platform-espressif32-2.0.2.3.zip platform = [email protected] platform_packages = framework-arduinoespressif32 @ https://github.com/Aircoookie/arduino-esp32.git#1.0.6.4 build_flags = -g -DARDUINO_ARCH_ESP32 ;-DCONFIG_LITTLEFS_FOR_IDF_3_2 -D CONFIG_ASYNC_TCP_USE_WDT=0 #use LITTLEFS library by lorol in ESP32 core 1.x.x instead of built-in in 2.x.x -D LOROL_LITTLEFS default_partitions = tools/WLED_ESP32_4MB_1MB_FS.csv lib_deps = ${env.lib_deps} https://github.com/lorol/LITTLEFS.git makuna/NeoPixelBus @ 2.6.9 https://github.com/pbolduc/AsyncTCP.git @ 1.2.0 [esp32c3] build_flags = -g -DARDUINO_ARCH_ESP32 -DARDUINO_ARCH_ESP32C3 -DCONFIG_IDF_TARGET_ESP32C3 -D CONFIG_ASYNC_TCP_USE_WDT=0 -DCO lib_deps = ${env.lib_deps} makuna/NeoPixelBus @ 2.6.9 https://github.com/pbolduc/AsyncTCP.git @ 1.2.0 [esp32s3] ;; generic definitions for all ESP32-S3 boards build_flags = -g -DESP32 -DARDUINO_ARCH_ESP32 -DARDUINO_ARCH_ESP32S3 -DCONFIG_IDF_TARGET_ESP32S3 -D CONFIG_ASYNC_TCP_USE_WDT=0 -DCO lib_deps = ${env.lib_deps} ;; NeoPixelBus 2.7.1 is the first that has official support for ESP32-S3 makuna/NeoPixelBus @ ~2.7.1 https://github.com/pbolduc/AsyncTCP.git @ 1.2.0 # ------------------------------------------------------------------------------ # WLED BUILDS # ------------------------------------------------------------------------------ [env:esp32c3] platform = [email protected] framework = arduino board = esp32-c3-devkitm-1 board_build.partitions = tools/WLED_ESP32_4MB_1MB_FS.csv build_flags = ${common.build_flags} ${esp32c3.build_flags} #-D WLED_RELEASE_NAME=ESP32-C3 -D WLED_WATCHDOG_TIMEOUT=0 upload_speed = 460800 build_unflags = ${common.build_unflags} lib_deps = ${esp32c3.lib_deps} [env:adafruit_feather_esp32s3] ;; Adafruit ESP32-S3 Feather board, with 4MB FLASH and 2MB PSRAM (memory_type: qio_opi, qio_qspi, or opi_opi) board = adafruit_feather_esp32s3 platform = espressif32 @ ~5.2.0 board_build.f_cpu = 240000000L platform_packages = upload_speed = 921600 build_unflags = ${common.build_unflags} build_flags = ${common.build_flags} ${esp32s3.build_flags} -D CONFIG_LITTLEFS_FOR_IDF_3_2 -D WLED_WATCHDOG_TIMEOUT=0 -D ARDUINO_USB_MODE=1 -D ARDUINO_USB_MSC_ON_BOOT=0 ; -D ARDUINO_USB_CDC_ON_BOOT=0 ; -D WLED_RELEASE_NAME=ESP32-S3_PSRAM -D WLED_USE_PSRAM -DBOARD_HAS_PSRAM ; tells WLED that PSRAM shall be used ; -D CONFIG_LITTLEFS_SPIFFS_COMPAT=1 ; lib_deps = ${esp32s3.lib_deps} board_build.f_flash = 80000000L board_build.flash_mode = qio monitor_filters = esp32_exception_decoder

Ref: https://github.com/platformio/platform-espressif8266/issues/219

But ultimately platform.io it is an (ukrainian) open source project maintained by few and this most likely in free time. If you experience a lack of information, I would strongly suggest to contribute your experience to the project docs here and add the missing parts/hints to the documentation via pull request.