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feat: add support for build-time WiFi credentials from .env file

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GW_MC
2026-01-24 17:14:32 +08:00
parent 39c4cfd85f
commit 143a28de90
3 changed files with 50 additions and 0 deletions
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3
.gitignore vendored
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@@ -85,3 +85,6 @@ Desktop.ini
# sample code
sample-code/
.env
*.env

34
CMakeLists.txt
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@@ -3,6 +3,40 @@
cmake_minimum_required(VERSION 3.16)
# target_compile_options(${COMPONENT_LIB} PRIVATE -std=c++23)
# Define the path to your .env file
set(ENV_FILE "${CMAKE_SOURCE_DIR}/.env")
# Check if the .env file exists
if(EXISTS ${ENV_FILE})
# Read the .env file line by line
file(STRINGS ${ENV_FILE} ENV_VARS)
foreach(VAR ${ENV_VARS})
# Use regex to extract the key and value
if (VAR MATCHES "([^=]+)=(.*)")
set(ENV{${CMAKE_MATCH_1}} ${CMAKE_MATCH_2})
message(STATUS "Loaded environment variable from .env: ${CMAKE_MATCH_1}")
endif()
endforeach()
else()
message(STATUS ".env file not found at ${ENV_FILE}")
endif()
# If build-time WiFi environment variables were loaded above, expose them
# as compile-time definitions so C++ can use them.
if(DEFINED ENV{WIFI_SSID})
add_compile_definitions(BUILD_WIFI_SSID="$ENV{WIFI_SSID}")
message(STATUS "Added BUILD_WIFI_SSID compile definition")
else()
message(STATUS "WIFI_SSID not defined; skipping BUILD_WIFI_SSID compile definition")
endif()
if(DEFINED ENV{WIFI_PASSWORD})
add_compile_definitions(BUILD_WIFI_PASSWORD="$ENV{WIFI_PASSWORD}")
message(STATUS "Added BUILD_WIFI_PASSWORD compile definition")
else()
message(STATUS "WIFI_PASSWORD not defined; skipping BUILD_WIFI_PASSWORD compile definition")
endif()
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
# "Trim" the build. Include the minimal set of components, main, and anything it depends on.
idf_build_set_property(MINIMAL_BUILD ON)

13
main/network/wifi_handler.cpp
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@@ -120,6 +120,19 @@ esp_err_t WifiHandler::init() {
std::string password;
this->get_wifi_credentials(ssid, password);
// If KV storage didn't provide credentials, allow build-time injected values
// via compile-time defines BUILD_WIFI_SSID and BUILD_WIFI_PASSWORD.
#if defined(BUILD_WIFI_SSID) and defined(BUILD_WIFI_PASSWORD)
if (ssid.empty()) {
ssid = std::string(BUILD_WIFI_SSID);
ESP_LOGI(TAG, "Using build-time injected WiFi SSID");
}
if (password.empty()) {
password = std::string(BUILD_WIFI_PASSWORD);
ESP_LOGI(TAG, "Using build-time injected WiFi password");
}
#endif
if (!ssid.empty() && !password.empty()) {
ESP_LOGI(TAG, "Found stored WiFi credentials, connecting to SSID: %s", ssid.c_str());
err = this->connect(ssid, password);