platformio: allow building with espressif framework (instead of tasmota)

* add necessary platform and platform_packages entries (commented out)
* compatibility patch for ADC_ATTEN_DB_11

Author: softhack007

platformio.ini

@@ -298,8 +298,18 @@ AR_lib_deps =  ;; for pre-usermod-library platformio_override compatibility
 ;; please note that you can NOT update existing ESP32 installs with a "V4" build. Also updating by OTA will not work properly.
 ;; You need to completely erase your device (esptool erase_flash) first, then install the "V4" build from VSCode+platformio.
 
+;; tasmota platform (default)
 platform = https://github.com/tasmota/platform-espressif32/releases/download/2024.06.00/platform-espressif32.zip ;; Tasmota Arduino Core 2.0.18 with IPv6 support, based on IDF 4.4.8
 platform_packages =
+
+;; espressif platform (optional - needs 300KB extra flash)
+;;; arduino-esp32 2.0.17 + esp-idf 4.4.7
+;; platform = espressif32@ ~6.13.0
+;; platform_packages =
+;;; arduino-esp32 2.0.14 + esp-idf 4.4.6
+;; platform = espressif32@ ~6.6.0
+;; platform_packages = platformio/framework-arduinoespressif32 @ 3.20014.231204
+
 build_unflags = ${common.build_unflags}
 build_flags = -g
   -Wshadow=compatible-local ;; emit warning in case a local variable "shadows" another local one

wled00/util.cpp

@@ -1296,6 +1296,9 @@ String computeSHA1(const String& input) {
 
 #ifdef ESP32
 #include "esp_adc_cal.h"
+#if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(4,4,7) // backwards compatibility patch
+  #define ADC_ATTEN_DB_12 ADC_ATTEN_DB_11
+#endif
 String generateDeviceFingerprint() {
   uint32_t fp[2] = {0, 0}; // create 64 bit fingerprint
   esp_chip_info_t chip_info;