to build special Tasmota versions with Compiler switches defined in [env:tasmota-xyz] in `platformio_tasmota_cenv.ini` to control
user_config_override.h
Example:
"[env:tasmota-zigbee]
build_flags = ${common.build_flags} -DHANS_CONFIG_ZIGBEE=true"
which referrs to in user_config_override.h
```#ifdef HANS_CONFIG_ZIGBEE // ******************************************************************
#undef CODE_IMAGE_STR
#define CODE_IMAGE_STR "ZIGBEE"
#define USE_WEBSERVER // Enable web server and Wifi Manager (+66k code, +8k mem)
#define USE_JAVASCRIPT_ES6 // Enable ECMAScript6 syntax using less JavaScript code bytes (fails on IE11)
// #define USE_WEBSEND_RESPONSE // Enable command WebSend response message (+1k code)
//#define USE_RULES // Add support for rules (+4k4 code)
// #define USE_EXPRESSION // Add support for expression evaluation in rules (+3k2 code, +64 bytes mem)
// #define SUPPORT_IF_STATEMENT // Add support for IF statement in rules (+4k2 code, -332 bytes mem)
// #define SUPPORT_MQTT_EVENT // Support trigger event with MQTT subscriptions (+3k5 code)
//#define USE_SCRIPT // Add support for script
// #define USE_SCRIPT_FATFS 4 // Add support for script storage on SD card (+12k code, +4k mem)
// #define USE_SCRIPT_WEB_DISPLAY
#define USE_ADC_VCC // Display Vcc in Power status. Disable for use as Analog input on selected devices
// -- Zigbee interface ----------------------------
#define USE_ZIGBEE // Enable serial communication with Zigbee CC2530 flashed with ZNP (+35k code, +3.2k mem)
#define USE_ZIGBEE_PANID 0x1A63 // arbitrary PAN ID for Zigbee network, must be unique in the home
#define USE_ZIGBEE_EXTPANID 0xCCCCCCCCCCCCCCCCL // arbitrary extended PAN ID
#define USE_ZIGBEE_CHANNEL 11 // Zigbee Channel (11-26)
#define USE_ZIGBEE_PRECFGKEY_L 0x0F0D0B0907050301L // note: changing requires to re-pair all devices
#define USE_ZIGBEE_PRECFGKEY_H 0x0D0C0A0806040200L // note: changing requires to re-pair all devices
#define USE_ZIGBEE_PERMIT_JOIN false // don't allow joining by default
#define USE_ZIGBEE_COALESCE_ATTR_TIMER 350 // timer to coalesce attribute values (in ms)
#endif ```