'scons' is not recognized as an internal or external command,

RT-Thread Studio 串口 Env LWIP SPI Bootloader AT Hardfault CAN总线 ART-Pi FinSH DMA USB 文件系统 RT-Thread SCons RT-Thread Nano 线程 MQTT STM32 FAL RTC rt-smart I2C_IIC UART cubemx BSP ESP8266 PWM ota在线升级 WIZnet_W5500 packages_软件包 flash freemodbus GD32 潘多拉开发板_Pandora ADC 编译报错 keil_MDK 定时器 flashDB ulog socket rt_mq_消息队列_msg_queue msh 中断 Debug SFUD C++_cpp at_device