Maybe you can help a try with the latest RTOS AT. https://github.com/espressif/esp-at

Could these UART examples help? https://github.com/espressif/ESP8266_RT ... eripherals

Could these examples help？https://github.com/espressif/ESP8266_RTOS_SDK/tree/master/examples/protocols

Try the "ESP32&ESP8266&ESP32S2 RF Performance Test Demonstration" https://www.espressif.com/en/support/do ... ther-tools. It should able to pass the CE certification.

If unfortunately not, submit an issue on the website. https://www.espressif.com/en/contact-us ... -inquiries

用新版的 RTOS 试试呢？https://github.com/espressif/ESP8266_RTOS_SDK/tree/master/examples/protocols

Is it a new project? If it is, maybe you can try the new ESP-AT. https://github.com/espressif/esp-at

文档里好像是 107 byte 改成 0xFF ？ https://www.espressif.com/sites/default ... nce_cn.pdf

See https://github.com/espressif/ESP8266_RT ... s/freertos ?

Maybe you can have a try with the "ESP32&ESP8266&ESP32S2 RF Performance Test Demonstration" https://www.espressif.com/en/support/do ... ther-tools

Could this example help? https://github.com/espressif/ESP8266_RT ... power_save