Ebyte E22-400T30S - 5.6.2 Indication of wireless transmitting

Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T30S User manual
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5.6.2 Indication of wireless transmitting
Buffer (empty): the internal 1000 bytes data in the buffer are written to the RFIC (Auto sub-packaging). When AUX=1, the
user can input data less than 1000 bytes continuously without overflow. Buffer (not empty): when AUX=0, the internal 1000
bytes data in the buffer have not been written to the RFIC completely. If the user starts to transmit data at this circumstance, it
may cause overtime when the module is waiting for the user data, or transmitting wireless sub package.When AUX = 1, it does
not mean that all the UART data of the module have been transmitted already, perhaps the last packet of data is still in
transmission.