Chengdu Ebyte Electronic Technology Co., Ltd.
E22-400T22S1C User manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
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5.6 AUX description
AUX Pin can be used as indication for wireless send & receive buffer and self-check.
It can indicate whether there are data that are not sent yet via wireless way, or whether all wireless data has been sent
through UART, or whether the module is still in the process of self-check initialization.
5.6.1 Indication of UART output
To wake up external MCU
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.
