Chengdu Ebyte Electronic Technology Co., Ltd. E43-900T13S3 User manualCopyright ©2012–2019,Chengdu Ebyte Electronic Technology Co., Ltd.105.3.4 Notes for AUX For function 1 & function 2 mentioned above, the priority should be given to the one with low level output, whichmeans if it meets each of any low level output condition, AUX outputs low level, if none of the low level conditionis met, AUX outputs high level. When AUX outputs low level, it means the module is busy & cannot conduct operating mode checking. Within 1mssince AUX outputs high level, the mode switch will be completed. When the user switches to other operating modes from mode 3 (sleep mode) or it’s still in reset process, the modulewill reset user parameters, during which AUX outputs low level.6. Operating modeThe module has 4 operation mode, which decided by the status of M1 & M0. Below are the details:Mode(0-3) M1 M0 Description RemarkMode 0TransmissionMode0 0UART and wireless channel are open,,The module performsdata transmission and reception according to the settransmission mode.The transmissionmode of both sendersand receivers mustbe the same.Mode 1RSSI Mode 0 1 UART is open, the module will output the RSSI signal strengthvalue at 100ms timing.Relative strengthonlyMode 2ConfigurationMode1 0 The module can receive serial instructions, check instruction listfor details, fixed baud rate 9600, 8N1ParameterconfigurationMode 3Sleep Mode 1 1 The module enters sleep standby, and both the serial port andwireless are turned off.