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，
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6.4 Setting Mode
（
Mode2
）
Type
When M0 = 0
，
M1 = 1, module working in module1
transmission
No wireless transmission is allowed, the received serial data will be discarded.
receiving
Unable to receive wireless data
configuration
Can be used for module parameter setting, use serial port 9600, 8N1, set module working
parameters according to specific instruction format
When entering from the setting mode to other modes, the module will reconfigure the
parameters. During the configuration, AUX remains low level;
It outputs a high level after finished, so it is recommended that the user detect the rising edge
of AUX.
6.5 Sleep Mode
（
Mode3
）
Type
When M0 = 1
，
M1 = 1
，
module working in module3
transmi
ssion
Unable to transmit wireless data
receivi
ng
Unable to receive wireless data
others
When the module is in the ultra-low power state, all other functions of are turned off, and the sleep
mode can only be exited through the state switch of M1M0.
6.6 Fast communication test
Step
Specific operation
1
Connect E49-400T20S module to the E49-TBL test board, and then plug into the USB test board (E15-USB-T2),
plug into the computer to ensure that the driver has been installed correctly;
Plug in the mode selection jumper cap on the USB test board ( M1 = 0, M0 = 0),
2
Select 5V (the module supports 2.6 ~ 5.5V).
3
Run the "Serial Debug Assistant" software and select the correct serial port number and observe the sending
window and the corresponding receiving window
