SX1276 Wireless Module User Manual of E32(915T30S)
Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 7 / 14
2.6.4 Notes for AUX
For function 1 & function 2 mentioned above, the priority should be given to the one with low level output, which means if it meets
each of any low level output condition, AUX outputs low level, if none of the low level condition is met, AUX outputs high level.
When AUX outputs low level, it means the module is busy & cannot conduct operating mode checking. Within 1ms since AUX
outputs high level, the mode switch will be completed.
After switching to new operating mode, it will not work in the new mode immediately until AUX rising edge lasts for 2ms. If AUX
stays on the high level, the operating mode can be switched immediately.
When the user switches to other operating modes from mode 3 (sleep mode) or it’s still in reset process, the module will reset user
parameters. During it, AUX outputs low level.
3.
Operating Mode
The table below shows the status of M1 & M0 and the corresponding modes: •
Mode（0-3）
M1
M0
Mode introduction
Remark
Mode 0
Normal
0
0
UART and wireless channel are open. Transparent transmission is on
The receiver must work in
mode 0 or mode 1
Mode 1
Wake-up
1
0
UART and wireless channel are open. The difference between
normal mode and wake-up mode is that it will add preamble code
automatically before data packet transmission so that it can awaken
the receiver works in mode 2
The receiver can work in
mode 0, mode 1 or mode 2
Mode 2
Power-saving
0
1
UART is disabled. Wireless module works at WOR mode (wake on
radio). It will open the UART and transmit data after receiving the
wireless data
1. The transmitter must
work in mode 1
2. Transmitting is not
allowed in this mode
Mode 3
Sleep
1
1
Parameter setting
More in working parameter
3.1 Mode Switch
The user can decide the operating mode by the combination of M1 and M0. The two GPIOs of MCU can be used to switch mode.
After modifying M1 or M0, it will start to work in new mode 1ms later if the module is free. If there are any serial data that are yet to
finish wireless transmitting, it will start to work in new mode after the UART transmitting finished. After the module receives the
wireless data & transmits the data through serial port, it will start to work in new mode after the transmitting finished. Therefore,
