Ebyte E29-T Series, User Manual

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Chengdu Ebyte Electronic Technology Co., Ltd. E29-400TXXX product data sheet
Copyright ©2012–2023
，
Chengdu Ebyte Electronic Technology Co.,Ltd. 14
1
For function 1 (5.6.1) & function 2 ( (5.6.2) mentioned above, the priority should be given to the one with low
level output, which means as long as any output low level condition is met, AUX will output low level; Only
when none of the output low level condition is met, AUX will outputs high level.
2
When AUX outputs low level, it means the module is busy & it won’t conduct working mode checking.
Within 1ms since AUX outputs high level, the module working mode switch will be completed.
3
After switching to new working mode, module will not work in the new mode immediately until AUX rising
edge lasts for 2ms.
If AUX is always at high level, then the mode switch will take effect immediately;
4
When the user switches to other working modes from mode 3 (sleep mode) or it is still in reset process, the
module will reset user parameters, during which AUX outputs low level.
5
Due to the characteristics of the ChirpIoT™ modulation method, the information transmission delay is much
longer than FSK. For example, at an air data rate of 1.2kbps, the transmission delay of 100 bytes is about 1.5
seconds.
To avoid communication abnormalities caused by data accumulation and data loss, customer is suggested not
to transmit large amounts of data at low air data rate.
Chapter 6 Working Mode
There are four working modes, which are set by M1 and M0, the details are as follows:
Mode
（
0-3
）
M1 M0 Description Remark
0 Transmission
Mode
0 0
UART and wireless channel are open, transparent transmission is
on
Support over-the-air
configuration via special
command
1 WOR Mode 0 1 Can be set as WOR Transmitter or WOR Receiver
Support wake up over the
air
2 Configuration
Mode
1 0
Users can access the registers through the serial port to control the
working status of the module
3 Deep Sleep
Mode
1 1 Module goes to sleep
6.1 Notes for Mode Switching
No. Remark
1

Users can combine high and low levels with M1 and M0 to determine the module’s working mode. Two GPIOs of the
MCU can be used to control mode switching;

After changing M1 and M0: If the module is idle, after 1ms, it can start working according to the new mode;

If there is serial port data of the module not been transmitted through the wireless, the new working mode can be
switched after the transmission is completed;

If the module receives the wireless data and transmits the data through the serial port, it needs to finish transmission
before switching to the new working mode;

Therefore, mode switching can only be valid when AUX output is 1, otherwise it will delay switching
2

For example, users continuously inputs a large amount of data and simultaneously performs mode switching. At this
time, the switching mode operation is invalid; the module will process all the user data before performing the new mode
detection;

Therefore, the general recommendation is to detect the output state of the AUX pin and switch mode after 2ms when
AUX outputs high level.