Ebyte E28-2G4T27SX, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co.,Ltd. E28-2G4T27SX User Manual
Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.
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5.6.2 Indication of wireless transmission

Under sub-packet transmission mode, the internal buffer size is determined by the sub-packet size, if the packet length is 221
bytes, then the buffer size will be 2048 bytes, when AUX=1, user could continuously initiate transmitting of no more than
2048 bytes.

Under continuous transmission mode, AUX=1 means the module is busy, but it is not applicable for waking up external
MCU, because the data transmission is very quick under continuous transmission mode.

AUX=1 means all serial data is transmitted through RF, and the module is at idle state.
5.6.3 Module in configuration process

Only occurs when resetting or when exiting sleep mode
6. Operation Modes
The module has 4 operation modes, which are determined accordingly by pins M0, M1. Please refer to below instructions:
6.1. Mode Switch

User could determine the module operation mode through the combination of high-low level of M2, M1 and M0. Mode
switch can be controlled through the GPIO of the MCU.

When M2, M1 and M0 changed and the module is in idle state (AUX at high level), it can starts to work normally under new
Mode （ 0-3 ） M2 M1 M0 Introduction Remarks
0 - Transmission Mode 1 0 0
Serial port on, RF on, continuous
transparent transmission
The air data rate can be manually configured and
automatically adjusted along with baud rate values
；
the baud rates on both sides must be the same under
continuous transmission mode
1 - RSSI Mode 1 0 1 Serial port on, RF on, RSSI on
The module outputs RSSI value through serial port
every 100ms
2 – Ranging Mode 1 1 0 Reserved -
3 - Configuration
Mode
1 1 1
Serial port on ， RF off, parameter
configuration
Baud rate is fixed as 9600 8N1
4 -Low power 0 x x
lowest power consumption in low power
mode
When M2 is set high, it is in normal working
condition.
when M2 is set low, it is in low power mode