Chengdu Ebyte Electronic Technology Co.,Ltd.
E280-2G4T12S User Manual
Copyright ©2012–2021
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Chengdu Ebyte Electronic Technology Co.,Ltd.
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the new working mode; so the mode switch can only be effective when AUX outputs 1, otherwise it will Delay switching.
For example: In mode 3, the user continuously inputs a large amount of data and performs mode switching at the same time. At
this time, the switching mode operation is invalid; the module will process all user data before performing a new mode detection;
therefore, the general recommendation is : Detect the output status of the AUX pin, wait 2ms after the AUX output is high, and
then switch.
When the module is switched from another mode to the configuration mode, if there is data that has not been processed; the
module will process these data (including receiving and sending) before entering the sleep mode. This feature can be used for
fast sleep, thereby saving power consumption; for example: the transmitter module works in mode 0, the user initiates serial data
"12345", and then does not need to wait for the AUX pin to be idle (high level), and can directly switch to sleep mode. And the
user's main MCU will go to sleep immediately, and the module will automatically send all user data wirelessly, and then
automatically go to sleep within 1ms; thereby saving MCU working time and reducing power consumption.
In the same way, any mode switching can use this feature. After the module processes the current mode event, it will
automatically enter the new mode within 1ms; thus eliminating the need for users to query AUX and achieving the purpose of
fast switching; For example, switching from the transmitting mode to the receiving mode; the user MCU can also go to sleep
before the mode switching, and use the external interrupt function to obtain the AUX changes, thereby performing the mode
switching.
This operation mode is very flexible and efficient. It is designed according to the user's MCU operation convenience, and can
reduce the workload of the entire system as much as possible, improve system efficiency, and reduce power consumption.
6.2 Transmission mode (mode 0)
In this mode, data can be transparently transmitted, that is, what data the sender sends and what data the receiver will receive. In
the normal mode, as long as the airspeed, address and channel of the two modules are the same, the two modules can perform
normal transparent transmission; in the continuous transmission mode, it is necessary to ensure that the baud rates of the two
modules must be the same to ensure that the two modules have the same baud rate. Transparent transmission of each module,
continuous transmission mode supports continuous transmission of large files at baud rates of 1200-115200.
6.3 RSSI mode (mode 1)
In this mode, the module will output the RSSI value of the current 2.4GHz signal in the air at 100ms intervals to detect the
channel quality in the air. The output value is in hexadecimal complement format.
6.4 Ranging mode (mode 2)
In this mode, the master module will output the distance between the current master and slave, and the output
format is MODE:x+RANG:value. For example, "MODE:A+RNG:365" means that in the high-precision mode, the
measurement distance is 365m; "MODE:L+RNG:667" means that in the long-distance mode, the measurement distance
is 667m.
note:
1. After the module is powered on, it enters the ranging mode, and the hardware parameter calibration and software
algorithm parameter analysis are automatically carried out between the master and slave devices. There will be a waiting
period of about 5s during this period.
