Single-point wake-up: In the system sleep mode, the wake-up object can be uniquely specified without requiring all receivers to exit the sleep mode, which can greatly save system power consumption. It is especially suitable for battery power supply, Bluetooth Module which can save the power consumption of the networking system to the greatest extent, so in a sense, single-point wake-up is the best choice for low-power mode.The wireless serial port module (UART) developed by Chengdu Ebyte based on SEMTECH's SX1212 radio frequency chip - E33-433T13D has a single-point wake-up function (the only designated wake-up object serial module without all receivers exiting the sleep mode), and supports transparent transmission. Works in the 425-440.5MHz frequency band (default 433MHz), ultra-low receiving current, supports TTL level output, advanced ultra-narrowband GFSK modulation method, compatible with 3.3V and 5V IO port voltage.3. How to enter single-point wake-up (specified wake-up during sleep) modeFirst of all, the module has four working modes, which are set by pins M0 and M1; the details are shown in the following table:Serial port open, wireless open, transparent transmissionReceiver must be mode 0, 1Serial open, wireless openThe only difference from mode 0: before the data packet is transmitted, the wake-up code is automatically added, so as to wake up the receiver working in mode 2The serial port receiving is closed, and the wireless is in the air wake-up mode. After receiving the wireless data, open the serial port to send data.The module goes to sleep and can receive parameter setting commands***Users can combine M0 and M1 with high and low levels to determine the working mode of the module. The 2 GPIOs of the MCU can be used to control the mode switching; when M0 and M1 are changed: the module is idle, and after 1ms, it can start working in the new mode; if the module has serial port data that has not been transmitted wirelessly, after the transmission is completed, can enter the new working mode; if the module receives the wireless data and sends out the data through the serial port, it needs to send the data to enter the new working mode; so the mode switch can only be valid when the AUX output is 1, otherwise it will be delayed switch.
