Electrical parameters
Module power supply
ES1 supports 3.3V single power supply, and the module internally adopts DCDC mode to transform the 1.0V and 0.8V voltages required by the chip. The DCDC mode can effectively reduce the power consumption of the module, minimize the heat generation of the module and prolong the service life of the battery.
A 10uF capacitor and a 100nF capacitor decoupling need to be placed near the input power inlet of the ES1 module (PIN11 and PIN12 pins).
reset pin
The reset pin of ES1 is on PIN19 of the module, the reset signal is active low, after the module is powered up, please keep the reset signal low for 100us and then pull the reset signal high.
burner interface
The ES1 module uses the UART0 (PIN12, PIN13) interface to burn the program. The default baud rate of UART0 is 115200, and the RDtool software provided by the chip manufacturer is used for burning.
In order for the module to enter burn mode, it is necessary to connect the RESET of the ES1 module to the RTS pin of the computer's serial port, so it is necessary to select a serial-to-USB chip or module that supports the RTS pin to connect to the computer.
AT command interface
The UART1 (PIN17, PIN18) pins of the ES1 module are AT command interfaces, and the default baud rate of UART1 is 115200. You can input AT commands to configure the module or transmit data through the UART1 port.
For AT commands, refer to the AT Command Manual Documentation.