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Chapter 4 Basic Product Use Introduction
4.1 Product Use Details
Figure 5.1.1 Product Physical Drawing
The hardware integrates ESP32-S3 and peripheral circuits, E22-400MM22S LoRa module and peripheral circuits,
power supply circuits, Li-ion battery charging circuits and power voltage detection circuits, OLED display
and peripheral circuits, TF card slot and peripheral circuits, reset button circuits and BOOT button circuits.
ESP32-S3 supports USB 2.0 interface protocol, connect the USB 2.0 interface to the computer USB can
automatically start installing the driver, after the installation is complete, there will be a USB serial
device (COM9), can be used for program download.
GPIO43 and GPIO44 are used as UART interfaces for log output or inter-serial communication, if you need a
computer to view the UART print log you need a TTL to USB tool.
Figure 4.1.2 Getting the port number
