Simple LoRa2Cat.1 Gateway

The current version 1.0V
documentation has been uploaded as an attachment. Please leave a message at the bottom if you have any questions.
Project Introduction:

This project primarily receives node signals via serial LoRa (ATK-LoRa-01) and forwards the data packets to the FS800E 4G module via an STM32G0 chip, enabling data uploading to the cloud.
It features a 1.3-inch OLED screen displaying the current data status between the node and the cloud, showing the current date and time, and internally using an RTC for timekeeping, allowing for scheduled time updates when necessary.
Three onboard LEDs indicate power, operation, and communication status. A reset button and a debug download interface are also included.

The biggest advantage of this project is that it allows for rapid transmission of node data packets to the cloud with almost no coding required. Its simplicity makes it convenient.
Features:

The serial LoRa module enables data reception and transmission.
The 4G module can be configured via a host computer in various modes, such as TCP, UDP, and MQTT.
The screen displays date parameters and communication status.
It is compatible with industrial control enclosures to protect the screen and communication unit. Instructions for Use:

Configure the LoRa parameters and the MQTT parameters of the 4G module before use.
Plug in the power, wait to acquire the date and time parameters, and set the RTC timekeeping.
Receive LoRa signals and forward them to the 4G module; data packets are transmitted to the cloud via the MQTT protocol.

Physical Demonstration
Precautions
: 1. When soldering, pay attention to the soldering order to ensure the power supply is correct and to avoid burning out subsequent circuits! The soldering order should follow the principle of from shortest to smallest, and from inside to outside.
2. The circuit has been verified. Solder according to the component parameters in the schematic diagram. It is recommended to solder the power supply first, and only solder other peripheral components after confirming that everything is correct.
3. When using board cleaning fluid, be careful not to touch the buttons, as corrosion will make them difficult to use.
4. It is recommended to use the schematic diagram parameters; the BOM may contain errors.
Acknowledgements:
Thank you for your patience in reading. Given my limited technical skills, if there are any omissions or errors, please provide your valuable feedback.