1. Introducción
The EoRa-S3-900TB is a versatile development board designed by EBYTE, integrating the powerful ESP32-S3FH4R2 chip with a LoRa module. This board is engineered for a wide range of applications requiring Wi-Fi, Bluetooth LE, and LoRa wireless communication capabilities. It features a compact design with essential peripherals for rapid prototyping and testing.
The ESP32-S3 is a low-power MCU system-on-chip (SoC) that supports 2.4 GHz Wi-Fi and Bluetooth LE wireless communication. The chip integrates a high-performance 32-bit LX7 dual-core processor, an ultra-low-power co-processor, Wi-Fi baseband, Bluetooth baseband, RF module, and peripherals up to 240 MHz. The ESP32-S3FH4R2 package includes 384 KB of ROM, 512 KB of SRAM, 16 KB of RTC SRAM, 4 MB of FLASH, and 2 MB of PSRAM.
Imagen: En ángulo view of the EoRa-S3-900TB Test Board, showcasing its compact form factor and various components.
2. Características principales
- Procesador: 32-bit LX7 dual-core processor, up to 240 MHz.
- Memoria: Integrated 4 MB FLASH and 2 MB PSRAM.
- Conectividad inalámbrica: Supports 2.4 GHz Wi-Fi (IEEE 802.11b/g/n) and Bluetooth LE (Bluetooth 5, Bluetooth mesh).
- Módulo LoRa: E22-900MM22S with SX1262 chip, supporting 850 ~ 930 MHz operating frequency and +22 dBm max output power.
- Mostrar: Integrated 0.96-inch OLED display.
- Almacenamiento: SD card slot for expanded storage.
- Administración de energía: Li-ion battery charging circuit with a rated charging current of 500mA.
- Interfaz: Type-C interface with USB 2.0 protocol for power and data.
- Antena: Common antenna for Wi-Fi and Bluetooth.
3. Especificaciones técnicas
| Especificación | Valor |
|---|---|
| Nombre del modelo | EoRa-S3-900TB |
| Marca | E-byte |
| Velocidad de la CPU | 240 MHz |
| Capacidad de almacenamiento de memoria | 6 MB (4MB FLASH + 2MB PSRAM) |
| Tecnología de conectividad | Bluetooth, wifi |
| Protocolos Wi-Fi | IEEE 802.11b/g/n (20 MHz and 40 MHz bandwidths) |
| Tarifas de datos de Wi-Fi | Up to 150 Mbps (1T1R mode) |
| Bluetooth LE Rates | 125 kbps, 500 kbps, 1 Mbps, 2 Mbps |
| Frecuencia LoRa | 850 ~ 930 MHz |
| LoRa Max Output Power | +22 dBm |
| OLED Display Size | 0.96 pulgadas |
| Corriente de carga de la batería | 500mA (rated) |
| Interfaz | Type-C (USB 2.0) |
4. Contenido del paquete
The EoRa-S3-900TB package typically includes the following components:
- EoRa-S3-900TB Development Board (with integrated Type-C interface, E22-900MM22S LoRa module, 0.96-inch OLED display, SD card slot, Li-ion battery charging circuit, and power circuit)
Image: The product packaging box, displaying manufacturer details and certifications.
5. Hardware Components and Pinout
The EoRa-S3-900TB board is designed with various accessible components and GPIO pins for development and testing. Below are diagrams illustrating the main components and the pin definitions.
Image: Detailed diagram of the EoRa-S3-900TB board highlighting key components and their functions, including the LoRa module, ESP32-S3 chip, and various interfaces.
5.1. Introducción de componentes
| NO | Hardware principal | Introducción de componentes |
|---|---|---|
| 1 | E22-400MM22S or E22-900MM22S | Ultra-small size independently developed by Chengdu Ebyte Electronics Co., Ltd. Based on the new generation of LoRa RF chip SX1262. E22-400MM22S and E22-900MM22S are produced by American Semtech and are suitable for 433MHz, 470MHz, 868MHz and 915MHz patch-type LoRa wireless modules. |
| 2 | ESP32-S3 chip | ESP32-S3 is a low-power MCU system-on-chip (SoC) that supports 2.4GHz Wi-Fi and Bluetooth LE wireless communication. |
| 3 | 3D omnidirectional antenna (Wi-Fi antenna) | Maximum gain 4.9dBi, 2.4G Wi-Fi omnidirectional antenna |
| 4 | IPEX seat (Wi-Fi antenna) | IPEX first generation socket, 2.4G Wi-Fi antenna |
| 5 | IPEX seat (LoRa antenna) | IPEX first generation seat, LoRa antenna |
| 6 | SMA radio frequency interface (LoRa antenna) | Full length 14.5mm SMA head, LoRa antenna |
| 7 | Tecla de reinicio | Botón de reinicio |
| 8 | cambiar | For completely disconnecting battery power |
| 9 | GPIO external interface | GPIO from ESP32 |
| 10 | GPIO external interface | UART serial port TXD |
| 11 | Interfaz de batería externa | SH 1.25mm, 2pin battery interface |
| 12 | LED de un solo color | Addressable RGB LED, driven by GPIO8 |
| 13 | LED bicolor | Charging indicator light, red when charging, green when fully charged |
| 14 | Pantalla OLED | Pantalla OLED de 0.96 pulgadas |
| 15 | tecla de arranque | Download button. Press and hold the Boot key and press the Reset key to enter the "firmware download" mode and download the firmware through the serial port. |
| 16 | USB download port | USB interface can be used as the power supply for the development board or the communication interface between PC and ESP32-S3 chip |
| 17 | Ranura para tarjeta TF | Short body TF card slot |
| 18 | Alfiler | All available GPIO pins (except the SPI bus of the flash) have been led to the pin header of the development board. Please see pin headers for more information. |
5.2. Definición de pin
Image: Diagram illustrating the pin layout and dimensions of the EoRa-S3-900TB board, crucial for connecting external components.
| NO | Nombre del pin | espigas de Tipo | Uso de pin |
|---|---|---|---|
| 1 | CCV | Fuente de alimentación | Power pin, can be used as 5V power output after normal power supply |
| 2 | Tierra | Fuente de alimentación | Energía GND |
| 3 | 3.3 VA | Fuente de alimentación | The power pin can be used as a 3.3V power output after normal power supply. It is not allowed to connect to 3.3V or other external power. |
| 4 | Tierra | Fuente de alimentación | Energía GND |
| 5 | GPIO42 | Entrada salida | - |
| 6 | GPIO46 | Entrada salida | - |
| 7 | GPIO41 | Entrada salida | - |
| 8 | GPIO40 | Entrada salida | - |
| 9 | GPIO39 | Entrada salida | - |
| 10 | U0RXD | Aporte | UART serial port RXD |
| 11 | U0TXD | Producción | UART serial port TXD |
| 12 | GPIO38 | Entrada salida | - |
| 13 | GPIO16 | Entrada salida | - |
| 14 | GPIO15 | Entrada salida | - |
| 15 | Primera vez | Entrada salida | Connect to ESP32-S3 reset pin |
| 16 | GPIO08 | Entrada salida | Connect to the reset pin of the LoRa module |
| 17 | GPIO12 | Entrada salida | - |
| 18 | GPIO48 | Entrada salida | - |
| 19 | GPIO47 | Entrada salida | - |
| 20 | GPIO35 | Entrada salida | Connect to DIO1 of LoRa module |
| 21 | GPIO34 | Entrada salida | BUSY connected to LoRa module |
| 22 | GPIO33 | Entrada salida | - |
| 23 | GPIO36 | Entrada salida | BOOT button connected to the base panel |
| 24 | GPIO37 | Entrada salida | LED connected to base plate |
| 25 | GPIO38 | Entrada salida | - |
| 26 | GPIO37 | Entrada salida | - |
6. Primeros pasos
6.1. Alimentación de la placa
The EoRa-S3-900TB can be powered via its Type-C USB port. Connect the board to a computer or a 5V USB power adapter using a standard Type-C cable. The board also supports Li-ion battery power, with an integrated charging circuit. Ensure the battery is connected to the external battery interface (SH 1.25mm, 2pin) if using battery power.
6.2. Descarga de firmware
To upload new firmware or programs to the ESP32-S3 chip:
- Connect the board to your computer via the Type-C USB download port.
- Mantenga pulsado el tecla de arranque (labeled 15 in the component introduction diagram).
- While holding the Boot key, briefly press the Tecla de reinicio (labeled 7).
- Release the Boot key. The board should now be in firmware download mode, ready to receive firmware via the serial port.
Image: The EoRa-S3-900TB board featuring its integrated 0.96-inch OLED display, which can be used for status indicators or data output.
7. Modos de funcionamiento
7.1. Wi-Fi Operating Modes
The ESP32-S3 supports various Wi-Fi operating modes:
- Infrastructure BSS Station mode (STA mode): The module acts as a client and connects to an existing Wi-Fi access point or router. In this mode, the module does not provide connections to other devices.
- SoftAP mode (AP mode): The module functions as a wireless access point, allowing other Wi-Fi devices to connect to it. It can establish TCP/IP-based server, client, and UDP connections, supporting up to 6 stations and up to 7 TCP Socket transmissions.
- Station + SoftAP mode: The module operates simultaneously as both a client (STA) and an access point (AP).
Image: Visual representation of the Wi-Fi operating modes (AP and STA) supported by the EoRa-S3-900TB board, illustrating how it can function as an access point or connect to an existing network.
7.2. Bluetooth LE Data Rates
The Bluetooth LE functionality supports multiple data rates, providing flexibility for various applications:
- 125 kbps
- 500 kbps
- 1 Mbps
- 2 Mbps
Image: Diagram illustrating the adjustable multi-level data rates for Bluetooth Low Energy (BLE) supported by the board, ranging from 125 Kbps to 2 Mbps.
8. Escenarios de aplicación
The EoRa-S3-900TB board is suitable for a wide array of applications due to its versatile connectivity and processing capabilities:
- Smart home and industrial automation
- Healthcare devices
- Smart agriculture systems
- Service robotics
- General Purpose Low Power IoT Sensor Hubs
- General Purpose Low Power IoT Data Loggers
- Audio devices and camera video streaming
- USB devices and consumer electronics
- Speech recognition and image recognition systems
- Wi-Fi + Bluetooth network cards
- Touch and proximity sensing applications
Imagen: Examples of diverse application scenarios for the EoRa-S3-900TB, including smart home, medical equipment, audio equipment, smart agriculture, service robots, and electronic products.
9. Solución de problemas
If you encounter issues with your EoRa-S3-900TB board, consider the following common troubleshooting steps:
- Sin energía: Ensure the Type-C cable is securely connected and the power source (USB port or adapter) is functional. If using a battery, check its charge level and connection.
- Error en la carga del firmware: Verify that the board is in download mode (Boot key pressed during reset). Check your serial port settings and driver installation on your computer.
- Problemas de conectividad Wi-Fi/Bluetooth: Ensure antennas are properly connected. Check your code for correct Wi-Fi credentials or Bluetooth pairing procedures. Verify that the module is operating in the correct mode (AP, STA).
- La pantalla OLED no funciona: Check connections to the OLED display. Ensure your code is correctly initializing and sending data to the display.
- Tarjeta SD no detectada: Ensure the SD card is inserted correctly into the TF card slot. Check your code for proper SD card initialization and file operaciones del sistema.
10. Mantenimiento
To ensure the longevity and optimal performance of your EoRa-S3-900TB board:
- Manténlo limpio: Regularly clean the board with a soft, dry brush or compressed air to remove dust and debris. Avoid using liquids or harsh chemicals.
- Tratar con cuidado: Avoid dropping the board or subjecting it to physical shocks. Handle by the edges to prevent damage to components.
- Almacenamiento adecuado: Guarde la tabla en un lugar fresco y seco, alejada de la luz solar directa y de temperaturas extremas. Utilice bolsas antiestáticas si la va a guardar durante periodos prolongados.
- Apagar cuando no esté en uso: Disconnect power when the board is not in use, especially if using battery power, to prevent unnecessary discharge.
11. Soporte y garantía
For technical support, documentation, or further inquiries regarding the EoRa-S3-900TB test board, please contact the manufacturer:
Fabricante: Tecnología electrónica Co., Ltd. de Chengdu Ebyte
Websitio: http://www.cdebyte.com/
For EU customers, the authorized representative is:
REPRESENTANTE DE LA UE: evalmaster Consulting GmbH
Bethaniestr. 30
60325 Fráncfort del Meno
Alemania
Please refer to the product packaging or purchase documentation for specific warranty terms and conditions.
