ESp32 ESP-Wroom-32U External Antenna Module

The ESP-WROOM-32U is a Wi-Fi and Bluetooth module based on the ESP32 chip, designed specifically to support an external antenna. This module offers dual-core processing, a range of peripheral interfaces, and low-power consumption modes, making it ideal for IoT applications that require enhanced wireless performance with an external antenna.

Key Specifications for ESP-WROOM-32U

General Specifications

1. Module Type: Wi-Fi + Bluetooth (BLE) module with external antenna support
2. Chipset: ESP32-D0WD (by Espressif Systems)
3. Antenna: U.FL connector for external antenna
4. Flash Memory: 4 MB (32 Mbit) standard, with options for larger sizes

Wireless Specifications

1. Wi-Fi Standard: 802.11 b/g/n (2.4 GHz band)
2. Wi-Fi Data Rate: Up to 150 Mbps
3. Bluetooth Version: Bluetooth v4.2 (supports BLE and Classic Bluetooth)
4. Frequency Range: 2.4 GHz to 2.5 GHz
5. Output Power: Up to +20 dBm for Wi-Fi, +9 dBm for Bluetooth

Electrical Characteristics

1. Operating Voltage (V_CC): 3.0 V - 3.6 V (typically 3.3 V)
2. Power Consumption:
3. Deep Sleep Mode: ~10 µA
4. Light Sleep Mode: ~0.8 mA
5. Modem Sleep: ~10 mA
6. Transmit Mode (Wi-Fi active): ~160 - 260 mA (depending on RF power)
7. Current Draw in Active Mode: ~80 mA (average, with Wi-Fi on and transmitting)
8. Operating Temperature: -40°C to +85°C

Processing and Memory

1. Processor: Dual-core Tensilica LX6 CPU, up to 240 MHz
2. SRAM: 520 KB
3. Flash Memory: 4 MB (standard; larger variants available)
4. RTC Memory: 16 KB (low-power clock and state retention during deep sleep)

Interfaces

1. GPIO Pins: Up to 34 GPIOs, with multiple functionality options (some multiplexed)
2. Communication Protocols:
3. UART: Up to 3 (2 typically accessible)
4. SPI: 2 interfaces
5. I2C: 2 interfaces
6. PWM: 16 channels
7. ADC: 18 channels, 12-bit resolution
8. DAC: 2 channels, 8-bit resolution
9. I2S, CAN, RMT (Remote Control): Available on selected pins
10. Touch Capacitive Sensing Pins: Up to 10

Security Features

1. Hardware Accelerators: AES, SHA, RSA for encryption and authentication
2. Secure Boot and Flash Encryption: Supported, with OTA update capability

Pinout Highlights

1. Power Pins: VCC (3.3 V), GND
2. GPIOs and Multi-function Pins: GPIO0-GPIO39, with dedicated pins for UART, ADC, PWM, and other peripheral functions
3. Antenna Connector: U.FL connector for an external antenna
4. Reset and Enable Pins: EN (chip enable) and RST

Key Features

1. External Antenna Support: Via U.FL connector for longer-range Wi-Fi applications
2. Dual-Core Processor: Handles high processing loads and multitasking effectively
3. Flexible Power Modes: Supports deep sleep, light sleep, and modem sleep for low-power applications
4. Comprehensive Wireless Support: Dual-mode Wi-Fi and Bluetooth for versatile connectivity
5. Rich Peripheral Set: ADC, DAC, PWM, SPI, I2C, UART, and more for broad application versatility

Applications

The ESP-WROOM-32U is widely used in:

1. IoT and smart home devices with extended range requirements
2. Wearable electronics
3. Industrial automation and sensor networks
4. Bluetooth-enabled control systems
5. Portable and battery-operated devices