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ESP32 WIFI+BLE Module (IPEX antenna)
ESP32-WROVER-B is a highly-integrated generic WiFi-BT-BLE-MCU module with steady performance and low power consumption. It features an IPEX antenna, a 4MB...
ESP32-WROVER-B is a highly-integrated generic WiFi-BT-BLE-MCU module with steady performance and low power consumption. It features an IPEX antenna, a 4MB external SPI flash and 64-Mbit SPI PSRAM that operates at 3.3V. The module targets a wide variety of applications from low power sensor networks to the most demanding tasks, such as voice encoding, music streaming, and MP3 decoding.
This module employs the ESP32-D0WD chip of ESP32 series and also combines 2.4GHz WiFi and dual-mode Bluetooth. There are two CPU cores that can be individually controlled, and the CPU clock frequency is adjustable from 80MHz to 240 MHz. The user may also power off the CPU and make use of the low-power co-processor to constantly monitor the peripherals for changes or crossing thresholds. ESP32 integrates a rich set of peripherals, including capacitive touch sensors, Hall sensors, SD card interface, Ethernet, high-speed SPI, UART, I2C, and I2S.
The integration of Bluetooth, Bluetooth LE and WiFi ensures that a wide range of applications can be covered: using WiFi allows a large physical range and direct connection to the Internet through a WiFi router while using Bluetooth allows the user to conveniently connect to the phone or broadcast low energy beacons for its detection. The sleep current of the ESP32 chip is less than 5 µA, making it suitable for battery-powered and wearable electronics applications. The module supports a data rate of up to 150 Mbps, and 20 dBm output power at the antenna to ensure the widest physical range. As such the module does offer industry-leading specifications and the best performance for electronic integration, range, power consumption, and connectivity.
The operating system chosen for ESP32 is freeRTOS with LwIP; TLS 1.2 with hardware acceleration is built-in as well. Secure (encrypted) over the air (OTA) upgrade is also supported so that users can upgrade their products even after their release.
Dimension Diagram
SPECIFICATION
Certification
- RF Certification: FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC
- Bluetooth Certification: BQB
- Green Certification: RoHS/REACH
Test
- Reliability: HTOL/HTSL/uHAST/TCT/ESD
Wi-Fi
- Protocols: 802.11 b/g/n (802.11n up to 150Mbps)
A-MPDU and A-MSDU aggregation and 0.4µs guard interval support
- Frequency Range: 2.4GHz ~2.5GHz
Bluetooth
- Protocols: Bluetooth v4.2 BR/EDR and BLE specification
- Radio: NZIF receiver with-97 dBm sensitivity
Class-1, class-2 and class -3 transmitter AFH
- Audio: CVSD and SBC
Hardware
- Module Interface: SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC
- On-chip Sensor: Hall sensor
- Integrated Crystal: 40 MHz crystal
- Integrated SPI Flash: 4MB
- Integrated PSRAM: 8MB
- Operating Voltage/Power Supply: 2.7V~3.6V
- Minimum Current Delivered by Power Supply: 500mA
- Recommended Operating Temperature Range: –40°C~65°C
- Package Size: (18.00±0.10)mm×(31.40±0.10)mm×(3.30±0.10)mm
DOCUMENTS
Jargon buster
Plain-language definitions for the technical terms used above.
- 2.4GHz WiFi
- 2.4GHz WiFi is the common wireless network band used by many routers and embedded devices. It matters here because the module can use WiFi for firmware updates, separate from its Bluetooth serial function.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- BLE
- BLE stands for Bluetooth Low Energy, a Bluetooth mode designed for lower power use and modern phone compatibility. It matters because BLE support can make the module easier to use with Apple devices and battery-powered projects, though it may behave differently from classic serial Bluetooth.
- DAC
- A digital-to-analogue converter turns numbers from the microcontroller into a real analogue voltage. It matters if you want to generate simple waveforms, audio-style signals, or variable control voltages rather than just on/off outputs.
- ESP32
- ESP32 is a family of microcontroller modules with built-in wireless features such as Bluetooth and WiFi. Knowing this product uses an ESP32-based module helps explain how it provides wireless serial communication and firmware update features.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- I2S
- I2S is a digital audio interface used to send sound data between chips, such as from a microcontroller to an audio amplifier or DAC. It matters if your project needs cleaner digital audio output than a basic buzzer or PWM signal can provide.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- OTA
- OTA means over-the-air updating, where firmware is updated wirelessly instead of through a programming cable. It matters because you may be able to update or maintain the module after it is installed in a project.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
- RF
- RF means radio frequency, referring to signals used for wireless communication and other high-frequency electronics. A low-noise, stable power supply is important for RF circuits because power noise can affect signal quality and measurements.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
- UART
- UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.
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