ESP32_SW High Supply Voltage Breakout and Development Board

ESP32_SW High Supply Voltage Breakout and Development Board

ESP32U Dev Board WiFi+Bluetooth with Onboard Swith Mode Regulator,  USB to Serial. Arduino Programmable.  Ideal for use in 12V and 24V systems.

This ESP32 development board has an integrated Swith Mode Regulator with a 5V 200mA output to power external peripherals. The 3.3V regulator has excess capacity to power peripherals.  Other than the ESP32D module it has a CH9102F USB to Serial converter, A 3.3V LDO, Reset and Flash Switches and a multi color LED.

The switching regulator is rated for a 40V input and can be used in automobiles without additional protection circuits.  The 5V output can supply at least 200mA to power 5V devices such as NeoPixels.

Please note that the high voltage input is labeled Vhi.  Tying high voltage to the Vin pins will destroy the board.  The high voltage input is on the left side of the board near the inductor.

The board uses the latest ESP32-WROOM-32E module .

The Deep Sleep current is less than 1400uA and depends on the input voltage.

There are two tri-color LEDs on the board. One has the red and green LEDs hooked up to the CH9102F to signal transmit and receive activity and is powered from the USB connector. The other tri-color LED is connected to three IO pins on the ESP32 module.

The board supports auto-download from the Arduino environment and will automatically be set in download mode by the downloader. Once the download is complete the board will be reset, just like a normal Arduino board.

All the required capacitors and pull-up resistors are fitted on the board. The board can be powered from an external power supply of up to 40V or the USB connector or both.

This board fits on a breadboard and has one row of pins accessible on each side of the board. Most of the pins of the ESP32 module are available on the external pins.

The module can be programmed directly from the Arduino environment without pushing any buttons. The upload speed is 921600 bps.

The module has been designed to be used in Sleep mode without excessive current draw.  I read less than 10uA on the 3.3V bus with the processor in deep sleep mode.  The switch mode regulator has a low quescient current and draws 1400uA  when powered with 12V from the Vhi and Gnd pins with the processor in deep sleep mode.

The overall dimensions and pinout is identical to the other ESP32 boards on this site.

The schematic is available here.

• 7V to 40V operating voltage
• 240 MHz dual core Tensilica LX6 microcontroller with 600 DMIPS
• Integrated 520 KB SRAM
• Integrated 802.11BGN HT40 Wi-Fi transceiver, baseband, stack and LWIP
• Integrated dual mode Bluetooth (classic and BLE)
• 4 MByte flash
• On-board PCB antenna
• 3 x UARTs, including hardware flow control
• 3 x SPI
• 2 x I2S
• 12 x ADC input channels
• 2 x DAC
• 2 x I2C
• PWM/timer input/output available on every GPIO pin
• SDIO master/slave 50 MHz
• Supports external SPI flash up to 16 MB
• SD-card interface support
• Made in and ships from the USA