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[Pre-Order] ePulse Feather – Low Power ESP32 development board

$12.50

The ePulse Feather is currently available on pre-order. Order now and profit from more than 15% pre-order discount!
Update 2023/02/06: we expect to ship the boards by mid of March. The UART CH9102F takes longer to source. Thank you!

Low power ESP32 development board. The ePulse from ThingPulse is the perfect companion for your battery-powered projects.

  • 12-27uA in deep sleep
  • VIN: 3.3 – 6V
  • ESP32-WROVER-E
  • 8MB PSRAM
  • 8MB Flash
  • Access to 20 GPIO pins
  • LiPo charging circuit
  • Follows Adafruit Feather form factor specification
  • Includes male header pins (1×12 and 1×16)

Available on backorder

SKU: B0BSC1PVL4 Category: Tags: ,

Description

Low power ESP32 development board. The ePulse from ThingPulse is the perfect companion for your battery-powered IoT projects.

Technical Specifications

Microcontroller ESP32-D0WD-V3 or ESP32-D0WDR2-V3
ESP32 Module ESP32-WROVER-E-N8R8
Input Voltage (VIN pin) 3V3 – 6V
Power Consumption Deep Sleep ~12uA (at 3.3V), ~27uA (at 4.2V)
GPIO Pins 20
Flash 8MB (Quad SPI)
PSRAM 8MB (Quad SPI)
UART CH9102F
LDO

XC6220B33

Battery

TP4056 for LiPo
PH2.0-2PWB

Board Dimensions

50.8 x 24.4mm (PCB)
58.3 x 24.4mm (incl ESP32 + USB-C)

Optimized for Low Power Consumption

ePulse Feather, the low power ESP32 development board, is optimized for applications where a low sleep current and LiPo battery support is required. The VIN pin accepts voltages between 3V3 and 6V. When the ePulse board is in deep sleep it only consumes between 12uA (above 3.3V) and 27uA (below 3.3V). Most ESP32 and ESP8266 board consume around 100 – 130uA.

This low sleep consumption is perfect for applications where the device sleeps most of the time and only wakes up from time to time to complete a task. For instance, a WiFi remote control for home automation can sleep until the user presses one of the buttons. The device wakes up, connects to WiFi, sends the command over MQTT and goes back to sleep until the next time a button is pressed.

The ePulse Feather consumes between 12 – 27uA depending on the input voltage.

 

We also made sure that the integrated serial-2-usb chip is only consuming power when the device is powered through the USB port. Please note that to reduce standby power consumption this module comes only with a LED indicating charging status. No other status LEDs are included.

Ideal Form Factor for Prototyping

The size of the ePulse dev board is perfect to fit into a breadboard and leave one row of pins free for prototyping your circuit. We also took care that the dev board’s PCB doesn’t block the antenna of the ESP32 module. This leads to better signal strength for transmission and reception.

Easy Programming

The onboard UART CH9102F by WCH lets you easily program the ESP32 from your Windows, Mac or Linux computer. In our tests, we could use the highest transmission rates of 921600 bauds to re-program the chip within seconds. Regular ESP32 upload programs can automatically set the module into flashing mode.

Powerful ESP32 Module

This board takes advantage of the ESP32-WROVER-E module which breaks out many of the ESP32’s pins. It also comes with 8MB PSRAM which enables you to implement memory-hungry applications like embedded machine learning or using a graphics driver with a frame buffer. Please note that current software stacks might limit the PSRAM usage to 4MB. The WROVER-E module has passed several certification programs like FCC and CE. 

The ePulse development board gives you access to no less than 20 GPIO pins.

From Makers For Makers

We are makers and we want to make your life as easy and fun as possible. We often integrate our dev boards into other projects and we also design enclosures with the boards inside. That’s why we provide the 3D model of the board to you.

Documents

Additional information

Weight 0.012 kg
Dimensions 8 × 6 × 1 cm

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