The Perfect Balance Between Quality & Affordability

esp32MX-E is a versatile ESP32 board with support for Ethernet and USB Type C, among other features. It is designed with ease-of-integration in mind, so you can use it to simplify and accelerate the development of your own custom boards. We have been designing and manufacturing electronic boards and modules for over 15 years, and that experience has allowed us to minimize cost, reduce risk, and ensure long-term availability by using standard, high-quality components from well-known manufacturers.

Advanced Power Supply

The esp32MX-E has an advanced power supply circuit that accommodates multiple inputs, provides 3.3 V and 5 V outputs, and delivers over 2 A of current to the user. It has high current switch mode regulators, at both 3.3 V and 5 V, to ensure low power consumption and high efficiency. Power can be supplied via the USB C connector, a 2.1 mm barrel connector, or the external power supply pin. This allows board designers to integrate the esp32MX-E as a daughterboard and get 3.3 V, 5 V, and supply voltage via the pin header connector.

Integration into Custom Hardware

Designed both for standalone use and for integration into larger projects, esp32MX-E has two female headers, so you can plug a small expansion board into it or use esp32MX-E itself as a daughterboard. All connectors, switches and LEDs are on one side of the board, which makes it far easier to design custom enclosures.

We supply raised male headers, for when esp32MX-E is in use a daughterboard, that provide 14.5 mm of space between it and the baseboard. A single board spacer and a screw are all you need for a secure fit, and we provide both a threaded and a non-threaded 14.5 mm spacer. Two additional screw holes are available, but are not required when using esp32MX-E as a daughterboard.

Reliability

Capacitors, in particular, are often the cause of failure in electronic devices. We have sourced the capacitors in esp32MX-E from extremely reputable manufacturers like Panasonic, Samsung, Murata, TDK, and Yageo. Furthermore, all of our capacitor voltages are overrated by at least 190%.

Customizable Enclosure

We provide the Eagle Schematics and PCB files for a prototype daughterboard and enclosure faceplate. You can use these design files to quickly develop your own custom product.

User I/O

esp32MX-E has a secondary 32-bit ARM processor (STM32F030F4) that serves by default as an I²C port expander. If required, you can program this secondary microcontroller with custom firmware.

Current & Future Models

We also offer an industrial version of this board that will operate within a temperature range from -40°C to +85°C. And, though it will not be part of this campaign, we are currently in the process of designing esp32MX-EP. It will be the same size and have the same connectors as the esp32MX-E, but will swap out the SD card reader in favor of IEEE 802.3at-compliant Power-over-Ethernet (PoE) support.

Features & Specifications

• esp32 Module
  • 32-bit LX6 microprocessor operating at 160 or 240 MHz
  • 4 MB Flash
  • 520 KB SRAM
• Storage: Micro SD card slot
• Wi-Fi: 802.11 b/g/n
• Bluetooth: v4.2 BR/EDR & BLE
• USB: Type C connector
  • Virtual COM port via USB
  • Programmable via USB
  • Power via USB
• User I/O:
  • 22 pins of which 4 are inputs only.
  • Four 5 V tolerant I/O pins
  • Not all I/Os are available when the SD Card is used
  • Programmable pull-up and pull-down resistors on most inputs
• Secondary Processor: I²C I/O expander implemented with a user programmable STM32F030F4
• Expansion Pin Headers: Two standard 2.54 mm (0.1") expansion pin headers
  • One with 14 pins (2x7)
  • One with 20 pins (2x10)
• Power Supply: Switch Mode
  • 5 V, over 2 A of current for user applications
  • 3.3 V, over 2 A of current for user applications
• Power Sources:
  • USB Type C connector
  • 2.1 mm barrel connector
  • Vx external power supply pin
• Supply Voltage: 4.5 V to 16 V (via 2.1 mm Barrel connector or Vx pin)
• Operating Temperature:
  • Standard version: 0° C to 85° C
  • Industrial version: -40° C to 85° C
• Physical Controls:
  • User LED
  • Button
• Compact Size: 64.4 mm x 42 mm (2.54" x 1.65")
• Enclosure: Optional

Comparison Table

Support & Documentation

You will find most of the esp32MX-E documentation in our GitHub repository. If you have a technical question, you can reach out to us here. For inquiries related to orders and shipping, please contact Crowd Supply.

Manufacturing Plan

We have been using the same PCB contract assembler in Taiwan and China for over 10 years, and you can be assured of an extremely high-quality, well-assembled product! We aim to have the first batch of boards finished by late December or early January. The exact quantity in any given batch will depend on demand.

Risks & Challenges

Honestly, there’s not a lot that could go wrong. We have been doing this for many, many years. esp32MX-E is very similar to our SBC65EC and SBC66EC boards, which we’ve been selling for over 10 years. The most likely risk would involve delivery being a week or two late due to unforeseen circumstances like high demand, courier delays, or customs headaches.

Fulfillment & Logistics

During the campaign, products will be supplied and shipped by Crowd Supply. (For more information, please see their ordering, paying, and shipping guide.) After that period, products will be available at www.modtronix.com and from many of our distributors, including Mouser.