WT32-ETH01 ESP32 Ethernet WiFi Bluetooth Module - Dual Networking

In this review of the WT32-ETH01 ESP32 module the bottom line is straightforward: this 2-pack is aimed at developers and integrators who need a compact, industrial-grade board that reliably bridges serial devices to Ethernet, WiFi or Bluetooth. The reviewer found the package especially useful where legacy serial equipment must be networked without redesigning hardware, since the module supports transparent serial-to-TCP/IP transmission, wired or wireless firmware updates, and an industrial operating range. For anyone building networked serial solutions, the WT32-ETH01 delivers practical connectivity and stable performance.

Key Features

• Dual-mode wireless: The onboard ESP32 SOC integrates 2.4GHz WiFi and Bluetooth so devices can connect over wireless networks or local links without extra radios.
• Serial to network bridge: The unit transparently transfers serial data to TCP/UDP networks, allowing traditional serial devices to be remotely accessed and managed.
• Wired Ethernet support: In addition to WiFi, the module supports wired network access for reliable, lower-latency connections in industrial installations.
• Industrial temperature range: Rated from -40 to +85 C, the board suits deployments that require extended environmental tolerance.
• Flexible firmware updates: Firmware can be upgraded over wired Ethernet or WiFi, simplifying maintenance for distributed devices.
• High baud support: The serial interface supports high speeds up to 5,000,000 baud for applications that need fast serial throughput.

Who It's For

The WT32-ETH01 is best for embedded developers, system integrators and technicians who need a compact module to add network connectivity to existing serial equipment or to prototype IoT gateways. Its combination of WiFi, Bluetooth and Ethernet access plus transparent serial forwarding makes it well suited to industrial monitoring, power metering integration and remote telemetry projects.

It is less appropriate for complete beginners who want plug-and-play consumer devices without firmware work or for projects that require pre-soldered header pins, as the modules are supplied without soldered pins and expect some hands-on assembly or PCB integration.

Pros & Cons

Pros

• Versatile networking: simultaneous options for WiFi, Bluetooth and wired Ethernet provide deployment flexibility.
• Transparent serial-to-TCP/IP stack simplifies integration of non-networked devices into modern networks.
• Industrial-grade temperature range and stable ESP32 performance for reliable field use.
• Supports high serial baud rates and multiple serial ports for demanding applications.

Cons

• Modules arrive without soldered pins, so users must solder or mount to a carrier board themselves.
• IO39 and IO36 are input-only, which limits some GPIO use for certain projects.

Specifications

Processor	Dual-core Xtensa 32-bit LX6 MCU
Wireless	2.4GHz WiFi and Bluetooth dual-mode
Network protocols	IPv4, TCP, UDP
Serial baud rate	80 to 5,000,000
Memory	Integrated SPI flash 3.32 Mbit, SRAM 520 KB
Operating temperature	-40 to +85 C
Package	2 PCS, no soldered pins

Our Verdict

The WT32-ETH01 2-pack is a well-rounded choice for engineers who need a compact, industrial-capable module to add Ethernet, WiFi and Bluetooth networking to serial devices. It provides transparent serial forwarding, flexible firmware update paths and high baud support at a practical value, though it requires some hardware assembly and attention to input-only GPIO limits. For integrating legacy serial hardware into modern networks it is a pragmatic and cost-effective tool.

Frequently Asked Questions

Can the module upgrade firmware over the network?
Yes, the WT32-ETH01 supports firmware upgrades via wired Ethernet or WiFi for remote maintenance.

Does the product include pins or headers?
No, the modules are supplied without soldered pins, so soldering or a carrier board is required for many installations.

Are all GPIOs full bidirectional?
No, IO39 and IO36 are input-only and cannot be used as outputs.