ESP-Prog-2 JTAG Debugger and Programmer

The ESP-Prog-2 is Espressif’s next-generation development, flashing, and debugging tool. Powered by the high-performance ESP32-S3 chip, this upgraded programmer delivers seamless automatic firmware downloading, serial communication (UART), and advanced JTAG online debugging for an expanded lineup of Espressif chips.

Expanded Target Chip Compatibility

Unlike the original model, the ESP-Prog-2 brings extended hardware support across Espressif's modern ecosystems:

• Automatic Flashing & Serial Communication: Fully compatible with ESP8266, ESP32, ESP32-S2, ESP32-S3, and ESP32-C3 platforms.

• JTAG Online Debugging: Supported on ESP32, ESP32-S2, ESP32-S3, and ESP32-C3 target microcontrollers.

Plug-and-Play Type-C Connectivity

Connect easily to your PC using a single USB Type-C cable. Your computer will automatically identify two separate virtual COM ports based on their port numbers—one dedicated to firmware downloading and the other dedicated to JTAG debugging.

Flexible Voltage Selection & 1.27mm / 2.54mm Headers

To accommodate different target systems, both the Program and JTAG interfaces feature onboard jumper pins (PROG PWR SEL and JTAG PWR SEL) allowing you to select between 3.3V or 5V power delivery. To ensure maximum compatibility with custom PCBs and breadboards, the board provides dual headers spaced at both industry-standard 2.54mm (0.1") and compact 1.27mm (0.05") pitches. (Note: While power delivery is selectable, the RX/TX and JTAG logic signal levels are fixed at a safe 3.3V).

IDE-Ready with Status LEDs

The ESP-Prog-2 works flawlessly with Visual Studio Code (VS Code) and PlatformIO, Espressif’s ESP-IDF, or any other development environment supporting OpenOCD. An onboard RGB status LED gives you immediate visual feedback on your hardware state:

• Red: System 3.3V power is active.

• Green: Flashing or serial communication (UART) is active.

• Blue: JTAG online debugging session is active.

Drivers & Firmware Updates

The ESP-Prog-2 uses native USB-CDC protocols and typically requires no external USB-to-UART drivers on modern Windows, macOS, or Linux systems. You can update or customize the built-in bridge firmware directly from a Chromium-based browser via Espressif's official online flashing tool, ESP Launchpad (using the esp-usb-bridge repository).