esp-dev-kits Choose target... Choose version... Debugging and Flashing Boards ESP-Prog User Guide Getting Started Description of Components Start Application Development Contents and Packaging Hardware Reference Block Diagram Header Block Related Documents Disclaimer and Copyright Notice H/W Reference ESP-Prog-2 ESP-Module-Prog-1(R) ESP-Module-Prog-SUB-02 ESP-Module-Prog-SUB-01&04 Resources and Legal Notices Related Documentation and Resources Disclaimer and Copyright Notice esp-dev-kits ESP-Prog ESP-Prog Download PDF ESP-Prog [中文] This user guide will help you get started with ESP-Prog and will also provide more in-depth information. ESP-Prog is one of Espressif’s development and debugging tools, with functions including automatic firmware downloading, serial communication, and JTAG debugging. ESP-Prog’s automatic firmware downloading and serial communication functions are supported on all Espressif chips, while JTAG debugging is supported on all chips that provide JTAG interface. ESP-Prog can be easily connected to a PC with the use of only one USB cable. Then, the PC can identify the board’s Program and JTAG interfaces (functions) by their port numbers. Given that the power supply voltage may vary on different user boards, either of the ESP-Prog interfaces can provide 5 V or 3.3 V power supply through pin headers, in order to ensure power compatibility. Power on ESP-Prog could be toggled between 3.3 V and 5 V, but the RX/TX & JTAG signals will always be at the 3.3 V level. ESP-Prog (click to enlarge) The document consists of the following major sections: Getting started: Overview of the board and hardware/software setup instructions to get started. Hardware Reference: More detailed information about the board’s hardware. Related Documents: Links to related documentation. Disclaimer and Copyright Notice: Link to the disclaimer and copyright notice. Getting Started This section provides a brief introduction of ESP-Prog on how to do the initial hardware setup. Description of Components ESP-Prog - front (click to enlarge) The key components of the board are described in a clockwise direction. Key Component Description Micro USB Interface between PC and ESP-Prog. Boot Button Download button. Holding down boot and then pressing reset initiates Firmware Download mode for downloading firmware through the serial port. IO0 On/Off Pin Header to set the state of GPIO0 strapping pin. PROG PWR SEL Pin Header to select power input for the Program interface. PROG 2.54 mm Program interface with 2.54 mm (0.1”) pin pitch. PROG 1.27 mm Program interface with 1.27 mm (0.05”) pin pitch. JTAG 1.27 mm JTAG interface with 1.27 mm (0.05”) pin pitch. JTAG 2.54 mm JTAG interface with 2.54 mm (0.1”) pin pitch. JTAG PWR SEL Pin Header to select power input for the JTAG interface. LED Indicator LED to indicate ESP-Prog state. There are three LED modes: red, green, and blue. The red LED lights up when the system is connected to the 3.3 V power. The green LED lights up when ESP-Prog is downloading data. The blue LED lights up when ESP-Prog is receiving data. USB Bridge Single USB-to-UART bridge chip provides up to 3 Mbps of transfer rate. Reset Button Press this button to restart the system. Start Application Development Before powering up your board, please make sure that it is in good condition with no obvious signs of damage. Required Hardware ESP-Prog USB 2.0 cable (Standard-A to Micro-B) Computer running Windows, Linux, or macOS Dupont lines or flat cables provided by Espressif for connecting the development board to ESP-Prog Note Be sure to use an appropriate USB cable. Some cables are for charging only and do not provide the needed data lines nor work for programming the boards. Hardware Setup Connect the ESP-Prog board and the PC USB port via a USB cable. The PC then detects the two ports of ESP-Prog, indicating that the board is connected successfully. If the ports are not detected install the FT2232HL chip driver on your PC. Select the output power voltage for the Program/JTAG interfaces, using PROG PWR SEL/JTAG PWR SEL pin headers. Connect the ESP-Prog and ESP user board with the flat cables provided by Espressif. Start programming (downloading) or JTAG debugging, using the official software tools or scripts provided by Espressif. Software Setup Please proceed to Get Started with ESP-IDF, where Section Installation Step by Step will quickly help you set up the development environment. Contents and Packaging Retail Orders Each ESP-Prog board comes in an individual package. ESP-Prog Package Contents The contents are as follows: Development board ESP-Prog Cables Two flexible flat cables: One cable for JTAG 1.27 mm interface to connect to 2*5-PIN male shrouded box header. One cable for PROG 1.27 mm interface to connect to 2*3-PIN male shrouded box header. If you order a few samples, each board comes in an individual package in either antistatic bag or any packaging depending on your retailer. For retail orders, please go to https://www.espressif.com/en/company/contact/buy-a-sample. Wholesale Orders If you order in bulk, the boards come in large cardboard boxes. For wholesale orders, please go to https://www.espressif.com/en/contact-us/sales-questions. Hardware Reference Block Diagram The block diagram below shows the components of ESP-Prog and their interconnections. ESP-Prog Block Diagram (click to enlarge) Power Supply Options There are three mutually exclusive ways to provide power to the board: ESP-Prog USB Port, default power supply (recommended) 5 V and G (GND) pins 3.3 V and G (GND) pins Header Block The two tables below provide the Name and Function of the pins on both sides of the board (Program Interface and JTAG Interface). The pin names are shown in the front view of the ESP-Prog board. The numbering is the same as in the ESP-Prog Schematic (PDF). Program Interface No. Name Function 1 ESP_EN Enable signal 2 VDD Power supply 3 ESP_TXD TX pin 4 GND Ground 5 ESP_RXD RX pin 6 ESP_IO0 Strapping pin JTAG Interface No. Name Function 1 VDD Power supply 2 ESP_TMS JTAG TMS pin, mode selection 3 GND Ground 4 ESP_TCK JTAG TCK pin, clock input 5 GND Ground 6 ESP_TDO JTAG TDO pin 7 GND Ground 8 ESP_TDI JTAG TDI pin 9 GND Ground 10 NC None Related Documents ESP-Prog Schematic (PDF) ESP-Prog PCB Layout (PDF) ESP-Prog Dimensions (PDF) For further design documentation for the board, please contact us at sales@espressif.com. Disclaimer and Copyright Notice See Disclaimer and Copyright Notice. Next Previous Suggestion on this document? Provide feedback Help improve this document? Edit on GitHub Need more information? Check ESP forum Sales Questions Technical Inquiries © Copyright 2016 - 2026, Espressif Systems (Shanghai) CO., LTD Built with Sphinx using a theme based on Read the Docs Sphinx Theme. esp-dev-kits Choose target... Choose version... Debugging and Flashing Boards ESP-Prog ESP-Prog-2 ESP-Module-Prog-1(R) ESP-Module-Prog-SUB-02 ESP-Module-Prog-SUB-01&04 Resources and Legal Notices Related Documentation and Resources Disclaimer and Copyright Notice Terms of Use for Development Board esp-dev-kits Disclaimer and Copyright Notice Download PDF Disclaimer and Copyright Notice [中文] Information in this document, including URL references, is subject to change without notice. All third party’s information in this document is provided as is with no warranties to its authenticity and accuracy. No warranty is provided to this document for its merchantability, non-infringement, fitness for any particular purpose, nor does any warranty otherwise arising out of any proposal, specification or sample. All liability, including liability for infringement of any proprietary rights, relating to use of information in this document is disclaimed. No licenses express or implied, by estoppel or otherwise, to any intellectual property rights are granted herein. The Wi-Fi Alliance Member logo is a trademark of the Wi-Fi Alliance. The Bluetooth logo is a registered trademark of Bluetooth SIG. All trade names, trademarks and registered trademarks mentioned in this document are property of their respective owners, and are hereby acknowledged. Terms of Use for Development Board The development board is intended for R&D evaluation, engineering design verification, and early-stage product development. It is provided as a convenient platform for development and testing. The development board is not intended as a mass-production component or as a finished product for end consumers; therefore, its product management approach differs from that of mass-produced chips and modules. The development board has not obtained specific national or industry certifications and is not covered under regulatory frameworks such as CE, UL, or CCC. As a result, it may not meet the requirements of such regulations. Users should ensure that their use of the development board complies with the applicable laws and regulations of the country or region in which it is used. In addition, the development board has not been designed, validated, or managed for reliability testing, production, or commercial deployment purposes. Users assume full responsibility for the correct and safe use of the product. For applications beyond the intended use of the development board, including but not limited to pre-production testing, system integration, final product delivery, or other commercial uses, the user should, before mass production and in light of its own product requirements, fully evaluate the technical suitability, reliability requirements, regulatory compliance, and system integration risks associated with such applications. The user should also complete all necessary verification, testing, and certification activities relating to system-level design, product certification, reliability validation, regulatory compliance assessment, and commercial deployment. Espressif assumes no liability arising from applications beyond the intended use of the development board. Regardless of whether the part