# UART USB Programmer, ESP-01, ESP-8266

> USB-UART programmer for ESP-01, ESP-8266 modules, featuring an 8-pin connector with 2.54 mm pitch and access to GPIO0 for entering programming mode. Uses the CH340G chip for serial communication with the computer, powered from USB at 5VDC with onboard conversion to 3.3VDC. Dimensions: 48 x 17 x 12mm.

- Page: https://sigmanortec.ro/en/uart-usb-programmer-esp-01-esp-8266
- Price: 9.10 RON
- Availability: In stock; 1-2 zile
- Reference: 33222 · EAN: 5949343507225
- Category: Mechatronics and IoT > Programming
- Package (shipping data): 0.006 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:33 (Europe/Bucharest)

## Description

USB-UART programmer for ESP-01, ESP8266 modules, ideal for fast firmware upload and testing. It has an 8-pin connector with a pitch of 2.54 mm, easy access to GPIO0 for entering programming mode, communicates stably via CH340G and provides power from USB 5V with conversion to 3.3V on the board. Compact size, easy to integrate on the workbench.
USB programmer for ESO-01, ESP-8266, 8 pins (2.54 space between pins).
This product is designed for programming ESP-01 modules and provides convenient access to the GPIO0 pin.
Based on USB-UART CH340. It uses the integrated CH340G for communication with the computer, which allows USB to serial communication.
It requires the addition of a large capacitor of at least 1000uF to keep the voltage fixed at 5V.
Use:
To bring the ESP-01 module into programming mode, it is necessary to connect GPIO0 with GND
Specifications:
Used with Arduino ESP8266 platform for Arduino IDE