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Two USB programmers with toggle switches and five small ESP-01S Wi-Fi modules with pin headers

globalcrown

globalcrown ESP8266 ESP-01S 4MB Wi-Fi adapter kit (2 programmers + 5 modules)

SKU CH-WHAN-QH2QM

Kit supplies five ESP-01S modules with 4 MB flash and two CH340G USB programmers featuring a mode toggle for AT-command debugging or firmware flashing

  • Product typeUSB Wi-FI Adapter
  • 4 MB flash stores larger firmware than 1 MB modules
  • Toggle switch selects UART debugging or programming mode
  • CH340G USB-to-serial chip enables direct computer connection
  • Modules plug straight into programmers without extra wiring
  • Kit includes five modules and two programmers for parallel development

Kit contents

This kit supplies five ESP-01S Wi-Fi modules with 4 MB flash memory and two USB programmer boards. It is aimed at hobbyists, students and engineers prototyping wireless IoT devices or learning AT-command firmware control.

Power and thermal behaviour

Each module draws modest current from the USB port during normal transmit and receive cycles. The CH340G USB-to-serial chip on the programmer runs cool and silent because it has no active cooling or high-power regulation circuitry.

Deciding specification

The 4 MB flash capacity determines whether your firmware image and file system will fit; smaller 1 MB modules cannot hold the same code. Buyers who need more storage must select a different module.

How it compares

Measured against everything we stock in Wi-Fi Cards & USB Adapters, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 70% of the 1,565 comparable items (median $18.99).

Specifications

Product
Product typeUSB Wi-FI Adapter

Questions about this item

How do I plug the ESP-01S module into the USB programmer and which switch position do I use for flashing?

Align the module pins with the yellow header on the programmer and press it straight in; slide the on-board toggle to the PROG side before flashing firmware.

What driver must be present on my computer before the programmer appears as a serial port?

The CH340G USB-to-serial chip requires its driver installed; without it the device will not enumerate as a COM port.

What practical limit appears first when the module runs continuously at full transmit power?

The ESP8266 chip draws peak current during TX bursts, so a weak USB supply will brown-out the module before thermal limits are reached.

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