ESP8266 ESP-01S WiFi Serial Transceiver Module with Wi-Fi to Serial Test Expansion Board For Easier Programming Compatible with Arduino

ESP8266 ESP-01S WiFi Serial Transceiver Module with Wi-Fi to Serial Test Expansion Board For Easier Programming Compatible with Arduino
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  • Brand: DIYmall
  • Product Code: FZ2400+KY0043 ESP-01S Wifi Module with Serial Expansion board
  • Availability: In Stock
  • $8.99
  • Ex Tax: $8.99
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Tags: ESP-01S Wifi module, wireless transceiver module, wifi module to serial test expansion board, ESP-01S wifi to serial expansion shield

ESP8266 ESP-01S WiFi Serial Transceiver Module 4MB Flash

Note: regarding program: Please choose  "Generic ESP8285 Module" board in Arduino IDE  to program it.
Also note that ESP-01S is DOUT protocol. When you program it, the SPI Mode please choose DOUT.

comparing to esp-01, esp-01s has these advantages:
The PCB layout has changed for an improvement in WiFi radio performance
4MB Flash Memory...upgraded from 512KB
Latest version esp-01s,with stronger signal

    SDIO 2.0, SPI, UART
    32-pin QFN package
    Wi-Fi Direct (P2P), soft-AP
    Integrated TCP/IP protocol stack
    Integrated TR switch, balun, LNA, power amplifier and matching network
    Integrated PLLs, regulators, DCXO and power management units
    +19.5dBm output power in 802.11b mode
    Power down leakage current of <10uA
    Integrated low power 32-bit CPU could be used as application processor
    SDIO 1.1/2.0, SPI, UART
    STBC, 1×1 MIMO, 2×1 MIMO
    A-MPDU & A-MSDU aggregation & 0.4ms guard interval
    Integrated RF switch, balun, 24dBm PA, DCXO, and PMU
    Integrated RISC processor, on-chip memory and external memory interfaces
    Integrated MAC/baseband processors
    Quality of Service management
    I2S interface for high fidelity audio applications
    On-chip low-dropout linear regulators for all internal supplies
    Proprietary spurious-free clock generation architecture
    Integrated WEP, TKIP, AES, and WAPI engines

    802.11 b/g/n
    Wake up and transmit packets in < 2ms
    Standby power consumption of < 1.0mW (DTIM3)

ESP-01S WiFi Module to Serial Expansion Board Compatible with Arduino


This is an expansion board for the ESP-01S WiFi module. After power-on, the module is in BOOT flash mode. You can test AT command through the serial port on the expansion shield.

How to burn the firmware for the ESP-01S wifi module?
Firstly, follow the wiring example to plug the ESP-01S wifi module to the expansion board properly, and wire the shield with FT232 serial module, connect the serial module to the PC through the USB cable.
Secondly, press and hold the Flash button on the shield, then click on burning on the software interface, and press the RST button.
When release the Flash button, the module will enter the download mode and start burning the firmware.


Working voltage: DC 5V
Communication voltage: 3.3V
Working current: minimum 500mA
Environmental attributes: ROHS
Dimensions: 24mm*41.3mm*11.9mm

Wiring diagram:
Expansion board -- FT232 USB to serial module
VCC -- 5V
TX -- RX
RX -- TX

Package Included:
1 X ESP8266 ESP-01S Wifi Module 4MB Flash
1 X ESP-01S wifi module to Serial Expansion Board
1 X 4Pin Male Connector to Female Dupont Cable

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