ESP-01S Wireless WiFi Development Board

WIFI 1MB Flash 80KB Ram 160Mhz
$5.00 USD
The price is for a single piece.
There are 3 pieces in the retail box.
The quantity has to be a multiple of 3.
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Introducing the Lonely Binary ESP-01S - The WiFi Wonder!

Are you tired of bulky, power-hungry boards cramping your style? Look no further than the Lonely Binary ESP-01S, the pint-sized powerhouse that brings WiFi magic to your fingertips!

Packed with the ESP8266EX WiFi Module, this little wonder is a self-contained SOC with an integrated TCP/IP protocol stack. It's like having your very own WiFi superhero, granting any microcontroller access to your WiFi network. It can even host its own application or be the ultimate WiFi wingman, offloading networking functions for another processor.

The Lonely Binary ESP-01S is as versatile as a chameleon in a WiFi jungle. It can be your trusty sidekick, wirelessly empowering other MCUs like Arduino, or it can strut its stuff solo as a stand-alone MCU with WiFi superpowers!

We've made it oh-so-simple for you. Each Lonely Binary ESP-01S ESP8266 module comes pre-programmed with an AT command set firmware. That means you can hook it up to your Arduino MCU and bam! WiFi is at your command right out of the box. Or, for the daring ones among you, connect the Lonely Binary ESP-01S to a USB-TO-Serial adapter and dive into the Arduino IDE to unleash its stand-alone MCU potential. The choice is yours, oh mighty creator!

But wait, there's more! Our Lonely Binary ESP-01S knows how to keep things compact and efficient. It's the ultimate space-saver, with minimal external circuitry required. Say goodbye to crowded PCB areas! With its self-calibrated RF, this little champ works its WiFi wonders under any condition, without the need for external RF parts. It's like having a WiFi magician in your pocket!

And here's the secret sauce, folks. The Lonely Binary ESP-01S is the minimalist superhero of the ESP8266 family. We've stripped away all those unwanted components, leaving you with pure WiFi power. No more wasting power on unnecessary bells and whistles. It's perfect for those power-saving projects, especially battery-powered marvels. With the Lonely Binary ESP-01S, every ounce of power is dedicated to your mission!

So, fellow tech enthusiast, join the Lonely Binary revolution and bring WiFi enchantment to your world. Embrace the magic, embrace the power, and let the Lonely Binary ESP-01S be your WiFi companion on this epic adventure of creation!

Tech Specs

Microcontroller The ESP8266EX features a 32-bit RISC CPU running at a clock speed of 80MHz, providing ample processing power for WiFi communication and other tasks.
WiFi Standards It supports the 802.11 b/g/n WiFi standards, allowing seamless integration with a wide range of WiFi networks and devices.
Interfaces It supports multiple interfaces including UART, SPI, I2C, and GPIO, providing versatility for connecting with other devices and modules.
Development Environment It is compatible with various development environments, including the Arduino IDE, making it accessible and easy to program for both beginners and experienced developers.
AT Command Set Firmware Each Lonely Binary ESP-01S module comes pre-programmed with AT command set firmware, enabling easy integration with Arduino MCUs, providing WiFi connectivity right out of the box.
Stand-alone Programming The ESP-01S can be connected to a USB-to-Serial adapter, allowing direct programming in the Arduino IDE. This feature provides flexibility and the ability to utilize it as a stand-alone MCU.
Compact Design The Lonely Binary ESP-01S is designed to occupy minimal PCB space, making it suitable for projects with size constraints or where real estate is at a premium.
Integrated RF Functionality With a self-calibrated RF, the ESP-01S maintains reliable WiFi performance under varying operating conditions without the need for external RF components.
Power Efficiency The Lonely Binary ESP-01S stands out as a power-saving solution due to its minimalistic design. Unnecessary components are eliminated, resulting in optimized power consumption, making it ideal for battery-powered projects.
Net Weight 1.5 g
Dimension (L) 24 mm x (W) 14 mm x (H) 3 mm


Lonely Binary Product Schematics



What’s in the Box

There are 3 pieces in the retail box.
The listing price is for

  • 1 x ESP-01S



  • Australia Orders over $55 - Your order will enjoy free shipping via Australia Post Standard Shipping Services. 
  • International Orders over $99 - Your order will be posted via Australia Post Air Mail Services. 

Raspberry Pi board / Micro:bit board / NVIDIA board will be excluded; All PCB orders will not enjoy free shipping. Distributors and wholesale orders are not eligible for free shipping.


At this time, LONELY BINARY is an online-only business, with our products available through This allows us to keep the cost down for the customer. Orders cannot be picked up. 


We ship Australia wide to all addresses, including PO Box, Parcel Locker, etc.All Australian orders will be shipped via Australia Post, Courier Please or Fastway Couriers (Aramex). International Orders will be shipped via Australia Post or DHL. Your order will be shipped within one business day after we receive payment, providing the items are in stock.

  • Standard Shipping
    Sent via standard Australia Post stamped letter mail, typically 5-9 business days. No tracking/support available other than confirmation of dispatch.
  • Express Post
    Sent via Australia Post Express Service, Fastway Courier or Courier Please, 1 – 2 business days for metro orders, potentially longer for orders outside of metro zones, with full tracking.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Shipping costs for international orders vary depending on location and package size, where possible we have kept this to flat rate charges to reduce confusion. International orders are shipped through Australia Post and DHL courier service depending on the most economical at the time. 


Shipping Method via Delivery Area Delivery Time(business day) Tracking No. Weight Limit
DHL Asia 1-2 YES No Limit
western EU 2-3 YES No Limit
eastern EU 3-5 YES No Limit
North America 2-3 YES No Limit
Australia 2-3 YES No Limit
South America 3-5 YES No Limit
South Africa 3-5 YES No Limit


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