ESP-01 WiFi Serial Transceiver Module (ESP8266)

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    • Product Code: WIF-TRX-ESP8266
    • Warranty Period: 12 months
    Note: The ESP-01S module being shipped (Cytron Technologies) from mid of October 2021 onwards is uploaded with Cytron_ESP_AT V2.2.0, it supports more functions. For more info, please check this GitHub.


    Woh! The super low-cost WiFi module is here, we are carrying it now! The ESP-01S ESP8266 WiFi Module is a self-contained SOC with an integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network. The ESP8266 is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor. Each ESP8266 module comes pre-programmed with an AT command set firmware, meaning, you can simply hook this up to your Arduino device and get about as much WiFi-ability as a WiFi Shield offers (and that’s just out of the box)! The ESP8266 module is an extremely cost-effective board with a huge, and ever-growing, community. There are plenty of discussions and happening in the official community:
    This module has a powerful enough onboard processing and storage capability that allows it to be integrated with the sensors and other application-specific devices through its GPIOs with minimal development up-front and minimal loading during runtime. Its high degree of on-chip integration allows for minimal external circuitry, including the front-end module, which is designed to occupy a minimal PCB area. The ESP8266 supports APSD for VoIP applications and Bluetooth co-existence interfaces, it contains a self-calibrated RF allowing it to work under all operating conditions and requires no external RF parts.
    There is an almost limitless fountain of information available for the ESP8266, all of which has been provided by amazing community support. Under the Resources section, you will find many resources to aid you in using the ESP8266, even instructions on how to transform this module into an IoT (Internet of Things) solution!
    This module is very low cost, but very simple. It doesn't support SSL, or communication over SPI - just UART! It also doesn't have a regulator on board and it can use big spikes of 300mA or more current at 3.3V so if using with an Arduino, an external 3V regulator is essential! (Seriously don't try to power it from the 3.3V power pin the Arduino!) Also, the connector is kind of annoying and not breadboard-friendly, some female-to-male wires can help out to make it easier to plug into a breadboard.
    That said, it does do the job, and can be used as a UART-at-9600-baud to WIFI adapter using example code for Arduino or, for the really adventurous, programmed directly using an SDK
    • Model: ESP-01S
    • Power: 3.3VDC, proper 3.3V voltage regulator, and NO level shifter is needed as the IO pins are 5V tolerant.
    • 802.11 b/g/n protocol
    • 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
    • Integrated temperature sensor
    • Support antenna diversity
    • Integrated low power 32-bit CPU could be used as an application processor
    • Power down leakage current: < 10 uA
    • I/O interfaces:
      • SDIO 1.1/2.0
      • SPI
      • UART
    • Communication interfaces:
      • STBC
      • 1x1 MIMO
      • 2x1 MIMO
    • A-MPDU & A-MSDU aggregation & 0.4 ms guard interval
    • Wake up and transmit packets in < 2 ms
    • Standby power consumption of < 1.0 mW (DTIM3)
    Packing List

    Packing list:

    • 1 x ESP-01 WiFi Serial Transceiver Module (ESP8266) 
    Q & A (21)
    Hi is this ESP-01 or ESP-01s model? ( Jagathes Varma A/L Subramaniam , 25/02/2020 )
    Hi, it is ESP-01S Model. Thanks :)
    Hi, what is the Flash and RAM size of this module? ( Gajein, 20/02/2020 )
    Not answered yet.
    How is the 3% cash rebate given back?? ( David Pan , 20/11/2019 )
    Hi, the 3% cashback will be given in terms of CytronCash. Refer to this link for more information about CytronCash:  Thanks :)
    No light is on after 3.3V power supplied is applied. What can I do? ( JZChan, 07/11/2019 )
    Hi, you may email to for technical assistance. Our technical team will try their best to help you. Thanks :)
    It try to enter the AT code in the serial monitor but it didnt reply anything. The connection actually ok with red light on ( Muhammad Nur Zamir Bin Amiludin, 16/12/2018 )
    Hi, please fill this form here and our technical support will help you in details. Thanks.
    is there any tutorial showing how to use the WiFi Serial Transceiver Module (ESP8266) with Arduino UNO instead of maker uno? Can Arduino UNO use the same connection with the ESP8266 as shown in the tutorial for Maker UNO and ESP8266 module ( Ahmad Aiman Hassan, 09/10/2018 )
    Hi, yes Maker UNO is Arduino UNO compatible.
    so when i receive it , i can pnp it without flash the firmware ? ( Wadapap, 18/05/2018 )
    Hi, what do you mean by pnp? For further questions, please visit to our technical forum for similar question or post your question there, as this session is only for short inquiry. Thanks.
    its already flash firmware ? or user must flash byself ? this esp8266 is using what chip ? PUYA chip ? ( Wadapap, 18/05/2018 )
    Hi, yes it comes with AT command flash. We're not sure about PUYA chip, but it state ESP-01S on the board. Thanks.
    Hi when the item will be in stock?tq ( M.qayyum, 29/04/2018 )
    Hi, it will be restocked in 1-2 weeks. Thanks.
    Hi. When the stock available? Thank you. ( Yusri, 08/02/2018 )
    Hi, it will be available end of this month. Thanks.

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    Tags: wifi, serial, transceiver, module, (esp8266), wif-trx-esp8266, ESP-01S, ESP01, ESP01S, ESP-01