Will someone please give a simple example of an application for this module? - Arduino novice.

////this code let u to initial ur ESP01 and get into AT commend Mode，but you hav to connect the wire properly. #include SoftwareSerial esp(10, 11); // RX, TX for esp01 communication void setup() { // Open serial communications and wait for port to open: Serial.begin(115200); Serial.println("Goodnight moon!"); // set the data rate for the SoftwareSerial port esp.begin(115200); //for esp01 esp.println("Hello, world?"); // it shows that esp01 doesn't response } void loop() { // run over and over if (esp.available()) { Serial.write(esp.read()); } // else Serial.println("No connect"); if (Serial.available()) { esp.write(Serial.read()); } }

Are the header pins already soldered on the board?

Yes, soldered. and there are 8 header pins.

what baud rate are these set at. thank you

It comes at 9600 baud but can be set to another rate with an AT command and the change persists across power cycles. I strongly recommend flashing with a more recent firmware revision as this one is a little flaky.

What is the memory in this board? one picture says 4 mb and the other says 1 mb

We just received one 4/12/22 and it has 1MB and we are returning it for Not As Advertised. Unimpressed!

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

Product ID: 7443534

Details

Brand
DIYmall
Connectivity Technology
Wi-Fi
Memory Storage Capacity
4 MB
Model Name
FBA_FZ1082
Ram Memory Installed Size
4 MB

⚡Ultra-compact & lightweight

💾4MB Flash memory

📶Robust Wi-Fi signal

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Description

🚀 Elevate your IoT game with the ESP8266 ESP-01S — small module, big impact!

COMPACT YET MIGHTY - Tiny 0.98" module packs a punch without hogging space.
UPGRADE YOUR WORKFLOW - Say goodbye to USB cables and hello to wireless freedom.
PLUG PLAY COMPATIBILITY - Works flawlessly with Arduino IDE and major OS platforms.
POWERFUL 4 MB FLASH STORAGE - Store and run complex firmware with ample onboard memory.
SEAMLESS WIRELESS INTEGRATION - Transform any UART device with effortless Wi-Fi connectivity.

The ESP8266 ESP-01S WiFi Serial Transceiver Module by DIYmall features a powerful 4MB flash memory and enhanced signal strength in a compact 0.98" form factor. Compatible with UART devices and programmable via Arduino IDE, it enables seamless wireless communication across Windows, macOS, and Linux platforms. Ideal for DIY projects and upgrading devices like 3D printers, it offers a reliable, cable-free experience backed by a 1-year warranty.

Specifications

ASIN	B00O34AGSU
Best Sellers Rank	#134 in Computer Networking Transceivers
Brand	DIYmall
Built-In Media	/
Compatible Devices	devices with UART interface or USB Type A interface
Connectivity Technology	Wi-Fi
Customer Reviews	4.4 4.4 out of 5 stars (815)
Item Dimensions L x W x H	0.98"L x 0.39"W x 0.47"H
Item Weight	3 g
Manufacturer	DIYmall
Memory Storage Capacity	4 MB
Mfr Part Number	FBA_FZ1082
Model Name	FBA_FZ1082
Model Number	ESP8266
Number of Items	1
Number of Packs	1
Operating System	Windows, macOS, Linux
Processor Brand	Espressif
Processor Count	1
RAM Memory Installed	4 MB
RAM Memory Technology	LPDDR3
UPC	702795761325
Unit Count	1 Count
Warranty Description	1 year
Wireless Compability	802.11b

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€ 13.40

Duties & taxes included

In stock

Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Finland.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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