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

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 design

💾4MB high-speed flash memory

📶Robust Wi-Fi signal strength

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Description

🚀 Power your smart projects with the ESP8266 ESP-01S — small size, big impact!

TRUSTED PROVEN - Join over 800 satisfied users with a 4.5-star rating, backed by a 1-year warranty for peace of mind.
MINIMALIST POWERHOUSE - At under 1 inch and just 3 grams, this module fits perfectly into any compact design without compromising power.
GENEROUS 4 MB FLASH MEMORY - Store complex programs and firmware updates with ample onboard flash, ensuring smooth and versatile performance.
PLUG PLAY COMPATIBILITY - Easily program using Arduino IDE’s 'Generic ESP8266 Module' setting, compatible across Windows, macOS, and Linux.
SEAMLESS WI FI INTEGRATION - Connect effortlessly with the latest ESP-01S module, delivering a stronger and more reliable signal for your IoT projects.

The ESP8266 ESP-01S WiFi Serial Transceiver Module by DIYmall features a robust 4MB flash memory and enhanced signal strength in a compact 0.98" x 0.39" x 0.47" form factor. Compatible with UART and USB interfaces, it supports seamless programming via Arduino IDE across major operating systems. Ideal for developers seeking reliable, high-performance Wi-Fi connectivity in IoT and embedded applications.

Specifications

ASIN	B00O34AGSU
Best Sellers Rank	#83 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	4.5 out of 5 stars 808 Reviews
Included Components	/
Item Dimensions L x W x H	0.98"L x 0.39"W x 0.47"H
Item Weight	3 Grams
Manufacturer	DIYmall
Memory Storage Capacity	4 MB
Mfr Part Number	FBA_FZ1082
Model Name	FBA_FZ1082
Model Number	ESP8266
Operating System	Windows, macOS, Linux
Processor Count	1
RAM Memory Installed	4 MB
RAM Memory Technology	LPDDR3
Ram Memory Installed Size	4 MB
Smart Home Compatibility	Not Smart Home Compatible
UPC	702795761325
Unit Count	1.0 Count
Warranty Description	1 year
Wireless Compability	802.11b

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Bs.149

Duties & taxes included

In stock

Sold byAmazon BoliviaDelivered 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 Bolivia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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