Project #10: ESP8266 Thing – Web Server – Mk03

AP Web Server

Not only can the ESP8266 connect to a WiFi network and interact with the Internet, but it can also set up a network of its own, allowing other devices to connect directly to it. This example demonstrates how to turn the ESP8266 into an access point (AP), and serve up web pages to any connected client.

After uploading this sketch, find another device that you can connect to a WiFi network – phone, laptop, etc. Look for a network called “Thing-XXXX”, where XXXX is the last 2 bytes of the Thing’s MAC address.

WiFi => Yes

ESP8266 Thing XXXX

He sketch sets the network’s password to “donlucmk01”.

After connecting to your Thing’s AP network, load up a browser and point it to The Thing should serve up a web page showing you its ADC and digital pin 12 readings:

Analog Pin = XXX
Digital Pin: XXX
Humidity and Temperature
Humidity: XX.XX%
Celsius: XX.XX*C
Fahrenheit: XX.XX*F

LED Green

After that, give (No) and (Yes) a try, and keep an eye on the Thing’s green LED while you do.

RHT03 Humidity and Temperature Sensor

The RHT03 is a low cost humidity and temperature sensor with a single wire digital interface. The sensor is calibrated and doesn’t require extra components so you can get right to measuring relative humidity and temperature.


1 x SparkFun ESP8266 Thing
1 x SparkFun FTDI Basic Breakout – 3.3V
1 x RHT03 Humidity and Temperature Sensor
3 x Jumper Wires 6″ M/M
1 x Full-Size Breadboard
1 x SparkFun Cerberus USB Cable

SparkFun ESP8266 Thing

LG1 – Digital 5
RHT – Digital 4
VIN – +3.3V





Don Luc

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