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The 8266CS01 is a wifi enabled board that recognizes color components Red, Green and Blue of any material placed closed to the sensor. The reading of the color components is done via a TCP request to the board and the percentage color component values are returned in a JSON string. The sequence for reading is done by sending the following strings via TCP on port 9999: acquire (wait 5 seconds for acquisition to complete)
read

The return message is in JSON format as follows: {"RGB": [{ "Red:": "53", "Green": "23", "Blue:": "24"}]}

each number representing the percentage of that color.

Setting up the board using a web browser

• Connect the 5V power
• Press board reset button

• From your computer, check available wireless networks and connect to a network which name has the form ESP_STATION_xxxxxxx

• When prompted, enter the password to the ESP_STATION. The preset password is ‘espadmin’

• Wait until your computer successfully connects to ESP_STATION_xxxxxxx
• From your web browser and after station is connected enter the following address and wifi network SSID and password:
• http://192.168.4.1/?SSID=Your_SSID&Password=Your_password
• Reset the board
• Enter once again http://192.168.4.1/?SSID=Your_SSID&Password=Your_password (or just press return on your browser)
• Wait until your browser shows the IP address that has been assigned automatically to the board:
• ESP8266 WIFI module IP address is:192.168.1.xxx
• Take note of that IP address, this is the address for the board WIFI
• You can now send TCP commands to the board IP address on port 9999 as explained above.

Using the serial interface

• Using your favorite terminal program connect to the serial port the board is plugged into
• Connect the RX on the board to the TX of the USB serial cable, and the TX on the board to the RX on the USB serial cable
• Type node.restart()

• You should receive a message:

• • Firmware Copyright (c) 2014 zeroday nodemcu.com
• • Custom firmware Copyright(c) 2015 Snaptekk www.snaptekk.com
• • ESP8266 Temperature and Humidity Control v01
• • The Station IP is not yet set

• Type:

• wifi.setmode(wifi.STATIONAP)

• wifi.sta.config(ssid,password)
• ssid: the ssid of your WIFI network

• password: the password of your WIFI network

• Type node.restart()

• Wait a few seconds and you should see the message:

  Board IP successfully assigned 192.168.x.x (this is the IP assigned to the board) Flashing the board
  

• Connect the board RX and TX to a serial adaptor

• Turn the Flash switch into the on position
• Press the reset button
• Start the flash program
• If flashing fails, press reset button one or two times and try again