ESP8266_Arduino_simple_communication

Simple code to make universal communication between a ESP8266-chip and Arduino easy.

How to use

ESP8266 should be flashed with latest NodeMCU firmware.

After that upload this sketch to the ESP8266 via the Arduino IDE.

Connect an Arduino via serial to the ESP8266.

All the serial commands starting with a "<" and end with a ">" wil be read by the ESP8266, according to the brainchild of Robin2.

Commands that need multiple value's will have the values split with ":::".

Commands

Send the following commands via serial to the ESP8266 to perform the specified operations:

Connect to/Change WIFI network

To connect to a WIFI network send the following command over serial to the ESP8266:

<ssid:::password>

Where ssid must be the ssid of the wifi network to connect to and password the password.

ESP8266 Response:

<connected:::local-ip-address>

Where local-ip-address will be filled with the local-ip-address obtained by the local DHCP-server.

GET-request to url:

<url-with-parameters>

If the request was succesfull the ESP8266 will send the response:

<payload>

Where payload will be the contents of the url requested.

If the request was unsuccesfull the ESP8266 will return:

<httpCode>

Where httpCodewill be a Http-code according to the following set of codes:

HTTPC_ERROR_CONNECTION_REFUSED = -1 HTTPC_ERROR_SEND_HEADER_FAILED = -2 HTTPC_ERROR_SEND_PAYLOAD_FAILED = -3 HTTPC_ERROR_NOT_CONNECTED = -4 HTTPC_ERROR_CONNECTION_LOST = -5 HTTPC_ERROR_NO_STREAM = -6 HTTPC_ERROR_NO_HTTP_SERVER = -7 HTTPC_ERROR_TOO_LESS_RAM = -8 HTTPC_ERROR_ENCODING = -9 HTTPC_ERROR_STREAM_WRITE = -10 HTTPC_ERROR_READ_TIMEOUT = -11 Source ESP8266HTTPClient.h by Arduino