It is required to have Arduino version 1.6.4 or higher in order to be able to install the ESP’s platform packages.ġ.Open the preferences window from the Arduino IDE. You can refer the following site for more ESP8266 AT command set click here.įirst arduino environment has to be setup to make it compactable with the ESP module. In this mode ESP-01 act as both an AP as well as in STA mode. This allows any device connected to that network to communicate with the module. In STA mode, the ESP-01 can connect to an AP(access point) such as the Wi-Fi network from your house. It establishes a two way communication between the ESP8266 and the device that is connected to it via Wi-Fi. In AP the Wi-Fi module acts as a Wi-Fi network, or access point (hence the name), allowing other devices to connect to it. Using the Software Serial library we can send serial commands to Arduino and Arduino with again send it to ESP8266 and vice. 1.Using Arduino as Host MCU to communicate with ESP8266. Make sure the NL and CR option is set.ĮSP8266 module has threeoperational modes. Esp8266-01 comes with AT-commands default firmware there are 2 ways we can interact with that firmware via Arduino.If you see garbage value on the screen, try resetting the module, or checking your baud rate. Open the serial monitor change the boud rate to 115200 and coose NL and CR ( new line and carrage return ).Type AT on the serial monitor you will see an OK response. Keep it on high (3.3V) for normal operation. Rx: Goes to Arduino pin0 (But needs a voltage adjusting).In our case (normal operation), it shall be connected to 3.3V (high). GPIO0 also controls the module mode (programming or normal operation). GPIO0 and GPIO2 are general purpose digital ports.VCC shall be connected to the 3.3V power supply.Connect ESP8266 as per the above circuit. Upload Bareminimum sketch from examples to arduino this is to make sure that there are no other programs running on arduino and using serial communication channel.ĪT firmware is compatible with the Arduino IDE, so we are going to use this firmware for this tutorial. Serial interface is useful for debugging the programs by sending some debug info to serial. It is better to keep baud rate below 115200.

Remember that few USB to Serial converter does not support higher baud rate. Hardware Serial Programming is similar to the Arduino Serial. First download Arduino IDE ensure that you have the latest software version (some older versions won’t work), visit the following URL. On ESP8266 we have one hardware serial i.e.

Software serial esp8266 programming