(1) AT: This type of command is used to test the startup function of WI-FI module. The standard AT commands are used for this purposes, which are almost twelve.
#SOFTWARE SERIAL ESP8266 AT COMMANDS SERIAL#
The wireless WI-FI ESP 8266 module is drive through serial interfacing with Arduino or any type of modules. The operating voltage of this module is 3.3 volts, which are directly connected to the ground pin(GND) and VCC pin.
The pin 8 which is VCC pin and is used to power on the module. The pin 7 which is RST pin and this pin is used for reset the module. The pin 6 which is CH_PD, it is called chip power down pin. The pins 4 and 5, which are RX and TX, these pins are used for communication purposes and program the module. The pins 2 and 3, which are the GPIO 2 and GPIO 0, these pins decided in which mode the module would be a start-up, in other words, these are mode selected pins. The pin configuration diagram is shown in figure belowĪccording to the figure 2 the pin 1, which is GND the ground pin which is directly connected to the ground for power on this module. The ESP8266 WIFI module consists of two rows of eight pins. AT commands are the same for all these ESP modules. But in this tutorial, we are using ESP-01. There are many ESP8266 Wifi modules available in marker ranging from ESP-01 to ESP-12. Pin Configuration of ESP 8266 WI-FI Module In this fragmented market the research was continued, finally, the first WIFI system was introduced in 1997, which was the prototype communication system. After that, in 1991 the NCR and AT&T corporation invented a first wireless product that’s name was Wave Lan, which was used for the cashier system. Because the frequency band of this technology was very low therefore in beginning, this technology was only assumed for home appliances such as a microwave oven.
The history of WIFI was started in 1985 when the united states FCC used the 900 MHZ frequency band without a license. Here we would explain the AT commands of ESP8266 WIFI module details but before explaining the AT commands, first of all, we would explain the brief history of WiFi. In this advanced technology different types of modules are used, which have different features.
#SOFTWARE SERIAL ESP8266 AT COMMANDS PASSWORD#
The Lan network provides the facility of password protection and also allows the device to use the network which is within the range of that device. ESP8266 WIFI MODULE: In this modern world, the WiFi technology has removed the distances, in which the electronic devices are used, which are connected to the wireless Lan (WLAN) network, by using at 2.4 gigahertz or 5 gigahertz radio frequency bands.
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