Open the serial monitor of Arduino once again and check for new firmware.
Software Serial Esp8266 At Commands Update To TheThis project can also be used if you want to update to the latest ESP8266 Firmware.
In the same project, Ive mentioned that by default, the ESP8266 ESP-01 Module comes with an AT Command Firmware. In order to put the ESP8266 SoC in Flashing Mode, the GPIO0 Pin must be connected to GND and a momentary GND Pulse on RST Pin. And after flashing the Firmware, Ive disconnected it from GND. ![]() GPIO0 is connected to GND and in the other position, it is free to use as a GPIO. It must be connected to 3.3V. ![]() For this, we need to disconnect the GPIO0 pin from GND. IMPORTANT. Set the baud rate to 115200 and select Both NL and CR option in the serial monitor. After this press the RST Button of the ESP8266 for a second and release. The ESP8266 Module will reset and display ready after some garbage data on the serial monitor. This command will return the firmware version of the ESP8266 Module. The AT Command Set Version is 0.21.0.0 and the SDK Version is 0.9.5. The ESP8266 Firmware files are in the form of Binary Files i.e..bin files. In order to download the AT Commands Firmware for ESP8266, visit the official link here or directly download from this link. Try the procedure mentioned in this project first and if you succeed, you can try installing other ESP8266 Firmware. Software Serial Esp8266 At Commands Software Just ForEspressif Systems developed a small software just for this purpose. At the time of working on this project, I have the version 3.6.2.2. So, open the application file ESPFlashDownloadToolv3.6.2.2. The following table will give you the list of files and their corresponding addresses. For other flash sizes, please refer to the ESP8266 Getting Started Guide, from this link. Also, add the corresponding addresses in the space provided. Since I have a 1MB flash on-board, I have selected the 8Mbit (which is equal to 1MB) flash size option. If you notice in the ESP8266 Firmware Flash Tool, the moment you click on START, you will get two MAC Address as AP and STA and also information about the Module in the DETECTED INFO section. If there is any error, disconnect the USB cable, connect it once again, and after clicking on START, push the Reset button of the ESP8266.
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