You should get some gibberish and then a “ready” word (you may get other strings depending on firmware). Power off the module, disconnect the GPIO0 pin and power it on.
Esp8266 firmware load settings serial#
Connect with a terminal emulator software of your choice to the serial port that connects to ESP8266 (I use RealTerm). You can switch between normal work mode and flash mode by removing/connecting GND-GPIO0 connection and power cycling the module.īefore actually updating the firmware I checked the current firmware version on the module.
My power regulator also has a power switch which elegantly lets you power on / power off (reset) the module without removing any wires. I suggest you to connect everything before powering up to prevent damage to the module. PSU GND – ESP8266 GPIO0 (should be connected for flashing operation) In addition to the normal connections you also have to pull down (connect to GND) the GPIO0 pin. The connection for the flashing is slightly different than the normal connection. Actually the flashing process should take less power than connecting to WIFI so you may be safe here I however have not tested it.) If the flashing goes wrong your device may be rendered useless so you should be careful 😉 (You may also use arduino as both the power source and USB-serial converter, I have used it in my previous posts as a power source. Next you need to connect your wifi module via serial to USB converter to computer (I use CP2102) and provide it with some quality power supply (I use breadboard 3V/5V power regulator with external wall-wart). (The links may get updated sometimes so if they don’t work check here >) Both files can be found on this page.
Esp8266 firmware load settings update#
Download the firmware update tool and the latest firmware binary. The new firmware supposedly features adjustable baudrate and also a few bug fixes.įirst you need to prepare yourself for the firmware upgrade. The problem with the original firmware is that the serial port baudrate is fixed at 115200 which is way too fast for the softserial library and even too fast for uno’s normal serial port to be reliable.
So today I figured I could update firmware on my ESP8266 to make it useful for work with the arduino uno.
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