Why flashing your ESP8266 module with NodeMCU NodeMCU is a firmware that allows you to program the ESP8266 modules with LUA script. And youll find it very similar. ESP8. 26. 6 Reflash Dance XESS Corp. Dave Vandenbout. Its been a while since I connected my ESP8. ZPUino soft processor running in a Xu. LA2 board. I thought I would update the firmware on the ESP8. Since everyone is compiling new applications for the Espressif chip now, merely reprogramming the serial flash on the board should be easy, right Just download a binary file and youre done It turned out to be a bit more confusing. Note 1 If you would rather watch than read, there is a video at the end of this post that goes through the flash reprogramming process. Note 2 Heres a newer post about building the hardware and reprogramming an ESP 2. Arduino IDE. Part of the confusion is that there are a lot of different programming tools being used binary executables, Python scripts, whatever. Some tools require specifying four different binary files, one for each particular address range of the flash chip. But the downloadable archives dont usually have four files in them, and if they do, they dont have filenames matching the ones shown in the examples. I didnt want to brick my modules, even if they only cost 2. Finally, I settled on using the Espressifs official esp. I also downloaded the v. AT Firmware. bin file. After dumping the contents of both archives into a local directory, I had this Double clicking the esp. Clicking the Bin button opened a window where I selected the binary file to download into the serial flash of the board Selecting the v. AT Firmware. bin file and clicking Open took me back to the main window with the firmware file displayed in the Bin field. Next I needed to put the ESP8. This is done by resetting the ESP8. Software Serial Esp8266 Firmware' title='Software Serial Esp8266 Firmware' />NodeMCU ist ein WLANBoard mit ESP8266Modul, welches sehr leicht per Arduino IDE programmiert werden kann. Dieses Tutorial zeigt Beispiele mit Farbdisplay. GPIO0 pin low. I could do this with a few wires and a breadboard but, since I might be doing this more than once, I decided to build a little programming board. It has a 4 2 socket for the ESP8. Stunt In Activa Videos more. C2. 32. HM USB to serial cable is attached. A couple of 2. 2 KOhm pullup resistors for the chip select and reset pins keep the ESP8. PROG and RESET pushbuttons are provided to momentarily pull the GPIO0 and reset pins input to ground, respectively. After inserting my ESP8. C2. 32. HM cable, I entered the flash programming mode by holding down the PROG button and then pressing and releasing the RESET button. In the flashing tool, I changed the serial port from COM1 to COM6 because thats where the CH2. 102 Dalmatian Game. HM cable resides on my system. Windows 7 With Product Key on this page. Clicking on the Download button started the reprogramming of the flash chip. The progress was displayed in the lower pane of the window and, after about a minute, the reprogramming was done. Note that the progress pane indicated Failed to leave flash mode. Thats probably because the flashing program doesnt have any way to bring the ESP8. But its not really a problem provided the contents of the flash chip were rewritten. To verify the flash programming was successful, I needed to talk to the chip and query the firmware version. I closed the flash programming window and pressed the RESET button without pressing the PROG button to place the ESP8. Then I brought up a Pu. TTY window and configured it as shown below. Note that I set the speed to 9. The new firmware defaults to this communication rate rather than the 1. Kbps rate used in the factory installed firmware. After opening the Pu. Software Serial Esp8266 Firmware' title='Software Serial Esp8266 Firmware' />TTY terminal window, I sent the ESP8. ATRST and then had it print the firmware version ATGMR. The version was shown to be 0. So the firmware update appeared to have worked. In order to push the transfer speed of the board back up to 1. Kbps since the ZPUino can handle that speed, theres no need to cripple the interface, I used the ATCIOBAUD1. Then I checked that the change took using the ATCIOBAUD Observe that it required two attempts to change the baud rate, so dont be put off if that happens to you. The baud rate is stored in nonvolatile memory so it will remain in effect from then on, even if the power is interrupted or a reset occurs. With the new firmware in place and the baud rate back at 1. Kbps, I took the ESP8. Software Serial Esp8266 Firmware' title='Software Serial Esp8266 Firmware' />ZPUino development board. Now it was just a matter of running my existing program that downloads the contents of a web page over the wireless link, right Wrong It turned out the update of the ESP8. The SparkFun ESP8266 WiFi Shield is an Arduino compatible shield for the ESP8266 WiFi SoC a leading platform for Internet of Things IoT or WiFirelat. Plotting LM35 temperature data on ThingSpeak with an Arduino and ESP8266 WiFi module. This post is about a DIY project Flashing a new NodeMCU firmware on the ESP8266, learn to write lua scripts and making the ESP8266 control a water heater. This is a project of an Equalizer Display, with MSGEQ7 chip controlled by ESP8266 with the NodeMCU firmware LUA. The EQ colors can be controlled via WiFi. AT commands to the ESP8. M, ctrl J or carriage return, linefeed instead of n. After initiating a reset using the ATRST command, the string the ESP8. While making those changes, I also had to fix my code for timing out if no characters were received from the ESP8. The updated program can be found here. So after all that, I finally had an updated Wifi module and a working example. I hope this procedure helps if you decide to update your own ESP8. Finally, if youre someone who would rather watch than read, then heres a video showing the entire process of updating the ESP8. Share on Twitter. Share on Facebook.