ESP8266 Community Forum

- Tue Feb 12, 2019 8:11 pm #80545 Hi,

I'm trying to follow the DIY instructions from Lufdaten--a project of homemade sensors measuring air quality--to set up the Wi-fi module for my dust and temperature sensor devices.
https://luftdaten.info/en/construction- ... figuration

I've installed the Arduino IDE & Boards ESP8266 as instructed. I'm lost however when it comes to import the data collection firmware onto the NodeMCU board itself (and yes, I've it connected to my laptop).

This is the code they're referencing:

Code: Select allLinux: ~ / .arduino15 / packages / esp8266 / tools / esptool / 0.4.9 / esptool -vv -cd nodemcu -cb 57600 -ca 0x00000 -cp /dev/cu.wchusbserial1410 -cf /path/to/firmware/file (the port behind, -cp ‘ may need to be adjusted)

I'm executing the code in my root directory and set-up the filepath properly to the firmware's location. However I keep getting:

Code: Select allbash: /home/COMPUTER: Is a directory

It's probably something silly but I've never done this before. I'm guessing that the command is moving files onto the NodeMCU and executing the firmware installation there? I would appreciate your insights, thanks!

SOLUTION

Step 1: cd into the hidden file directory where esptool is located

Code: Select allcd ~/.arduino15/packages/esp8266/tools/esptool/0.4.9


Step 2: install the bootloader software (i.e. esptool)

Code: Select allpip install esptool


Documentation: https://github.com/espressif/esptool/bl ... /README.md

Step 3: Run the command to flash the firmware on Arduino

Code: Select allesptool --port /dev/ttyUSB0 write_flash 0x0000 ~/Downloads/latest_en.bin


Make sure to specify the correct port; open the ArduinoIDE and check Tools > Port, then Tools > Get board info to check whether the Arduino is recognized.

Make sure to write the correct directory path to the firmware.

IF THE FOLLOWING ERROR ARISES:

Code: Select all[Errno 13] could not open port /dev/ttyUSB0: [Errno 13] Permission denied: '/dev/ttyUSB0'

then change permission privileges with

Code: Select allsudo chmod 666 /dev/ttyUSB0

Reference: https://stackoverflow.com/questions/278 ... -from-pyth

The Arduino’s LED should be blinking while the firmware is uploaded on the board.