![]() ![]() The DTR and RTS lines are configured differently Your hardware does not have the DTR and RTS lines connected to GPIO0 and CHIP_PU However, esptool.py is not able to reset your hardware automatically in the following cases: In general, you should have no problems with the official esp-idf development boards. As an example, check the schematic for the ESP32 DevKitC development board. ![]() The DTR and RTS control lines are in turn connected to GPIO0 and CHIP_PU (EN) pins of ESP32, thus changes in the voltage levels of DTR and RTS will boot ESP32 into Firmware Download mode. One simple solution to try is manual reset described below, and if it does not help you can find more details about possible issues in Troubleshooting.Įsptool.py resets ESP32 automatically by asserting DTR and RTS control lines of the USB to serial converter chip, i.e., FTDI or CP210x (for more information, see Establish Serial Connection with ESP32). One of the reasons might be issues encountered by esptool.py, the utility that is called by the build system to reset the chip, interact with the ROM bootloader, and flash firmware. Open dos window and execute swig -version to verify.If you run the given command and see errors such as “Failed to connect”, there might be several reasons for this.Click Environment Variables button, then double click Path system variable and add the above swig unzip folder path value at the variable value end, remember use to separate.Click Advanced System Settings in opened window left panel.Right-click Computer in the file explorer, then clicks Properties menu item in the popup menu list.Add above swig unzip directory path to system environment variable Path values.Unzip the zip file into a local folder such as C:\\swig-3.0.12.Go to swig-win download page to download the swig installer windows version.Make SWIG_PATH, PATH environment variable settings take effect.sudo vim /etc/profileĮxport SWIG_PATH=/home/Jerry/library/swigtool/bin Add SWIG_PATH environment variable, also add it in PATH environment variable.Specify swig install directory./configure -prefix=/home/Jerry/library/swigtool.Unzip the swig zip source code to a local directory.Go to the swig download page to download Linux version swig installation package.sudo apt-get install libpcre3 libpcre3-dev Install g if you do not install it already.Run swig -version in terminal to verify swig installation.Run the below command to install HomeBrew in MacOS.The macOS use HomeBrew to manage software installation, so you need to install HomeBrew first and then install swig. ![]()
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