Why does starting the serial monitor restart the sketch? Arduino serial port reset in Serial monitor & Python. Connecting to the COM port the Arduino. Getting started with the Arduino. The Tools > Serial Port menu. Installing the Arduino Sam. To-Serial activates the Erase and Reset sequence before it. Well it depends on your software logic. Lets say you are controlling your arduino from smartphone via wifi/bluetooth. You send a command from your phone to change (lets say) the wifi ssid or password it is connecting to. You get that command in arduino, store the new ssid/password in eeprom or sd card and RESET your arduino. DisablingAutoResetOnSerialConnection So you have found need for disabling the auto reset? So that the arduino does not reset when establishing a connection. Here are some solutions. Note: This does NOT apply to the new Arduino Leonardo that uses USB and serial differently. The Leonardo does not auto-reset, however, it is difficult to make Leonardo reset even if desired. See the bottom of this page for Leonardo-specific issues with reset. The simple way that doesn't require any permanent modifying of your hardware or software configuration changes: Stick a 120 ohm resistor in the headers between 5v and reset (you can find these on the isp connector too). Rbno2 font family free.
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