Logik Community

Hi Sophie. Browser-based upload requires the Arduino Create Agent (a small background application) to be running on your PC — without it, the browser has no way to access your COM port. Here is how to set it up: 1. Download and install the Arduino Create Agent from the Arduino website. 2. Once installed, make sure the agent is running — you will see a small icon in your system tray. 3. Refresh the Logik page. The port selector should now appear and detect your COM4 board automatically. 4. Select your board (Arduino Mega 2560) and COM port, then try uploading again. If the port still does not appear, check that no other application (Arduino IDE, u-center) has the COM port open — only one application can hold it at a time.

Installed the agent, enabled autostart as Kieran suggested, refreshed the page, and my COM4 appeared immediately. Code uploaded on the first try. Thanks!

Hi James, thanks for reporting this. Nadia is correct — the toolbox definition file occasionally fails to load on the first request, particularly if the login session redirect is still in progress when the editor initialises. If a hard refresh does not resolve it, try clearing site data for logik.diginto.tech (Chrome: DevTools > Application > Storage > Clear site data) and logging in fresh. We have identified the root cause and a fix is being pushed in the next update. Thanks for the patience.

Hard refresh did the trick straight away. All block categories are showing now — Logic, Loops, Variables, the GNSS blocks, everything. Thanks both.

Kieran is correct. A few things to go through in order: 1. Cross the wires: UART wiring must always be F9P-TX to Arduino-RX and F9P-RX to Arduino-TX. 2. Voltage levels: If your breakout board does not include a logic level shifter, the 5 V TX from the Mega can damage the F9P RX pin over time. 3. UART2 enabled in u-center: By default the F9P outputs NMEA on USB. Make sure you have enabled NMEA output on UART2 specifically in u-center under View > Configuration View > MSG. Set GGA and RMC at minimum on UART2. 4. Baud rate in your sketch: Make sure Serial1.begin(38400) is in your setup() and you are reading from Serial1, not Serial0. Start with step 3 even if the wiring looks correct — it is very commonly missed when the module has previously only been used via USB.

Step 3 was exactly it. UART2 output was completely disabled in u-center. Enabled GGA, RMC, and GSA on UART2, saved to flash, and the Mega is now printing NMEA sentences cleanly. Thank you!

Good addition Lucas. We recommend the Arduino Mega for all Logik builds specifically for this reason — three available hardware UARTs avoids any conflict between GPS, debug serial, and other peripherals.