FAQ. This is the list of the most frequently asked questions.

  • The default Arduino folder (under Windows,Documents / Arduino) must contain only the Gnuvario project files; in fact, two files:
    • Gnuvario-E: contains Gnuvario-E.ino
    • libraries: the project libraries, and only these.
  • You must start the vario with the switch and without the sdcard, before connecting it to the PC via USB.
  • In the menu Tools of the Arduino IDE, the chosen card must be ESP32 Dev Module, the partition scheme Minimal SPIFFS (1.9 MB APP with OTA / 180 KB SPIFFS), and the COM port that corresponding to vario.

See the dedicated documentation

  • Start the vario with the switch, before connecting it to the PC via the USB socket, then start the compilation / flashing operation.
  • If this does not work: start the vario just when flashing will start, whether with the Arduino IDE, the PlatformIO IDE, or the ‘Flash tools’.

For example, with the IDE Arduino: wait for the line “Linking everything together …”, then switch on the vario. It is even possible to wait for the message “the selected serial port does not exist or your Arduino is not connected __…..__…..” to turn on the vario.

another example, with PlatformIO: wait for the line “Linking .pio \ build \ esp32dev \ firmware.elf”, then switch on the vario. It is even possible to wait for the message “Connecting ……..____…..” to switch on the vario.

The E-Paper screen is glued to the double-sided tape on the PCB on TTGO T5. It happens that the screen is stuck crookedly with the construction; it is possible to peel it off using a small fine cutter, and to reposition it. You can put a little alcohol on the blade to dissolve the glue.

WARNING. The screen is very thin and very fragile; it can be easily broken during this operation. In particular, do not put pressure on the screen with the cutter.

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