This application: – displays an image and then a timed sequence of screens of different colors (red, blue, green), – displays the power voltage on short-pressed GPIO 35 button, – puts the ESP32 to sleep on the GPIO 35 button long press, – launches a WiFi scan on short press of the GPIO 0 button and displays the result.
This interface box allows to connect through the YAESU FT-857D’s CAT (Computer Aided Transceiver) mini-din 8, both a serial wired link to a computer and a PTT line to an amplifier. It also includes a Bluetooth module to replace the serial wired link if necessary.
A display of some Yaesu FT-857D’s parameters was developed for a 4×20 LCD screen. The software implements via the serial link the FT-857D CAT (Computer Aided Transceiver) controls and additional readings of the transceiver’s EEPROM. The developments were made from a source code developed for Arduino by VE3BUX.