MK-312WS

ESP32 based webserver as replacement for the HC05/06 inside a MK-312BT.

Can join a WPA2 encrypted WLAN, or be it's own AP. For now does the knobs, program, ramp and battery level.

Planned features:

• Ramp parameters.
• Other advanced parameters, like freq and width.
• Powerlevel.
• User program upload.
• MA ramp.
• Interaction recording / playback.

Requirements:

• ESP32 devboard. I recommend the "ESP32 mini", 2x2x10 pins. Like https://www.az-delivery.de/en/products/esp32-d1-mini, does get sold under different brands.
• Levelshifter, 5V to 3.3V. Already part of the carrier board. Turns out levelshifting isn't needed, as there's already a voltage divider on the boxes TX line.
• Arduino IDE with the ESP32 board package and the filesystem uploader (https://randomnerdtutorials.com/install-esp32-filesystem-uploader-arduino-ide/).

Howto:

• Flash the sketch.
• Flash the filesystem.
• Replace the BT module in the mk312. Remember to levelshift RX if you aren't using the carrier board.
• Connect to the new AP. SSID is the modules MAC address, pw is 12345678.
• Open http://192.168.4.1/config. Change the SSID if you want to continue AP mode, SSID and password to connect to a preexisting network. WARNING: For now AP mode will always use the default password of 12345678, as there is no easy other way to change a forgotten password.
• Open http://mk-312ws.local (or the respective new hostname if you changed it) and start zapping.