This Web based spectrum analyzer with ESP32 8-64 channels uses a ESP32 DEVKIT V1 and only 4 external components. Using the switch, you can select the number of bands you want to display on the webinterface 8,16,24,32 or 64 Uppon first boot, the wifi manager will kick in asking your WIFI credentials. If it doesn’t, you can force the manager to start by holding the mode button while rebooting.
This is an open source project, all schematics, software and building instructions are available for you.…