Hello!

I've used a demo board only and frequency sweeping technique [based on the TIM1 of the STM8S MCU]. It generates frequency in range from 325Hz to about 170 kHz whith different step in each subrange to measure the response of the load [with using the ADC and a simple rectifier based on 1N5819 Schottky diode].

To display a chart I've added the small OLED display with I2C interface.