Programming ESP32 dev board: I recomend using terminal and execute command instead programming with IDE as sometimes the COM programming fails and the IDE takes long to compile and try to upload again ...
ADS1256 adc (clockSpeed in Mhz, VREF in volt, boolean if use RESET PIN ): Class Constructor, specify the clockspeed (depends on your board, the reference voltage of the ADC, and if youare conecting ...