Untested way of disabling power management of an esp32

main.cpp

#include <Arduino.h>
#include <esp_pm.h>

void setup()
{
    Serial.begin(115200);
    Serial.setDebugOutput(true);

    esp_pm_lock_handle_t powerLock;
    if (esp_pm_lock_create(ESP_PM_CPU_FREQ_MAX, 0, "", &powerLock) != ESP_OK) {
        Serial.println("failed to create lock");
    }
    if (esp_pm_lock_acquire(powerLock) != ESP_OK) {
        Serial.println("failed to aquire lock");
    }
}