Datasheet

2. UIFlow
Schematic
#include <M5Stack.h>
void setup() {
M5.begin();
dacWrite(25, 0);//disable the speak noise
pinMode(26, INPUT);// set digital pin
}
uint16_t analogRead_value = 0;
uint16_t digitalRead_value = 0;
void loop() {
analogRead_value = analogRead(36);// read analog value of EARTH
digitalRead_value = digitalRead(26);// read digital value of EARTH
}
M5Stack Docs