Cactus

#include <ESP8266WiFi.h>
#include "Adafruit_Si7021.h"

#define EN 2  // GPIO02 on ESP-01 module, D4 on nodeMCU WeMos
#define USERBUTTON 12  // GPIO012 on ESP or D6 on WeMos

int dataPin = 13;  // pin D7 `GPIO13` on NodeMCU boards
int clockPin = 14;  // pin D5 `GPIO14` on NodeMCU boards
int latchPin = 15;  // pin D8 `GPIO15` on NodeMCU boards

Adafruit_Si7021 sensor = Adafruit_Si7021();

void setup() {
  Serial.begin(115200);
  Serial.setTimeout(2000);
  while (!Serial) { }

  int userButtonValue = digitalRead(USERBUTTON);

  Serial.println("\n\nTest 1/10: It expects to wake up periodically");

  if (userButtonValue == 0) {
    Serial.println("Test 10/10: It expects to wake up on user long press");
  }

  initShiftRegister();
  initTempHumiditySensor();

  // Test 5 LEDs and shift register
  displayLED(0);
  delay(500);

  Serial.println("Test 2/10: It expects to make LED 1 ON");
  displayLED(1);
  delay(500);

  Serial.println("Test 3/10: It expects to make LED 1, LED 2 ON");
  displayLED(3);
  delay(500);

  Serial.println("Test 4/10: It expects to make LED 1, LED 2, LED 3 ON");
  displayLED(7);
  delay(500);

  Serial.println("Test 5/10: It expects to make LED 1, LED 2, LED 3, LED 4 ON");
  displayLED(15);
  delay(500);

  Serial.println("Test 6/10: It expects to make all 5 LEDs ON");
  displayLED(31);
  delay(500);
}

void loop() {
  displayTempHumidity();
  disableLEDs();

  Serial.println("Test 9/10: It expects to go to sleep for 10 seconds");
  Serial.println("[INFO] Press user button to test wakeup on button press!");
  Serial.println("");
  Serial.println("");
  ESP.deepSleep(10e6);
}

void initShiftRegister() {
  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(dataPin, OUTPUT);

  pinMode(EN, OUTPUT);
  digitalWrite(EN, LOW);
}

void initTempHumiditySensor() {
  if (!sensor.begin()) {
    Serial.println("Did not find Si7021 sensor!");
    while (true) {}
  }
}

void displayLED(int lednumber) {
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, lednumber);
  digitalWrite(latchPin, HIGH);
}

void displayTempHumidity(void) {
  Serial.print("Test 7/10: It expects to read the current temperature ");
  Serial.print(sensor.readTemperature());
  Serial.print("C and humidity ");
  Serial.print(sensor.readHumidity());
  Serial.println(" RH%");

  int barHumidity = sensor.readHumidity()/20 + 1;
  String sBar = String(barHumidity) + " LEDs";
  Serial.print("Test 8/10: It expects to display the sensor values with ");
  Serial.println(sBar);

  displayLED(pow(2, barHumidity) -1);
  delay(5000);
}

void disableLEDs(void) {
  digitalWrite(EN, LOW);
  displayLED(0);
}

.PHONY: lint compile upload clean

lint:
	cpplint --extensions=ino --filter=-legal/copyright *.ino

compile:
	arduino-cli compile --fqbn esp8266com:esp8266:d1_mini ./

upload:
	arduino-cli upload -p /dev/cu.wchusbserial1410 --fqbn esp8266com:esp8266:d1_mini ./

clean:
	rm -f .*.bin
	rm -f .*.elf

flash: lint compile upload clean