IoT開発(5)
ESP-WROOM-02をDeepSleepで長時間駆動させる

#include <SPI.h>
#include <ESP8266WiFi.h>
#include <Wire.h>
#include "Ambient.h"

extern "C" {
#include "user_interface.h"
}

#define _DEBUG 0
#if _DEBUG
#define DBG(...) { Serial.print(__VA_ARGS__); }
#define DBGLED(...) { digitalWrite(__VA_ARGS__); }
#else
#define DBG(...)
#define DBGLED(...) { digitalWrite(__VA_ARGS__); }
//#define DBGLED(...)
#endif /* _DBG */

#define LED 4
#define ERR_LED 5
#define CS_E  15

const char* ssid = "Buffalo-G-D0F8";
const char* password = "prjhgbvtvcich";

unsigned int channelId = 23197;
const char* writeKey = "39f9577973a01df0";

WiFiClient client;
Ambient ambient;

const float temperature_min = -55.0;
const float temperature_max = 150.0;

void setup()
{
	#ifdef _DEBUG
	Serial.begin(115200);
	delay(20);
	#endif
	DBG("Start");
	pinMode(LED, OUTPUT);
	pinMode(ERR_LED, OUTPUT);

	WiFi.begin(ssid, password);

	int i = 0;
	while (WiFi.status() != WL_CONNECTED) {
		delay(500);

		DBGLED(LED, i++ % 2);
		DBG(".");
	}

	DBGLED(LED, LOW);
	DBGLED(ERR_LED, LOW);
	DBG("WiFi connected\r\n");
	DBG("IP address: ");
	DBG(WiFi.localIP());
	DBG("\r\n");

	ambient.begin(channelId, writeKey, &client);

	DBG("Set SPI to communicate with MDK001");
	DBG("\r\n");
	pinMode(CS_E, OUTPUT);
	digitalWrite(CS_E, HIGH);

	//Initialize SPI configuration.
	SPI.begin();
	SPI.setDataMode(SPI_MODE3);
	SPI.setBitOrder(MSBFIRST);
	SPI.setClockDivider(SPI_CLOCK_DIV8);

	digitalWrite(CS_E, LOW);
	SPI.transfer(0x54);

	delay(240);
}

float get_temperature()
{
	uint16_t readVal = 0;
	float temp = 0;

	readVal = (uint16_t)SPI.transfer(0) << 8; //Upper 8bit.
	readVal = readVal | SPI.transfer(0);
	DBG("readVal = ");
	DBG(readVal, HEX);
	DBG("\r\n");

	readVal = readVal >> 3;

	if (0x1000 & readVal) {
		readVal = (uint32_t)readVal - 8192;
	}
	temp = ((float)((int16_t)readVal)) / 16.0;

	return temp;
}

void loop()
{
	DBGLED(LED, 1);
	DBGLED(ERR_LED, 0);
	uint16_t readVal = 0;

	float temp = 0;

	/*
	 *  測定結果が、センサーの「精度」の範囲に収まっているか確認する。 
	 *  収まっていない場合には、再度測定を実施しなおす。
	 *  (ただし、測定の間隔は1秒空ける。)
	 */
	do {
		DBGLED(ERR_LED, 1);
		temp = get_temperature();
		DBG("temp = ");
		DBG(temp, HEX);
		DBG("\r\n");

		delay(1000);
	} while((temp < temperature_min)|| (temperature_max < temp));
	DBGLED(ERR_LED, 0);

	ambient.set(1, temp);
	ambient.send();

	DBGLED(LED, 0);

	//Sleep 5 minutes.
	ESP.deepSleep(5 * 60 * 1000 * 1000, WAKE_RF_DEFAULT);  

	delay(1000);  //Dummy.
}

typedef enum {
	NONE_SLEEP_T	= 0,
	LIGHT_SLEEP_T,
	MODEM_SLEEP_T
} sleep_type_t;