【发布时间】：2019-01-30 22:50:51
【问题描述】：
我目前正在尝试使用倾斜传感器设置发酵比重监测器。该过程可能需要数周时间，并且必须包含在无菌容器中，因此必须使用电池供电。我正在使用稍微修改过的 ESP8266-01，它进入睡眠模式，然后每小时唤醒一次以进行测量、传输数据并返回睡眠模式。我正在使用 MPU6050 作为倾斜传感器。首先，当esp关闭时，我似乎无法将mpu置于睡眠模式，它似乎总是需要大约4mA，其次，我只需要一个轴，是否可以禁用其他所有功能以进一步限制功耗？我似乎在手册中找不到任何禁用轴的内容，只能校准它们。我的代码在下面
用下面的寄存器做实验似乎没有什么区别，添加它们，完全取出它们，仍然需要大约 4mA。尝试设置为 1 以使 mpu 在循环结束时进入睡眠状态，但没有区别。 Wire.write(0x6B); Wire.write(0);
我对此很陌生，当手册在 addr 6b 中引用 bit6 时，我很难解释手册，我如何设置 bit 6？
如果我可以将 mpu 限制为仅 1 个轴，没有加速，并且在测量之间进入深度睡眠，我应该能够获得大约 0.5mA 的功耗，这让我使用单个 18650 获得良好的电池寿命。任何建议都是非常感谢！
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include "MPU6050.h"
#include "I2Cdev.h"
#include "Wire.h"
// Update these with values suitable for your network.
const char* ssid = "****";
const char* password = "******";
IPAddress server(192, 168, 1, 90);
WiFiClient espClient5;
PubSubClient client(espClient5);
long lastMsg = 0;
char msg[50];
const uint8_t scl = 5; //D1
const uint8_t sda = 4; //D2
int val;
int prevVal = 0;
String pubString;
char gravity[50];
MPU6050 mpu;
const int sleepTimeS = 10; //only 10 seconds for testing purposes, set to
1hr when operational
int counter=0;
int16_t ax, ay, az;
int16_t gx, gy, gz;
void setup_wifi() {
delay(10);
// We start by connecting to a WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
randomSeed(micros());
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void callback(char* topic, byte* payload, unsigned int length) { //not
required in this application
}
void reconnect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
// Create a random client ID
String clientId = "test";
clientId += String(random(0xffff), HEX);
// Attempt to connect
if (client.connect(clientId.c_str())) {
Serial.println("connected");
// Once connected, publish an announcement...
client.publish("AliveRegister", "FermentMon");
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
// Wait 5 seconds before retrying
delay(5000);
}
}
}
#define ONE_WIRE_BUS 2 // D4 on physical board
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature DS18B20(&oneWire);
float prevTemp = 0;
void setup() {
counter = 0;
Serial.begin(9600);
Wire.begin(0,2);
Wire.write(0x6B); //PWR_MGMT_1 register
Wire.write(0); // set to zero wakes teh 6050
Wire.endTransmission(true);
delay(100);
setup_wifi();
client.setServer(server, 1883);
client.setCallback(callback);
if (!client.connected()) {
reconnect();
}
Serial.println("Initialize MPU");
mpu.initialize();
Serial.println(mpu.testConnection() ? "Connected" : "Connection failed");
float temp;
DS18B20.requestTemperatures();
temp = DS18B20.getTempCByIndex(0); // first temperature sensor
char buff[100];
dtostrf(temp, 0, 2, buff);
temp = temp + 0.5;
int tRound = int(temp);
client.publish("Fermenter/temperature", buff);
Serial.print("Fermenter Temperature: ");
Serial.println(temp);
prevTemp = tRound;
mpu.getMotion6(&ax, &ay, &az, &gx, &gy, &gz);
val = map(ax, -17000, 17000, 0, 180);
pubString = String(val);
pubString.toCharArray(gravity, pubString.length() + 1);
client.publish("Fermenter/angle", gravity);
Serial.print("Gravity angle: ");
Serial.println(val);
delay(500);
// counter = counter+1;
Serial.println("sleep mode");
Wire.write(0x6B); //PWR_MGMT_1 register
Wire.write(1); // set to zero wakes teh 6050
// sleep
ESP.deepSleep(sleepTimeS * 1000000);
delay(2000);
}
void loop() {
client.loop();
}
【问题讨论】：