我有一个项目，其中使用了Arduino UNO和esp8266-01。
Arduino用于收集水位高和水位低的传感器信息，然后将这些信息传输过来，以打开/关闭用于水阀的自锁继电器以填充我的游泳池。它还会关闭并在太阳能电池板上打开以为我的电池充电，也关闭并在esp8266上打开。
我希望每次esp8266开机时都可以连接到wifi，然后将水位传感器信息和电池水位传感器信息发送给thingSpeak。
在以下代码中，我使esp8266首次通电时尝试连接到本地wifi，但由于未提供IP和密码，因此它进入了接入点模式并打开了登录页面。我还向用户提供输入他们的somethingSpeak编写api的信息。该数据将保存到esp8266的eeprom中，以便将来自动连接并发送信息至thingSpeak。这很好。
我的问题是将水位传感器和电池水位的信息输入esp8266。我首先在Arduino上收集数据，然后让esp8266连接并使用SerialSoftware使用AT命令上传信息。但是要使AUTOCONNECT正常工作，我不得不重新编程esp8266，现在它不响应AT指令。我试图对ESP上的RX和TX引脚进行重新编程，但是当有水存在时，它只有两个读数，它的读数为1024，而无水为0。电池电量没有任何记录。我可以以某种方式使用TX和RX引脚作为模拟输入来执行此操作吗？还是可以使用Arduino上收集的信息（编号），并使用TX（arduino）和RX（ESP）将它们发送到ESP8266，以将它们发送到说话。我很茫然，需要帮助。
这是ESP8266上的代码
#include <FS.h>
#include <ESP8266WiFi.h> //https://github.com/esp8266/Arduino
#include <EEPROM.h>
//needed for library
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h> //https://github.com/tzapu/WiFiManager
#include <ArduinoJson.h>
//NEW STUFF START
char Password[36]="";
char apiKey[16]="";
WiFiClient client;
//eeprom new end
char defaultHost[100] = ""; //Thing Speak IP address (sometime the web address causes issues with ESP's :/
long itt = 500;
long itt2 = 500;
const byte wifiResetPin = 13;
int interruptPinDebounce = 0;
long debouncing_time = 1000;
volatile unsigned long wifiResetLastMillis = 0;
bool shouldSaveConfig = false;
void saveConfigCallback () {
Serial.println("Should save config");
shouldSaveConfig = true;}
void handleWifiReset(){
if(millis()<wifiResetLastMillis){
wifiResetLastMillis = millis();
}
if((millis() - wifiResetLastMillis)>= debouncing_time){
Serial.println("Clearing WiFi data resetting");
WiFiManager wifiManager;
wifiManager.resetSettings();
SPIFFS.format();
ESP.reset();
delay(1000);
}
wifiResetLastMillis = millis();
}
int addr = 0;
void setup() {
//EEPROM.begin(512); //Initialize EEPROM
WiFiManager wifiManager;
// put your setup code here, to run once:
Serial.begin(115200);
pinMode(wifiResetPin, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(wifiResetPin), handleWifiReset,FALLING);
WiFiManagerParameter customAPIKey("apiKey", "ThingSpeakWriteAPI", apiKey, 16);
//END NEW STUFF
//WiFiManager
//Local intialization. Once its business is done, there is no need to keep it around
//WiFiManager wifiManager;
//NEW STUFF START
//wifiManager.setSaveConfigCallback(saveConfigCallback);
wifiManager.addParameter(&customAPIKey);
//END NEW STUFF
//reset saved settings
//wifiManager.resetSettings();
//set custom ip for portal
//wifiManager.setAPStaticIPConfig(IPAddress(10,0,1,1), IPAddress(10,0,1,1), IPAddress(255,255,255,0));
//fetches ssid and pass from eeprom and tries to connect
//if it does not connect it starts an access point with the specified name
//here "AutoConnectAP"
//and goes into a blocking loop awaiting configuration
wifiManager.autoConnect("AutoConnectAP");
Serial.println("Connected");
//NEW STUFF START
strcpy(apiKey, customAPIKey.getValue());
if (shouldSaveConfig) {
Serial.println("saving config");
DynamicJsonBuffer jsonBuffer;
JsonObject& json = jsonBuffer.createObject();
json["defaultHost"] = defaultHost;
json["apiKey"] = apiKey;
Serial.println("API");
Serial.print(apiKey);
String apiKey2 = String(apiKey);
File configFile = SPIFFS.open("/config.json", "w");
if (!configFile) {
Serial.println("failed to open config file for writing");
}
json.printTo(configFile);
json.printTo(Serial);
delay(1000);
configFile.close();
//end save
}
Serial.println("local ip");
Serial.println(WiFi.localIP());
//END NEW STUFF
//or use this for auto generated name ESP + ChipID
//wifiManager.autoConnect();
//Serial.println("WriteApi");
//Serial.println(apiKey);
//if you get here you have connected to the WiFi
//Serial.println("K)");
//save the custom parameters to FS
strcpy(apiKey,customAPIKey.getValue());
EEPROM.begin(512); //Initialize EEPROM
// write appropriate byte of the EEPROM.
// these values will remain there when the board is
// turned off.
EEPROM.write(addr, 'A'); //Write character A
addr++; //Increment address
EEPROM.write(addr, 'B'); //Write character A
addr++; //Increment address
EEPROM.write(addr, 'C'); //Write character A
//Write string to eeprom
String www = apiKey;
for(int i=0;i<www.length();i++) //loop upto string lenght www.length() returns length of string
{
EEPROM.write(0x0F+i,www[i]); //Write one by one with starting address of 0x0F
}
EEPROM.commit(); //Store data to EEPROM
//Read string from eeprom
}
//callback notifying us of the need to save config
void loop() {
Serial.begin(115200);
WiFiManager wifiManager;
if (WiFi.status() == WL_DISCONNECTED) {
wifiManager.autoConnect("AutoConnectAP");}
delay(5000);
if (WiFi.status() == WL_CONNECTED) { Serial.println("Connected");
WiFiClient client;
long itt = 500;
long itt2 = 500;
char defaultHost[100] = "api.thingspeak.com";
//HERE IS WHERE I CHANGE THE TX AND RX PIN FUNCTION
pinMode(1, FUNCTION_3);
pinMode(3, FUNCTION_3);
//THEN I ASSIGN THEM AS INPUT PINS
pinMode(1,INPUT);
pinMode(3,INPUT);
//ASSIGN EACH PIN TO AN INTERGER
const int waterInPin = 3; // Analog input pin that the potentiometer is attached to
const int BatteryInPin = 1; // Analog input pin that the battery is attached to
int waterSensorInValue;//reading our water lever sensor
int waterSensorOutValue;//conversion of water sensor value
int BatterySensorInValue;//reading our water lever sensor
int BatterySensorOutValue;//conversion of water sensor value
// put your main code here, to run repeatedly:
waterSensorInValue = analogRead(waterInPin);
BatterySensorInValue = analogRead(BatteryInPin);
waterSensorOutValue = map(waterSensorInValue,0,1024,0,225);
BatterySensorOutValue = map(BatterySensorInValue,0,1024,0,225);
Serial.println("WaterOutValue = ");
Serial.println(waterSensorOutValue );
Serial.println("WaterInValue = ");
Serial.println(waterSensorInValue );
Serial.println("BatteryOutValue = ");
Serial.println(BatterySensorOutValue );
Serial.println("BatteryInValue = ");
Serial.println(BatterySensorInValue);
//ASSIGN THE INPUT VALUES TO UPLOAD LONGS
itt = waterSensorInValue;
itt2 = BatterySensorInValue;
EEPROM.begin(512);
Serial.println(""); //Goto next line, as ESP sends some garbage when you reset it
Serial.print(char(EEPROM.read(addr))); //Read from address 0x00
addr++; //Increment address
Serial.print(char(EEPROM.read(addr))); //Read from address 0x01
addr++; //Increment address
Serial.println(char(EEPROM.read(addr))); //Read from address 0x02
//Read string from eeprom
String www;
//Here we dont know how many bytes to read it is better practice to use some terminating character
//Lets do it manually www.circuits4you.com total length is 20 characters
for(int i=0;i<16;i++)
{
www = www + char(EEPROM.read(0x0F+i)); //Read one by one with starting address of 0x0F
}
Serial.print(www); //Print the text on serial monitor
if (client.connect(defaultHost,80))
{ // "184.106.153.149" or api.thingspeak.com
itt++; //Replace with a sensor reading or something useful
//UPLOAD TO THINGSPEAK
String postStr = www;
postStr +="&field1=";
postStr += String(itt);
postStr +="&field2=";
postStr += String(itt2);
postStr += "\r\n\r\n\r\n";
client.print("POST /update HTTP/1.1\n");
client.print("Host: api.thingspeak.com\n");
client.print("Connection: close\n");
client.print("X-THINGSPEAKAPIKEY: "+String (www)+"\n");
client.print("Content-Type: application/x-www-form-urlencoded\n");
client.print("Content-Length: ");
client.print(postStr.length());
client.print("\n\n\n");
client.print(postStr);
Serial.println("% send to Thingspeak");
}
client.stop();
Serial.println("Waiting…");
}
delay(55000);
}
正如我所说，几乎一切正常。 ESP8266在Arduino开启时打开。传感器启动并获取值。值会上传到ThingSpeak（只是一个有用的值。
任何想法，建议，示例，教程都将不胜感激。谢谢。
答案 0 :(得分：0)
我的建议是仅使用一个ESP32来完成所有这些工作。 它比使用两个微控制器要简单得多。 您可以使用ESP32读取和发送传感器数据，从而省去了通信两个不同的Micros的麻烦。