Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
MCP3425(ADC)+ LM60BIZ + esp8266, driver
/*
esp8266_mcp3425_v2.ino
MCP3425(ADC)+ LM60BIZ + esp8266
*/
#include <ESP8266WiFi.h>
#include<Wire.h>
extern "C" {
#include <user_interface.h>
}
// MCP3425 I2C address is 0x68(104)
#define Addr 0x68
const char* ssid = "";
const char* password = "";
const char* host = "api.thingspeak.com";
String mAPI_KEY="your-KEY";
static uint32_t mTimerTmp;
static uint32_t mTimerPost;
float mTemp=0;
float mHum=0;
//
void proc_http(String sTemp ){
WiFiClient client;
const int httpPort = 80;
if (!client.connect(host, httpPort)) {
Serial.println("connection failed");
return;
}
String url = "/update?key="+ mAPI_KEY + "&field1="+ sTemp;
client.print(String("GET ") + url + " HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"Connection: close\r\n\r\n");
delay(10);
int iSt=0;
while(client.available()){
String line = client.readStringUntil('\r');
Serial.print(line);
}
}
//
void setup()
{
Wire.begin();
Serial.begin(9600);
Serial.println("#Start-setup");
// Start I2C Transmission
Wire.beginTransmission(Addr);
Wire.write(0x10);
Wire.endTransmission();
delay(300);
//WIFI
Serial.println();
Serial.println();
Serial.print("Connecting to ");
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.print("millis.Connected: ");
Serial.println(millis() );
}
//
int get_tempValue(){
int iRet=0;
unsigned int data[2];
Wire.beginTransmission(Addr);
Wire.write(0x00);
Wire.endTransmission();
//
Wire.requestFrom(Addr, 2);
if(Wire.available() == 2)
{
data[0] = Wire.read();
data[1] = Wire.read();
}
// Convert the data to 12-bits
int raw_adc = (data[0] & 0x0F) * 256 + data[1];
if(raw_adc > 2047)
{
raw_adc -= 4096;
}
Serial.print("Digital Value of Analog Input : ");
Serial.println(raw_adc);
//Sensor
int iTemp = (raw_adc - 424) / 6.25; //電圧値を温度に変換, offset=425
Serial.print( "iTemp=" );
Serial.println( iTemp );
iRet= iTemp;
return iRet;
}
//
void loop()
{
int iTemp =0;
if( millis() > mTimerTmp){
mTimerTmp += 5000;
iTemp =get_tempValue();
}
if (millis() > mTimerPost ){
//mTimerPost += 3000;
mTimerPost += 60000;
iTemp =get_tempValue();
delay(1000);
proc_http( String(iTemp) );
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.