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add the wong lib

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This commit is contained in:
Aaron Fischer 2017-12-09 17:54:45 +01:00
parent 1f6bec5ffe
commit 8a4f73d425
5 changed files with 336 additions and 0 deletions
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176
influxdb-lib/ESP8266Influxdb.cpp Normal file
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#include "Arduino.h"
#include "ESP8266Influxdb.h"
#include <ESP8266WiFi.h>
#define DEBUG_PRINT // comment this line to disable debug print
#ifndef DEBUG_PRINT
#define DEBUG_PRINT(a)
#else
#define DEBUG_PRINT(a) (Serial.println(String(F("[Debug]: "))+(a)))
#define _DEBUG
#endif
Influxdb::Influxdb(const char *host, uint16_t port) : WiFiClient() {
_port = port;
_host = host;
}
DB_RESPONSE Influxdb::opendb(String db, String user, String password) {
_db = "db=" + db + "&u=" + user + "&p=" + password;
}
DB_RESPONSE Influxdb::opendb(String db) {
_db = "db=" + db;
}
DB_RESPONSE Influxdb::write(FIELD data) {
return write(data.postString());
}
DB_RESPONSE Influxdb::write(String data) {
if (!connect(_host, _port)) {
DEBUG_PRINT("connection failed");
_response = DB_CONNECT_FAILED;
return _response;
}
String postHead = "POST /write?" + _db + " HTTP/1.1\r\n";
postHead += "Host: " + String(_host) + ":" + String(_port) + "\r\n";
// postHead += "Content-Type: application/x-www-form-urlencoded\r\n";
postHead += "Content-Length: " + String(data.length()) + "\r\n\r\n";
DEBUG_PRINT("Writing data to " + String(_host) + ":" + String(_port));
print(postHead + data);
DEBUG_PRINT(postHead + data);
uint8_t t = 0;
// Check the reply whether writing is success or not
while (!available() && t < 200) {
delay(10);
t++;
}
if (t==200) {_response = DB_ERROR; return DB_ERROR; } // Return error if time out.
#if !defined _DEBUG
if (available()) {
_response = (findUntil("204", "\r")) ? DB_SUCCESS : DB_ERROR;
return _response;
}
#else
_response=DB_ERROR;
while (available()) {
String line = readStringUntil('\n');
if (line.substring(9,12)=="204")
_response = DB_SUCCESS;
DEBUG_PRINT("(Responsed): " + line);
}
return _response;
#endif
return DB_ERROR;
}
DB_RESPONSE Influxdb::query(String sql) {
if (!connect(_host, _port)) {
DEBUG_PRINT("connection failed");
_response = DB_CONNECT_FAILED;
return _response;
}
String url = "/query?";
#if defined _DEBUG
url += "pretty=true&";
#endif
url += _db;
url += "&q=" + URLEncode(sql);
DEBUG_PRINT("Requesting URL: ");
DEBUG_PRINT(url);
// This will send the request to the server
print(String("GET ") + url + " HTTP/1.1\r\n" + "Host: " + _host +
":" + _port + "\r\n" + "Connection: close\r\n\r\n");
// Read all the lines of the reply from server and print them to Serial
uint8_t t = 0;
while (!available() && t < 200) {
delay(10);
t++;
}
if (t==200) {_response = DB_ERROR; return DB_ERROR; } // Return error if time out.
DEBUG_PRINT("Receiving....");
uint8_t i=0;
String line = readStringUntil('\n');
DEBUG_PRINT("[HEAD] " + line);
if (line.substring(9,12) == "200") {
while (available()) {
line = readStringUntil('\n');
DEBUG_PRINT("(HEAD) " + line);
if (i < 6 ) i++; else return _response;
}
_response = DB_SUCCESS;
}
else{
_response = DB_ERROR;
#if defined _DEBUG
while (available()) {
line = readStringUntil('\n');
DEBUG_PRINT("[HEAD] " + line);
}
#endif
}
return _response;
}
DB_RESPONSE Influxdb::response() {
return _response;
}
/* -----------------------------------------------*/
// Field object
/* -----------------------------------------------*/
FIELD::FIELD(String m) {
measurement = m;
}
void FIELD::empty() {
_data = "";
_tag = "";
}
void FIELD::addTag(String key, String value) {
_tag += "," + key + "=" + value;
}
void FIELD::addField(String key, float value) {
_data = (_data == "") ? (" ") : (_data += ",");
_data += key + "=" + String(value);
}
String FIELD::postString() {
// uint32_t utc = 1448114561 + millis() /1000;
return measurement + _tag + _data;
}
// URL Encode with Arduino String object
String URLEncode(String msg) {
const char *hex = "0123456789abcdef";
String encodedMsg = "";
uint16_t i;
for (i = 0; i < msg.length(); i++) {
if (('a' <= msg.charAt(i) && msg.charAt(i) <= 'z') ||
('A' <= msg.charAt(i) && msg.charAt(i) <= 'Z') ||
('0' <= msg.charAt(i) && msg.charAt(i) <= '9')) {
encodedMsg += msg.charAt(i);
} else {
encodedMsg += '%';
encodedMsg += hex[msg.charAt(i) >> 4];
encodedMsg += hex[msg.charAt(i) & 15];
}
}
return encodedMsg;
}

72
influxdb-lib/ESP8266Influxdb.h Normal file
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/* Influxdb library
MIT license
Written by HW Wong
*/
#ifndef INFLUXDB_H
#define INFLUXDB_H
#include "Arduino.h"
#include <ESP8266WiFi.h>
enum DB_RESPONSE {DB_SUCCESS, DB_ERROR, DB_CONNECT_FAILED};
// Url encode function
String URLEncode(String msg);
class FIELD
{
public:
FIELD(String m);
String measurement;
void addField(String key, float value);
void addTag(String key, String value);
void empty();
String postString();
private:
String _data;
String _tag;
};
class Influxdb : private WiFiClient
{
public:
Influxdb(const char* host, uint16_t port);
DB_RESPONSE opendb(String db);
DB_RESPONSE opendb(String db, String user, String password);
DB_RESPONSE write(FIELD data);
DB_RESPONSE write(String data);
DB_RESPONSE query(String sql);
//uint8_t createDatabase(char *dbname);
DB_RESPONSE response();
using WiFiClient::available;
using WiFiClient::read;
using WiFiClient::flush;
using WiFiClient::find;
using WiFiClient::findUntil;
using WiFiClient::peek;
using WiFiClient::readBytes;
using WiFiClient::readBytesUntil;
using WiFiClient::readString;
using WiFiClient::readStringUntil;
using WiFiClient::parseInt;
using WiFiClient::setTimeout;
private:
uint16_t _port;
const char* _host;
String _db;
DB_RESPONSE _response;
};
#endif

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influxdb-lib/README.md Normal file
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# ESP8266Influxdb

63
influxdb-lib/examples/influxdb_write/influxdb_write.ino Normal file
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#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <ESP8266Influxdb.h>
const char *INFLUXDB_HOST = "host_or_ip";
const uint16_t INFLUXDB_PORT = 8086;
const char *DATABASE = "dbname";
const char *DB_USER = "dbuser";
const char *DB_PASSWORD = "dbpassword";
ESP8266WiFiMulti WiFiMulti;
Influxdb influxdb(INFLUXDB_HOST, INFLUXDB_PORT);
void setup() {
Serial.begin(115200);
WiFiMulti.addAP("SSID", "PASSWORD");
while (WiFiMulti.run() != WL_CONNECTED) {
delay(100);
}
Serial.println("Ready");
influxdb.opendb(DATABASE, DB_USER, DB_PASSWORD);
}
void loop() {
// Writing data with influxdb HTTP API
// https://influxdb.com/docs/v0.9/guides/writing_data.html
Serial.println("Writing data to host " + String(INFLUXDB_HOST) + ":" +
INFLUXDB_PORT + "'s database=" + DATABASE);
String data = "analog_read,method=HTTP_API,pin=A0 value=" + String(analogRead(A0));
influxdb.write(data);
Serial.println(influxdb.response() == DB_SUCCESS ? "HTTP write success"
: "Writing failed");
// Writing data using FIELD object
// Create field object with measurment name=analog_read
FIELD dataObj("analog_read");
dataObj.addTag("method", "Field_object"); // Add method tag
dataObj.addTag("pin", "A0"); // Add pin tag
dataObj.addField("value", analogRead(A0)); // Add value field
Serial.println(influxdb.write(dataObj) == DB_SUCCESS ? "Object write success"
: "Writing failed");
// Empty field object.
dataObj.empty();
// Querying Data
// https://influxdb.com/docs/v0.9/query_language/query_syntax.html
Serial.println("Querying data ........");
String sql = "select * from analog_read order by time desc limit 2";
if (influxdb.query(sql) == DB_SUCCESS) {
while (influxdb.available()) {
String line = influxdb.readStringUntil('\n');
Serial.println(line);
}
}
else
Serial.println("Query Failed");
delay(30000);
}

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influxdb-lib/keywords.txt Normal file
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##################################################
# Syntax Coloring Map For ESP8266 Influxdb library
##################################################
##################################################
# Datatypes (KEYWORD1)
##################################################
Influxdb KEYWORD1
FIELD KEYWORD1
DB_RESPOND KEYWORD1
##################################################
# Methods and Functions (KEYWORD2)
##################################################
addField KEYWORD2
addTag KEYWORD2
empty KEYWORD2
opendb KEYWORD2
write KEYWORD2
query KEYWORD2
postString KEYWORD2
response KEYWORD2