#include <ESP8266WiFi.h>;
#include <WiFiClient.h>;
#include <ThingSpeak.h>;
const char* ssid = "Wifi_Project"; //Your Network SSID
const char* password = "1111aaaa"; //Your Network Password
WiFiClient client;
unsigned long myChannelNumber = 1947152; //Your Channel Number (Without Brackets)
const char * myWriteAPIKey = "QA02MFMGFJVIDBZR"; //Your Write API Key
#include <SoftwareSerial.h>
SoftwareSerial SMESerial (D6, D7);
int xVal, yVal, zVal;
float xtotal,ytotal,ztotal,xprice,yprice,zprice;
void setup() {
Serial.begin(9600);
SMESerial.begin(9600);
WiFi.begin(ssid, password);
ThingSpeak.begin(client);
}
void loop() {
if (SMESerial.available()<1) return;
char R=SMESerial.read();
int data=SMESerial.parseInt();
if (R == 'x')
xVal = data;
xtotal = xVal + xtotal;
xprice = xtotal*0.1;
Serial.print("X = ");
Serial.println(xtotal);
ThingSpeak.setField(1, xtotal);
ThingSpeak.setField(2, xprice);
if (R == 'y')
yVal = data;
ytotal = yVal + ytotal;
yprice = ytotal*0.1;
Serial.print("Y = ");
Serial.println(ytotal);
ThingSpeak.setField(3, ytotal);
ThingSpeak.setField(4, yprice);
if (R == 'z')
zVal = data;
ztotal = zVal + ztotal;
zprice = ztotal*0.1;
Serial.print("Z = ");
Serial.println(ztotal);
ThingSpeak.setField(5, ztotal);
ThingSpeak.setField(6, zprice);
ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
}
I've made a wireless sensor networks project by using 3 slave nodemcu esp8266 to collect current reading using ACS712 and send it to master nodemcu esp8266. The master nodemcu should send data to phone to view the data through a mobile application. I used Thingspeak at first to view data of the power consumption but i want to use google firebase to view the power consumption easier for my application view. Need help please.
Related
I'm trying to write a program for my ESP32 that writes to InfluxDB but also maintains an OTA access server and it appears that the two functions are having some impact on each other that's causing the OTA server to not work (i.e. the OTA page does not appear when I enter the IP address into the browser). I've narrowed the problem down to the
client.writePoint(sensor)
function that InfluxDB uses to write data to buffer and I'm unsure of how to remedy that. The OTA functionality works when I comment out the line that references the above function. I've included this code below.
//PASTE THIS IN ABOVE EXISTING HEADERS
//#include <WiFi.h> //if file already has these libraries, remove it from one of the places
#include <WiFiClient.h>
#include <WebServer.h>
#include <ESPmDNS.h>
#include <Update.h>
const char* host = "esp32";
const char* ssid = "ssid";
const char* password = "pwd";
WebServer server(80);
// end OTA header file
//BEGIN HEADER FILE
#if defined(ESP32)
#include <WiFiMulti.h>
WiFiMulti wifiMulti;
#define DEVICE "TEST"
#elif defined(ESP8266)
#include <ESP8266WiFiMulti.h>
ESP8266WiFiMulti wifiMulti;
#define DEVICE "ESP8266"
#endif
#include <InfluxDbClient.h>
#include <InfluxDbCloud.h>
/* Self inclusions -> Not from InfluxDB */
#define Vdd 3.3
#define Aout 35
#define LINEAR LOW
#define SQ_ROOT HIGH
const int R_0 = -1812; //Change this to your own R0 measurements
#include "max6675.h"
#include <WiFi.h>
#include <WiFiUdp.h>
/* End Self Inclusions */
// InfluxDB v2 server url, e.g. https://eu-central-1-1.aws.cloud2.influxdata.com (Use: InfluxDB UI -> Load Data -> Client Libraries)
#define INFLUXDB_URL "url"
// InfluxDB v2 server or cloud API authentication token ( Data -> Tokens -> MQ Sensors)
#define INFLUXDB_TOKEN "token"
// InfluxDB v2 organization id (Use: InfluxDB UI -> User -> About -> Common Ids )
#define INFLUXDB_ORG "org"
// InfluxDB v2 bucket name (Use: InfluxDB UI -> Data -> Buckets)
#define INFLUXDB_BUCKET "bucket"
// Set timezone string according to https://www.gnu.org/software/libc/manual/html_node/TZ-Variable.html
// Examples:
// Pacific Time: "PST8PDT"
// Eastern: "EST5EDT"
// Japanesse: "JST-9"
// Central Europe: "CET-1CEST,M3.5.0,M10.5.0/3"
#define TZ_INFO "EST5EDT"
// InfluxDB client instance with preconfigured InfluxCloud certificate
InfluxDBClient client(INFLUXDB_URL, INFLUXDB_ORG, INFLUXDB_BUCKET, INFLUXDB_TOKEN, InfluxDbCloud2CACert);
// Data Point
Point sensor("VOC_data"); // Data point
// END HEADER FILE
void setup() { //make sure this line appears one time only
Serial.begin(115200); //make sure there are not two serial/begin functions in setup
Serial.println("started"); //TS COMMENT
// Connect to WiFi network
WiFi.begin(ssid, password);
Serial.println("");
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("\n\nACCESS UPDATES AT: http://");
Serial.print(WiFi.localIP());
Serial.println("\n\n");
pinMode(Aout, INPUT);
// Add tags
sensor.addTag("device", DEVICE);
// Accurate time is necessary for certificate validation and writing in batches
// For the fastest time sync find NTP servers in your area: https://www.pool.ntp.org/zone/
// Syncing progress and the time will be printed to Serial.
timeSync(TZ_INFO, "pool.ntp.org", "time.nis.gov");
// Check server connection
if (client.validateConnection()) {
Serial.print("Connected to InfluxDB: ");
Serial.println(client.getServerUrl());
} else {
Serial.print("InfluxDB connection failed: ");
Serial.println(client.getLastErrorMessage());
}
/*use mdns for host name resolution*/
if (!MDNS.begin(host)) { //http://esp32.local
Serial.println("Error setting up MDNS responder!");
while (1) {
delay(1000);
}
}
Serial.println("mDNS responder started");
/*return index page which is stored in serverIndex */
server.on("/", HTTP_GET, []() {
server.sendHeader("Connection", "close");
server.send(200, "text/html", loginIndex);
Serial.println("init1 complete"); //TS COMMENT
});
server.on("/serverIndex", HTTP_GET, []() {
server.sendHeader("Connection", "close");
server.send(200, "text/html", serverIndex);
Serial.println("init2 complete"); //TS COMMENT
});
/*handling uploading firmware file */
server.on("/update", HTTP_POST, []() {
server.sendHeader("Connection", "close");
server.send(200, "text/plain", (Update.hasError()) ? "FAIL" : "OK");
ESP.restart();
Serial.println("init3 complete"); //TS COMMENT
}, []() {
HTTPUpload& upload = server.upload();
if (upload.status == UPLOAD_FILE_START) {
Serial.printf("Update: %s\n", upload.filename.c_str());
Serial.println("init4 complete"); //TS COMMENT
if (!Update.begin(UPDATE_SIZE_UNKNOWN)) { //start with max available size
Serial.println("Check at line 201");
Update.printError(Serial);
}
} else if (upload.status == UPLOAD_FILE_WRITE) {
/* flashing firmware to ESP*/
if (Update.write(upload.buf, upload.currentSize) != upload.currentSize) {
Serial.println("Check at line 207");
Update.printError(Serial);
}
} else if (upload.status == UPLOAD_FILE_END) {
if (Update.end(true)) { //true to set the size to the current progress
Serial.printf("Update Success: %u\nRebooting...\n", upload.totalSize);
} else {
Serial.println("Check at line 214");
Update.printError(Serial);
}
}
});
server.begin();
} //delete if void setup() line is deleted
void loop() { //make sure this line does not appear twice
server.handleClient();
float a0 = analogRead(Aout); // get raw reading from sensor
float v_o = a0 * 4.6 / 1023; // convert reading to volts
float R_S = (4.6-v_o) * 1000 / v_o; // apply formula for getting RS
float R_a = R_S/R_0; // formula for the ratio
float PPM = pow(R_a,-2.95) * 1000; //apply formula for getting PPM
float PPM_ALCOHOL = pow(-13.17*log(R_S/R_0) + 10.35 ,1);
//double PPM = pow(static_cast<double>(R_S/R_0),-2.95) * 1000;
//float PPMnew = a0*0.065156122+0.746160521;
sensor.clearFields();
// Store measured value into point
sensor.addField("VOC_Sensor", a0);
sensor.addField("VOC_PPM", PPM);
//sensor.addField("VOC_RS", R_S);
//sensor.addField("VOC_ALCOHOL", PPM_ALCOHOL);
/****************************** Self inclusions -> Not from InfluxDB ******************************/
Serial.print("Sensor Voltage: ");
Serial.print(v_o); //VOC concentration
Serial.println(" V"); //units
Serial.print("VOC Concentration calculation in arduino: ");
Serial.print(PPM); //VOC concentration
Serial.println(" PPM"); //units
Serial.print("Raw signal: ");
Serial.print(a0); //VOC concentration
Serial.println(" "); //units
delay(1000);
/***************************************************************************************************/
// Print what are we exactly writing
Serial.println(WiFi.localIP());
Serial.println("Line 286");
Serial.println(sensor.toLineProtocol());
// Write point
if (client.writePoint(sensor)) {
Serial.println("InfluxDB write successful");
} else {
Serial.print("InfluxDB write failed: ");
Serial.println(client.getLastErrorMessage());
}
Serial.println("Wait 200ms");
delay(200);
} //delete if void loop() line is deleted
The serial output displays
Connected to ssid
ACCESS UPDATES AT: ESP32_IP_ADDRESS
and then continues to display the "InfluxDB write successful" message with each data point.
I am trying to send some data from a Nodemcu(esp8266) to ESP32. I am trying to use espnow for that purpose, but I am really stuck, I cant merge the Master and Slave for both the boards, I find the codes to be far different I tried some modifications and I can send data from the Nodemcu but can't receive it on the ESP32. I am trying to send two analog values for a Gesture control car.
The master code or the controller code running on the Nodemcu is given below
#include <ESP8266WiFi.h>
#include <espnow.h>
#define MUX_A D4
#define MUX_B D3
#define MUX_C D2
#define ANALOG_INPUT A0
#define CHANNEL 4
extern "C" {
}
uint8_t remoteMac[] = {0x24, 0x6F, 0x28, 0xB6, 0x24, 0x49};
struct __attribute__((packed)) DataStruct {
//char text[32];
int x;
int y;
unsigned long time;
};
DataStruct myData;
unsigned long lastSentMillis;
unsigned long sendIntervalMillis = 1000;
unsigned long sentMicros;
unsigned long ackMicros;
int xAxis;
int yAxis;
int zAxis;
void InitESPNow() {
WiFi.disconnect();
if (esp_now_init()==0) {
Serial.println("ESPNow Init Success");
}
else {
Serial.println("ESPNow Init Failed");
// Retry InitESPNow, add a counte and then restart?
// InitESPNow();
// or Simply Restart
ESP.restart();
}
}
void sendData() {
if (millis() - lastSentMillis >= sendIntervalMillis) {
lastSentMillis += sendIntervalMillis;
myData.time = millis();
uint8_t bs[sizeof(myData)];
memcpy(bs, &myData, sizeof(myData));
sentMicros = micros();
esp_now_send(NULL, bs, sizeof(myData)); // NULL means send to all peers
Serial.println("sent data");
Serial.println(myData.x);
Serial.println(myData.y);
}
}
void sendCallBackFunction(uint8_t* mac, uint8_t sendStatus) {
ackMicros = micros();
Serial.print("Trip micros "); Serial.println(ackMicros - sentMicros);
Serial.printf("Send status = %i", sendStatus);
Serial.println();
Serial.println();
}
void setup() {
Serial.begin(115200); Serial.println();
Serial.println("Starting EspnowController.ino");
WiFi.mode(WIFI_STA); // Station mode for esp-now controller
WiFi.disconnect();
Serial.printf("This mac: %s, ", WiFi.macAddress().c_str());
Serial.printf("slave mac: %02x%02x%02x%02x%02x%02x", remoteMac[0], remoteMac[1], remoteMac[2], remoteMac[3], remoteMac[4], remoteMac[5]);
Serial.printf(", channel: %i\n",CHANNEL);
InitESPNow();
esp_now_set_self_role(ESP_NOW_ROLE_CONTROLLER);
esp_now_add_peer(remoteMac, ESP_NOW_ROLE_SLAVE, CHANNEL, NULL, 0);
esp_now_register_send_cb(sendCallBackFunction);
Serial.print("Message ");
pinMode(MUX_A, OUTPUT);
pinMode(MUX_B, OUTPUT);
pinMode(MUX_C, OUTPUT);
Serial.println("Setup finished");
}
void changeMux(int c, int b, int a) {
digitalWrite(MUX_A, a);
digitalWrite(MUX_B, b);
digitalWrite(MUX_C, c);
}
void loop() {
changeMux(LOW, LOW, LOW);
xAxis = analogRead(ANALOG_INPUT); //Value of the sensor connected to pin 0 of IC
changeMux(LOW, LOW, HIGH);
yAxis = analogRead(ANALOG_INPUT); //Value of the sensor connected to pin 1 of IC
changeMux(LOW, HIGH, LOW);
zAxis = analogRead(ANALOG_INPUT); //Value of the sensor connected to pin 2 of IC
changeMux(LOW, HIGH, LOW);
myData.x= xAxis;
myData.y= yAxis;
sendData();
delay(500);
}
The slave code running on the ESP32 is given below
#include <esp_now.h>
#include <WiFi.h>
#include <esp_wifi.h>
#define CHANNEL 4
uint8_t mac[] = {0x36, 0x33, 0x33, 0x33, 0x33, 0x33};
struct __attribute__((packed)) DataStruct {
//char text[32];
int x;
int y;
unsigned long time;
};
DataStruct myData;
// Init ESP Now with fallback
void setup() {
Serial.begin(115200);
Serial.println("ESPNow/Basic/Slave Example");
//Set device in AP mode to begin with
WiFi.mode(WIFI_AP);
// configure device AP mode
// This is the mac address of the Slave in AP Mode
esp_wifi_set_mac(ESP_IF_WIFI_STA, &mac[0]);
Serial.print("AP MAC: "); Serial.println(WiFi.softAPmacAddress());
// Init ESPNow with a fallback logic
if (esp_now_init()!=0) {
Serial.println("*** ESP_Now init failed");
while(true) {};
}
// Once ESPNow is successfully Init, we will register for recv CB to
// get recv packer info.
esp_now_register_recv_cb(OnDataRecv);
Serial.print("Aheloiioi");
}
// callback when data is recv from Master
void OnDataRecv(const uint8_t *mac_addr, const uint8_t *data, int data_len) {
memcpy(&myData, data, sizeof(myData));
char macStr[18];
snprintf(macStr, sizeof(macStr), "%02x:%02x:%02x:%02x:%02x:%02x",
mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], mac_addr[4], mac_addr[5]);
Serial.print("Last Packet Recv from: "); Serial.println(macStr);
Serial.print("Last Packet Recv Data: "); Serial.println(myData.x); Serial.println(myData.y);
Serial.println("");
}
void loop() {
// Chill
}
This is the only output I get on the ESP32
ESPNow/Basic/Slave Example
AP MAC: 24:6F:28:B6:24:49
Aheloiioi
While this is the output on Nodemcu
Starting EspnowController.ino
This mac: BC:DD:C2:B5:E3:2B, slave mac: 246f28b62449, channel: 4
ESPNow Init Success
Message Setup finished
sent data
10
8
Trip micros 7320
Send status = 1
sent data
9
8
Trip micros 6817
Send status = 1
sent data
10
9
Trip micros 6731
Send status = 1
and it continues
If there are any other methods to send data, please do mention
I never use esp_now before so I didn't test it myself, but I think this has nothing to do with the library or esp32, it is just a minor mistake of c++ usage.
On your sendData() function of your esp8266, you did this:
uint8_t bs[sizeof(myData)];
memcpy(bs, &myData, sizeof(myData));
sentMicros = micros();
esp_now_send(NULL, bs, sizeof(myData));
The bs has a type of uint8_t and is an array, and you try to copy the data that has a type of struct myData into the array. And you then try to pass the array into the esp_now_send(). I quickly took a look at the esp_now_send() function prototype definition, the esp_now_send() need to pass in the address (which has a type of uint8_t) of your data structure myData.
I don't know know why you need to do the memcpy, but I think it will easier and simply to just directly pass in the pointer of myData into the function call.
void sendData() {
if (millis() - lastSentMillis >= sendIntervalMillis) {
lastSentMillis += sendIntervalMillis;
myData.time = millis();
esp_now_send(NULL, (uint8_t *)&myData, sizeof(myData)); // NULL means send to all peers
Serial.println("sent data");
Serial.println(myData.x);
Serial.println(myData.y);
}
}
Please let me know if this work?
I'm trying to make a "home weight" with my ESP32 and display the value using IBMCloud, however I'm running into some issues with the Arduino IDE and my code.
I get this error:
Arduino:1.8.5 (Windows 10), Tarjeta:"ESP32 Dev Module, QIO, 80MHz, 4MB (32Mb), 921600, None"
C:\Users\XX\Documents\Arduino\IBM_Watson_Connect\IBM_Watson_Connect.ino:8:25: fatal error: ESP8266WiFi.h: No such file or directory
compilation terminated.
exit status 1
Compiling error for the ESP32 Dev Module card.
I'm using a ESP32 dev board. My code is this:
#include <ESP8266WiFi.h>
#include <PubSubClient.h> // https://github.com/knolleary/pubsubclient/releases/tag/v2.3
#include "HX711.h" //Load Cell Amplifier
HX711 cell(D2, D4); //Amplifier is connected to these pins on the NodeMCU ESP8266 Board
#define WLAN_SSID "XXXXX"
#define WLAN_PASS "XXXXX"
#define ORG "XXXXX"
#define DEVICE_TYPE "XXXXXX"
#define DEVICE_ID "XXXXX"
#define TOKEN "XXXXXXXX"
char server[] = ORG ".messaging.internetofthings.ibmcloud.com";
char topic[] = "iot-2/evt/status/fmt/json";
char authMethod[] = "use-token-auth";
char token[] = TOKEN;
char clientId[] = "d:" ORG ":" DEVICE_TYPE ":" DEVICE_ID;
WiFiClient wifiClient;
PubSubClient client(server, 1883, NULL, wifiClient);
void setup() {
Serial.begin(115200);
Serial.println();
// Connect to WiFi access point.
Serial.println(); Serial.println();
Serial.print("Connecting to ");
Serial.println(WLAN_SSID);
WiFi.begin(WLAN_SSID, WLAN_PASS);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println();
Serial.println("WiFi connected");
Serial.println("IP address: "); Serial.println(WiFi.localIP());
}
int counter = 0;
void loop() {
if (!!!client.connected()) {
Serial.print("Reconnecting client to ");
Serial.println(server);
while (!!!client.connect(clientId, authMethod, token)) {
Serial.print(".");
delay(500);
}
Serial.println();
}
//----------Get data from load cell and amplifier
long valCalibrated = 0;
long val = 0;
float count = 0;
count = count + 1;
val = 0.5 * val + 0.5 * cell.read();
valCalibrated = (val - 4137240) / 234.20;
//----------Send data to IBM Waton IoT Service
String payload = "{\"d\":{\"weight\":";
payload += valCalibrated;
payload += "}}";
Serial.print("Sending payload: ");
Serial.println(payload);
if (client.publish(topic, (char*) payload.c_str())) {
Serial.println("Publish ok");
} else {
Serial.println("Publish failed");
}
++counter;
delay(100); //adjust delay to send more or less reads per unit time
}
Some places mentioned that the library was missing, that the board wasn't properly selected, the library wasn't updated.. I checked them all.. Arduino is updated, libraries are installed and updated, proper board is selected (I actually have tried all the other Esp32 related boards with the same result)
You're building a program for the ESP32, not the ESP8266. There are a lot of similarities but they're entirely different chips with different software.
So you don't use ESP8266WiFi.h with the ESP32. On the ESP32, the header file is just called WiFi.h (keeping more in line with WiFi support on Arduinos - the ESP32 Arduino Core is intended to be more compatible with the normal Arduino Core than the ESP8266 version was).
You need to
#include <WiFi.h>
instead of ESP8266WiFi.h
You can find the code for these files in the official repository for the Arduino SDK for the ESP32.
(It doesn't help that WiFi.h for the ESP32 identifies itself as ESP8266.h in its own comments...)
I have arduino uno + wifishield and if fails to connect to Bluemix. It gives this error:
"Closed connection from 194.228.11.222. The operation is not authorized."
Any idea why the connection gets kicked out? What operation is not authorized?
Thanks for any idea ;)
======
Here is the code:
#include <SPI.h>
#include <Ethernet.h>
#include <WiFi.h>
#include <WifiIPStack.h>
#include <IPStack.h>
#include <Countdown.h>
#include <MQTTClient.h>
#define MQTT_MAX_PACKET_SIZE 100
#define SIZE 100
#define MQTT_PORT 1883
#define PUBLISH_TOPIC "iot-2/evt/status/fmt/json"
#define SUBSCRIBE_TOPIC "iot-2/cmd/+/fmt/json"
#define USERID "use-token-auth"
#define CLIENT_ID "d:6735ra:hlinoponie:petasek"
#define MS_PROXY "6735ra.messaging.internetofthings.ibmcloud.com"
#define AUTHTOKEN “xxxxx”
byte mac[] = { 0x90, 0xA2, 0xDA, 0x0F, 0xD6, 0x8F };
WiFiClient c;
IPStack ipstack(c);
MQTT::Client<IPStack, Countdown, 100, 1> client = MQTT::Client<IPStack, Countdown, 100, 1>(ipstack);
String deviceEvent;
char ssid[] = “XXXXX”; // your network SSID (name)
char pass[] = “XXXXX”; // your network password
int status = WL_IDLE_STATUS; // the Wifi radio's status
void setup() {
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
// don't continue:
while (true);
}
String fv = WiFi.firmwareVersion();
if ( fv != "1.1.0" )
Serial.println("Please upgrade the firmware");
// attempt to connect to Wifi network:
while ( status != WL_CONNECTED) {
Serial.print("Attempting to connect to WPA SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network:
status = WiFi.begin(ssid, pass);
// wait 5 seconds for connection:
delay(5000);
}
// you're connected now, so print out the data:
Serial.print("Hooray!!! You're connected to the network\n");
}
void loop() {
float tep = mojeDHT.readTemperature();
float vlh = mojeDHT.readHumidity();
int rc = -1;
if (!client.isConnected()) {
Serial.println("Connecting to Watson IoT Foundation ...");
rc = ipstack.connect((char*)MS_PROXY, MQTT_PORT);
MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
data.MQTTVersion = 3;
data.clientID.cstring = (char*)CLIENT_ID;
data.username.cstring = (char*)USERID;
data.password.cstring = (char*)AUTHTOKEN;
data.keepAliveInterval = 60;
rc = -1;
while ((rc = client.connect(data)) != 0) {
Serial.println("rc=");
Serial.println(rc);
delay(2000);
}
Serial.println("Connected successfully\n");
// Serial.println("Temperature(in C)\tDevice Event (JSON)");
Serial.println("____________________________________________________________________________");
}
Serial.println("\n");
MQTT::Message message;
message.qos = MQTT::QOS0;
message.retained = false;
deviceEvent = String("{\"d\":{\"myName\":\"Arduino Uno\",\"temperature\":");
char buffer[60];
// convert double to string
dtostrf(getTemp(),1,2, buffer);
deviceEvent += buffer;
deviceEvent += "}}";
Serial.print("\t");
Serial.print(buffer);
Serial.print("\t\t");
deviceEvent.toCharArray(buffer, 60);
Serial.println(buffer);
message.payload = buffer;
message.payloadlen = strlen(buffer);
rc = client.publish(PUBLISH_TOPIC, message);
if (rc != 0) {
Serial.print("return code from publish was ");
Serial.println(rc);
}
client.yield(5000);
}
/*
This function is reproduced as is from Arduino site => http://playground.arduino.cc/Main/InternalTemperatureSensor
*/
double getTemp(void) {
unsigned int wADC;
double t;
ADMUX = (_BV(REFS1) | _BV(REFS0) | _BV(MUX3));
ADCSRA |= _BV(ADEN); // enable the ADC
delay(20); // wait for voltages to become stable.
ADCSRA |= _BV(ADSC); // Start the ADC
// Detect end-of-conversion
while (bit_is_set(ADCSRA,ADSC));
// Reading register "ADCW" takes care of how to read ADCL and ADCH.
wADC = ADCW;
// The offset of 324.31 could be wrong. It is just an indication.
t = (wADC - 324.31 ) / 1.22;
// The returned temperature is in degrees Celcius.
return (t);
}
It might be the case your organizations is configured to block non-secure connections (since you are using port 1883). Check the step 5 on this recipe
https://developer.ibm.com/recipes/tutorials/connect-an-arduino-uno-device-to-the-ibm-internet-of-things-foundation/
I noticed this error in the log: The topic is not valid: Topic="lwt" ClientID="d:6735ra:hlinoponie:petasek" Reason="The topic does not match an allowed rule".
I didn't see that topic listed in your code, but you may want to check to see how that may be getting set as topic.
I am working on an Arduino project which is required an authorized authentication based on OAuth 1.0 to connects to the cloud. This is alike [Authorizing a request to Twitter API][1], and I am stuck in the step of [Creating a signature][2]. The whole process of creating a signature requires algorithms like encodeURL, base64encode, and hmac-sha1. On my Arduino project, I use Cryptosuite(link 3) library for hmac-sha1 and arduino-base64(link 4) library for base64encode. Both of them are working fine separately. However, I need to get a base64-formatted output of hmac-sha1. So I have tried this:
#include <avr/pgmspace.h>
#include <sha1.h>
#include <Base64.h>
uint8_t *in, out, i;
char b64[29];
static const char PROGMEM b64chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
char key[] = "testKey";
char basestring[] = "testing";
void printHash(uint8_t* hash) {
int i;
for (i=0; i<20; i++) {
Serial.print("0123456789abcdef"[hash[i]>>4]);
Serial.print("0123456789abcdef"[hash[i]&0xf]);
}
Serial.println();
}
void setup() {
Serial.begin(115200);
Serial.print("Result:");
Sha1.initHmac((uint8_t*)key, strlen(key));
Sha1.print(basestring);
printHash(Sha1.resultHmac());
Serial.println();
// encoding
char* input;
input = (char*)(Sha1.resultHmac());
int inputLen = strlen(input);
int encodedLen = base64_enc_len(inputLen);
char encoded[encodedLen];
// note input is consumed in this step: it will be empty afterwards
base64_encode(encoded, input, inputLen);
Serial.print("base64 result: ");
Serial.println(encoded);
}
void loop() {
}
The output of printHash that I got is 60d41271d43b875b791e2d54c34bf3f018a29763, which is exactly same with the online verification tool(link 5).
However, I supposed to get YNQScdQ7h1t5Hi1Uw0vz8Biil2M= for the base64 result. But I got L18B0HicKRhuxmB6SIFpZP+DpHxU which seems wrong. I have also tried to write a JAVA program and a python program, which also said that the output of the base64 result should be YNQScdQ7h1t5Hi1Uw0vz8Biil2M=
I also found this post: Issues talking between Arduino SHA1-HMAC and base64 encoding and Python(link 6). I have also tried the tidy function it mentioned from Adafruit-Tweet-Receipt(link 7).
// base64-encode SHA-1 hash output. This is NOT a general-purpose base64
// encoder! It's stripped down for the fixed-length hash -- always 20
// bytes input, always 27 chars output + '='.
for(in = Sha1.resultHmac(), out=0; ; in += 3) { // octets to sextets
b64[out++] = in[0] >> 2;
b64[out++] = ((in[0] & 0x03) << 4) | (in[1] >> 4);
if(out >= 26) break;
b64[out++] = ((in[1] & 0x0f) << 2) | (in[2] >> 6);
b64[out++] = in[2] & 0x3f;
}
b64[out] = (in[1] & 0x0f) << 2;
// Remap sextets to base64 ASCII chars
for(i=0; i<=out; i++) b64[i] = pgm_read_byte(&b64chars[b64[i]]);
b64[i++] = '=';
b64[i++] = 0;
Is there any mistake I've made in here?
Thanks!
So full example will be:
#include <avr/pgmspace.h>
#include <sha1.h>
#include <Base64.h>
char key[] = "testKey";
char basestring[] = "testing";
void printHash(uint8_t* hash) {
for (int i=0; i<20; i++) {
Serial.print("0123456789abcdef"[hash[i]>>4]);
Serial.print("0123456789abcdef"[hash[i]&0xf]);
}
Serial.println();
}
void setup() {
Serial.begin(115200);
Serial.print("Input: ");
Serial.println(basestring);
Serial.print("Key: ");
Serial.println(key);
Serial.print("Hmac-sha1 (hex): ");
Sha1.initHmac((uint8_t*)key, strlen(key));
Sha1.print(basestring);
uint8_t *hash;
hash = Sha1.resultHmac();
printHash(hash);
// base64 encoding
char* input = (char*) hash;
int inputLen = strlen(input) - 1; // skip null termination
int encodedLen = base64_enc_len(inputLen);
char encoded[encodedLen];
// note input is consumed in this step: it will be empty afterwards
base64_encode(encoded, input, inputLen);
Serial.print("Hmac-sha1 (base64): ");
Serial.println(encoded);
}
void loop() { }
which outputs:
Input: testing
Key: testKey
Hmac-sha1 (hex): 60d41271d43b875b791e2d54c34bf3f018a29763
Hmac-sha1 (base64): YNQScdQ7h1t5Hi1Uw0vz8Biil2M=