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Topic: How to interface MPU9250 and Node mcu (Read 134 times) previous topic - next topic

sul97

I am trying to send mpu sensor data to Pubnub IOT platform but not able to do it since there is some unknown problem. There is no error in code but follow issue pops up in com port:-

COM PORT Results

It looks like sensor reading is in json format which needs to be converted using ArduinoJSON Library but not sure so decided to consult you guys.

Here is the code:-

Code: [Select]
#include <ESP8266WiFi.h>
#define PubNub_BASE_CLIENT WiFiClient
#include <PubNub.h>
#define PUBNUB_DEFINE_STRSPN_AND_STRNCASECMP
#include "MPU9250.h"

const char *ssid =  "mym404";     // replace with your wifi ssid and wpa2 key
const char *pass =  "786110786";

const char * pubkey = "pub-c-4a9cdbca-5688-4939-a852-f63cf6743980";
const char * subkey = "sub-c-9b4067ae-1293-11e9-b4a6-026d6924b094";

const char * pubchannel = "demo_keyset";
const char * subchannel = "demo_keyset";

MPU9250 IMU(Wire,0x68);
int status;


void setup() {
    /* For debugging, set to speed of your choice */
    Serial.begin(115200);
   

       Serial.println("Connecting to ");
       Serial.println(ssid);
 
       WiFi.begin(ssid, pass);
       while (WiFi.status() != WL_CONNECTED)
          {
            delay(500);
            Serial.print(".");
          }
      Serial.println("");
      Serial.println("WiFi connected");

    /* Start the Pubnub library by giving it a publish and subscribe
       keys */
    PubNub.begin(pubkey, subkey);

    while(!Serial) {}

  // start communication with IMU
  status = IMU.begin();
  if (status < 0) {
    Serial.println("IMU initialization unsuccessful");
    Serial.println("Check IMU wiring or try cycling power");
    Serial.print("Status: ");
    Serial.println(status);
    while(1) {}
  }
}

void loop() {
    // read the sensor
  IMU.readSensor();
  // display the data
  Serial.print(IMU.getAccelX_mss(),6);
  Serial.print("\t");


    /* Publish message. You could use `auto` here... */
    PubNonSubClient *pclient = PubNub.publish(pubchannel, "String(IMU.getAccelX_mss())");
    if (!pclient) return;
    PublishCracker cheez;
    cheez.read_and_parse(pclient);
    /** You're mostly interested in `outcome()`, and,
        if it's "failed", then `description()`.
    */
    Serial.print("Outcome: "); Serial.print(cheez.outcome());
    Serial.print(' '); Serial.println(cheez.to_str(cheez.outcome()));
    Serial.print("description: "); Serial.println(cheez.description());
    Serial.print("timestamp: "); Serial.println(cheez.timestamp());
    Serial.print("state: "); Serial.print(cheez.state());
    Serial.print(' '); Serial.println(cheez.to_str(cheez.state()));
    pclient->stop();

    /* Wait for news. */
    PubSubClient *sclient = PubNub.subscribe(subchannel);
    if (!sclient) return; // error
    String msg;
    SubscribeCracker ritz(sclient);
    while (!ritz.finished()) {
        ritz.get(msg);
        if (msg.length() > 0) {
            Serial.print("Received: "); Serial.println(msg);
        }
    }
    sclient->stop();

    delay(1000);
}


What do you guys think?

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