JohannaB:
I have posted regarding the MKR board before but it seems to never stop giving me toubles.
I am trying to run PubSubClient to connect to an MQTT broker with my Arduino MKR NB 1500. When connected to the computer via USB it works completely fine, but as soon as I power it through the battery socket it gets stuck in the "connecting to mqtt-broker" state.
Has anyone else had issues with this? I have tried different voltages on the battery(which is in fact a simulated battery) with no luck. I have also measured so that it stays above the 3.7V limit at all times.
I would be very thankful for any help.
Hi,
same or similar happening here, the following sketch (UDP Ntp example) slightly modified, just added some led on/off lines for debugging, works fine when powered from USB but reboots continuously when powered from Vin (5V/2A)
/*
Udp NTP Client
Get the time from a Network Time Protocol (NTP) time server
Demonstrates use of UDP sendPacket and ReceivePacket
For more on NTP time servers and the messages needed to communicate with them,
see http://en.wikipedia.org/wiki/Network_Time_Protocol
created 4 Sep 2010
by Michael Margolis
modified 9 Apr 2012
by Tom Igoe
modified 6 Dec 2017 ported from WiFi101 to MKRGSM
by Arturo Guadalupi
This code is in the public domain.
*/
#include <MKRNB.h>
#include "arduino_secrets.h"
// Please enter your sensitive data in the Secret tab or arduino_secrets.h
// PIN Number
const char PINNUMBER[] = SECRET_PINNUMBER;
unsigned int localPort = 2390; // local port to listen for UDP packets
IPAddress timeServer(129, 6, 15, 28); // time.nist.gov NTP server
const int NTP_PACKET_SIZE = 48; // NTP time stamp is in the first 48 bytes of the message
byte packetBuffer[ NTP_PACKET_SIZE]; //buffer to hold incoming and outgoing packets
// initialize the library instance
NBClient client;
GPRS gprs;
NB nbAccess;
// A UDP instance to let us send and receive packets over UDP
NBUDP Udp;
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(9600);
// initialize digital pin LED_BUILTIN as an output.
pinMode(6, OUTPUT);
digitalWrite(6, HIGH); // turn the LED on (HIGH is the voltage level)
int count;
for(count=0;count<50;count++)
{
if(!Serial)
{
delay(100);
if(count%2)
digitalWrite(6, LOW); // turn the LED off by making the voltage LOW
else
digitalWrite(6, HIGH); // turn the LED off by making the voltage LOW
}
else
break;
}
digitalWrite(6, LOW);
Serial.println("Starting Arduino GPRS NTP client.");
// connection state
boolean connected = false;
// After starting the modem with NB.begin()
// attach the shield to the GPRS network with the APN, login and password
while (!connected) {
if ((nbAccess.begin(PINNUMBER) == NB_READY) &&
(gprs.attachGPRS() == GPRS_READY)) {
connected = true;
} else {
Serial.println("Not connected");
delay(1000);
}
}
Serial.println("\nStarting connection to server...");
Udp.begin(localPort);
}
void loop()
{
digitalWrite(6, !digitalRead(6));
sendNTPpacket(timeServer); // send an NTP packet to a time server
// wait to see if a reply is available
delay(1000);
if ( Udp.parsePacket() ) {
Serial.println("packet received");
// We've received a packet, read the data from it
Udp.read(packetBuffer, NTP_PACKET_SIZE); // read the packet into the buffer
//the timestamp starts at byte 40 of the received packet and is four bytes,
// or two words, long. First, esxtract the two words:
unsigned long highWord = word(packetBuffer[40], packetBuffer[41]);
unsigned long lowWord = word(packetBuffer[42], packetBuffer[43]);
// combine the four bytes (two words) into a long integer
// this is NTP time (seconds since Jan 1 1900):
unsigned long secsSince1900 = highWord << 16 | lowWord;
Serial.print("Seconds since Jan 1 1900 = " );
Serial.println(secsSince1900);
// now convert NTP time into everyday time:
Serial.print("Unix time = ");
// Unix time starts on Jan 1 1970. In seconds, that's 2208988800:
const unsigned long seventyYears = 2208988800UL;
// subtract seventy years:
unsigned long epoch = secsSince1900 - seventyYears;
// print Unix time:
Serial.println(epoch);
// print the hour, minute and second:
Serial.print("The UTC time is "); // UTC is the time at Greenwich Meridian (GMT)
Serial.print((epoch % 86400L) / 3600); // print the hour (86400 equals secs per day)
Serial.print(':');
if ( ((epoch % 3600) / 60) < 10 ) {
// In the first 10 minutes of each hour, we'll want a leading '0'
Serial.print('0');
}
Serial.print((epoch % 3600) / 60); // print the minute (3600 equals secs per minute)
Serial.print(':');
if ( (epoch % 60) < 10 ) {
// In the first 10 seconds of each minute, we'll want a leading '0'
Serial.print('0');
}
Serial.println(epoch % 60); // print the second
}
// wait ten seconds before asking for the time again
delay(10000);
}
// send an NTP request to the time server at the given address
unsigned long sendNTPpacket(IPAddress& address)
{
//Serial.println("1");
// set all bytes in the buffer to 0
memset(packetBuffer, 0, NTP_PACKET_SIZE);
// Initialize values needed to form NTP request
// (see URL above for details on the packets)
//Serial.println("2");
packetBuffer[0] = 0b11100011; // LI, Version, Mode
packetBuffer[1] = 0; // Stratum, or type of clock
packetBuffer[2] = 6; // Polling Interval
packetBuffer[3] = 0xEC; // Peer Clock Precision
// 8 bytes of zero for Root Delay & Root Dispersion
packetBuffer[12] = 49;
packetBuffer[13] = 0x4E;
packetBuffer[14] = 49;
packetBuffer[15] = 52;
//Serial.println("3");
// all NTP fields have been given values, now
// you can send a packet requesting a timestamp:
Udp.beginPacket(address, 123); //NTP requests are to port 123
//Serial.println("4");
Udp.write(packetBuffer, NTP_PACKET_SIZE);
//Serial.println("5");
Udp.endPacket();
//Serial.println("6");
}
did u have any progress with that?
Best regards
Jordi