Arduino built in example "WriteMultipleFields" gets error code -301
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I am using an Arduino Uno R3 board and Ethernet shield. I replaced the Channel ID and the write API key with my own in the secrets.h file.
It connects with DHCP ok.
Arduino IDE 1.8.12
But comes back with error code -301. Serial Monitor:
Initialize Ethernet with DHCP:
DHCP assigned IP 10.10.1.170
Problem updating channel. HTTP error code -301
What am I missing?
/*
WriteMultipleFields
Description: Writes values to fields 1,2,3 and 4 in a single ThingSpeak update every 20 seconds.
Hardware: Arduino Ethernet
!!! IMPORTANT - Modify the secrets.h file for this project with your network connection and ThingSpeak channel details. !!!
Note:
- Requires the Ethernet library
ThingSpeak ( https://www.thingspeak.com ) is an analytic IoT platform service that allows you to aggregate, visualize, and
analyze live data streams in the cloud. Visit https://www.thingspeak.com to sign up for a free account and create a channel.
Documentation for the ThingSpeak Communication Library for Arduino is in the README.md folder where the library was installed.
See https://www.mathworks.com/help/thingspeak/index.html for the full ThingSpeak documentation.
For licensing information, see the accompanying license file.
Copyright 2018, The MathWorks, Inc.
*/
#include "ThingSpeak.h"
#include <Ethernet.h>
#include "secrets.h"
byte mac[] = SECRET_MAC;
// Set the static IP address to use if the DHCP fails to assign
IPAddress ip(10, 10, 1, 76);
IPAddress myDns(10, 10, 1, 1);
EthernetClient client;
unsigned long myChannelNumber = SECRET_CH_ID;
const char * myWriteAPIKey = SECRET_WRITE_APIKEY;
// Initialize our values
int number1 = 0;
int number2 = random(0,100);
int number3 = random(0,100);
int number4 = random(0,100);
void setup() {
Ethernet.init(10); // Most Arduino Ethernet hardware
Serial.begin(115200); //Initialize serial
// start the Ethernet connection:
Serial.println("Initialize Ethernet with DHCP:");
if (Ethernet.begin(mac) == 0) {
Serial.println("Failed to configure Ethernet using DHCP");
// Check for Ethernet hardware present
if (Ethernet.hardwareStatus() == EthernetNoHardware) {
Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :(");
while (true) {
delay(1); // do nothing, no point running without Ethernet hardware
}
}
if (Ethernet.linkStatus() == LinkOFF) {
Serial.println("Ethernet cable is not connected.");
}
// try to congifure using IP address instead of DHCP:
Ethernet.begin(mac, ip, myDns);
} else {
Serial.print(" DHCP assigned IP ");
Serial.println(Ethernet.localIP());
}
// give the Ethernet shield a second to initialize:
delay(1000);
ThingSpeak.begin(client); // Initialize ThingSpeak
}
void loop() {
// set the fields with the values
ThingSpeak.setField(1, number1);
ThingSpeak.setField(2, number2);
ThingSpeak.setField(3, number3);
ThingSpeak.setField(4, number4);
// write to the ThingSpeak channel
int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
if(x == 200){
Serial.println("Channel update successful.");
}
else{
Serial.println("Problem updating channel. HTTP error code " + String(x));
}
// change the values
number1++;
if(number1 > 99){
number1 = 0;
}
number2 = random(0,100);
number3 = random(0,100);
number4 = random(0,100);
delay(20000); // Wait 20 seconds to update the channel again
7 个评论
Gerardo Spinelli
2020-11-5
I have the same problem with an Arduino MKR 1000. But in my case he issue is intermittent.
回答(2 个)
tebraxin tebraxin
2021-9-7
hello to everybody
i'm also using Arduino Uno with ethernet shield, and I still have error 301 with the example code (write multiple field)
I already read a lot of forum, questions etc.. all around internet but I still have the problem.
My network work cooretly with all my divecies,
I tried to change internal IP address, DNS IP address, cables, example codes form library Tingspeak... without solving the problem
thanks
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