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MATLAB Central Team
Hi there,
I am attempting to obtain a location history (thus the location of each of the previous messages recived) and the current location of my device on Thingspeak. I have not found any examples of how to do this on Thingspeak. Please may someone guide me or advise me on how to do this.
Thank you
When making a ThingHttp request via POST, the server response header does not include: "Content-Length:". Instead it is using "Transfer-Encoding: chunked". This makes it dificult to confirm that the entire response has been recieved. Any way to change this?
21:09:55.812 -> POST /apps/thinghttp/send_request HTTP/1.1
21:09:55.812 -> Host: api.thingspeak.com
21:09:55.812 -> Content-Type: application/x-www-form-urlencoded
21:09:55.812 -> Content-Length: 60
21:09:55.812 ->
21:09:55.812 -> headers=false&api_key=[removed]&message=Arduino Reset
21:09:55.906 ->
21:09:57.040 ->
21:09:57.040 ->
21:09:57.040 -> HTTP/1.1 200 OK
21:09:57.040 -> Date: Thu, 15 Dec 2022 02:09:57 GMT
21:09:57.040 -> Content-Type: text/html; charset=utf-8
21:09:57.040 -> Transfer-Encoding: chunked
21:09:57.040 -> Connection: keep-alive
21:09:57.040 -> Status: 200 OK
21:09:57.040 -> Cache-Control: max-age=0, private, must-revalidate
21:09:57.040 -> X-Request-Id: 798bbb62-da97-4ff8-a15b-c60b68fd60d3
21:09:57.040 -> ETag: W/"408e73c03e9c23fc2318c396c21c09e8"
21:09:57.040 ->
21:09:57.040 -> 2d
21:09:57.040 -> Congratulations! You've fired the alert event
21:09:57.040 -> 0
21:09:57.040 ->
I am trying to send data to a channel using thingspeak writefield and I keep getting an error no matching function... On reading the documents I am having a problem with "Write key". I can find no info on write key. what is it?
Hi there, I have been attempting to try and access the loaction of my device using the following code:
myChannel=*******;
ReadAPIKey='xxxxxxxxxxxx';
myData=thingSpeakRead(myChannel,'ReadKey', ReadAPIKey,'numpoints',100,'outputformat','timetable','location',1);
myVector=(myData.Latitude).^2+(myData.Longitude).^2+myData.Altitude.^2;
maxVector=max(myData.Latitude)^2+max(myData.Longitude)^2+max(myData.Altitude)^2;
myVector=myVector/maxVector;
myMap=geoscatter(myData.lat,myData.long,15,myVector,'filled');
geobasemap('satellite');
colormap jet;
I have about 100 entry points at this stage. However, i get the following error:
Error using .
Unrecognized table variable name 'lat'.
Error in Custom (no starter code) 2 (line 7)
myMap=geoscatter(myData.lat,myData.long,15,myVector,'filled');
I am attempting to access the location of a moving device. Meaning, the longitude and latitude values will be constantly changing, thus, I do not want to set my latitude or longitude value as a constant but i want it to keep on updating as my device moves around. How would I do this? How would I ammend this error without setting the "lat" or "long" as a consant before hand?
Further, my device should be constantly sending messages, this, the number of entries to which it will see the location of will be contantly changing. How can I thus not set the entry points as a specific value but rather have it update as my device sends messags?
Is there an easier or better way to do this?
Thanks
Hello, I have a some problem with my OneWire communication and ThingSpeak (ESP8266). Quiet often I have got -127 value, but everything with connections should be OK. I have a free license a TS and two channels in my account. I think that this piece of code may be problem:
void loop()
{
readKWHMeterPC();
readKWHMeterHeat();
read3WayValve();
digitalWrite(POWER_LED, LOW);
if ((millis() - lastTimeLoop) >= DELAY_TIME_LOOP){
readTemperatures();
calcenergyPC();
calcenergyHeat();
avgpowerPC(); // nie liczy w pierwszym przebiegu pracy dokładnie i w ostatnim, bo niekoniecznie jest załączenie/wył. równą minutę przed wysłaniem na TS -> w efekcie liczy moc z mniejszej ilości impulsów niż normalnie w ciągu minuty jest przy stałym obciążeniu
avgpowerHeat();
write2TSDataCH1( CH1channelID , CH1dataFieldOne , valveState , CH1dataFieldTwo , meterPulsesPC, CH1dataFieldThree, energyPC, CH1dataFieldFour, meterPulsesHeat , CH1dataFieldFive ,energyHeat, CH1dataFieldSix , powerPC, CH1dataFieldSeven, powerHeat );
write2TSDataCH2( CH2channelID , CH2dataFieldOne , tempC1 , CH2dataFieldTwo , tempC2, CH2dataFieldThree, tempC3 );
lastTimeLoop = millis();
}
Can I send data to TS to 2 channels in the same time or not?
Hi, I want to collect the simulation data by using NASA HL-20 model, then the data will transmit to ThingSpeak. However, I don't have the block for ThingSpeak Channel at the Simulink Library Browser. Is it because the block has its own version of simulink (meaning I have to update my version) or is there any else that I don't know? Besides, can you suggest which methods are suitable for me to successfully transfer the simulation data to ThingSpeak?
We have to create a few 10s of channels all with the same public view and settings. Is there any way of automating this ?
Doing it manually is time consuming and results in omissions and small mistakes.
Hi there, I am trying to reach out to anyone who has successfully completed the project of building a weather station using an Arduino MKRFOX1200 board, a dht11 sensor across the Sigfox and Thingspeak networks. I’ve been attempting to build the weather station over the SigFox and things.io network for over a year now but I was unsuccessful. I then found this tutorial on how to build this using Thingspeak: https://create.arduino.cc/projecthub/masteruan/arduino-mkr-fox-1200-sigfox-meteo-station-423609 . I have now been attempting to build it using this network but am still unsuccessful.
My SigFox and arduino is working. I made the arduino code convert temperature to Celsius (rather than Kelvin which is what the tutorial does). However, I am unable to access the location of the device on Thingspeak (my SigFox atlas is activated) and I am getting humidity values of approximately -30k. Please may someone assist me or give me a detailed approach on how to fix these issues. My goal is to have my thingspeak like this: https://thingspeak.com/channels/227248. I have followed the tutorial and projecthub but I cannot figure out why I am obtaining a confusing humidity reading. Please please may someone help.
Thank you so much for your time.
hello, how i can show module image in to public view.
in widget public dont show the option.
exist any code for MATLAB?
hello, i buy a license for upload images to channel and ESP32CAM, after compile and upload the example code, then reset the esp32.
the serial monitor only show
Brownout detector was triggered
ets Jun 8 2016 00:22:57
rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1216
ho 0 tail 12 room 4
load:0x40078000,len:10944
load:0x40080400,len:6388
entry 0x400806b4
i have another code working for esp32cam and send image to telegram... maybe any can show why works there and not here please.
here the config
Hello, I need help with this code to show the longitude and latitude from the neo6m module. When the map is displayed, it looks very close. How can I fix it?
It is for a university project I hope you can help me thanks
code:
lat = thingSpeakRead(1962341,'Fields',3,'ReadKey','ZHIVMUHTJXI4xxxx','NumPoints',10,'Timeout',50);
lon = thingSpeakRead(1962341,'Fields',4,'ReadKey','ZHIVMUHTJXI4xxxx','NumPoints',10,'Timeout',50);
geoscatter(lat,lon,'h');
geobasemap('satellite');
Hello!
The fields sometimes will update most of the times but not always. The Serial monitor shows the following output when it does not update:
while when it update it shows the following:
There is no issue with the update rate since it is more than 15 seconds.
Iam using a feather fona and the chunk of the code Iam using to send the data is the following:
if (gprsSerial.available())
Serial.write(gprsSerial.read());
gprsSerial.println("AT");
delay(1000);
gprsSerial.println("AT+CPIN?");
delay(1000);
gprsSerial.println("AT+CREG?");
delay(1000);
gprsSerial.println("AT+CGATT?");
delay(1000);
gprsSerial.println("AT+CIPSHUT");
delay(1000);
gprsSerial.println("AT+CIPSTATUS");
delay(2000);
gprsSerial.println("AT+CIPMUX=0");
delay(2000);
ShowSerialData();
gprsSerial.println("AT+CSTT=\"internet\"");//start task and setting the APN,
delay(1000);
ShowSerialData();
gprsSerial.println("AT+CIICR");//bring up wireless connection
delay(3000);
ShowSerialData();
gprsSerial.println("AT+CIFSR");//get local IP adress
delay(2000);
ShowSerialData();
gprsSerial.println("AT+CIPSPRT=0");
delay(3000);
ShowSerialData();
gprsSerial.println("AT+CIPSTART=\"TCP\",\"api.thingspeak.com\",\"80\"");//start up the connection
delay(6000);
ShowSerialData();
gprsSerial.println("AT+CIPSEND");//begin send data to remote server
delay(8000);
ShowSerialData();
delay(4000);
gprsSerial.println(str3);//begin send data to remote server
delay(8000);
ShowSerialData();
delay(6000);
gprsSerial.println((char)26);//sending
delay(6000);//waitting for reply, important! the time is base on the condition of internet
gprsSerial.println();
ShowSerialData();
gprsSerial.println("AT+CIPSHUT");//close the connection
delay(3000);
ShowSerialData();
delay(3000);
}
Thank you in advance!
Using a Thingspeak42 node with NodeRed on a RaspberryPi 4. The node is showing data is being sent but nothing gets populated on graph in Thingspeak.
I would like to have a widget to control a pump connected to Thingspeak via Talkback. I have also established a connection with thingspeak where I publish my sensor data to the channel and can visualize the data through the various widgets. But I cant find a widget or method to control the pump from a graphical perspective on the channel (like a switch or button interface where clicking them would turn the pump on or off). Thingsboard seems to have the feature, not sure of thingspeak. If anyone knows a way please do comment out. Have a great day!
lorawan, MQTT,
Hi,
I use micro:bit and iot:bit to collect data about temperature and humidity (via BME 280, but I cant connect with ThingSpeak, but Iam connected on wifi.
What I make wrong?
Hi all
Learning home automation and found your webpage via cookbook sample code, which I cannot get work, i.e. sending a tweet. Somehow API keys should be OK as I got another sample from your page (bulkdata upload with Raspi) working just fine
Code seem to run and response is OK 200, am I just missing how to check this from twitter or? if I change API key to xxx response is 400 so
import time, os
import requests
MAX_TEMP = 19.0
MIN_T_BETWEEN_WARNINGS = 1 # Minutes
BASE_URL = 'https://api.thingspeak.com/apps/thingtweet/1/statuses/update/'
KEY = 'xxx'
def send_notification(temp):
status = 'Thingtweet: Room getting hot. room temp=' + str(temp)
data = {'api_key' : KEY, 'status' : status}
response = requests.post(BASE_URL, json=data)
print(response)
print(data)
def room_temp():
f = open('/mnt/1wire/28.55CA95F0013C/temperature','r')
room_temp = f.read()
return float(room_temp)
while True:
temp = room_temp()
print("room Temp (C): " + str(temp))
if temp > MAX_TEMP:
print("room TOO HOT!")
send_notification(temp)
print("No more notifications for: " + str(MIN_T_BETWEEN_WARNINGS) + " mins")
time.sleep(MIN_T_BETWEEN_WARNINGS * 1)
time.sleep(10)
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7627 votos
i have imported data from a chanel, edited it and re uploaded again,
it returns error message when i upload it.
it says "The uploaded file was not imported because it is empty"
Mathworks returns also a message to my email saying "Timestamp already in channel."
