Unable to Post Data on Channel

Also, my recommendation is to reset the API key to your channel and update your post above to remove your API key, unless you want spurious data in your channel.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Julien Jacquemet 2020-1-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/500306-unable-to-post-data-on-channel#answer_410239

Thanks. It's work now for all my channel.

Have change some configurations in my account ?

Best Regards

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 3

Andrzej Bieniek 2020-1-25

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/500306-unable-to-post-data-on-channel#answer_412000

编辑：Vinod 2020-1-27

Hi,

I have the same problem with my channel, I always get 0, could you help?

curl "https://api.thingspeak.com/update?api_key=MY_API_KEY&field1=1&field2=2"

0

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Vinod 2020-1-27

编辑：Vinod 2020-1-27

Still having trouble?

请先登录，再进行评论。

Answer 4

Andrew St Clair 2020-2-2

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/500306-unable-to-post-data-on-channel#answer_413300

编辑：Andrew St Clair 2020-2-2

I am also having this issue. no matter what i do, i always get 0

EDIT:

the code responsible for uploading the data looks like this (Arduino Code):

HttpClient client;
humidity = DHT.getHumidity();
temp = DHT.getTemperature();
client.get("https://api.thingspeak.com/update?api_key=XXX&field1="+String((int)temp)+"&field2="+String((int)humidity)+"&field3="+String(dewPoint((int)temp, (int)humidity)));

6 个评论
显示 4更早的评论隐藏 4更早的评论

pavel heimlich 2020-2-20

Hi,

I've got the same problem, could you reset my account? thanks!

Vinod 2020-2-20

@Pavel: Try again. You may have to log out of ThingSpeak and log back in.

请先登录，再进行评论。

Answer 5

peter veres 2020-2-9

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/500306-unable-to-post-data-on-channel#answer_414635

Hi everybody

I created 3 channels, humidity - temperature - altitude. (channel ID 979451)

Using Raspbery Pi4 + BMP180 sensor I see that data for 3 fields are uploading but not showing on chart at all:

https://api.thingspeak.com/update?api_key=XXXXXXXXXXX&field1=19&field2=26&field3=178

Is refreshing every 5 seconds, reading correct data, but not showing on channel. Even I tryed to change API key, without success.

Does somebody has any ideea why?

Thank you

9 个评论
显示 7更早的评论隐藏 7更早的评论

peter veres 2020-2-12

Hi

Here is the main program:

******************************************************************************************************

import sys

import RPi.GPIO as GPIO

import os

import Adafruit_DHT

import urllib.request

import smbus

import time

from ctypes import c_short

from Adafruit_BMP085 import BMP085

DHTpin = 22

key="XXXXXXXXXXXXXXXXXXXXXXXX" # Enter your Write API key from ThingSpeak

GPIO.setmode(GPIO.BCM)

GPIO.setwarnings(False)

GPIO.setmode(GPIO.BCM)

def readDHT():

humi, temp = Adafruit_DHT.read_retry(Adafruit_DHT.DHT11, DHTpin)

return (str(int(humi)), str(int(temp)))

# ===========================================================================

# Example Code

# ===========================================================================

# Initialise the BMP085 and use STANDARD mode (default value)

bmp = BMP085(0x77, debug=True)

#bmp = BMP085(0x77)

# To specify a different operating mode, uncomment one of the following:

# bmp = BMP085(0x77, 0) # ULTRALOWPOWER Mode

# bmp = BMP085(0x77, 1) # STANDARD Mode

# bmp = BMP085(0x77, 2) # HIRES Mode

# bmp = BMP085(0x77, 3) # ULTRAHIRES Mode

temp = bmp.readTemperature()

# Read the current barometric pressure level

pressure = bmp.readPressure()

# To calculate altitude based on an estimated mean sea level pressure

# (1013.25 hPa) call the function as follows, but this won't be very accurate

altitude = bmp.readAltitude()

# To specify a more accurate altitude, enter the correct mean sea level

# pressure level. For example, if the current pressure level is 1023.50 hPa

# enter 102350 since we include two decimal places in the integer value

# altitude = bmp.readAltitude(102350)

print ("Temp: %.2f C" % temp)

print ("Pressure: %.2f hPa" % (pressure / 100.0))

print ("Altitude: %.2f" % altitude)

def main():

print ('System Ready...')

URL = 'https://api.thingspeak.com/update?api_key=%s' % key

print ("Wait....")

while True:

(humi, temp)= readDHT()

(pressure) = pressure#readBmp180()

finalURL = URL +"&field1=%s&field2=%s"%(humi, temp)+"&field3=%.3s" %(altitude)

print (finalURL)

s=urllib.request.Request(finalURL);

if __name__=="__main__":

*************************************************************************************************************

This is calling another program:BMP085, this is calculating the values:

***************************************************************************************************************

import time

from Adafruit_I2C import Adafruit_I2C

# ===========================================================================

# BMP085 Class

# ===========================================================================

class BMP085 :

i2c = None

# Operating Modes

__BMP085_ULTRALOWPOWER = 0

__BMP085_STANDARD = 1

__BMP085_HIGHRES = 2

__BMP085_ULTRAHIGHRES = 3

# BMP085 Registers

__BMP085_CAL_AC1 = 0xAA # R Calibration data (16 bits)

__BMP085_CAL_AC2 = 0xAC # R Calibration data (16 bits)

__BMP085_CAL_AC3 = 0xAE # R Calibration data (16 bits)

__BMP085_CAL_AC4 = 0xB0 # R Calibration data (16 bits)

__BMP085_CAL_AC5 = 0xB2 # R Calibration data (16 bits)

__BMP085_CAL_AC6 = 0xB4 # R Calibration data (16 bits)

__BMP085_CAL_B1 = 0xB6 # R Calibration data (16 bits)

__BMP085_CAL_B2 = 0xB8 # R Calibration data (16 bits)

__BMP085_CAL_MB = 0xBA # R Calibration data (16 bits)

__BMP085_CAL_MC = 0xBC # R Calibration data (16 bits)

__BMP085_CAL_MD = 0xBE # R Calibration data (16 bits)

__BMP085_CONTROL = 0xF4

__BMP085_TEMPDATA = 0xF6

__BMP085_PRESSUREDATA = 0xF6

__BMP085_READTEMPCMD = 0x2E

__BMP085_READPRESSURECMD = 0x34

# Private Fields

_cal_AC1 = 0

_cal_AC2 = 0

_cal_AC3 = 0

_cal_AC4 = 0

_cal_AC5 = 0

_cal_AC6 = 0

_cal_B1 = 0

_cal_B2 = 0

_cal_MB = 0

_cal_MC = 0

_cal_MD = 0

# Constructor

def __init__(self, address=0x77, mode=1, debug=False):

self.i2c = Adafruit_I2C(address)

self.address = address

self.debug = debug

# Make sure the specified mode is in the appropriate range

if ((mode < 0) | (mode > 3)):

if (self.debug):

print ("Invalid Mode: Using STANDARD by default")

self.mode = self.__BMP085_STANDARD

else:

self.mode = mode

# Read the calibration data

self.readCalibrationData()

def readS16(self, register):

"Reads a signed 16-bit value"

hi = self.i2c.readS8(register)

lo = self.i2c.readU8(register+1)

return (hi << 8) + lo

def readU16(self, register):

"Reads an unsigned 16-bit value"

hi = self.i2c.readU8(register)

lo = self.i2c.readU8(register+1)

return (hi << 8) + lo

def readCalibrationData(self):

"Reads the calibration data from the IC"

self._cal_AC1 = self.readS16(self.__BMP085_CAL_AC1) # INT16

self._cal_AC2 = self.readS16(self.__BMP085_CAL_AC2) # INT16

self._cal_AC3 = self.readS16(self.__BMP085_CAL_AC3) # INT16

self._cal_AC4 = self.readU16(self.__BMP085_CAL_AC4) # UINT16

self._cal_AC5 = self.readU16(self.__BMP085_CAL_AC5) # UINT16

self._cal_AC6 = self.readU16(self.__BMP085_CAL_AC6) # UINT16

self._cal_B1 = self.readS16(self.__BMP085_CAL_B1) # INT16

self._cal_B2 = self.readS16(self.__BMP085_CAL_B2) # INT16

self._cal_MB = self.readS16(self.__BMP085_CAL_MB) # INT16

self._cal_MC = self.readS16(self.__BMP085_CAL_MC) # INT16

self._cal_MD = self.readS16(self.__BMP085_CAL_MD) # INT16

if (self.debug):

self.showCalibrationData()

def showCalibrationData(self):

"Displays the calibration values for debugging purposes"

# print ("DBG: AC1 = %6d" % (self._cal_AC1))

# print ("DBG: AC2 = %6d" % (self._cal_AC2))

# print ("DBG: AC3 = %6d" % (self._cal_AC3))

# print ("DBG: AC4 = %6d" % (self._cal_AC4))

# print ("DBG: AC5 = %6d" % (self._cal_AC5))

# print ("DBG: AC6 = %6d" % (self._cal_AC6))

# print ("DBG: B1 = %6d" % (self._cal_B1))

# print ("DBG: B2 = %6d" % (self._cal_B2))

# print ("DBG: MB = %6d" % (self._cal_MB))

# print ("DBG: MC = %6d" % (self._cal_MC))

# print ("DBG: MD = %6d" % (self._cal_MD))

def readRawTemp(self):

"Reads the raw (uncompensated) temperature from the sensor"

self.i2c.write8(self.__BMP085_CONTROL, self.__BMP085_READTEMPCMD)

time.sleep(0.005) # Wait 5ms

raw = self.readU16(self.__BMP085_TEMPDATA)

if (self.debug):

#print ("DBG: Raw Temp: 0x%04X (%d)" % (raw & 0xFFFF, raw))

return raw

def readRawPressure(self):

"Reads the raw (uncompensated) pressure level from the sensor"

self.i2c.write8(self.__BMP085_CONTROL, self.__BMP085_READPRESSURECMD + (self.mode << 6))

if (self.mode == self.__BMP085_ULTRALOWPOWER):

time.sleep(0.005)

elif (self.mode == self.__BMP085_HIGHRES):

time.sleep(0.014)

elif (self.mode == self.__BMP085_ULTRAHIGHRES):

time.sleep(0.026)

else:

time.sleep(0.008)

msb = self.i2c.readU8(self.__BMP085_PRESSUREDATA)

lsb = self.i2c.readU8(self.__BMP085_PRESSUREDATA+1)

xlsb = self.i2c.readU8(self.__BMP085_PRESSUREDATA+2)

raw = ((msb << 16) + (lsb << 8) + xlsb) >> (8 - self.mode)

if (self.debug):

#print ("DBG: Raw Pressure: 0x%04X (%d)" % (raw & 0xFFFF, raw))

return raw

def readTemperature(self):

"Gets the compensated temperature in degrees celcius"

UT = 0

X1 = 0

X2 = 0

B5 = 0

temp = 0.0

# Read raw temp before aligning it with the calibration values

UT = self.readRawTemp()

X1 = ((UT - self._cal_AC6) * self._cal_AC5) >> 15

X2 = (self._cal_MC << 11) / (X1 + self._cal_MD)

B5 = X1 + X2

temp = (int(B5 + 8) >> 4) / 10.0

if (self.debug):

#print ("DBG: Calibrated temperature = %f C" % temp)

return temp

def readPressure(self):

"Gets the compensated pressure in pascal"

UT = 0

UP = 0

B3 = 0

B5 = 0

B6 = 0

X1 = 0

X2 = 0

X3 = 0

p = 0

B4 = 0

B7 = 0

UT = self.readRawTemp()

UP = self.readRawPressure()

# You can use the datasheet values to test the conversion results

# dsValues = True

dsValues = False

if (dsValues):

UT = 27898

UP = 23843

self._cal_AC6 = 23153

self._cal_AC5 = 32757

self._cal_MB = -32768;

self._cal_MC = -8711

self._cal_MD = 2868

self._cal_B1 = 6190

self._cal_B2 = 4

self._cal_AC3 = -14383

self._cal_AC2 = -72

self._cal_AC1 = 408

self._cal_AC4 = 32741

self.mode = self.__BMP085_ULTRALOWPOWER

if (self.debug):

self.showCalibrationData()

# True Temperature Calculations

X1 = ((UT - self._cal_AC6) * self._cal_AC5) >> 15

X2 = (self._cal_MC << 11) / (X1 + self._cal_MD)

B5 = X1 + X2

if (self.debug):

#print ("DBG: X1 = %d" % (X1))

#print ("DBG: X2 = %d" % (X2))

#print ("DBG: B5 = %d" % (B5))

#print ("DBG: True Temperature = %.2f C" % ((int(B5 + 8) >> 4) / 10.0))

# Pressure Calculations

B6 = B5 - 4000

X1 = (int(self._cal_B2) * int(B6 * B6) >> 12) >> 11

X2 = (int(self._cal_AC2) * int(B6)) >> 11

X3 = X1 + X2

B3 = (((self._cal_AC1 * 4 + X3) << self.mode) + 2) / 4

if (self.debug):

#print ("DBG: B6 = %d" % (B6))

#print ("DBG: X1 = %d" % (X1))

#print ("DBG: X2 = %d" % (X2))

#print ("DBG: X3 = %d" % (X3))

#print ("DBG: B3 = %d" % (B3))

X1 = int(self._cal_AC3 * B6) >> 13

X2 = (int(self._cal_B1) * (int(B6 * B6) >> 12)) >> 16

X3 = ((X1 + X2) + 2) >> 2

B4 = (self._cal_AC4 * (X3 + 32768)) >> 15

B7 = (UP - B3) * (50000 >> self.mode)

if (self.debug):

#print ("DBG: X1 = %d" % (X1))

#print ("DBG: X2 = %d" % (X2))

#print ("DBG: X3 = %d" % (X3))

#print ("DBG: B4 = %d" % (B4))

#print ("DBG: B7 = %d" % (B7))

if (B7 < 0x80000000):

p = (B7 * 2) / B4

else:

p = (B7 / B4) * 2

if (self.debug):

#print ("DBG: X1 = %d" % (X1))

X1 = (int(p) >> 8) * (int(p) >> 8)

X1 = (X1 * 3038) >> 16

X2 = (-7357 * int(p)) >> 16

if (self.debug):

#print ("DBG: p = %d" % (p))

#print ("DBG: X1 = %d" % (X1))

#print ("DBG: X2 = %d" % (X2))

p = p + ((X1 + X2 + 3791) >> 4)

if (self.debug):

#print ("DBG: Pressure = %d Pa" % (p))

return p

def readAltitude(self, seaLevelPressure=101325):

"Calculates the altitude in meters"

altitude = 0.0

pressure = float(self.readPressure())

altitude = 44330.0 * (1.0 - pow(pressure / seaLevelPressure, 0.1903))

if (self.debug):

#print ("DBG: Altitude = %d" % (altitude))

return altitude

return 0

*************************************************************************************************************

The last called is Adafruit_I2C . I suppose you don't need it...

Anyway the running script ends on this:

Temp: 27.50 C

Pressure: 1005.29 hPa

Altitude: 66.92

Wait....

https://api.thingspeak.com/update?api_key=XXXXXXXXXXXXX&field1=16&field2=24&field3=66.

https://api.thingspeak.com/update?api_key=XXXXXXXXXXXXX&field1=8&field2=28&field3=66.

https://api.thingspeak.com/update?api_key=XXXXXXXXXXXXX&field1=9&field2=29&field3=66.

.....AND KEEP DOING THIS WITHOUT SHOWING ON CHARTS....

If you have some ideea why not, please help me

Thank you

Peter Veres

peter veres 2020-2-21

Thank you I can see the post.

Something like this it's in my mind:

https://www.mathworks.com/help/thingspeak/analyze-channel-data-to-send-email.html

https://thingspeak.com/channels/276330

I see a picture from the plant. It is live feed or just a picture?

Didn't found refference about how to embed live feed from pi camera in Thingspeek...

Do you have tips where to look?

Thank you again

Peter

Vinod 2020-2-21

If you have an IP camera that is pointed at your plant, you can have that image embedded on your ThingSpeak channel. It's not a streaming video, but it is a live image taken when the page is refreshed.

Here's an example:

1) Create a new MATLAB visualization and put this code in it:

imshow(webread('http://24.73.89.162/axis-cgi/jpg/image.cgi',weboptions('ContentType','image')),'border','tight');

2) Add this MATLAB visualization to your channel's view.

If you have an Android phone, you can get one of the many IP camera apps and try it out pretty easily.

请先登录，再进行评论。

Answer 6

peter veres 2020-2-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/500306-unable-to-post-data-on-channel#answer_416790

Hi again

I mentioned that I want to use the Pi camera, not IP Camera. A refreshed image will be enough.

How can I embed the image captured to Thingspeak? And the refreshment of the measurements also?

Some ideea please? How tocreate a channel for the picture?

Do I need fixed IP address? I suppose not.

Thank you

Peter

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Vinod 2020-2-22

编辑：Vinod 2020-2-22

You can convert your raspberry pi camera to an IP camera easily. See here for information:

https://hackmypi.com/PiCamPart1.php

请先登录，再进行评论。

Unable to Post Data on Channel

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

采纳的回答

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

更多回答（5 个）

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

6 个评论
显示 4更早的评论隐藏 4更早的评论

9 个评论
显示 7更早的评论隐藏 7更早的评论

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

社区

另请参阅

类别

标签

产品

Community Treasure Hunt

Unable to Post Data on Channel

0 个评论 显示 -2更早的评论隐藏 -2更早的评论

采纳的回答

0 个评论 显示 -2更早的评论隐藏 -2更早的评论

更多回答（5 个）

0 个评论 显示 -2更早的评论隐藏 -2更早的评论

1 个评论 显示 -1更早的评论隐藏 -1更早的评论

6 个评论 显示 4更早的评论隐藏 4更早的评论

9 个评论 显示 7更早的评论隐藏 7更早的评论

1 个评论 显示 -1更早的评论隐藏 -1更早的评论

社区

另请参阅

类别

标签

产品

Community Treasure Hunt

WeChat

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

6 个评论
显示 4更早的评论隐藏 4更早的评论

9 个评论
显示 7更早的评论隐藏 7更早的评论

1 个评论
显示 -1更早的评论隐藏 -1更早的评论