Updating Thingspeak channel field1 with array of data

The ThingSpeak community site has been upgraded to a new site. This site is currently in read-only mode. You can ask questions or post and read discussions on the new site.

Updating Thingspeak channel field1 with array of data

July 25, 2019
4:06 am

cmti

Silver

Members

Forum Posts: 13

Member Since:
May 22, 2019

Offline

Hello,

I have an array of data of length 100.Is it possible to update channel's field1 alone with array of data for every 15 sec

July 25, 2019
4:35 pm

cstapels

Moderator

Members

Moderators

Forum Posts: 885

Member Since:
March 7, 2017

Offline

The maximum for each field is 255 characters. It is not the recommended use to put more than one data point in each field, but it is possible to put multiple values in. You will need to parse the values when you retrieve the data.
You can also cut your data up into multiple segments and write it across the 8 fields every 15 seconds.

July 26, 2019
12:43 pm

cmti

Silver

Members

Forum Posts: 13

Member Since:
May 22, 2019

Offline

How can we write multiple values in one filed ?

July 28, 2019
8:42 pm

cstapels

Moderator

Members

Moderators

Forum Posts: 885

Member Since:
March 7, 2017

Offline

ThingSpeak will treat your entry as a string so you can use any delimiter you like to add multiple values. If they are fixed width, you wont need any delimiter at all. When you update the field, simply append all the values to the end of the GET. For example:
https://api.thingspeak.com/update?api_key=xxxxxxxxxxxxxxxx&field1=0123456abcdefg_or_1,2,3,4,5,a,b,c,d
This command will write
"0123456abcdefg_or_1,2,3,4,5,a,b,c,d"
to field1.
Then you can parse it to separate the values.
If you add &field2= you can addinformation to field 2 in the same write.
https://api.thingspeak.com/update?api_key=xxxxxxxxxxxxxxxx&field1=0123456abcdefg_or_1,2,3,4,5,a,b,c,d&field2=4.345

December 10, 2020
1:32 am

Momo

New Member

Members

Forum Posts: 2

Member Since:
June 3, 2020

Offline

I know this post is old, Idk if you will see this but I was wondering how to do the same thing but in matlab using thingspeakwrite function to upload an array of number to one field. Like [4,25,78,97] to filed 2.

December 15, 2020
7:16 am

cstapels

Moderator

Members

Moderators

Forum Posts: 885

Member Since:
March 7, 2017

Offline

FYI, MATLAB answers is the preferred location for ThingSpeak Community support.

My advice: make your array into a string before writing to the field.

Forum Timezone: America/New_York

Most Users Ever Online: 166

Currently Online:
26 Guest(s)

Currently Browsing this Page:
1 Guest(s)