melanogaster on Unable to clear a channel via Arduino
Thanks for the Reply. I allready tried many changes in the HTTP method. For example i tried this Code: String apiKeyUser = XXXXXXXXXXXXXXXXXXXX; String apiKeyChannel = XXXXXXXXXXXXXXXXXXXX; String...
View Articlerw950431 on Unable to clear a channel via Arduino
The docs for delete are at https://au.mathworks.com/help/thingspeak/delete-a-channel.html You definitely need the user API key not the channel one. Its possible that DELETE will only work over HTTPS so...
View Articlemelanogaster on Unable to clear a channel via Arduino
Thanks for the Answer. As it reads in the Thread Title I am trying to CLEAR a Channel with an Arduino. Clearing and deleting a channel use the same DELETE but different adresses. Clearing Channel:...
View Articlemelanogaster on Unable to clear a channel via Arduino
Trial and Error got me the right Code. If anyone got the same Problem, here is my working Code: //"Clear a Channel" https://de.mathworks.com/help/thingspeak/clear-a-channel.html channelID = "XXXXX";...
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Aitorto8 on Update multiple fields with one write
Hi! Could you share your code with us? I'm working on the same project and I have some problems with the sketch. Thank you.
View ArticleMarcFinns on MQTT losing data
Hi, i have an ESP8266 thing that has been flawlessly logging data for months, one data point per minute. However I recently realised that it is now skipping quite a lot of points, sometimes going for...
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melanogaster on Update multiple fields with one write
Aitorto8 said Hi! Could you share your code with us? I'm working on the same project and I have some problems with the sketch. Thank you. //"Update a Channel Feed"...
View ArticleAitorto8 on Problem with Arduino + SIM908 (GPRS module)
Hi, I want to upload data to Thingspeak using the SIM908 module, but I don't get any answer in my Thingspeak channel. I'm new with this and if you could help me it would be great. Here is the code:...
View ArticleJoel on Widget for smart watch Samsung Gear S2
Hi, I just purchased a Gear S3 and would very much like to have data from Thingspeak on my wrist, have you made any progress with this or found any solution?
View Articlenimdixon@gmail.com on React to a change on more than one field help
I have a channel with 3 fields. Each field will either store a 1 or a 0, so true or false effectively. Field 3 is a logical AND of field 1 and field 2 using the Matlab Analysis app. What I want to do...
View Articlechinthakajay on Clearing a Private Channel using REST API
Hi, I have tried to clear my channel using https://api.thingspeak.com/channels/CHANNEL_ID/feeds.json api_key=USER_API Of course CHANNEL_ID & USER_API replaced correctly. When i send this request by...
View Articlecstapels on Clearing a Private Channel using REST API
Your browser address bar is not capable of sending a DELETE request. You can use other software such as POSTMAN to make other HTTP requests, including DELETE and POST. it looks like you found the...
View ArticleFlying_Dutchman on Retrieve value 30 writes ago
Hi, on ESP8266 with Arduino, I want to calculate if the temperature went up or down: compare the last write to ThingSpeak with 30 writes ago. Anybody ideas on if it is possible to pull the last...
View Articlecstapels on React to a change on more than one field help
You could use a fourth field. Put data in field 4 each time you update field 1 or field 2. Then trigger your react on field 4 with new data and have your matlab analysis check for data in field 1 or 2...
View ArticleTonibco6 on Dragino-KPN-ThingSpeak
Hi all, I am actually developing an IOT project based on LoRa module. To be specific, I am using Dragino device to send temperature-Humidity data from sensors. The point is that I am sensing this data...
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piajola on Retrieve value 30 writes ago
Hi Flying_Dutchman In Apps - MATLAB Analysis Run this as is (copy-paste) and see ouput windows % semicolon at the end hides data (not shown) readChannelID = YoUrChAnNeLnUmBeR0123; %% Read Data %%...
View Articlerw950431 on Retrieve value 30 writes ago
If you need to do this client-side and cant run the Matlab script the API can be used see https://au.mathworks.com/help/thingspeak/get-channel-field-feed.html for the details but the basic API call is...
View Articlecstapels on Retrieve value 30 writes ago
if you know the entry ID of the last entry, you can subtract 30 and get it like this GET https://api.thingspeak.com/channels/CHANNEL_NUMBER/fields/FIELD_NUMBER/"+String(entryID-30)+".json"; If you dont...
View ArticleJasonW on MQTT losing data
I'm seeing some loss of data points as well, I'm looking into it.
View ArticleMarcFinns on MQTT losing data
Please keep us posted. The loss I am seeing is in the range of 35-45%. Let me know if you need more details. Thank you!
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