How to read the fieldname from a field in ThinkSpeak when using ThinkSpeak library for Arduino

How to read the fieldname from a field in ThinkSpeak when using ThinkSpeak library for Arduino?

[Christopher Stapels]

I think you can use readRaw and the read settings API.

String readRaw (channelNumber, URLSuffix, readAPIKey)

Make sure to use the user API key to get the channel information instead of the channel specific API keys

[Aarnout Wieers]

I tried using readRaw as shown below, with XXXXXX being a real channel number and readAPIKey also being the real read key + activated debugging comments; See ERROR below

ts::readRaw (channelNumber: XXXXXXXX readAPIKey: XXXXXXXXXX suffixURL: "/fields/1?results=2?")

Connect to default ThingSpeak: api.thingspeak.com:80...Success.

GET "/channels/XXXXXXX/fields/1?results=2?"

Got Status of 200 (which is good)

ERROR: Didn't find Content-Length header

Why do I get this error? And how do I solve this?

I also tried another command:

ts::readRaw (channelNumber: XXXXXX readAPIKey: XXXXX suffixURL: "/fields/1/Last")

Connect to default ThingSpeak: api.thingspeak.com:80...Success.

GET "/channels/XXXXX/fields/1/Last"

Got Status of 200

Content Length: 2

Found end of header

Response: "-1"

Read: "-1"

disconnected.

The actual last value is NOT -1, but 23.0

And tried another one:

ts::readRaw (channelNumber: XXXXXX readAPIKey: XXXXXXX suffixURL: "/channels")

Connect to default ThingSpeak: api.thingspeak.com:80...Success.

GET "/channels/XXXXXX/channels"

Got Status of 302

disconnected.

The thinkspeak library used is version 2.0.0

It seems like never any data is returned?

Using the same commands in a browser it works fine

Can anybody help me to resolve these problems or point me to what I'm doing wrong

Actual code used is below, with suffixURL changed in respectively

case 1) String("/fields/1?results=2?")

case 2) String("/fields/1/Last")

case 3) String("/channels.json")

Main code lines:

String JsonStr = ThingSpeak.readRaw(channelID, String("/channels.json"), readAPIKey);

Serial.print("Response: "); Serial.println(JsonStr);

Also increasing the server response time to 10sec did not make any changes (not expecting this to be a connectivity or response issue)

[Christopher Stapels]

Case 3 is the one I meant for you to try. I'm not sure why you got the -302 error, was it consistant? For the channels endpoint, you need to supply User API key.