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I HAVE 32 SENSORS AND I WANT TO SEND SENSORS VALUE IN THINGSPEAK USING GPRS BUT IT IS NOT DONE HOW CAN I SEND?

Asked by shyam sundar jaiswal on 2 Aug 2019
Latest activity Answered by Christopher Stapels on 6 Aug 2019
I HAVE 32 SENSORS AND I WANT TO SEND SENSORS VALUE IN THINGSPEAK USING GPRS BUT IT IS NOT DONE HOW CAN I SEND?
FOR 8 SENSOR, DATA SEND TO THINGSPEAK

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4 Answers

Answer by Christopher Stapels on 6 Aug 2019

Unfortunately, it is not possible to update 32 fields across four channels in one command. You can use four commands with the same syntax that you show above to update four channels. I would put a small delay of 10-100 ms between each call to avoid a burden on the server. Dont forget to use the correct API key for each channel.
If you absolutely have to update all 32 values in a single call, it is possible to pack multiple values into one field, but then you will need to unpack them again later. For example, you could write
...?api_key=xxxxxxxxxxxxxxxx&field1=value1,value2,value3...value32
Then when you read the values from ThingSpeak, you will need to parse the date for the comma. Also, in this mode the standard field plots wont show your data, but you could write a MATLAB visualization that reads the values and parses them, and then displays them.

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Answer by Pujitha Narra on 5 Aug 2019

Hi Shyam,
Each channel in ThingSpeak has 8 fields, accommodating 8 sensors’ data. You can use multiple channels to accommodate the data of 32 sensors.

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Answer by shyam sundar jaiswal on 5 Aug 2019

but mam at a time 32 field is not updated..
how to update 32 field at the same itime.
i used this line for updating 8 field
String str="GET https://api.thingspeak.com/update?api_key=X9NE6XWDIYOO71WI&field1=" + String(temp)+" &field2= " +String(temp1)+" &field3=" +String(temp2)+"&field4=" + String(temp3)+" &field5= " +String(temp4)+" &field6=" +String(temp5)+ "&field7=" + String(temp6)+" &field8= " +String(temp7)
for updation of 32 field what i can do

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The command updates a channel with api_key=X9NE6XWDIYOO71WI. You can create 3 more channels and add commands for each of the channels.

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Answer by shyam sundar jaiswal on 5 Aug 2019

i generated 4 channel for that in thingspeak
so mam how to write syntax(command) for 32 sensor, can u please share me syntax(command) for that.

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