I am collecting Data at 1 minute intervals using esp8266, the data is then sent to Thingspeak on the minute intervals. However I would like to store the data collection on the esp Ram. I am using batteries to power the circuits , if I can store the data and send it on demand I can save quite a bit of battery energy (used up by wifi) - (I already use sleep mode between intervals). As well as using Thingspeak to visuliase the data, I also use a third part app called Thingview which 'feeds' off thingspeak. I am looking for a way to trigger the 'data send' upon opening thinkspeak chanel,so rather than sending every minute it might need to be accessed two or three times a day, is this possible?
Thanks Edward
4 Comments
Time Descending
Thanks Chris
I dont think this example adresses the crux of the query.
What I am trying to achieve is store the data for a period of time on the ESP8266 and only send it when I send a trigger from thingspeak .The example here stores the data but sends it a preset intervals which is not what I am looking for.
Thanks Edward
Its a terrific idea.
This example shows what you need though it doesnt go into WiFi sleep in between writes
Let us know if that helps.
Aha, sorry about that. If your device is asleep, I dont think you will be able to to trigger it from ThingSpeak. But you could have the device sleep and wake up intermittantly and check a flag at a ThingSpeak channel. If the flag is high, then write the data.
Is the data expensive to collect? In most cases, I have the device report regularly, and then just query that data that I want.
I have this MQTT read write example that shows how to drigger a measurement form ThingSpeak, but I dont think it fits your needs either.
I am transmitting the data via wif and using wifi consumes quite a bit of battery, Another way I found was I think as you say put a flag in one of the fields and as you say if it matches the condition in the code it will send data - not tried it yet but will do soon
thanks
Sign in to participate
