Hi everyone, I’ve been developing a IoT monitor and sending the data to ThingSpeak.com. The application is monitoring off grid micro Wind Turbines in rural Peruvian communities.
I’m using an Arduino Uno as a sensor interface, and then that’s connected to a Raspberry Pi 3 with a USB modem. I had previously been using big name chips, but we were paying between $7 and $10 a month as we were using standard packages from the likes of Claro and Bitel (two big networks here in Peru). I saw the Hologram as a way of reducing our data spend, but I’ve had a bit of a shock…
Using Node Red, I’ve got 10 minute average data being sent to 8 channels on ThingSpeak, in addition I have 2 hourly figures (generated and consumed power). Honestly I’m not sure how much data that actually is, but a string of float numbers can’t require that much data can it?
I’ve trialed the device with an Hologram SIM, and the data usage seems rather erattic.
I can see the regular 10 minute transmission between 11kb and 32kb, but then have these random ones of a few meg?
Could the Pi be downloading a minor update? I was under the impression those are sudo commands?
I’d appreciate any comments on this, as I’m rather puzzled;
a) does 11kb - 32kb seem about correct for 10 channels of data?
b) will the Pi do minor uploads.
At the start I topped up with $5 thinking that would be fine for the month, but at this rate, it’ll be cheaper to go back to the standard Peruvain SIMS.
Thanks for helping a comms newbie out!