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Posts published in June 2020

[Question]Contiki connectivity help

i want to ask a question, i have a measurement IoT device with Contiki OS installed and i want them to connect directly to the fiware IoT Agent, So in order to do that i have to write C++ code in the node to do Post directly to fiware ? can anyone help...

Looking for the best way to push commands to my ESP

Hi first of all, first-time poster so sorry if I broke any rules.
So I'm building a connected working buddy and I'm looking for the best way to send commands to my device from a web service hosted somewhere in the cloud. Obviously I cannot send a request directly to a local IP from outside of the network and port forwarding is not an option.
I'm contemplating between:

  1. Something like a polling system where the ESP will check a URL every few seconds and if there is a new command for it, the ESP will see that on the URL and send an acknowledgment that the message has been received.
  2. A WebSocket connection between the ESP and the web service where messages will be instantaneously received. I have seen some Websocket libs for ESP ( https://github.com/espressif/esp-idf/tree/7d75213674b4572f90c68162ad6fe9b16dae65ad/components/esp_websocket_client )
  3. Something else?

What would be the best option to tackle this problem? and what would be the easiest?

Thanks! also, non-native English speaker. Bear with me :)

submitted by /u/reversetec
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Weather data

My company builds water control gates used on farms and municipal storm water basins that are automated using a variety of local sensors to monitor environmental conditions. We want to get site specific internet-based weather and remotely release water...

Is it possible to use RTC for a loop

I know that RTC is more used for long periods of time so i don´t know if this can be the case to use it the system is going to send data to a Lorawan Gateway every 10 minutes, i have a level sensor that is going to trigger and stop an alarm for floods:...