How to connect and share data with multiple sensors

[Markovicz1]

Dear Cayenne-fellows,
Dear Shramik :)…,

I have a general question: I would like to connect two sensor devices together that share the data of one channels. is that feasible with Cayenne?
E.g. Device A transmits to Channel A and Device B reads from Channel A, does some math with the value and sends it back to Channel A.
That would be super useful. Thank you!

[shramik_salgaonkar]

Multiple MQTT Clients on 8266

Here is a little demo to answer the question about how to move data between 8266s. My first solution was for the 8266 receiver to query the Cayenne server using REST API, which worked until the REST API outage problem, so I finally read up MQTT and used it. [thermo] I have several 8266 reporting temperatures, pressures, etc. that all report to Cayenne every 15 sec or 5 minutes, and all these can be put together on a single web page or graph at the cayenne website, and previously fetched down…

[Markovicz1]

Thank you shramik! I would like to connect two raspberry pis together, do you have an idea whether this example will work with the python library?

Would you recommend using the paho library: paho-mqtt · PyPI

[shramik_salgaonkar]

Do you at least remember you have already asked about this and there is code for it?? How to interface two RaspberryPis over MQTT with Cayenne - #5 by Markovicz1

[Markovicz1]

Sorry Shramik, I do! Will take better care not to waste your time next time.