Sharing value of device 1 into device 2

[jameszahary]

You could do a query from the second device, although the mqtt subscription for all updates is probably better.

CaySentinel - REST API demo for ESP 8266

Here is a REST API demo for ESP 8266 with Arduino C. The genesis of this program is to solve the problem of a 8266 rebooting from a power failure and just having its original program, but no knowledge of what happened before the outage. The simple solution is that the 8266 would write its state to the EPROM every 15 seconds, but that would exhaust the 100,000 write life of the EPROM in about a week or two. So the better solution is that the 8266 would query cayenne to see what was happening t…