Closed asadislam94 closed 7 years ago
Maybe we can use a large portion of flash to do this by writing circle small data.
IMO this wouldn't really help anything. The only reason your buffer should be full is if WiFi is disconnected, not a power failure. Since I assume you can't predict when the failure occurs, it could happen at any random point, like during the middle of a flash read/write operation and then you would potentially be sending corrupt data. Unless you mean a power failure that affects your AP but not your ESP?
There can be a situation where a power failure occurs to ESP during a network outage. If this instance occurs then you may want to keep the important publish data saved for when the device turns back on.
However I just realized that this doesn't need to be implemented on the queue. We can just keep the "important data" in flash and send it using QoS=2. If the data is sent correctly it can be deleted otherwise on boot-up we can have a check to see any data on flash and send it.
Is it possible to create the queue on flash memory to make sure we still have data during power failure?