Is there a relatively straightforward way of obtaining power data at higher than normal rates from my EmonTx4? Currently I’m using the standard MQTT route to send the household import/export power to Home Assistant every 10 seconds. This is used to adjust the power to/from our vehicle-to-home charger. Updating the V2H power once every 10 seconds is a bit slow when the electric oven is turning on and off frequently to maintain temperature.
I guess I’m hoping that behind the scenes, the power readings are being continuously updated, and the values stored in a register.
I am just trying to scope whether this might be within my (pretty meagre) programming capabilities.
You can use the d<x.xx> command to set the data period. So, if you want 1 second, the command would be d1.0 - no programming needed. You can just connect over serial, or using the emonCMS configuration page.
Adding to what @awjlogan wrote, although you don’t mention emonCMS, a Feed will only record the last data it received in each 10 s slot - so it will record the 1-second average power over the last second before the whole minute, 10, 20, 30 etc seconds past the minute (by Internet time). But if you also send the Energy values and log them in emonCMS, those will be accurate as they update continuously internally in the emonTx.