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lumapu / ahoy

Various tools, examples, and documentation for communicating with Hoymiles microinverters
https://ahoydtu.de
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Duration of sending and receiving a packet / Duty cycle #1683

Open michaelotto opened 1 week ago

michaelotto commented 1 week ago

I have a question regarding the general protocol: How long does sending a request to the inverter take (in milliseconds)? For how long does the inverter send back its information (in milliseconds)?

I'm a asking because strictly, it isn't legally allowed to send more than 1% of an hour in the 868 MHz band (called "duty cycle").

So for example, if I set the interval of how often the inverter should be updated to 5 seconds, then the combined sending and receiving of data must not take longer than 50 ms. (3600 seconds * 1% = 36 seconds of "sending time" per hour / 720 updates per hour = 50 ms). It may be so that each side of this is allowed 1% though, not sure about this.

Loetnase commented 1 week ago

Maybe that gives you a first idea, first set this 2 hocks in the System for the logging System and then lock for the logging in the Web Konsole. You see there the transmit time, the recive time and the kompleet loop time. Then take your intervalltime and ........ Web Konsole I hope that will help you.

michaelotto commented 1 week ago

Thanks for looking into it! Most of this time it looks like it's after TX and waiting for/processing RX. Not sure one can see how much time was really spent doing "on air time".

If it really were around 210 ms, then the maximum allowed polling interval would be around 20-25 seconds.

knickohr commented 1 week ago

These are idle times how long the DTU is waiting for an incomming RX or for the conplete loop. The real TX is a way shorter.