@ -91,9 +91,6 @@ The AhoyDTU will publish on the following topics
## Active Power Limit via Serial / Control Page
URL: `/serial`
If you leave the field "Active Power Limit" empty during the setup and reboot the ahoy-dtu will set a value of 65535 in the setup.
That is the value you have to fill in case you want to operate the inverter without a active power limit.
If the value is 65535 or -1 after another reboot the value will be set automatically to "100" and in the drop-down menu "relative in percent persistent" will be set. Of course you can do this also by your self.
You can change the setting in the following manner.
Decide if you want to set
@ -115,24 +112,17 @@ Also an absolute active power limit below approx. 30 Watt seems to be not meanfu
### Generic Information
The AhoyDTU subscribes on three topics `<TOPIC>/ctrl/#`, `<TOPIC>/setup` and `<TOPIC>/status`.
The AhoyDTU subscribes on following topics:
- `<TOPIC>/ctrl/limit/<INVERTER_ID>`
- `<TOPIC>/ctrl/restart/<INVERTER_ID>`
- `<TOPIC>/setup/set_time`
👆 `<TOPIC>` can be set on setup page, default is `inverter`.
👆 `<INVERTER_ID>` is the number of the specific inverter in the setup page.
- A persistent limit is only needed if you want to throttle your inverter permanently or you can use it to set a start value on the battery, which is then always the switch-on limit when switching on, otherwise it would ramp up to 100% without regulation, which is continuous load is not healthy.
- You can set a new limit in the turn-off state, which is then used for on (switching on again), otherwise the last limit from before the turn-off is used, but of course this only applies if DC voltage is applied the whole time.
- If the DC voltage is missing for a few seconds, the microcontroller in the inverter goes off and forgets everything that was temporary/non-persistent in the RAM: YieldDay, error memory, non-persistent limit.
## Additional Notes
### MI Inverters
- AhoyDTU supports MI type inverters as well, since dev. version 0.5.70.
- MI inverters are known to be delivered with two different generations of firmwares: inverters with serial numbers 10x2 already use the 3rd generation protocol and behave just like the newer HM models, *the follwoing remarks do not apply to these*.
- Older MI inverters (#sn 10x1) use a different rf protocol and thus do not deliver exactly the same data. E.g. the AC power value will therefore be calculated by AhoyDTU itself, while other values might not be available at all.
- Single and dual channel 2nd gen. devices seem not to accept power limiting commands at all, the lower limit for 4-channel MI is 10% (instead of 2% for newer models)
- 4-channel MI type inverters might work, but code still is untested.
DPRINTLN(DBG_INFO,F("Inverter ")+String(iv->id)+F(" has ")+msg+F("accepted power limit set point ")+String(iv->powerLimit[0])+F(" with PowerLimitControl ")+String(iv->powerLimit[1]));
//DPRINTLN(DBG_INFO, F("Inverter ") + String(iv->id) + F(" has ") + msg + F("accepted power limit set point ") + String(iv->powerLimit[0]) + F(" with PowerLimitControl ") + String(iv->powerLimit[1]));
DPRINTHEAD(DBG_INFO,iv->id);
DBGPRINTLN(F("has ")+msg+F("accepted power limit set point ")+String(iv->powerLimit[0])+F(" with PowerLimitControl ")+String(iv->powerLimit[1]));
iv->clearCmdQueue();
iv->enqueCommand<InfoCommand>(SystemConfigPara);// read back power limit
`ahoy.py` has been successfully tested with the following setup
- RaspberryPi Model 2B (any model should work)
- RaspberryPi Model 2B, 4B (any model should work)
- NRF24L01+ Radio Module connected as described, e.g., in [2]
(Instructions at [3] should work identically, but [2] has more
pretty pictures.)
- or the [PaHoy board](https://github.com/DM6JM/PaHoy/)
- TMRh20's 'Optimized High Speed nRF24L01+ Driver' [3], installed
as per the instructions given in [4]
- Python Library Wrapper, as per [5]
- or the easy way, using [pyRF24](https://github.com/nRF24/pyRF24)[6]
How to talk to the nRF24L01+ in Python?
---------------------------------------
Either you make use of the way proposed in the following, using the NRF24 Python Wrapper and the 'Optimized High Speed nRF24L01+ Driver' OR you just use pip and let it install pyRF24.
- If you go with pyRF24, all that needs to be done is installing pyRF24 as described in [6]. Please be aware that not all examples provided in this repo are prepared to use pyRF24. It might be nescessary to adjust the imports from RF24 to pyRF24 to get them running. Once you installed pyRF24, go on at 'Required python modules'
- If you go with the RF24 wrapper, do the following steps
Building the NRF24 Python Wrapper
---------------------------------
@ -220,7 +228,12 @@ Example injects exactly the same as we normally use to poll data
This allows for even faster hacking during runtime
Running it as a service
-----------------------
If you want to run directly from the start, you might want to install it as a service.
Depending on if you want to run it once a user is logged in or as soon as the system is booted, two service examples are included.
ahoy.service allows you to start it as a user service upon login.
ahoy_system.service allows you to start it as a system service already before login without user interaction.
lumapu
2 years ago