I created an Arduino library for VE.Direct. It reads all name/value pairs from the connected device and presents a public buffer of those pairs to the application. It is based on the Victron sample code from the FAQ.
asked
VE.Direct library for Arduino
Hi @cterwilliger ! Great lib !
I use it on my ESP01s to read value from my SmartSolar MPPT 75/15 with VE.Direct protocol (text mode).
I noticed that I receive a wrong value for the PID name. The value is always "HSDS" (this is the last name of the text frame (before the checksum). I don't know why ?!?!
Here is my project :
https://community.victronenergy.com/comments/77831/view.html
I added a frameCount (int) variable to your VeDirectFrameHandler class source code.
Great job ! I'm waiting for the HEX mode now :)
I saw the same errors after you mentioned it. But only with a MPPT. My BMV-712 worked fine. Anyway, double checked the VE.DIrect-Protocol and the latest version (3.30) says the maximum number of fields sent is 22. The older one (3.27) said 18. I made the change and it works properly now. I will update the github repository. In the meantime, just set "
const byte frameLen = 22;" in VeDirectFrameHandler.h and recompile.
Great! That's it... 18 value names was not enough. The MPPT has 22 value names. It works fine now... You uppercased all received char, so I had to modify my GetStringProduct function to case insensitive compare PIDs ('0xA053' <> '0XA053', see the uppercased 'X').
Thanks
Here is the view on a Internet browser connected to the ESP01s embedded web server (from outside in my case). It looks like the bluetooth screen (Android app) when it's connected to SmartSolar MPPT via bluetooth.
