Hello, I'm using V3.14.
I want to connect a microcontroller to read serial DATA, but they seem dead: No voltage on VCC and no changes on TX or RX ports (with the voltmeter though), what would be a sign of life. Same in the three. And cannot see any option in the remote console or manual to enable or disable these ports.
Of course I also tried reading with an Arduino on every pin of the three ports at given specs (19200 bauds, 8N1) with no activity detected.
I think you are trying to read the wrong port.
The VE.direct on the Cerbo isn't an output, the signals are coming from the device on the other side(MPPT, BMV/SmartShunt etc.).
What data do you want to read?
Take a look at Modbus and MQTT.
Hello Matthias, thanks for the info, didn't know.
I just wanted a simple and quick way to obtain battery percentage load power and PV power. I have a Quattro and two Smartsolar MPPT. So if those are the valid ve.direct port I should then read all to obtain what I want, so the only viable solution is modbus I guess.
I'm going to use modbus in the future but I wanted to start with some simple because time constraints.
My 2 cents.
MQTT on LAN is simpler but depends on what the end use is. Most home automation systems (such as Home Assistant) support MQTT directly.
see dbus-mqtt and make sure you read the section about keepalive.
See also
MQTT Explorer - So you can poke around and see what is available on the device.
