Support for Revolt NC-5461 energy meter

[diplix]

http://www.pearl.de/a-NC5462-5452.shtml

this is what rfxtrx reports:

i guess these are the parameters pyRFXtrx needs to recognise:

• Instant Power
• total usage

would of course be nice to also get:

• Voltage
• Current
• Frequency

right now rfxtrx reports the values every 4 seconds, but pyRFXtrx (and home assistant) don’t recognise it.

if i knew how to get the raw output from rfxtrx, i’m glad to provide it.

[diplix]

https://github.com/rfxcom/node-rfxcom/blob/188e8187e0f321121f29f9ff7753267f56e8335e/lib/rfxcom.js#L1145

/**
 *
 * Called by the data event handler when data arrives from a REVOLT power measurement
 * device (packet type 0x5c).
 *
 */
RfxCom.prototype.elec5Handler = function (data) {
    var self = this;
    var evt;
    evt = {
        subtype: data[0],
        seqnbr: data[1],
        id: "0x" + self.dumpHex(data.slice(2, 4), false).join(""),
        voltage: data[4],
        current: (data[5]*256 + data[6])/100,
        power:  (data[7]*256 + data[8])/10,
        energy:  (data[9]*256 + data[10])*10,  // units watt-hours
        powerFactor: data[11]/100,
        frequency: data[12],
        rssi: (data[13] >> 4) & 0xf
    };
    self.emit("elec5", evt);
};

[diplix]

this is the raw output that i could receive with receive.py:

Recv: 0x0f 0x5c 0x01 0x00 0x23 0x95 0xbd 0x00 0x00 0x00 0x00 0x00 0x04 0x00 0x32 0x80
Recv: 0x0f 0x5c 0x01 0x01 0x23 0x95 0xbc 0x00 0x00 0x00 0x00 0x00 0x04 0x00 0x32 0x80
Recv: 0x0f 0x5c 0x01 0x02 0x23 0x95 0xbd 0x00 0x00 0x00 0x00 0x00 0x04 0x00 0x32 0x80
Recv: 0x0f 0x5c 0x01 0x03 0x23 0x95 0xbd 0x00 0x00 0x00 0x00 0x00 0x04 0x00 0x32 0x80
Recv: 0x0f 0x5c 0x01 0x04 0x23 0x95 0xbd 0x00 0x00 0x00 0x00 0x00 0x04 0x00 0x32 0x80
Recv: 0x0f 0x5c 0x01 0x05 0x23 0x95 0xbd 0x00 0x00 0x00 0x00 0x00 0x04 0x00 0x32 0x80

[Danielhiversen]

Hey.
To add support for your device, you have to make a new class in the lowlevel.py file.
A good start would be to duplicate the this class
https://github.com/Danielhiversen/pyRFXtrx/blob/master/RFXtrx/lowlevel.py#L1755
And then modify the protocol to match the one you have found.

Then you have to add

    elif data[1] == 0x5c:
        pkt =  Energy5()

here https://github.com/Danielhiversen/pyRFXtrx/blob/master/RFXtrx/lowlevel.py#L41.

[diplix]

tnx. figured that out after studying the code and almost done, too. problem is: i’m a lousy programmer, there’s still something buggy. i’ll keep trying.

[Danielhiversen]

You can open a pull request with you wip code.
Then it will be easier for people to comment and help.