collectd-python plugin to read data from ethermine.org

collectd.conf

<Plugin python>
    ModulePath "/home/imil/collectd"
    Import "ethermine"
    <Module ethermine>
        wallet "0xf00f00f00"
        interval "300"
        url "https://ethermine.org/api/miner_new"
    </Module>
</Plugin>

ethermine.py

from __future__ import division
import requests
import collectd

cfg = {
    'wallet': '0xf00b',
    'interval': '300',
    'url': 'http://localhost'
}

def readconf(config):
    for node in config.children:
        for k in ['wallet', 'interval', 'url']:
            if node.key == k:
                cfg[k] = node.values[0]
                collectd.info('{0} set to: {1}'.format(k, cfg[k]))

    cfg['url'] = '{0}/{1}'.format(cfg['url'], cfg['wallet'][2:])

def readvals():

    collectd.info('calling {0}'.format(cfg['url']))
    try:
        j = requests.get(cfg['url']).json()
    except ValueError, e:
        collectd.info(str(e))
        return

    val = [
        {
            'k': 'reportedHashRate',
            'v': j['reportedHashRate'].split()[0],
            't': 'gauge' 
        },
        {
            'k': 'unpaid',
            'v': float(j['unpaid']) / 1000000000000000000,
            't': 'gauge'
        },
        { 'k': 'usdPerMin', 'v': j['usdPerMin'], 't': 'gauge' }
    ]

    for v in val:
        c = collectd.Values(type = v['t'])
        c.plugin = v['k']
        c.dispatch(values = [v['v']])

collectd.register_config(readconf)
collectd.register_read(readvals, int(cfg['interval']))

Having some trouble getting this working...
collectd to influxdb is working since I can see system measurements showing up in my collectd_db, but none of this plugin's measurements are showing up.

I verified that the python plugin is loaded and I see the ethermin.pyc file being generated after restarting collectd so plugin is at least executed.
I also added the measurement keys to my influxdb's types.db file for collectd.

Wallet and URL are the valid values, and even inserted them in both the py and the Plugin def in the conf to be sure.

Ultimately I want to add individual worker measurements, but hitting a roadblock with just the initial setup of the base measurements.

Don't know what step I missed here.

@jedimstr did you have a look to the logs? Usually collectd logs to syslog and has pretty comprehensive output