Temperature and Voltage monitoring on RPI 3b

Hello, is there anyway i can monitor temperatures and power usage on RPI 3B Openwrt 18.06.4 ?
i've installed collectd-mod-sensors, collectd-mod-thermal and kmod-hwmon-bcm2835 but i still can't get the plugins to work for luci statistics, i have the thermal plugin and sensors plugin enabled but they're not displaying anything