Can I make a suggestion? If reef pi were to support some "smart" things. Maybe the direction to go is where I was going before I found reef pi. SONOFF.
They have several different things based on the esp8266 modules and can be flashed with firmware with API calls that could be used by reef pi.
Sonoff has a wifi controllable relay, a 4 channel relay, smart plugs, a temp monitoring and controll outlet that uses either a ds18b2p or a temp/humidity sensor and a power monitoring module.
They can be flashed to firmwares that allow MQTT or IFTTT control which I think could be used to integrate to reef pi. TASMOTA, ESPeasy or ESPurna are the alternate firmwares for these.
Maybe worth a look
@Ranjib as Im not a programmer, as everyone can see by now, Im a much better hardware guy, but I was going to build a "controller" with a combo of these that would have been similar to a reef pi power controller plus temp controller.
If its feasible and easily integrated its one brand and available globally and they are not very expensive at all.