Esp8266 - 12 logger for measure temperatures and ADC values. Also it check wifi strength and number of possible wifies outside. I use 3 themometers, one is inside box (Tbox), where electronics is, second outside in dark (Tout), third on sun (Tsun).
Sigfox MKR1200 LPWAN sensor Node with DHT22 for testing purpose. This channel holds only raw sensor data + status data from Network. For human readable values see: https://thingspeak.com/channels/277898 Update: 20170712 Sensor has a new location