Parabolic antenna / battery case for Wemos D1 water temp sensor

Parabolic antenna / battery case for Wemos D1 mini + DS18B20 with anker® astro3e 10000mah powerbank (what I had lying around) outdoor lake temperature sensor, sends the data to emoncms.org once in 30min and goes to deep sleep between.

Without this case I had very poor connection to my wlan (which is located ~100m from the sensor) and after, none of the sent packages has been lost, so works quite well - for me at least.

Parabolic shape has been taped with aluminium tape. Glued together with