The ESP32 with an operating range from -40°C up to 120°C this microcontroller is perfectly suited for all kinds of IOT enviroments.
ESP32 is a ultra low power consumpting device and can be used a slave to host a MCU or as a standalone solution.
It got built in Bluetooth, WiFi and antenna switches.
More informations can be found for e.g. on the Wikipediapage of the ESP32.