ESP32 is the hottest new wireless chip out there, offering both WiFi and Bluetooth Low Energy radios rolled up with a dual-core 32-bit processor and packed with peripherals of every kind.

And for another, it has an optional 4G LTE module. I’m still not sure ... It has pretty barebones hardware including a 240 MHz ESP32 dual-core microprocessor, 8MB of PSRAM, and 16MB of flash ...

An ESP32 is the heart of the operation ... it comes to thick walls compared to higher-frequency technologies like 4G, 5G or WiFi. With a little coil antenna sticking out the top of the 3D-printed ...