If you use the Arduino IDE to program the ESP32, you might be interested in [Andreas Spiess’] latest video (see below). In it, he shows an example of using all three ESP32 UARTs from an Arduino ...

Designed by Namnam in Vietnam, the ESP32 Modbus gateway is built to communicate with PLCs and industrial sensors over Modbus ...

Even if you don’t need a camera, the price is low enough and you get some interesting benefits like the increased range. If you want to put an ESP32-Cam on wheels, check this robot out.