RC Submarine 5.0 – electronics and wiring (7/10)

Next, we install the electronics and connect the wires. Computer For the computer, I’ve chosen the Arduino Nano ESP32 microcontroller.https://partco.fi/tuote/arduino-nano-esp32-without-headers-abx00092-2440 The board is quite small (18×45 mm) and will fit into the submarine nicely. It has a dual-core 240 MHz processor, 512 KB of RAM and 16 MB of flash. In terms of processing power, it is more than capable. However, the 16 MB of flash isn’t very much for storing log files, so we will need to restrict the sampling rate later in the code. One important feature is WLAN, which will make testing and development a lot easier, as we can update the software without having to open the submarine and plug in a USB cable. Arduino Nano ESP32 pinout. Connections we need: GND VIN: acceptable input voltage is 6-21 V, connect to the battery box A4, A5: I2C data bus for the pressure sensor and IMU sensor A2: GPIO input for the radio PPM sum signal A0,A1,A6,A7: GPIO outputs to power the radio and I2C…