2. Install the main control board

Before installation, use the serial port module to program firmware for esp32. The 3.3V, GND, RXD, and TXD of the serial port module are connected to 3, G, T, and R respectively.

Put three 2*6*0.5 red meson insulation gaskets on the screws between the bottom PCB and the main control board.

The PCB on the back of the e28 module is hollowed out, and a 1mm silicone grease sheet or toothpaste is applied to allow heat to transfer to the heat sink, and a layer of high-temperature tape is applied for insulation.

The pins used to connect the main control board and the power supply board are 2.54mm round pin headers.

The remote control nano adapter cable is connected to S, V, T, and R as shown in the figure. The green one is not connected to GND (the PCB has been updated, and the pad here is now an empty pad).

Fixed with four M2*8 nylon studs.

Pay attention to changing the e28 module antenna transfer resistor to the ipex socket and then connecting the external antenna.

3. Install the power supply board

For the TPS63020 module, open the short-contact point for voltage selection, and connect a 30K resistor in series here to adjust the output voltage to 3.45V. After making the change, test whether the voltage is normal. Solder it to the PCB with copper wire.

VIN is connected to the battery, and VOU is connected to the power supply line of the remote control.

Both sides of the board are insulated with high-temperature tape just in case.

Finally install the M2*4 screws.

After installation, the internal thickness is 13mm.

The tlite single-protocol radio frequency module can be retained, and the FPC antenna is attached to the inside. The multi-protocol radio frequency module is relatively thick and I am not sure whether it can be retained.