2)And secondly, I recently discovered that the ADC seems to have to be used with “Wi-Fi&BT off” and I use it so is it a real issue? What are the consequences if I use Bluetooth? https://i.ibb.co/B4RbFs8/adc-wifi-bt.png (See https://www.espressif.com/sites/default/files/documentation/esp32_datasheet...

What have you tried so far that didn't work? Can you share a schematic? Looking at the datasheet: https://www.renesas.com/us/en/document/dst/x9c102-x9c103-x9c104-x9c503-datasheet The X9C102 has pins for CS, U/D, and INC, which will need to be connected to GPIO's of the ESP32. You may also need the R...

I believe he was asking, do you actually need an analog reading to precisely measure the voltage? Or are you simply looking for ON / OFF, i.e. a digital reading? If you only need a digital reading, you can use any GPIO pin. Approx 0-0.8V is logic low, 2.4-3.3V is logic high. So if your turn signal l...

The PICO is the smallest integrated solution.
Otherwise if you use the more "bare" mcu esp32 and external psram and flash, those two components are larger than the mcu itself.

Share your schematic.
Often suspect the power supply with wifi issues, it is the highest power draw function.

Missing bypass caps near the esp32, place 1uF and 100nF. 4V LDO MIC29302WU rated for 3A, should be more than enough. LN1134 LDO 5V to VCC 3.3V, rated 300mA is insufficient, esp32 recommends 500mA and higher is a safe bet go for something rated 600-1000mA. R16 is 470 Ohm from 4V to GND, seems like a ...

Are you powering with a usb cable, from the USB-A 5V out on the 18650 shield to the micro usb in on the t-camera? Or something different using the 5V or 3.3V pins on the 18650 shield? Do you have a scope to check the voltage during transients? wifi pulls a big current spike its likely dipping the vo...

The esp32 needs a signal on GPIO0 to enter firmware download mode, and a toggle on EN/RESET to reset it and enter download mode. The FT232R could not magically do that over the TX/RX lines. Sorry, your designer was mistaken. Take a page from the many esp32 dev boards, use that auto flash circuit. I ...

See this post for a similar request:
viewtopic.php?t=15342

There's no miso because the lcd doesn't send any data, it only receives data and displays. From your link: Note: It is not like the traditional SPI protocol, it only uses MOSI to send data from master to slave for the LCD display. For details please refer to Datasheet Page 105. Did you read the data...