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For example, if you’re powering the board with ~12V, the + pin of these pads will provide ~12V. Protected Voltage: These header pads can be used to provide input voltage that has been reverse polarity and surge protected. USB: This is your standard USB Micro B connector. There is also an unpopulated Qwiic-compatible JST SH footprint next to the 2.54 mm header. #Using nmea 2000 network in overland vehicles driverA female header accepts many popular inexpensive OLED display modules using the SSD1306 driver as is. I2C header: Four-pin header for connecting I2C slave devices to the SH-ESP32. The 1-Wire data in pin (labeled “DQ” on the board is connected to GPIO 4, so in your program, use GPIO 4 as your 1-Wire input pin.) No other circuitry is required for connecting 1-Wire devices to the SH-ESP32. ġ-Wire header: 1-Wire interface fitted with ESD protection and noise filtering as well as low-pass filtering required for longer networks.The labels for these four pins are a bit “north” on the board: GND, Vext, IN, and OUT. Optocoupler I/O header: Optocoupler input and output can be provided via this interface. ĬAN bus connector: A 4-pin JST XH connector designed to be connected to a standard NMEA 2000 compatible DeviceNet M12 connector on the enclosure.A 2.5 mm terminal block can be fitted on the same footprint. Power connector: A JST XH compatible power connector. The picture below illustrates the different connectors on the SH-ESP32. The red LED is hard-wired to the 3.3V power, indicating that the device is powered, while the blue LED is connected to GPIO2 and can be controlled by the program. The boot button can be used to force the ESP32 into a flashing mode, and otherwise is usable as a generic button input on GPIO0. User interface: There are two buttons and two leds integrated on the board. #Using nmea 2000 network in overland vehicles serialThe USB interface can be used for powering the board, flashing the ESP32 module, and for communicating with the device using a serial protocol. When connected to a host computer, the board is visible as a USB serial device. USB interface: SH-ESP32 has a USB 2.0 compatible Micro B connector and interface. Both interfaces are ESD protected and have noise filtering. Additionally, there is an unpopulated footprint for a Qwiic compatible JST SH connector. ![]() I2C and 1-Wire I/O: SH-ESP32 supports 1-Wire and I2C on separate 2.54 mm headers. Optocoupler input and output: Optocoupler I/O can be used to connect the SH-ESP32 safely to noisy external inputs or outputs such as the alternator signal or relays. The CAN bus circuitry also includes protection similar to the main power supply and a 5V linear regulator to power the transceiver independently from the NMEA 2000 bus.
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