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Description

The screw terminal breakout daughterboard breaks the pins on the back of the WiPhone out to screw terminals.

Features

  • Screw terminal access to WiPhone and SX1509 GPIOs.
  • Screw terminal access to WiPhone battery.
  • Screw terminal access to 5V power from USB connector.
  • Screw terminal access to 3.3V power from WiPhone.

Technical Details

Screw Terminals

  • Screw Terminals with 3.5mm pitch pins.
  • Side-entry terminal blocks
  • Voltage rating (UL/IEC): 125/130 V
  • Current rating (UL/IEC): 10/10 A
  • Contact resistance: 20 mΩ
  • Wire gauge: 24-18 AWG
  • Wire strip length: 5-6 mm
  • Screw: M2

The more general dimension diagram for an XX-pin version of this screw terminal block is shown below.

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Peripherals and GPIO

Peripheral Type Qty Input(I) / Output(O)
Digital 11 I/O
Digital 1 I
Analog (ADC) 5 I
UART 1 I/O
SPI 1 I/O
I2C 1 I/O
USB-UART 1 I/O
PWM 11 O

Note

All GPIOs are rated at 3.3VDC max. For more details please check ESP32 and SX1509 datasheet.

Pinout

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Pin Arduino Pin Description
5V   This pin is internally connected to the VBUS of USB port.
VBAT   This pin is internally connected to the positive terminal of the LiPo battery connector.
3.3V   This pin is connected to the dedicated on board voltage regulator for daughter board.
GND   This pin is connected to System GND.
DB_RXD 38 Connected to Mainboard RX.Can be used as DIGITAL INPUT PIN(GPI_38)
DB_TXD 32 Connected to Mainboard TX.Can be used as DIGITAL PIN(GPIO_32), ANALOG PIN (ADC1_CH4) and PWM PIN
DB_SPI_MISO 12 MISO for Daughter board SPI. Can be used as DIGITAL PIN(GPIO_12) ANALOG PIN (ADC2_CH5) and PWM PIN.
DB_SPI_MOSI 13 MOSI for Daughter board SPI. Can be used as DIGITAL PIN(GPIO_13), ANALOG PIN (ADC2_CH4) and PWM PIN.
DB_SPI_CLK 14 Clock for Daughter board SPI. Can be used as DIGITAL PIN(GPIO_14), ANALOG PIN (ADC2_CH6) and PWM .
DB_SPI_CS 27 CS for Daughter board SPI. Can be used as DIGITAL PIN(GPIO_27), ANALOG PIN (ADC2_CH7) and PWM PIN.
I2C_SCL 25 Clock pin for I2C (GPIO_25).Not recommended for any other function.
I2C_SDA 15 Data pin for I2C(GPIO_15).Not recommended for any other function.
D0-D5 EXTENDER_PIN(10) - EXTENDER_PIN(15) These pins are generic IO pins connected to SX1509 IO expander

Warning

  1. The default drive strength of the ESP32 digital output pin is ~10mA.
  2. The default drive strength GPIO Expander digital output pin is ~8mA. Please refer to ESP32 and SX1509 datasheets for further detail.

Note

For more detailed information about each pin please check WiPhone Technical Manual