IoTaaP - Pins

IoTaaP has various I/O pins that can be configured for different features, such as PWM, DAC, SPI, ADC, etc. Some pins have some special behaviours, so be sure to check the table below. Get more info about pin configuration at IoTaaP Embedded Standard page.

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PIN Input Output Notes
VSYS N/A N/A External power supply (5V MAX)
5VOUT N/A N/A 5Vout (1A MAX)
GND N/A N/A GND
3.3V N/A N/A 3.3Vout (300mA MAX)
RESET N/A N/A LOW level will reset module
P2 YES YES P2 or LED2
P4 YES YES P4
P12 YES* YES Boot will fail if HIGH
P13 YES YES P13
P14 YES YES Outputs PWM at boot
P15 YES YES Outputs PWM at boot. P15 or LED1
P16 YES YES P16
P17 YES YES P17
SCL (I2C) YES YES P22 (4k7 pull-up to 3.3V)
SDA (I2C) YES YES P21 (4k7 pull-up to 3.3V)
MISO (SPI) YES YES P19 with 100R resistor
MOSI (SPI) YES YES P23 with 100R resistor
CLK (SPI) YES YES P18 with 100R resistor
CS (SPI) YES YES P5 with 100R resistor. Outputs PWM at boot
TX (Serial) TX pin YES* Debug output at boot
RX (Serial) YES* RX pin HIGH at boot
P26 YES YES
P27 YES YES
P32 YES YES P32 or Buzzer
P33 YES YES P33
P34 YES NO P34
P35 YES NO P35
A3 YES NO Analog input