This Raspberry Pi interface HAT is using several GPIO pins and an I²C device with a fixed address.

To ensure that this device will work for your system, make sure that these do not clash with GPIO and I²C devices that are already in use.

Used GPIO pins

PurposeDirectionGPIO header pin no.BCM GPIO no.WiringPi no.
Digital outputsOUTPUT7,29,31,36,11,124-6, 16-187,21,22,27,0,1
Digital inputsINPUT15,16,18,22,37,1322-273,4,5,6,25,2
Analog convert alertINPUT26711

Used I²C addresses

4x Analog input0x48ADS1115


The Raspberry Pi 12-24V interface HAT is equipped with a 40p header, which means that you can place this on top of your Raspberry Pi.

After having added the interface HAT you can enable the ADS1115 analog inputs in the config file (/boot/config.txt) by adding the following under the [all] section


For more information refer to

Make sure you have enabled the I2C interface on your Raspberry using raspi-config (see for more information).

After a reboot, you will find the device file entries in the folder /sys/bus/i2c/devices under a newly created folder for the ADS1115 device. For example, a folder named 1-0048 in which you will find a file called ‘name’. Check the contents of this file (using cat name) to make sure it is related to the ADS1115.


No specific drivers are required for this HAT as uses the standard GPIO pins.

When not using the ADS1115 as described above, please use either standard python libraries to read the analog inputs or standard I²C drivers.