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pico-ads1115

A C library for using Texas Instrument ADS1115 analog-to-digital converter with the Raspberry Pi Pico.

The ADS1115 is a 16-bit, 4 channel delta-sigma ADC. It is interfaced with I2C. Adafruit make a convenient ADC board with this chip (Adafruit product ID 1085).

Wiring

ADS1115 Pico
SDA SDA (e.g. pin 8)
SCL SCL (e.g. pin 9)
VDD 3V3(OUT)
GND GND

(Note that I2C interfacing requires pull-up resistors, but Adafruit's board already includes these.)

Software

  1. Configure CMakeLists.txt in your base project to include the path to the pico-ads1115 library. Add pico-ads1115 to the list of target libraries. E.g. if the pico-ads1115 library is located one directory above (../) the current one your CMakeLists.txt file should include
.
.
.
include(pico_sdk_import.cmake)
add_subdirectory(../pico-ads1115/lib ads1115)

target_link_libraries(touch
        pico_stdlib
        hardware_i2c
        pico-ads1115
)
.
.
.
  1. Use the library; see the examples directory.