EP-0076: Difference between revisions
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[[File:Ads1115.pdf]]<br> | [[File:Ads1115.pdf]]<br> | ||
==FAQ== | ==FAQ== |
Revision as of 12:04, 13 June 2019
RPI-ADS1115-ADC-Module
Description
The ADS1115 are precision analog-to-digital converters (ADCs) with 16 bits of resolution offered in an ultra-small, an MSOP-10 package.
Data are transferred via an I2C-compatible serial interface, four I2C slave addresses can be selected, it operate from a single power supply at 3.3V.
It can be used to detect analog signal and convert it to digital signal.
You can attach a joy stick or other analog sensor such as NTC,temperature, dust sensor and so on.
Compatibility List
- Compatibility
Platform | ADS1115-ADC Module | Notes |
---|---|---|
Raspberry Pi 3 Model B Plus | √ | |
Raspberry Pi zero | √ | |
Raspberry Pi zero W | √ | |
Raspberry Pi 3 Model B | √ | |
Raspberry Pi 2 Model B | √ | |
Raspberry Pi Model B+ | × |
Features
Parameters | Values |
---|---|
Size: | 65.0mm x 30.0mm x 18.0mm |
Power Supply | 3.3v |
Analog Input Voltage | GND to VDD |
PROGRAMMABLE DATA RATE: | 8SPS to 860SPS |
INTERNAL LOW-DRIFT: | VOLTAGE REFERENCE |
INTERNAL PGA | Available |
Resolution | 16-bit |
I2C™ INTERFACE: | Pin-Selectable Addresses |
Channels Number | 4 SINGLE-ENDED OR 2 DIFFERENTIAL INPUTS |
PROGRAMMABLE COMPARATOR | 2/3 ~ 16 |
INTERNAL NTC Support | Available |
Mechanical Drawing
Schematic Diagram
Gallery
How to wire up
Just Plug into GPIO with this module.
- NOTE: Please be ware of the No.1 Pin is fit for your GPIO No.1 Pin.
How to get analog data
- All steps are available that we've consumed that you have already flashed the newest image file into your TF card, and your RaspberryPi is powered on.
- Modify /boot/config.txt file and add those parameters to enable ADC module's driver:
sudo vim.tiny /boot/config.txt
dtparam=i2c_arm=on
Save it and reboot your raspberry Pi.
- Python code to use the ADS1015 and ADS1115 analog to digital converters with a Raspberry Pi or BeagleBone black.
- To install the library from source (recommended) run the following commands on a Raspberry Pi or other Debian-based OS system:
sudo apt-get install git build-essential python-dev cd ~ git clone https://github.com/adafruit/Adafruit_Python_ADS1x15.git cd Adafruit_Python_ADS1x15 sudo python setup.py install
- Alternatively you can install from pip with:
sudo pip install adafruit-ads1x15
- Change your work directory to Adafruit_Python_ADS1x15/example as following command:
cd ~/Adafruit_Python_ADS1x15/examples
sudo python simpletest.py
- You will see a chart like following picture:
- Do not panic when you see this picture:
- Remove the jumper from NTC_EN to AIN0, it will be back to normal.
Have fun!
Official Documents
- Datasheet:
FAQ
- Question: how to detect this module's address ?
- Answer: open a terminal and use this command :
- Answer: open a terminal and use this command :
i2cdetect -y 1
You will see the address of your ADS1115's address, by the way, you'd better enable i2c function first.