Unlike most of the other temperature sensors we have, this breakout has a really cool IR sensor from TI that can measure the temperature of an object without touching it.
Pinouts
Power Pins
-
VCC - This is the positive power and logic level pin. It can be
2.2-5.5VDC, so fine for use with 3 or 5V logic. Power VCC with whatever
logic level you plan to use on the i2c lines.
- GND - this is the ground power and logic reference pin.
I2C Data Pins
- SCL - this is the I2C clock pin. There's a 10K pull-up already on the board, so connect this directly to the i2c master clock pin on your microcontroller
- SDA - this is the I2C data pin. There's a 10K pull-up already on the board, so connect this directly to the i2c master data pin on your microcontroller
Optional Pins
These are pins you don't need to connect to unless you want to!-
Alert - This is the interrupt/alert pin from the TMP007. The
chip has some capability to 'alert' you if the chip temperature goes
above or below a set amount. This output can trigger to let you know. We don't have library support for this pin, so check the datasheet for more information.
- AD0 AD1 - These are the address select pins. Since you can only have one device with a given address on an i2c bus, there must be a way to adjust the address if you want to put more than one TMP on a shared i2c bus. The AD0/AD1 pins set the bottom three pins of the i2c address. There are 10K pull-down resistors on the board.
Assembly
Prepare the header strip:
Cut the strip to length if necessary. It will be easier to solder if you insert it into a breadboard - long pins downAdd the breakout board:
Place the breakout board over the pins so that the short pins poke through the breakout padsAnd Solder!
Be sure to solder all pins for reliable electrical contact.(For tips on soldering, be sure to check out our Guide to Excellent Soldering)..
Arduino
-
Connect Vdd to the power supply, 3V or 5V is fine. Use the same
voltage that the microcontroller logic is based off of. For most
Arduinos, that is 5V
- Connect GND to common power/data ground
- Connect the SCL pin to the I2C clock SCL pin on your Arduino. On an UNO & '328 based Arduino, this is also known as A5, on a Mega it is also known as digital 21 and on a Leonardo/Micro, digital 3
- Connect the SDA pin to the I2C data SDA pin on your Arduino. On an UNO & '328 based Arduino, this is also known as A4, on a Mega it is also known as digital 20 and on a Leonardo/Micro, digital 2
Download Adafruit_TMP007
To begin reading sensor data, you will need to download the Adafruit TMP007 library from the Arduino library manager.
Open up the Arduino library manager:
Search for the Adafruit TMP007 library and install it
We also have a great tutorial on Arduino library installation at:
http://learn.adafruit.com/adafruit-all-about-arduino-libraries-install-use
Load Demo
Open up File->Examples->Adafruit_TMP007->tmp007 and upload to your Arduino wired up to the sensorThe TMP007 library is pretty straight forward! Start by creating the Adafruit_TMP007 object with:
Adafruit_TMP007 tmp007;
Adafruit_TMP007 tmp007(0x41); // start with a diferent i2c address!
tmp007.begin()
tmp007.begin(TMP007_CFG_1SAMPLE)
if (! tmp007.begin()) { Serial.println("No sensor found"); while (1); }
tmp007.readObjTempC(); tmp007.readDieTempC();
Then wait 4 seconds between readings to get a new reading!
delay(4000); // 4 seconds per reading for 16 samples per reading
Python & CircuitPython
It's easy to use the TMP007 sensor with Python or CircuitPython and the Adafruit CircuitPython TMP007 module. This module allows you to easily write Python code that reads the temperature from the sensor.
You can use this sensor with any CircuitPython microcontroller board or with a computer that has GPIO and Python thanks to Adafruit_Blinka, our CircuitPython-for-Python compatibility library.
CircuitPython Microcontroller Wiring
First wire up a TMP007 to your board exactly as shown in the previous pages for Arduino. Here's an example of wiring a Feather M0 to the sensor with I2C:
Python Computer Wiring
Since there's dozens of Linux computers/boards you can use we will show wiring for Raspberry Pi. For other platforms, please visit the guide for CircuitPython on Linux to see whether your platform is supported.
Here's the Raspberry Pi wired with I2C:
CircuitPython Installation of TMP007 Library
You'll need to install the Adafruit CircuitPython TMP007 library on your CircuitPython board.
First make sure you are running the latest version of Adafruit CircuitPython for your board.
Next you'll need to install the necessary libraries to use the hardware--carefully follow the steps to find and install these libraries from Adafruit's CircuitPython library bundle. Our Welcome to CircuitPython guide has a great page on how to install the library bundle.
For non-express boards like the Trinket M0 or Gemma M0, you'll need to manually install the necessary libraries from the bundle:
- adafruit_tmp007.mpy
- adafruit_bus_device
Before continuing make sure your board's lib folder or root filesystem has the adafruit_tmp007.mpy, and adafruit_bus_device files and folders copied over.
Next connect to the board's serial REPL so you are at the CircuitPython >>> prompt.
Python Installation of TMP007 Library
You'll need to install the Adafruit_Blinka library that provides the CircuitPython support in Python. This may also require enabling I2C on your platform and verifying you are running Python 3. Since each platform is a little different, and Linux changes often, please visit the CircuitPython on Linux guide to get your computer ready!
Once that's done, from your command line run the following command:
sudo pip3 install adafruit-circuitpython-tmp007
If your default Python is version 3 you may need to run 'pip' instead. Just make sure you aren't trying to use CircuitPython on Python 2.x, it isn't supported!
CircuitPython & Python Usage
To demonstrate the usage of the sensor we'll initialize it and read the die temperature and object temperature from the board's Python REPL.
First, run the following code to import the necessary modules and initialize the I2C connection with the sensor:
import board import busio import adafruit_tmp007 i2c = busio.I2C(board.SCL, board.SDA) sensor = adafruit_tmp007.TMP007(i2c)
Now you're ready to setup the sensor and read the values using these properties:
- die_temperature - reads sensor die temperature and return its value in degrees Celsius.
- temperature - reads the object temperature and returns it's value in degrees Celcius.
For example, to print the die temperature and object temperature:
print('Die temperature: {0:0.3F}*C'.format(sensor.die_temperature)) print('Object temperature: {0:0.3F}*C'.format(sensor.temperature))
# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries # SPDX-License-Identifier: MIT #!/usr/bin/python # Author: Adapted to CircuitPython by Jerry Needell # Adafruit_Python_TMP example by Tony DiCola # import time import board import busio import adafruit_tmp007 # Define a function to convert celsius to fahrenheit. def c_to_f(c): return c * 9.0 / 5.0 + 32.0 # Create library object using our Bus I2C port i2c = busio.I2C(board.SCL, board.SDA) sensor = adafruit_tmp007.TMP007(i2c) # Initialize communication with the sensor, using the default 16 samples per conversion. # This is the best accuracy but a little slower at reacting to changes. # The first sample will be meaningless while True: die_temp = sensor.die_temperature print( " Die temperature: {0:0.3F}*C / {1:0.3F}*F".format(die_temp, c_to_f(die_temp)) ) obj_temp = sensor.temperature print( "Object temperature: {0:0.3F}*C / {1:0.3F}*F".format(obj_temp, c_to_f(obj_temp)) ) time.sleep(5.0)
Downloads
Datasheets & Files
This guide was first published on Aug 05, 2014. It was last updated on Mar 28, 2024.