SKU: TH2058
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Adafruit TMP117 ±0.1°C High Accuracy I2C Temperature Sensor is a precision digital temperature sensing breakout designed for projects that need more than a rough ambient reading. Built around Texas Instruments' TMP117, it delivers 16-bit temperature measurements with 0.0078°C resolution and accuracy of up to ±0.1°C in the specified temperature range.
This board communicates over I2C and can do more than simply report temperature. It supports high and low temperature alerts, interrupt-driven monitoring, and is suitable for applications where reliable thermal tracking matters, such as thermostats, cold chain asset tracking, gas meters, and heat meters.
Adafruit has mounted the sensor on a breakout in the STEMMA QT form factor, so it is easy to integrate with breadboards as well as Qwiic/STEMMA QT ecosystems. It works with both 3.3V and 5V logic, making it a convenient choice for Raspberry Pi, Feathers, and many Arduino-compatible boards. Please note: QT cable is not included.
Technical details for the TMP117 breakout board.
| Brand | Adafruit |
|---|---|
| Sensor IC | TMP117 |
| Interface | I2C |
| Resolution | 16-bit / 0.0078°C |
| Operating Range | -55°C to 155°C |
| Accuracy | Up to ±0.1°C |
| Logic Compatibility | 3.3V and 5V compatible |
| Board Format | STEMMA QT / Qwiic-compatible breakout |
The board uses a standard 4-wire I2C connection and is designed for quick hookup through headers or STEMMA QT connectors.
| Connection | Name | Function |
|---|---|---|
| 1 | VIN / 3V | Power input from your host board |
| 2 | GND | Ground connection |
| 3 | SCL | I2C clock line |
| 4 | SDA | I2C data line |
Typical wiring is straightforward: connect board 3V or VIN to sensor power, GND to GND, SCL to SCL, and SDA to SDA. On STEMMA QT cables, the usual wire colors are red for power, black for ground, yellow for SCL, and blue for SDA.
The TMP117 also supports temperature alert functionality and interrupt-driven behavior for systems that need threshold monitoring without constant polling. Hardware support is required for NIST traceability.
It uses an I2C interface and is also described as SMBus-compatible in the TMP117 datasheet. The breakout is designed in Adafruit’s STEMMA QT form factor and also works with SparkFun Qwiic-compatible connectors.
The sensor offers 16-bit temperature readings with 0.0078°C resolution. Accuracy is up to ±0.1°C, with that maximum specified from -20°C to +50°C.
The TMP117 supports a wide operating temperature range from -55°C up to 155°C according to the product brief. The reference datasheet specifies device operation up to 150°C, with detailed accuracy bands across the range.
Yes, the board is described as compatible with 5V voltage levels commonly used on Arduino boards and with 3.3V logic used by boards such as Raspberry Pi and Adafruit Feather. The TMP117 itself supports a 1.7V to 5.5V supply range in the datasheet.
Yes, it supports programmable high and low temperature alerts, and interrupt support is specifically mentioned in the product information. This makes it useful for applications where you need a notification when temperature crosses a threshold.
No, the product brief notes that the QT cable is not included. The board has STEMMA QT / Qwiic-compatible connectors, but the cable needs to be arranged separately if required.
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