The SRF02 is a single transducer ultrasonic rangefinder in a small footprint PCB. This Devantech ultrasonic sonar ranging module has I2C and Serial interfaces with a range of 16 cm to 6 m (about 6 inches to 19 feet)
The SRF02 features both I2C and a Serial interfaces. The serial interface is a standard TTL level UART format at 9600 baud,1 start, 2 stop and no parity bits, and may be connected directly to the serial ports on any microcontroller. Up to 16 SRF02's may be connected together on a single bus, either I2C or Serial. New commands in the SRF02 include the ability to send an ultrasonic burst on its own without a reception cycle, and the ability to perform a reception cycle without the preceding burst. This has been as requested feature on our sonar's and the SRF02 is the first to see its implementation. Because the SRF02 uses a single transducer for both transmission and reception, the minimum range is higher than our other dual transducer rangers. The minimum measurement range is around 22cm (8.7 inches), like all our rangefinders, the SRF02 can measure in uS, cm or inches. Switch from measuring in centimeters or inches for ease of reading and data import.
Operating Modes
There are two operating modes for the SRF02. I2C mode and Serial Mode. This is set with the Mode pin, connected to 0v Ground for Serial Mode and left unconnected (or tied to +5v Vcc) for I2C Mode. These are documented on individual pages. For I2C Mode click here, and for Serial Mode click here.
Dimensions
- Standard I2C Bus or Serial Bus - connects up to 16 devices to a serial port
- Fully timed echo, freeing host controller of task.
- Range reported in uS, cm or inches.
- Incredibly light 4.6gm
- Power - 5v, 4mA Typ.
SRF02 USB
Beam Width
| Characteristics | ||
| Voltage | 5.0V | |
| Current | 4mA typical | |
| Frequency | 40kHz | |
| Minimum Range | 16cm | |
| Maximum Range | 6m | |
| Units | Range reported in µS, mm or inches | |
| Interface | I2C/Serial | |
| Size | 24 x 20 x 17mm (0.94 x 0.79 x 0.67 in.) |
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