The SRF02 is a single transducer ultrasonic rangefinder in a small footprint PCB. It 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 15cm (6 inches). Like all SRF rangefinders, the SRF02 can measure in uS, cm or inches.
There are two operating modes for the SRF02. I2C mode and Serial Mode. Addition information is available at Devantech's website.
Pre-made cable with connector and pin headers that mates with this sensor is available here.
- Voltage: 5V only required
- Current: 4mA Typ.
- Frequency: 40KHz
- Range: 15cm to 6m
- Analogue Gain: Automatic 64 steps gain control
- Connection modes:
- Mode 1: Standard I2C Bus
- Mode 2: Serial Bus - Connect up to 16 devices to any microcontroller or UART serial port
- Timing: Fully timed echo, freeing host controller of task
- Measurement units: Range report in uS, mm or inches
Dimension: 24 x 20 x 17mm height
Weight: 4.6 grams