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Mini APM v3.1 Sonar rangefinder

I have a Mini APM v3.1 and a Maxbotic I2C EZ4 sonar module. Is it possible to get the sonar to work with this release or any earlier release of the firmware, or does it only work with an analogue sensor.

I have tried earlier releases of firmware. The following is what I get with 2.7b:-

In ‘Initial Setup’ ‘Rangefinder’, I see values for both Distance and Voltage, however, these don’t change with distance. It also says ‘None’ in the drop down box.

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