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May 13, 2014
about 3 years ago
I have connected this device to an Arduino Uno Rev3. It works perfectly. But when I disconnect from the USB port of my mac and connect again it displays a wrong value, something like -170.xx
I have connected to I2C also a RTC DS1307, and they work perfectly after loading the sketch. The sketch is based on the linked Arduino example, with minor modifications: I have kept the functions for bcd conversion, setDate, getDate, toggelOneSHot, readPressure, I2Cread/write, setModeBarometer, setOverSampleRate (set to 128).
set setup is:
// setup MPL3115A2
setModeBarometer(); // Measure pressure in Pascals from 20 to 110 kPa
setOversampleRate(128); // Set Oversample to the recommended 128
if(IIC_Read(WHO_AM_I) == 196)
display.println(“No response - check connections”);
display.display(); //update display
display.clearDisplay(); // delete old values
Any idea why when reconnecting it does not work, but no message “No response - check connections” ?
(BTW this message is correctly displayed if I disconnect either SLA or SDA pin).
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