You want to write directly to ADCON1 so you have at least Fosc/8 for 4MHz.
ADCIN doesn't do this for you - so your AD conversion clock is way too fast with ADCON1 = 0 by default.
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Re: I2c, srf02, 16f688 -> ultrasonic rangefinder
You want to write directly to ADCON1 so you have at least Fosc/8 for 4MHz.
ADCIN doesn't do this for you - so your AD conversion clock is way too fast with ADCON1 = 0 by default.
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