I recently bought and installed a sensor from Lechacal.com, using the command line :
$ cat /dev/ttyAMA0
the line is supposed to generate readings of an induced A/C connection with the use of a current amplifier. But I keep getting fluctuating readings from the sensor even without connection of the current amplifier, not to mention connecting the current amplifier does not help in any way, as the readings generated constantly fluctuate in a way that indication of whether the sensor is working or not, can't be told.
Does anybody have any idea how this thing works?