bibhu223
commented
3 months ago Did you measure sensor volatge which is below 1mV I am facing the issue when I am connecting the sensor , my ref voltage is 5.08V and its single channel
Open gabriel-marques opened 1 year ago
bibhu223
commented
3 months ago Did you measure sensor volatge which is below 1mV I am facing the issue when I am connecting the sensor , my ref voltage is 5.08V and its single channel
Hello,
First of all thanks, for your library.
I've been using your module with this library on a RPI 3 and I achieved to use the ADC with a 3V3 reference. For that, I had first to change the reference value from 5.08V to 3.3V in the library and set in the Makefile Wiringpi instead of bcm3835 which was gaving me a segfault. Then, I had to remove the 0 Ohm resistor below the PCB which was connecting AVDD to 5V and connect 3V3 to the AVDD Input slot. But still, when reading values from a ADXL335 the average was around 3.2 V and the reason is that in the library, in function ADS1263_ConfigADC1 of file ADS1263.c the REG_MODE1 is set to 0x84 which modifies the filter selected but is ALSO modifies the sensor bias magnitude and this without specifying why.
I set it to 0 again and now I have great values but why is it set to 50-µA at first place ? If it's something necessary for the diff reading then set it only when needed and not by default.
Best regards