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tatobari / hx711py

HX711 Python Library for Raspberry Pi.
Apache License 2.0
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changing the hx.set_reference_unit() value in example.py doesn't do anything #18

Closed drapizaaldryx closed 5 years ago

drapizaaldryx commented 5 years ago

I'm working with a 3kg load cell and when I run example.py with hx.set_reference_unit(1) it outputs:

55372
55334
55426
55433
55350
55411
55342
55459
55441
55514
55469
55432
55462
55399

adding 2kg to the load cell changes the output to:

1347015
1347079
1347217
1347085
1347154
1347143
1347165
1347071
1347179
1347080
1347089
1347133
1347182
1346994
1347174
1347168
1347150
1347136
1347186
1347048
1347081
1347139
1347240

i used hx.set_reference_unit(673) since 1347126 / 2000 = 673 but the output does not change after running please help :(

Takrem1 commented 5 years ago

I have the same problem. The values don't change when chaning the reference_unit.

tatobari commented 5 years ago

A major refactoring was just merged. Could you pull the changes and test again? Thanks.

Also, please post your test code.

Takrem1 commented 5 years ago

i did

with a reference_unit = 1 I got:

-31422
-31384
-31430
-31389
-59393
-31356
-31453
-31389
-31483
-31436
-31376
-31413
-31406
-31436
-31414
-31404

and with reference_unit=92 or any other number:

-31428
-31387
-31373
-31353
-31350
-31430
-31414
-31385
-31417
-31376
-31406
tatobari commented 5 years ago

@Takrem1 Could you post your code, please? Thanks!

Takrem1 commented 5 years ago

i used the example.py

tatobari commented 5 years ago

I'll update README.md and example.py this weekend to make it clearer.

Meanwhile, in example.py your getting the raw value from HX711 using hx.read_long(). Comment that one and uncomment hx.get_weight(5).

So, change this:

# Prints the weight. Comment if you're debbuging the MSB and LSB issue.
# val = hx.get_weight(5)
val = hx.read_long()
print val

To this:

# Prints the weight. Comment if you're debbuging the MSB and LSB issue.
val = hx.get_weight(5)
# val = hx.read_long()
print val
rirons commented 5 years ago

Same issue. I'm for sure registering changes through the load cell with example.py however these values are still just erroneous long numbers because the set reference unit is having apparently no effect whatsoever upon the output?

tatobari commented 5 years ago

Hey @rirons, are you using example.py? Did you modify any lines?

rirons commented 5 years ago

Using example.py. Other than the reference unit everything is as downloaded

Hey @rirons https://github.com/rirons , are you using example.py? Did you modify any lines?

tatobari commented 5 years ago

Please, read my comment just above your first one on this thread.