NodeMCU + HX711 + Load Cell

Other Hardware 3rd Party Boards
1

Hello everyone, everything good?

I need some help;

At one time I got a load cell of 5kg + hx711 + nodemcu and it worked with some variations, but so far so good.

So I decided to pick up a load cell with a larger capacity (200kg), but it is not working, follow the attachment 1 the load cell on hx711.

https://forum.arduino.cc/index.php?action=dlattach;topic=547405.0;attach=257728

and in the nodemcu I connected the DT on port D6 (GPIO 12) and SCK on port D7 (GPIO 13), as attachment 2;

https://forum.arduino.cc/index.php?action=dlattach;topic=547405.0;attach=257730

Could someone give me a light on this?

OBS: I have 3 of those of 200kg, none of them are working.

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2

Did you connect the load cell according to it's datasheet.
Not all load cells use the same colour scheme.

Measure Excitation voltage with a DMM between E-(ground) and E+
The voltages on A- and A+ should be exactly half of the voltage on E+
Voltage between A- and A- should be about zero (< 20mV).

Did you use a special HX711 board for a 3.3volt Arduino.
It should have separate VDD (3.3volt) and VCC (5volt) supplies.

If not, the excitation voltage is less than the designed ~4.25volt, and the weight/result becomes unstable.
Leo..