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How do I connect two load cells?
To connect multiple load cells in parallel, use a watertight junction box, with a suitable terminal strip, or a multi-channel transmitter in the box. The cables in and out of the box or multi-channel transmitter require the installation of cable clamps.
How do you calibrate a load cell?
Steps to follow to calibrate your scale:
- Start by placing the scale in a stable platform and environment.
- Move to the calibration mode.
- You need to select a test value weight.
- Make sure that there are no items placed on the platform and even the bottom of the scale is not in contact with any object.
Can you use multiple hx711 objects in one sketch?
It’s good to hear someone recommend using multiple HX711 objects in one Sketch. @bneedhamia you mention adding two resistors to create a wheatstone bridge from those half-load cells. What tolerance resistors are you using? Your blog post mentions 0.7lb variance for approx 15lb weight in different locations.
Can you wire two separate pins for each hx711?
Can you try wiring two separate pins for each HX711. You don’t want to be clocking all 3 HX711 chips every time you read one, as it could lead to this kind of issue. I’m not sharing pins. each HX711 has is own . If I do a squale_power_up / down at each loop, the problem disappear. But it’s too slow.
Why is the hx711 running at 80Hz?
But as soon we use more, calling the ‘is_ready’ function becomes asynchronous. It is not clear in the datasheet, but the HX711 is free running at 80Hz. And if you activate CLOCK signal a few microseconds before the next end of conversion, you may just send the clock at the wrong time in the 10 microseconds time .
How to set up multiple amplifiers for multiple load cells?
If yes to #2, use the GPRS_TCPConnection example (or equivalent that came with the library for your shield), and manually change the URL there to yours.