HX711
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Please be positive and constructive with your questions and comments.
- DrakeBB
- Posts: 21
- Joined: Thu Dec 05, 2024 1:06 pm
Re: HX711
Here are some pictures showing the connections on the hx711. A little blurry but shows what I was testing. I can send pictures of the voltmeter on the strain gage load cell if that's needed as well
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- mikeysklar
- Posts: 18071
- Joined: Mon Aug 01, 2016 8:10 pm
Re: HX711
Good work confirming the wiring. Also seeing some voltage readings on from the sensor.
I think this is going to come down to CircuitPython being finicky about pin names.
Instead of using D8 (SCK) and D7 (DATA) try the other names. Do not move the wires.
D8 can also be RX or A6
D7 can also be TX or A7
I think this is going to come down to CircuitPython being finicky about pin names.
Instead of using D8 (SCK) and D7 (DATA) try the other names. Do not move the wires.
D8 can also be RX or A6
D7 can also be TX or A7
- mikeysklar
- Posts: 18071
- Joined: Mon Aug 01, 2016 8:10 pm
Re: HX711
Thx for trying. The values being maxed out might be a
Which model are you using for the strain gauge load cell?
I'll order some parts and try to reproduce / resolve.
In the meantime are you comfortable trying with Arduino code? The behavior may change and it would help to know if this is CircuitPython specific.
Which model are you using for the strain gauge load cell?
I'll order some parts and try to reproduce / resolve.
In the meantime are you comfortable trying with Arduino code? The behavior may change and it would help to know if this is CircuitPython specific.
- mikeysklar
- Posts: 18071
- Joined: Mon Aug 01, 2016 8:10 pm
Re: HX711
I ordered some parts, but won't have them until mid next week.
The guide will walk you through Arduino setup and the example code is provided. If it is too much hassle don't sweat it. I'll be able to play along soon. I ordered a few different gauges to compare with as well.
The guide will walk you through Arduino setup and the example code is provided. If it is too much hassle don't sweat it. I'll be able to play along soon. I ordered a few different gauges to compare with as well.
- T_Mo
- Posts: 1423
- Joined: Thu Mar 15, 2018 7:10 pm
Re: HX711
If you have pushed the pins of the 0.1 inch header into the holes on the prototype breadboard, and you are connecting to it via jumpers with smaller diameter pins, you may be having unreliable connections between the controller board and the strain gauge breakout.
The contact rows on a protoboard do not much like having different sized wires connected to the same row of holes.
The contact rows on a protoboard do not much like having different sized wires connected to the same row of holes.
Last edited by T_Mo on Thu Jan 23, 2025 6:43 pm, edited 2 times in total.
- mikeysklar
- Posts: 18071
- Joined: Mon Aug 01, 2016 8:10 pm
Re: HX711
@DrakeBB - T_Mo brings up a good point about wiring. Although it did seem like you were getting readings off the terminal block that had reasonable voltage.
When you open the Arduino Serial Monitor what do you see?
When you open the Arduino Serial Monitor what do you see?
Please be positive and constructive with your questions and comments.