HX711 | Arduino library for HX711 24 bit ADC used for load cells
kandi X-RAY | HX711 Summary
kandi X-RAY | HX711 Summary
This HX711 library has an interface which is a superset of a library made by bogde. Some missing functions were added to get more info from the lib. Another important difference is that this library uses floats. The 23 bits mantisse of the IEE754 float matches the 24 bit ADC very well. Furthermore it gave a smaller footprint.
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QUESTION
I am trying to read in data from a load sensor using a raspberry pi. I can successfully get the data from the python file but when I try and pass it to a html file using flask it wont update the data correctly. it acts like its not getting current data just loading the same data over and over.
*SEE BOTTOM FOR UPDATE
here is my main.py file -
...ANSWER
Answered 2020-Jun-12 at 03:10Your python code return the entire page of index.html upon receiving each request from the browser, what you should do is instead of return render_template('index.html', **templateData), you only return the data with something like return jsonify(templateData), 200. In order to do this, create a separate route for handling the request.
QUESTION
I'm using Spring (boot) data 2.2.7 with mongodb 4.0. I've set 3 collections that I'm trying to join via an aggregation lookup operation.
- catalog
- stock
- operations
catalog
...ANSWER
Answered 2020-May-22 at 22:31The problem resides in the mismatch of types between productId and_id as you have observed.
To join such data, we need to perform uncorrelated sub-queries and not every "new" feature makes it immediately into abstraction layers such as spring-mongo.
Try this:
QUESTION
I have one 20kg Electronic load cell sensor to measure the weight in my project. To convert the load cell value to human readable format I have used the HX711 module which converts the value and gives to my ESP32 module. The problem is up to 900gms it gives proper weight but when we put more weight it gives random long negative values(e.g -806235). I don't know why this happen even load cell capacity is to measure weight up to 20kg.
I have included the HX711 library in my code with ESP32. Link is: https://github.com/bogde/HX711
...ANSWER
Answered 2019-Aug-19 at 10:43Yeppee..!! I solved the error. There is a little change in the library of HX711. Change in shiftIn function as shown below:
QUESTION
The Matlab script which I wrote is going to be used as a feedback for my control system. I have downloaded a library done called "Custom Arduino Library for HX711" by Nicholas Giacoboni.
I want to convert a Matlab script which I wrote Matlab script. I have also tested the script by itself and it works.
HX711 is a load cell amplifier ADC converter.
ANSWER
Answered 2018-Oct-26 at 17:11At a minimum you need to define the size of data at the top of the file. The parser has no idea of what read_HX711 returns and hence cannot allocate memory for data. You probably need to do the same for a and LoadCell.
That is, you need something like,
QUESTION
I'm trying to make an IoT scale using HX711 technical with a cell and a particle photon.
When flashing the code to Photon I receive an error in the library:
...ANSWER
Answered 2018-Nov-09 at 18:39There is a HX711 library for Particle devices maintained by the community: HX711ADC.
You can use it in the Web IDE, CLI or the Desktop IDE.
QUESTION
I use a load-cell bar, an HX711 amplifier, and raspberry pi3. I'm trying to make an application with more than one window in c # uwp using the library here https://github.com/ms-iot/hx711 But every time I go back to the page where I read the values transmitted by the HX711 amplifier I am getting this error:
Exception thrown: 'System.IO.FileLoadException' in Microsoft.Maker.Devices.Hx711.winmd WinRT information: Pin 'is currently opened in an incompatible sharing mode. Make sure this pin is not already in use by this application or other application.
I know this error is due to the fact that the pins were opened in a previous instance. What I do not know is how to check if they are open, and if they are open I will close them, or else to help me in continuing the application.
Below is the page where I need to read the values:
...ANSWER
Answered 2018-Jul-25 at 03:22Firstly,you should check if the connection to one of your pins tries to build twice. Secondly, you can try to add following method in the HX711 library, and then call this method when leaving current window.
QUESTION
I'm trying to make a "home weight" with my ESP32 and display the value using IBMCloud, however I'm running into some issues with the Arduino IDE and my code.
I get this error:
Arduino:1.8.5 (Windows 10), Tarjeta:"ESP32 Dev Module, QIO, 80MHz, 4MB (32Mb), 921600, None"
C:\Users\XX\Documents\Arduino\IBM_Watson_Connect\IBM_Watson_Connect.ino:8:25: fatal error: ESP8266WiFi.h: No such file or directory
compilation terminated.
exit status 1 Compiling error for the ESP32 Dev Module card.
I'm using a ESP32 dev board. My code is this:
...ANSWER
Answered 2018-Jul-05 at 14:08You're building a program for the ESP32, not the ESP8266. There are a lot of similarities but they're entirely different chips with different software.
So you don't use ESP8266WiFi.h with the ESP32. On the ESP32, the header file is just called WiFi.h (keeping more in line with WiFi support on Arduinos - the ESP32 Arduino Core is intended to be more compatible with the normal Arduino Core than the ESP8266 version was).
You need to
QUESTION
I am attempting to stream output from a weighing scale that is written in python. This program (scale.py) runs continuously and prints the raw value every half second.
...ANSWER
Answered 2018-Apr-20 at 18:23By default, all C programs (CPython included as it is written in C) that use libc will automatically buffer console output when it is connected to a pipe.
One solution is to flush the output buffer every time you need:
QUESTION
I don't know if his is the correct topic to ask this but here it goes:
I have a NodeMCU devkit 0.9 and I'm am able to use ESPlorer to upload basic code like the web server with some buttons that turn on and off LEDs on the board.
I was trying to interface NodeMCU with a load cell amplifier (HX711), which I saw has libraries for NodeMCU. How can I "include" hx711.c in my .lua file for it to recognize the functions inside hx711.c?
The error that appears when I try to send to ESP is
LUA interpreter error detected stdin:1: attempt to index global 'hx711' (a nil value)..."
Best regards.
...ANSWER
Answered 2017-Mar-31 at 15:00You need to build a NodeMCU firmware that includes the HX711 module. Then you need to flash the new firmware to your devkit.
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