Hi everyone, I'm new to developing my own projects, and I'm currently building a smart cat toilet that uses 4x 4-wire stain gauges (20kg each) hooked up to an hx711, itself connected to an esp32. I'm essentially building this man's project, and following his instructions: https://makerworld.com/en/…

Please read this very related discussion. [image] 4x Load Cells Hx711, smart weight scale Sensors Hello everyone, I’m trying to build a digital scale that will upload data to a database so I can monitor the stock levels of a specific part over time. I’m using four 50kg lo…

If you read the pinned post re 'How to get the most from the forum' then you would know about posting code and wiring diagrams, NOT the instructions, but what you actually wired. I have built a scale with an HX711 and always wonder why people think using more than one strain gauge will help. Just u…

The maximum input voltage on any ESP GPIO pin is 3.3V, yet this guy has several 5V signals connected including the one from the HX711 You should never connect any signal greater than 3.3V to any ESP GPIO otherwise you risk damaging the ESP A schematic of you set-up would be nice.

[image] sonofcy: I have built a scale with an HX711 and always wonder why people think using more than one strain gauge will help. Just use one and follow one of the examples. There are very specific instructions on how to calibrate the gauge. Hint, a reading of 10lbs might be a strain gauge rea…

Dear Tesla, I know very well that the difference does not read in pounds. I have in fact calibrated the scale using code, and the problem is that no matter how many pounds (or kilos in my case) I place on the scale, there is no difference comapared to the noise in the system. So: values are always r…

According to the specs of the hx711, it should be powered between 2.6-5.5v. The esp32 can output 5v and 3.3v. I tried powering it with 3.3v and that did not work. 5v works fine. However, if you think it would help, I'll give it another shot. However... The thing is the following: the 5v is just to p…

and what I mean with 'it doesn't show raw counts': it really doesn't show appreciable differences. When I calibrate it and then put weights on the scale, the readings fluctuate from -10kg to +46kg, but it is all roughly around 3160-3170. So I DO have an output signal. Just not a stable one. Accordin…

#include <WiFi.h> #include <ArduinoOTA.h> #include <HX711.h> #include <EEPROM.h> // HX711 circuit wiring const int LOADCELL_DOUT_PIN = 4; // Changed from 2 to 4 const int LOADCELL_SCK_PIN = 5; // Changed from 3 to 5 // WiFi credentials const char* ssid = ""; const char* password = ""; // OTA s…

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pretty much the exact way I wired it to the esp32. The code I used -minus my wifi login credentials- is above.

4x 4-wire strain gauge and hx711 to esp32 issues

Other Hardware Sensors

robtillaart July 18, 2025, 1:06pm 2

Please read this very related discussion.

The only difference might be the load cells used...

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4x 4-wire strain gauge and hx711 to esp32 issues

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