Load-Cell Amplifier HX711 With Qwiic: no data over i2c!

TECHNICAL SUPPORT Sensors & Modules
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1

Hi, i connected everything according to the example easyCExample.ino from your library
but im only getting 0 values, see below
im using a waveshare ESP32-P4-WIFI6-POE-ETH it happen to have an easyC/QWIIC port
only VCC and GND are reversed for some reason, but i checked the docu, also wire library detects the i2c device at 0x30, so in general it should be working.
I triple checked wirering and also checked the load-cell itself on an other HX711 board (without i2c) and its working.
An other ESP32 Nodemcu is also no bueno, only thing i couldnt test yetis with an older Arduino UNO, but i dont see why that should make a difference. Im mostly using ESP32 with i2c and havnt got much trouble with it…

Any idea what could be wrong ?

Best
Helmar

ESP-ROM:esp32p4-eco2-20240710
Build:Jul 10 2024
rst:0x1 (POWERON),boot:0x30f (SPI_FAST_FLASH_BOOT)
SPI mode:DIO, clock div:1
load:0x4ff33ce0,len:0x1174
load:0x4ff29ed0,len:0xccc
load:0x4ff2cbd0,len:0x34fc
entry 0x4ff29ed0
HX711 Reading: 0
HX711 Reading: 0
HX711 Reading: 0

2

Hello helmar,
Thank you for bringing this to our attention. We have come to the conclusion that the latest HX711 Qwiic batch was sent with the wrong firmware flashed to it. We are very sorry for the inconvenience.
There is a way to reprogram the chip using the accessible UPDI pins on the breakout itself, this requires an UPDI programmer such as an Atmel ICE device or with using a microcontroller as a jtag2UPDI device: GitHub - ElTangas/jtag2updi: UPDI programmer software for Arduino (targets Tiny AVR-0/1/2, Mega AVR-0 and AVR-DA/DB MCUs) · GitHub
This does require some soldering work.

You are of course eligible for a replacement, please contact us via our email hello@soldered.com with your order number and either a link to this forum thread or explaining the issue.

Best regards,
Josip Šimun Kuči