How to read weight data from Avia HX711. I am using NRF52840DK board with NRF Connect SDK (2.6.1)

[Amudhan R]

I am developing a project in which a weight analog data is converted as digital by Aviva HX711.

In the host board NRF52840DK, I want to read the wight value.

I have attached the datasheet of the HX711 we are using.

2046.HX711.pdf

[Edvin]

Hello,

Please check page 4 in your datasheet. The section "Serial Interface", together with the figure "Fig.2" on page 5, and the unnamed table directly below "Fig.2"

It says that you can determine the gain of the output (weight cell, I assume) by using either 25, 26 or 27 pulses on the clock pin. Make sure that the clock pin is not high for too long, as this will cause it to go in power down mode. Maximum 50µs. 

I suggest you try this in an application without anything else first (no BLE). 

Since this is a proprietary serial protocol, you may need some extra things to make this work in parallel with BLE (if you plan to use BLE or some other radio protocol), but first you can familiarize yourself with the protocol. A logic analyzer on the data and clock pin may also be a helpful tool.

Best regards,

Edvin