BA111 TDS Water Quality Sensor Module

The current version 1.0V
test code has been uploaded as an attachment. Please leave a message at the bottom if you have any questions.
Open source code link: https://gitee.com/yan_cxiot/ba111-tds-module
Video address: 【I made a low-cost TDS sensor detection module for less than 8 yuan - Open source learning】
1.0 Update Log:

Modified NTC silkscreen markings. Project Introduction :
Based on BitAtom's BA111 TDS water quality sensor module.
A dedicated chip suitable for total dissolved solids (TDS) and water temperature detection, integrating a high-precision oscillation circuit, analog-to-digital conversion circuit, and floating-point arithmetic unit. Employing a patented conductivity-TDS conversion algorithm and temperature correction algorithm, it quickly detects water TDS and achieves automatic temperature correction over a wide temperature range, reducing measurement errors caused by TDS value changes with temperature. Suitable for domestic water quality detection.


Project Functions:


BA111 single-channel TDS water quality sensor.


The sensor uses BitAtom's BA01 NTC-free temperature sensor.


Power supply uses DC 3.3V input.


XH 2.54-inch interface, with the interface silkscreened on the bottom.


M3 mounting holes are provided for easy installation.


Software Description:
Most of the software code is provided in the attachment. Currently, the basic test code is tentatively uploaded.


[ ] indicates incomplete


[x] indicates completed and uploaded attached












code. Progress:

[x] Measurement Code Test
[x] Return to Judgment Test

Physical Display Instructions
Precautions
1. When soldering, please pay attention to the soldering sequence to ensure the power supply is correct and to avoid burning out subsequent circuits! The soldering sequence should follow the principle of from shortest to smallest, and from inside to outside.
2. Data calibration: Follow the steps in the official manual and select the appropriate NTC resistor according to your needs.