0.1.0 DCT532

Author: RobTillaart

libraries/DCT532/.arduino-ci.yml

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+platforms:
+  rpipico:
+    board: rp2040:rp2040:rpipico
+    package: rp2040:rp2040
+    gcc:
+      features:
+      defines:
+        - ARDUINO_ARCH_RP2040
+      warnings:
+      flags:
+
+packages:
+  rp2040:rp2040:
+    url: https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json
+
+compile:
+  # Choosing to run compilation tests on 2 different Arduino platforms
+  platforms:
+    - uno
+    # - due
+    # - zero
+    # - leonardo
+    - m4
+    - esp32
+    - esp8266
+    # - mega2560
+    - rpipico
+
+  libraries:
+    - "printHelpers"

libraries/DCT532/.github/FUNDING.yml

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+# These are supported funding model platforms
+
+github: RobTillaart
+custom: "https://www.paypal.me/robtillaart"

libraries/DCT532/.github/workflows/arduino-lint.yml

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+name: Arduino-lint
+
+on: [push, pull_request]
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@v5
+      - uses: arduino/arduino-lint-action@v2
+        with:
+          library-manager: update
+          compliance: strict

libraries/DCT532/.github/workflows/arduino_test_runner.yml

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+name: Arduino CI
+
+on: [push, pull_request]
+
+jobs:
+  runTest:
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+
+    steps:
+      - uses: actions/checkout@v5
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 2.6
+      - run: |
+          gem install arduino_ci
+          arduino_ci.rb

libraries/DCT532/.github/workflows/jsoncheck.yml

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+name: JSON check
+
+on:
+  push:
+    paths:
+      - '**.json'
+  pull_request:
+    paths:
+      - '**.json'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@v5
+      - name: json-syntax-check
+        uses: limitusus/json-syntax-check@v2
+        with:
+          pattern: "\\.json$"

libraries/DCT532/CHANGELOG.md

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+# Change Log DCT532
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## [0.1.0] - 2025-09-23
+- extend and publish
+
+## [0.1.0] - 2025-06-03
+- initial version
+
+
+

libraries/DCT532/DCT532.cpp

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+//
+//    FILE: DCT532.cpp
+//  AUTHOR: Rob Tillaart
+//    DATE: 2025-06-03
+// VERSION: 0.1.0
+// PURPOSE: Arduino library for DCT532
+//     URL: https://github.com/RobTillaart/DCT532
+
+
+
+#include "DCT532.h"
+
+
+DCT532::DCT532(uint8_t address, TwoWire *wire)
+{
+  _address = address;
+  _wire = wire;
+  _error = DCT532_OK;
+  _lastRead = 0;
+  _pressure = 0;
+  _temperature = 0;
+  P = 0;
+  T = 0;
+}
+
+
+bool DCT532::begin(float maxPressure, float minPressure)
+{
+  //  reset variables
+  _error = DCT532_OK;
+  _lastRead = 0;
+  _pressure = 0;
+  _temperature = 0;
+  P = 0;
+  T = 0;
+  _minPressure = minPressure;
+  _maxPressure = maxPressure;
+
+  if (! isConnected())
+  {
+    return false;
+  }
+  return true;
+}
+
+
+bool DCT532::isConnected()
+{
+  _wire->beginTransmission(_address);
+  return (_wire->endTransmission() == 0);
+}
+
+
+uint8_t DCT532::getAddress()
+{
+  return _address;
+}
+
+
+/////////////////////////////////////////////
+//
+//  READ SENSOR
+//
+int DCT532::readSensor()
+{
+  if (_wire->requestFrom(_address, (uint8_t)4) != 4)
+  {
+    _error = DCT532_REQUEST_ERROR;
+    return _error;
+  }
+  _lastRead = millis();
+
+  //  read the raw pressure
+  P = _wire->read() << 8;
+  P |= _wire->read();
+  P &= 0x3FFF;  //  mask unused bits.
+  //  read the raw temperature.
+  T = _wire->read() << 8;
+  T |= _wire->read();
+
+  //  raw convert to float pressure
+  //  (P - 1638)/13106 * (Pmax - Pmin) - Pmin
+  _pressure = ((P - 1638) * (_maxPressure - _minPressure));
+  _pressure *= 7.630093e-5;  //  MUL faster than DIV
+  _pressure -= _minPressure;
+
+  //  raw convert to float temperature
+  //  ((T >> 5)/2048) * 165 - 40
+  //  >> 5 = 1/32 = 0.03125
+  //  1 / 2048 = 4.8828125e-4
+  _temperature = T * (0.03125 * 4.8828125e-4 * 165.0) - 40.0;
+  _error = DCT532_OK;
+  return _error;
+}
+
+
+float DCT532::getPressure()
+{
+  return _pressure;
+}
+
+
+float DCT532::getTemperature()
+{
+  return _temperature;
+}
+
+
+uint32_t DCT532::lastRead()
+{
+  return _lastRead;
+}
+
+
+/////////////////////////////////////////////
+//
+//  DEBUG
+//
+int DCT532::getLastError()
+{
+  int e = _error;
+  _error = 0;
+  return e;
+}
+
+
+///////////////////////////////////////////////
+//
+//  PRIVATE
+//
+
+
+//  -- END OF FILE --
+

libraries/DCT532/DCT532.h

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+#pragma once
+//
+//    FILE: DCT532.h
+//  AUTHOR: Rob Tillaart
+//    DATE: 2025-06-03
+// VERSION: 0.1.0
+// PURPOSE: Arduino library for
+//     URL: https://github.com/RobTillaart/DCT532
+//          https://forum.arduino.cc/t/i2c-industrial-pressure-sensor-dct-532-with-arduino-uno-advice-required/1385075/11
+//
+//  TODO: need HW to develop /test
+
+
+#include "Arduino.h"
+#include "Wire.h"
+
+
+#define DCT532_LIB_VERSION         (F("0.1.0"))
+
+
+//  ERROR CODES
+//  values <> 0 are errors.
+#define DCT532_OK                   0
+#define DCT532_REQUEST_ERROR       -1
+
+
+
+class DCT532
+{
+public:
+  DCT532(uint8_t address, TwoWire *wire = &Wire);
+
+  bool     begin(float maxPressure, float minPressure = 0);
+  bool     isConnected();
+  uint8_t  getAddress();
+
+  //       READ
+  int      readSensor();      //  returns status
+  float    getPressure();     //  Bar
+  float    getTemperature();  //  Celsius
+  uint32_t lastRead();
+
+  //  DEBUG
+  int      getLastError();
+
+private:
+  uint8_t  _address = 0x2A;
+  TwoWire* _wire;
+
+  uint32_t _lastRead;
+  float    _pressure;
+  float    _temperature;
+  //  RAW data for develop,
+  //  TODO remove after confirmed working/
+  uint16_t P;
+  uint16_t T;
+
+  //  calibrate sensor type.
+  float    _minPressure;
+  float    _maxPressure;
+
+  uint8_t  _error;
+};
+
+
+//  -- END OF FILE --
+
+
+
+
+

libraries/DCT532/LICENSE

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+MIT License
+
+Copyright (c) 2025-2025 Rob Tillaart
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.