2024-10-1300 Start

.gitignore

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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

.vscode/extensions.json

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+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

include/README

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+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

lib/README

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+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

platformio.ini

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+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:lolin32]
+platform = espressif32
+board = lolin32
+framework = arduino
+monitor_speed=115200
+lib_deps =
+  # The exact version
+  adafruit/Adafruit MAX31865 library @ 1.6.2
+  adafruit/Adafruit Unified Sensor @ 1.1.14

src/main.cpp

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+#include <Arduino.h>
+#include <Wire.h>
+
+/*************************************************** 
+  This is a library for the Adafruit PT100/P1000 RTD Sensor w/MAX31865
+
+  Designed specifically to work with the Adafruit RTD Sensor
+  ----> https://www.adafruit.com/products/3328
+
+  This sensor uses SPI to communicate, 4 pins are required to  
+  interface
+  Adafruit invests time and resources providing this open source code, 
+  please support Adafruit and open-source hardware by purchasing 
+  products from Adafruit!
+
+  Written by Limor Fried/Ladyada for Adafruit Industries.  
+  BSD license, all text above must be included in any redistribution
+ ****************************************************/
+
+#include <Adafruit_MAX31865.h>
+
+// Use software SPI: CS, DI, DO, CLK
+Adafruit_MAX31865 thermo = Adafruit_MAX31865(5, 23, 19, 18);
+//Adafruit_MAX31865 thermo = Adafruit_MAX31865(10, 11, 12, 13);
+//Adafruit_MAX31865 max = Adafruit_MAX31865(5, 23, 19, 18);
+// use hardware SPI, just pass in the CS pin
+//Adafruit_MAX31865 thermo = Adafruit_MAX31865(10);
+
+// The value of the Rref resistor. Use 430.0 for PT100 and 4300.0 for PT1000
+#define RREF      430.0
+// The 'nominal' 0-degrees-C resistance of the sensor
+// 100.0 for PT100, 1000.0 for PT1000
+#define RNOMINAL  100.0
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println("Adafruit MAX31865 PT100 Sensor Test!");
+
+  thermo.begin(MAX31865_2WIRE);  // set to 2WIRE or 4WIRE as necessary
+}
+
+
+void loop() {
+  uint16_t rtd = thermo.readRTD();
+
+  Serial.print("RTD value: "); Serial.println(rtd);
+  float ratio = rtd;
+  ratio /= 32768;
+  Serial.print("Ratio = "); Serial.println(ratio,8);
+  Serial.print("Resistance = "); Serial.println(RREF*ratio,8);
+  Serial.print("Temperature = "); Serial.println(thermo.temperature(RNOMINAL, RREF));
+
+  // Check and print any faults
+  uint8_t fault = thermo.readFault();
+  if (fault) {
+    Serial.print("Fault 0x"); Serial.println(fault, HEX);
+    if (fault & MAX31865_FAULT_HIGHTHRESH) {
+      Serial.println("RTD High Threshold"); 
+    }
+    if (fault & MAX31865_FAULT_LOWTHRESH) {
+      Serial.println("RTD Low Threshold"); 
+    }
+    if (fault & MAX31865_FAULT_REFINLOW) {
+      Serial.println("REFIN- > 0.85 x Bias"); 
+    }
+    if (fault & MAX31865_FAULT_REFINHIGH) {
+      Serial.println("REFIN- < 0.85 x Bias - FORCE- open"); 
+    }
+    if (fault & MAX31865_FAULT_RTDINLOW) {
+      Serial.println("RTDIN- < 0.85 x Bias - FORCE- open"); 
+    }
+    if (fault & MAX31865_FAULT_OVUV) {
+      Serial.println("Under/Over voltage"); 
+    }
+    thermo.clearFault();
+  }
+  Serial.println();
+  delay(1000);
+}

test/README

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+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html