.

ESP32_Temperture-Node/.pio/libdeps/esp32doit-devkit-v1/Adafruit BusIO/examples/genericdevice_uartregtest/genericdevice_uartregtest.ino

@@ -0,0 +1,219 @@
+/*
+   Advanced example of using bstracted transport for reading and writing
+   register data from a UART-based device such as a TMC2209
+
+   Written with help by Claude!
+  https://claude.ai/chat/335f50b1-3dd8-435e-9139-57ec7ca26a3c (at this time
+  chats are not shareable :(
+*/
+
+#include "Adafruit_BusIO_Register.h"
+#include "Adafruit_GenericDevice.h"
+
+// Debugging macros
+#define DEBUG_SERIAL Serial
+
+#ifdef DEBUG_SERIAL
+#define DEBUG_PRINT(x) DEBUG_SERIAL.print(x)
+#define DEBUG_PRINTLN(x) DEBUG_SERIAL.println(x)
+#define DEBUG_PRINT_HEX(x)                                                     \
+  do {                                                                         \
+    if (x < 0x10)                                                              \
+      DEBUG_SERIAL.print('0');                                                 \
+    DEBUG_SERIAL.print(x, HEX);                                                \
+    DEBUG_SERIAL.print(' ');                                                   \
+  } while (0)
+#else
+#define DEBUG_PRINT(x)
+#define DEBUG_PRINTLN(x)
+#define DEBUG_PRINT_HEX(x)
+#endif
+
+#define TMC2209_IOIN 0x06
+
+class TMC2209_UART {
+private:
+  Stream *_uart_stream;
+  uint8_t _addr;
+
+  static bool uart_read(void *thiz, uint8_t *buffer, size_t len) {
+    TMC2209_UART *dev = (TMC2209_UART *)thiz;
+    uint16_t timeout = 100;
+    while (dev->_uart_stream->available() < len && timeout--) {
+      delay(1);
+    }
+    if (timeout == 0) {
+      DEBUG_PRINTLN("Read timeout!");
+      return false;
+    }
+
+    DEBUG_PRINT("Reading: ");
+    for (size_t i = 0; i < len; i++) {
+      buffer[i] = dev->_uart_stream->read();
+      DEBUG_PRINT_HEX(buffer[i]);
+    }
+    DEBUG_PRINTLN("");
+
+    return true;
+  }
+
+  static bool uart_write(void *thiz, const uint8_t *buffer, size_t len) {
+    TMC2209_UART *dev = (TMC2209_UART *)thiz;
+    DEBUG_PRINT("Writing: ");
+    for (size_t i = 0; i < len; i++) {
+      DEBUG_PRINT_HEX(buffer[i]);
+    }
+    DEBUG_PRINTLN("");
+
+    dev->_uart_stream->write(buffer, len);
+    return true;
+  }
+
+  static bool uart_readreg(void *thiz, uint8_t *addr_buf, uint8_t addrsiz,
+                           uint8_t *data, uint16_t datalen) {
+    TMC2209_UART *dev = (TMC2209_UART *)thiz;
+    while (dev->_uart_stream->available())
+      dev->_uart_stream->read();
+
+    uint8_t packet[4] = {0x05, uint8_t(dev->_addr << 1), addr_buf[0], 0x00};
+
+    packet[3] = calcCRC(packet, 3);
+    if (!uart_write(thiz, packet, 4))
+      return false;
+
+    // Read back echo
+    uint8_t echo[4];
+    if (!uart_read(thiz, echo, 4))
+      return false;
+
+    // Verify echo
+    for (uint8_t i = 0; i < 4; i++) {
+      if (echo[i] != packet[i]) {
+        DEBUG_PRINTLN("Echo mismatch");
+        return false;
+      }
+    }
+
+    uint8_t response[8]; // sync + 0xFF + reg + 4 data bytes + CRC
+    if (!uart_read(thiz, response, 8))
+      return false;
+
+    // Verify response
+    if (response[0] != 0x05) {
+      DEBUG_PRINTLN("Invalid sync byte");
+      return false;
+    }
+
+    if (response[1] != 0xFF) {
+      DEBUG_PRINTLN("Invalid reply address");
+      return false;
+    }
+
+    if (response[2] != addr_buf[0]) {
+      DEBUG_PRINTLN("Register mismatch");
+      return false;
+    }
+
+    uint8_t crc = calcCRC(response, 7);
+    if (crc != response[7]) {
+      DEBUG_PRINTLN("CRC mismatch");
+      return false;
+    }
+
+    memcpy(data, &response[3], 4);
+    return true;
+  }
+
+  static bool uart_writereg(void *thiz, uint8_t *addr_buf, uint8_t addrsiz,
+                            const uint8_t *data, uint16_t datalen) {
+    TMC2209_UART *dev = (TMC2209_UART *)thiz;
+    while (dev->_uart_stream->available())
+      dev->_uart_stream->read();
+
+    uint8_t packet[8] = {0x05,
+                         uint8_t(dev->_addr << 1),
+                         uint8_t(addr_buf[0] | 0x80),
+                         data[0],
+                         data[1],
+                         data[2],
+                         data[3],
+                         0x00};
+
+    packet[7] = calcCRC(packet, 7);
+    if (!uart_write(thiz, packet, 8))
+      return false;
+
+    uint8_t echo[8];
+    if (!uart_read(thiz, echo, 8))
+      return false;
+
+    for (uint8_t i = 0; i < 8; i++) {
+      if (echo[i] != packet[i]) {
+        DEBUG_PRINTLN("Write echo mismatch");
+        return false;
+      }
+    }
+
+    return true;
+  }
+
+  static uint8_t calcCRC(uint8_t *data, uint8_t length) {
+    uint8_t crc = 0;
+    for (uint8_t i = 0; i < length; i++) {
+      uint8_t currentByte = data[i];
+      for (uint8_t j = 0; j < 8; j++) {
+        if ((crc >> 7) ^ (currentByte & 0x01)) {
+          crc = (crc << 1) ^ 0x07;
+        } else {
+          crc = crc << 1;
+        }
+        currentByte = currentByte >> 1;
+      }
+    }
+    return crc;
+  }
+
+public:
+  TMC2209_UART(Stream *serial, uint8_t addr)
+      : _uart_stream(serial), _addr(addr) {}
+
+  Adafruit_GenericDevice *createDevice() {
+    return new Adafruit_GenericDevice(this, uart_read, uart_write, uart_readreg,
+                                      uart_writereg);
+  }
+};
+
+void setup() {
+  Serial.begin(115200);
+  while (!Serial)
+    ;
+  delay(100);
+  Serial.println("TMC2209 Generic Device register read/write test!");
+
+  Serial1.begin(115200);
+
+  TMC2209_UART uart(&Serial1, 0);
+  Adafruit_GenericDevice *device = uart.createDevice();
+  device->begin();
+
+  // Create register object for IOIN
+  Adafruit_BusIO_Register ioin_reg(device,
+                                   TMC2209_IOIN, // device and register address
+                                   4,            // width = 4 bytes
+                                   MSBFIRST,     // byte order
+                                   1);           // address width = 1 byte
+  Serial.print("IOIN = 0x");
+  Serial.println(ioin_reg.read(), HEX);
+
+  // Create RegisterBits for VERSION field (bits 31:24)
+  Adafruit_BusIO_RegisterBits version_bits(
+      &ioin_reg, 8, 24); // 8 bits wide, starting at bit 24
+
+  Serial.println("Reading VERSION...");
+  uint8_t version = version_bits.read();
+
+  Serial.print("VERSION = 0x");
+  Serial.println(version, HEX);
+}
+
+void loop() { delay(1000); }

ESP32_Temperture-Node/.pio/libdeps/esp32doit-devkit-v1/Adafruit BusIO/examples/genericdevice_uarttest/genericdevice_uarttest.ino

@@ -0,0 +1,98 @@
+/*
+   Abstracted transport for reading and writing data from a UART-based
+   device such as a TMC2209
+
+   Written with help by Claude!
+  https://claude.ai/chat/335f50b1-3dd8-435e-9139-57ec7ca26a3c (at this time
+  chats are not shareable :(
+*/
+
+#include "Adafruit_GenericDevice.h"
+
+/**
+ * Basic UART device class that demonstrates using GenericDevice with a Stream
+ * interface. This example shows how to wrap a Stream (like HardwareSerial or
+ * SoftwareSerial) with read/write callbacks that can be used by BusIO's
+ * register functions.
+ */
+class UARTDevice {
+public:
+  UARTDevice(Stream *serial) : _serial(serial) {}
+
+  // Static callback for writing data to UART
+  // Called by GenericDevice when data needs to be sent
+  static bool uart_write(void *thiz, const uint8_t *buffer, size_t len) {
+    UARTDevice *dev = (UARTDevice *)thiz;
+    dev->_serial->write(buffer, len);
+    return true;
+  }
+
+  // Static callback for reading data from UART
+  // Includes timeout and will return false if not enough data available
+  static bool uart_read(void *thiz, uint8_t *buffer, size_t len) {
+    UARTDevice *dev = (UARTDevice *)thiz;
+    uint16_t timeout = 100;
+    while (dev->_serial->available() < len && timeout--) {
+      delay(1);
+    }
+    if (timeout == 0) {
+      return false;
+    }
+    for (size_t i = 0; i < len; i++) {
+      buffer[i] = dev->_serial->read();
+    }
+    return true;
+  }
+
+  // Create a GenericDevice instance using our callbacks
+  Adafruit_GenericDevice *createDevice() {
+    return new Adafruit_GenericDevice(this, uart_read, uart_write);
+  }
+
+private:
+  Stream *_serial; // Underlying Stream instance (HardwareSerial, etc)
+};
+
+void setup() {
+  Serial.begin(115200);
+  while (!Serial)
+    ;
+  delay(100);
+
+  Serial.println("Generic Device test!");
+
+  // Initialize UART for device communication
+  Serial1.begin(115200);
+
+  // Create UART wrapper and BusIO device
+  UARTDevice uart(&Serial1);
+  Adafruit_GenericDevice *device = uart.createDevice();
+  device->begin();
+
+  // Test write/read cycle
+  uint8_t write_buf[4] = {0x5, 0x0, 0x0, 0x48};
+  uint8_t read_buf[8];
+
+  Serial.println("Writing data...");
+  if (!device->write(write_buf, 4)) {
+    Serial.println("Write failed!");
+    return;
+  }
+
+  Serial.println("Reading response...");
+  if (!device->read(read_buf, 8)) {
+    Serial.println("Read failed!");
+    return;
+  }
+
+  // Print response bytes
+  Serial.print("Got response: ");
+  for (int i = 0; i < 8; i++) {
+    Serial.print("0x");
+    Serial.print(read_buf[i], HEX);
+    Serial.print(" ");
+  }
+  Serial.println();
+}
+
+void loop() { delay(1000); }

ESP32_Temperture-Node/.pio/libdeps/esp32doit-devkit-v1/Adafruit BusIO/examples/i2c_address_detect/i2c_address_detect.ino

@@ -0,0 +1,22 @@
+#include <Adafruit_I2CDevice.h>
+
+Adafruit_I2CDevice i2c_dev = Adafruit_I2CDevice(0x10);
+
+void setup() {
+  while (!Serial) {
+    delay(10);
+  }
+  Serial.begin(115200);
+  Serial.println("I2C address detection test");
+
+  if (!i2c_dev.begin()) {
+    Serial.print("Did not find device at 0x");
+    Serial.println(i2c_dev.address(), HEX);
+    while (1)
+      ;
+  }
+  Serial.print("Device found on address 0x");
+  Serial.println(i2c_dev.address(), HEX);
+}
+
+void loop() {}

ESP32_Temperture-Node/.pio/libdeps/esp32doit-devkit-v1/Adafruit BusIO/examples/i2c_readwrite/i2c_readwrite.ino

@@ -0,0 +1,45 @@
+#include <Adafruit_I2CDevice.h>
+
+#define I2C_ADDRESS 0x60
+Adafruit_I2CDevice i2c_dev = Adafruit_I2CDevice(I2C_ADDRESS);
+
+void setup() {
+  while (!Serial) {
+    delay(10);
+  }
+  Serial.begin(115200);
+  Serial.println("I2C device read and write test");
+
+  if (!i2c_dev.begin()) {
+    Serial.print("Did not find device at 0x");
+    Serial.println(i2c_dev.address(), HEX);
+    while (1)
+      ;
+  }
+  Serial.print("Device found on address 0x");
+  Serial.println(i2c_dev.address(), HEX);
+
+  uint8_t buffer[32];
+  // Try to read 32 bytes
+  i2c_dev.read(buffer, 32);
+  Serial.print("Read: ");
+  for (uint8_t i = 0; i < 32; i++) {
+    Serial.print("0x");
+    Serial.print(buffer[i], HEX);
+    Serial.print(", ");
+  }
+  Serial.println();
+
+  // read a register by writing first, then reading
+  buffer[0] = 0x0C; // we'll reuse the same buffer
+  i2c_dev.write_then_read(buffer, 1, buffer, 2, false);
+  Serial.print("Write then Read: ");
+  for (uint8_t i = 0; i < 2; i++) {
+    Serial.print("0x");
+    Serial.print(buffer[i], HEX);
+    Serial.print(", ");
+  }
+  Serial.println();
+}
+
+void loop() {}

ESP32_Temperture-Node/.pio/libdeps/esp32doit-devkit-v1/Adafruit BusIO/examples/i2c_registers/i2c_registers.ino

@@ -0,0 +1,43 @@
+#include <Adafruit_BusIO_Register.h>
+#include <Adafruit_I2CDevice.h>
+
+#define I2C_ADDRESS 0x60
+Adafruit_I2CDevice i2c_dev = Adafruit_I2CDevice(I2C_ADDRESS);
+
+void setup() {
+  while (!Serial) {
+    delay(10);
+  }
+  Serial.begin(115200);
+  Serial.println("I2C device register test");
+
+  if (!i2c_dev.begin()) {
+    Serial.print("Did not find device at 0x");
+    Serial.println(i2c_dev.address(), HEX);
+    while (1)
+      ;
+  }
+  Serial.print("Device found on address 0x");
+  Serial.println(i2c_dev.address(), HEX);
+
+  Adafruit_BusIO_Register id_reg =
+      Adafruit_BusIO_Register(&i2c_dev, 0x0C, 2, LSBFIRST);
+  uint16_t id;
+  id_reg.read(&id);
+  Serial.print("ID register = 0x");
+  Serial.println(id, HEX);
+
+  Adafruit_BusIO_Register thresh_reg =
+      Adafruit_BusIO_Register(&i2c_dev, 0x01, 2, LSBFIRST);
+  uint16_t thresh;
+  thresh_reg.read(&thresh);
+  Serial.print("Initial threshold register = 0x");
+  Serial.println(thresh, HEX);
+
+  thresh_reg.write(~thresh);
+
+  Serial.print("Post threshold register = 0x");
+  Serial.println(thresh_reg.read(), HEX);
+}
+
+void loop() {}

ESP32_Temperture-Node/.pio/libdeps/esp32doit-devkit-v1/Adafruit BusIO/examples/i2corspi_register/i2corspi_register.ino

@@ -0,0 +1,40 @@
+#include <Adafruit_BusIO_Register.h>
+
+// Define which interface to use by setting the unused interface to NULL!
+
+#define SPIDEVICE_CS 10
+Adafruit_SPIDevice *spi_dev = NULL; // new Adafruit_SPIDevice(SPIDEVICE_CS);
+
+#define I2C_ADDRESS 0x5D
+Adafruit_I2CDevice *i2c_dev = new Adafruit_I2CDevice(I2C_ADDRESS);
+
+void setup() {
+  while (!Serial) {
+    delay(10);
+  }
+  Serial.begin(115200);
+  Serial.println("I2C or SPI device register test");
+
+  if (spi_dev && !spi_dev->begin()) {
+    Serial.println("Could not initialize SPI device");
+  }
+
+  if (i2c_dev) {
+    if (i2c_dev->begin()) {
+      Serial.print("Device found on I2C address 0x");
+      Serial.println(i2c_dev->address(), HEX);
+    } else {
+      Serial.print("Did not find I2C device at 0x");
+      Serial.println(i2c_dev->address(), HEX);
+    }
+  }
+
+  Adafruit_BusIO_Register id_reg =
+      Adafruit_BusIO_Register(i2c_dev, spi_dev, ADDRBIT8_HIGH_TOREAD, 0x0F);
+  uint8_t id = 0;
+  id_reg.read(&id);
+  Serial.print("ID register = 0x");
+  Serial.println(id, HEX);
+}
+
+void loop() {}

ESP32_Temperture-Node/.pio/libdeps/esp32doit-devkit-v1/Adafruit BusIO/examples/spi_modetest/spi_modetest.ino

@@ -0,0 +1,35 @@
+#include <Adafruit_SPIDevice.h>
+
+#define SPIDEVICE_CS 10
+Adafruit_SPIDevice spi_dev =
+    Adafruit_SPIDevice(SPIDEVICE_CS, 100000, SPI_BITORDER_MSBFIRST, SPI_MODE1);
+// Adafruit_SPIDevice spi_dev = Adafruit_SPIDevice(SPIDEVICE_CS, 13, 12, 11,
+// 100000, SPI_BITORDER_MSBFIRST, SPI_MODE1);
+
+void setup() {
+  while (!Serial) {
+    delay(10);
+  }
+  Serial.begin(115200);
+  Serial.println("SPI device mode test");
+
+  if (!spi_dev.begin()) {
+    Serial.println("Could not initialize SPI device");
+    while (1)
+      ;
+  }
+}
+
+void loop() {
+  Serial.println("\n\nTransfer test");
+  for (uint16_t x = 0; x <= 0xFF; x++) {
+    uint8_t i = x;
+    Serial.print("0x");
+    Serial.print(i, HEX);
+    spi_dev.read(&i, 1, i);
+    Serial.print("/");
+    Serial.print(i, HEX);
+    Serial.print(", ");
+    delay(25);
+  }
+}

ESP32_Temperture-Node/.pio/libdeps/esp32doit-devkit-v1/Adafruit BusIO/examples/spi_readwrite/spi_readwrite.ino

@@ -0,0 +1,43 @@
+#include <Adafruit_SPIDevice.h>
+
+#define SPIDEVICE_CS 10
+Adafruit_SPIDevice spi_dev = Adafruit_SPIDevice(SPIDEVICE_CS);
+
+void setup() {
+  while (!Serial) {
+    delay(10);
+  }
+  Serial.begin(115200);
+  Serial.println("SPI device read and write test");
+
+  if (!spi_dev.begin()) {
+    Serial.println("Could not initialize SPI device");
+    while (1)
+      ;
+  }
+
+  uint8_t buffer[32];
+
+  // Try to read 32 bytes
+  spi_dev.read(buffer, 32);
+  Serial.print("Read: ");
+  for (uint8_t i = 0; i < 32; i++) {
+    Serial.print("0x");
+    Serial.print(buffer[i], HEX);
+    Serial.print(", ");
+  }
+  Serial.println();
+
+  // read a register by writing first, then reading
+  buffer[0] = 0x8F; // we'll reuse the same buffer
+  spi_dev.write_then_read(buffer, 1, buffer, 2, false);
+  Serial.print("Write then Read: ");
+  for (uint8_t i = 0; i < 2; i++) {
+    Serial.print("0x");
+    Serial.print(buffer[i], HEX);
+    Serial.print(", ");
+  }
+  Serial.println();
+}
+
+void loop() {}

ESP32_Temperture-Node/.pio/libdeps/esp32doit-devkit-v1/Adafruit BusIO/examples/spi_register_bits/spi_register_bits.ino

@@ -0,0 +1,268 @@
+/***************************************************
+
+  This is an example for how to use Adafruit_BusIO_RegisterBits from
+ Adafruit_BusIO library.
+
+  Designed specifically to work with the Adafruit RTD Sensor
+  ----> https://www.adafruit.com/products/3328
+  uisng a MAX31865 RTD-to-Digital Converter
+  ----> https://datasheets.maximintegrated.com/en/ds/MAX31865.pdf
+
+  This sensor uses SPI to communicate, 4 pins are required to
+  interface.
+  A fifth pin helps to detect when a new conversion is ready.
+
+  Adafruit invests time and resources providing this open source code,
+  please support Adafruit and open-source hardware by purchasing
+  products from Adafruit!
+
+  Example written (2020/3) by Andreas Hardtung/AnHard.
+  BSD license, all text above must be included in any redistribution
+ ****************************************************/
+
+#include <Adafruit_BusIO_Register.h>
+#include <Adafruit_SPIDevice.h>
+
+#define MAX31865_SPI_SPEED (5000000)
+#define MAX31865_SPI_BITORDER (SPI_BITORDER_MSBFIRST)
+#define MAX31865_SPI_MODE (SPI_MODE1)
+
+#define MAX31865_SPI_CS (10)
+#define MAX31865_READY_PIN (2)
+
+Adafruit_SPIDevice spi_dev = Adafruit_SPIDevice(
+    MAX31865_SPI_CS, MAX31865_SPI_SPEED, MAX31865_SPI_BITORDER,
+    MAX31865_SPI_MODE, &SPI); // Hardware SPI
+// Adafruit_SPIDevice spi_dev = Adafruit_SPIDevice( MAX31865_SPI_CS, 13, 12, 11,
+// MAX31865_SPI_SPEED, MAX31865_SPI_BITORDER, MAX31865_SPI_MODE); // Software
+// SPI
+
+// MAX31865 chip related
+// *********************************************************************************************
+Adafruit_BusIO_Register config_reg =
+    Adafruit_BusIO_Register(&spi_dev, 0x00, ADDRBIT8_HIGH_TOWRITE, 1, MSBFIRST);
+Adafruit_BusIO_RegisterBits bias_bit =
+    Adafruit_BusIO_RegisterBits(&config_reg, 1, 7);
+Adafruit_BusIO_RegisterBits auto_bit =
+    Adafruit_BusIO_RegisterBits(&config_reg, 1, 6);
+Adafruit_BusIO_RegisterBits oneS_bit =
+    Adafruit_BusIO_RegisterBits(&config_reg, 1, 5);
+Adafruit_BusIO_RegisterBits wire_bit =
+    Adafruit_BusIO_RegisterBits(&config_reg, 1, 4);
+Adafruit_BusIO_RegisterBits faultT_bits =
+    Adafruit_BusIO_RegisterBits(&config_reg, 2, 2);
+Adafruit_BusIO_RegisterBits faultR_bit =
+    Adafruit_BusIO_RegisterBits(&config_reg, 1, 1);
+Adafruit_BusIO_RegisterBits fi50hz_bit =
+    Adafruit_BusIO_RegisterBits(&config_reg, 1, 0);
+
+Adafruit_BusIO_Register rRatio_reg =
+    Adafruit_BusIO_Register(&spi_dev, 0x01, ADDRBIT8_HIGH_TOWRITE, 2, MSBFIRST);
+Adafruit_BusIO_RegisterBits rRatio_bits =
+    Adafruit_BusIO_RegisterBits(&rRatio_reg, 15, 1);
+Adafruit_BusIO_RegisterBits fault_bit =
+    Adafruit_BusIO_RegisterBits(&rRatio_reg, 1, 0);
+
+Adafruit_BusIO_Register maxRratio_reg =
+    Adafruit_BusIO_Register(&spi_dev, 0x03, ADDRBIT8_HIGH_TOWRITE, 2, MSBFIRST);
+Adafruit_BusIO_RegisterBits maxRratio_bits =
+    Adafruit_BusIO_RegisterBits(&maxRratio_reg, 15, 1);
+
+Adafruit_BusIO_Register minRratio_reg =
+    Adafruit_BusIO_Register(&spi_dev, 0x05, ADDRBIT8_HIGH_TOWRITE, 2, MSBFIRST);
+Adafruit_BusIO_RegisterBits minRratio_bits =
+    Adafruit_BusIO_RegisterBits(&minRratio_reg, 15, 1);
+
+Adafruit_BusIO_Register fault_reg =
+    Adafruit_BusIO_Register(&spi_dev, 0x07, ADDRBIT8_HIGH_TOWRITE, 1, MSBFIRST);
+Adafruit_BusIO_RegisterBits range_high_fault_bit =
+    Adafruit_BusIO_RegisterBits(&fault_reg, 1, 7);
+Adafruit_BusIO_RegisterBits range_low_fault_bit =
+    Adafruit_BusIO_RegisterBits(&fault_reg, 1, 6);
+Adafruit_BusIO_RegisterBits refin_high_fault_bit =
+    Adafruit_BusIO_RegisterBits(&fault_reg, 1, 5);
+Adafruit_BusIO_RegisterBits refin_low_fault_bit =
+    Adafruit_BusIO_RegisterBits(&fault_reg, 1, 4);
+Adafruit_BusIO_RegisterBits rtdin_low_fault_bit =
+    Adafruit_BusIO_RegisterBits(&fault_reg, 1, 3);
+Adafruit_BusIO_RegisterBits voltage_fault_bit =
+    Adafruit_BusIO_RegisterBits(&fault_reg, 1, 2);
+
+// Print the details of the configuration register.
+void printConfig(void) {
+  Serial.print("BIAS: ");
+  if (bias_bit.read())
+    Serial.print("ON");
+  else
+    Serial.print("OFF");
+  Serial.print(", AUTO: ");
+  if (auto_bit.read())
+    Serial.print("ON");
+  else
+    Serial.print("OFF");
+  Serial.print(", ONES: ");
+  if (oneS_bit.read())
+    Serial.print("ON");
+  else
+    Serial.print("OFF");
+  Serial.print(", WIRE: ");
+  if (wire_bit.read())
+    Serial.print("3");
+  else
+    Serial.print("2/4");
+  Serial.print(", FAULTCLEAR: ");
+  if (faultR_bit.read())
+    Serial.print("ON");
+  else
+    Serial.print("OFF");
+  Serial.print(", ");
+  if (fi50hz_bit.read())
+    Serial.print("50HZ");
+  else
+    Serial.print("60HZ");
+  Serial.println();
+}
+
+// Check and print faults. Then clear them.
+void checkFaults(void) {
+  if (fault_bit.read()) {
+    Serial.print("MAX: ");
+    Serial.println(maxRratio_bits.read());
+    Serial.print("VAL: ");
+    Serial.println(rRatio_bits.read());
+    Serial.print("MIN: ");
+    Serial.println(minRratio_bits.read());
+
+    if (range_high_fault_bit.read())
+      Serial.println("Range high fault");
+    if (range_low_fault_bit.read())
+      Serial.println("Range low fault");
+    if (refin_high_fault_bit.read())
+      Serial.println("REFIN high fault");
+    if (refin_low_fault_bit.read())
+      Serial.println("REFIN low fault");
+    if (rtdin_low_fault_bit.read())
+      Serial.println("RTDIN low fault");
+    if (voltage_fault_bit.read())
+      Serial.println("Voltage fault");
+
+    faultR_bit.write(1); // clear fault
+  }
+}
+
+void setup() {
+#if (MAX31865_1_READY_PIN != -1)
+  pinMode(MAX31865_READY_PIN, INPUT_PULLUP);
+#endif
+
+  while (!Serial) {
+    delay(10);
+  }
+  Serial.begin(115200);
+  Serial.println("SPI Adafruit_BusIO_RegisterBits test on MAX31865");
+
+  if (!spi_dev.begin()) {
+    Serial.println("Could not initialize SPI device");
+    while (1)
+      ;
+  }
+
+  // Set up for automode 50Hz. We don't care about selfheating. We want the
+  // highest possible sampling rate.
+  auto_bit.write(0);   // Don't switch filtermode while auto_mode is on.
+  fi50hz_bit.write(1); // Set filter to 50Hz mode.
+  faultR_bit.write(1); // Clear faults.
+  bias_bit.write(1); // In automode we want to have the bias current always on.
+  delay(5);          // Wait until bias current settles down.
+                     // 10.5 time constants of the input RC network is required.
+  // 10ms worst case for 10kω reference resistor and a 0.1µF capacitor
+  // across the RTD inputs. Adafruit Module has 0.1µF and only
+  // 430/4300ω So here 0.43/4.3ms
+  auto_bit.write(
+      1); // Now we can set automode. Automatically starting first conversion.
+
+// Test the READY_PIN
+#if (defined(MAX31865_READY_PIN) && (MAX31865_READY_PIN != -1))
+  int i = 0;
+  while (digitalRead(MAX31865_READY_PIN) && i++ <= 100) {
+    delay(1);
+  }
+  if (i >= 100) {
+    Serial.print("ERROR: Max31865 Pin detection does not work. PIN:");
+    Serial.println(MAX31865_READY_PIN);
+  }
+#else
+  delay(100);
+#endif
+
+  // Set ratio range.
+  // Setting the temperatures would need some more calculation - not related to
+  // Adafruit_BusIO_RegisterBits.
+  uint16_t ratio = rRatio_bits.read();
+  maxRratio_bits.write((ratio < 0x8fffu - 1000u) ? ratio + 1000u : 0x8fffu);
+  minRratio_bits.write((ratio > 1000u) ? ratio - 1000u : 0u);
+
+  printConfig();
+  checkFaults();
+}
+
+void loop() {
+#if (defined(MAX31865_READY_PIN) && (MAX31865_1_READY_PIN != -1))
+  // Is conversion ready?
+  if (!digitalRead(MAX31865_READY_PIN))
+#else
+  // Warant conversion is ready.
+  delay(21); // 21ms for 50Hz-mode. 19ms in 60Hz-mode.
+#endif
+  {
+    // Read ratio, calculate temperature, scale, filter and print.
+    Serial.println(rRatio2C(rRatio_bits.read()) * 100.0f,
+                   0); // Temperature scaled by 100
+    // Check, print, clear faults.
+    checkFaults();
+  }
+
+  // Do something else.
+  // delay(15000);
+}
+
+// Module/Sensor related. Here Adafruit PT100 module with a 2_Wire PT100 Class C
+// *****************************
+float rRatio2C(uint16_t ratio) {
+  // A simple linear conversion.
+  const float R0 = 100.0f;
+  const float Rref = 430.0f;
+  const float alphaPT = 0.003850f;
+  const float ADCmax = (1u << 15) - 1.0f;
+  const float rscale = Rref / ADCmax;
+  // Measured temperature in boiling water 101.08°C with factor a = 1 and b = 0.
+  // Rref and MAX at about 22±2°C. Measured temperature in ice/water bath 0.76°C
+  // with factor a = 1 and b = 0. Rref and MAX at about 22±2°C.
+  // const float a = 1.0f / (alphaPT * R0);
+  const float a = (100.0f / 101.08f) / (alphaPT * R0);
+  // const float b = 0.0f;  // 101.08
+  const float b = -0.76f; // 100.32 > 101.08
+
+  return filterRing(((ratio * rscale) - R0) * a + b);
+}
+
+// General purpose
+// *********************************************************************************************
+#define RINGLENGTH 250
+float filterRing(float newVal) {
+  static float ring[RINGLENGTH] = {0.0};
+  static uint8_t ringIndex = 0;
+  static bool ringFull = false;
+
+  if (ringIndex == RINGLENGTH) {
+    ringFull = true;
+    ringIndex = 0;
+  }
+  ring[ringIndex] = newVal;
+  uint8_t loopEnd = (ringFull) ? RINGLENGTH : ringIndex + 1;
+  float ringSum = 0.0f;
+  for (uint8_t i = 0; i < loopEnd; i++)
+    ringSum += ring[i];
+  ringIndex++;
+  return ringSum / loopEnd;
+}

ESP32_Temperture-Node/.pio/libdeps/esp32doit-devkit-v1/Adafruit BusIO/examples/spi_registers/spi_registers.ino

@@ -0,0 +1,40 @@
+#include <Adafruit_BusIO_Register.h>
+#include <Adafruit_SPIDevice.h>
+
+#define SPIDEVICE_CS 10
+Adafruit_SPIDevice spi_dev = Adafruit_SPIDevice(SPIDEVICE_CS);
+
+void setup() {
+  while (!Serial) {
+    delay(10);
+  }
+  Serial.begin(115200);
+  Serial.println("SPI device register test");
+
+  if (!spi_dev.begin()) {
+    Serial.println("Could not initialize SPI device");
+    while (1)
+      ;
+  }
+
+  Adafruit_BusIO_Register id_reg =
+      Adafruit_BusIO_Register(&spi_dev, 0x0F, ADDRBIT8_HIGH_TOREAD);
+  uint8_t id = 0;
+  id_reg.read(&id);
+  Serial.print("ID register = 0x");
+  Serial.println(id, HEX);
+
+  Adafruit_BusIO_Register thresh_reg = Adafruit_BusIO_Register(
+      &spi_dev, 0x0C, ADDRBIT8_HIGH_TOREAD, 2, LSBFIRST);
+  uint16_t thresh = 0;
+  thresh_reg.read(&thresh);
+  Serial.print("Initial threshold register = 0x");
+  Serial.println(thresh, HEX);
+
+  thresh_reg.write(~thresh);
+
+  Serial.print("Post threshold register = 0x");
+  Serial.println(thresh_reg.read(), HEX);
+}
+
+void loop() {}