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Tasmota/tasmota/tasmota_xsns_sensor/xsns_47_max31865.ino

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/*
xsns_47_max31865.ino - MAX31865 thermocouple sensor support for Tasmota
Copyright (C) 2021 Alberto Lopez Siemens
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef USE_MAX31865
/*********************************************************************************************\
* MAX31865 - Thermocouple
\*********************************************************************************************/
#define XSNS_47 47
#include "Adafruit_MAX31865.h"
// set defaults if not defined
#ifndef MAX31865_PTD_WIRES
#define MAX31865_PTD_WIRES 2
#endif
#ifndef MAX31865_PTD_RES
#define MAX31865_PTD_RES 100
#endif
#ifndef MAX31865_REF_RES
#define MAX31865_REF_RES 430
#endif
#ifndef MAX31865_PTD_BIAS
#define MAX31865_PTD_BIAS 0
#endif
#ifndef MAX31865_PTD_LOW_RES
#define MAX31865_PTD_LOW_RES 0
#endif
#ifndef MAX31865_PTD_HIGH_RES
#define MAX31865_PTD_HIGH_RES 0xffff
#endif
#if MAX31865_PTD_WIRES == 4
#define MAX31865_PTD_WIRESCFG MAX31865_4WIRE
#elif MAX31865_PTD_WIRES == 3
#define MAX31865_PTD_WIRESCFG MAX31865_3WIRE
#else
#define MAX31865_PTD_WIRESCFG MAX31865_2WIRE
#endif // MAX31865_PTD_WIRES
#ifdef MAX31865_PTD_WIRES1
#if MAX31865_PTD_WIRES1 == 4
#define MAX31865_PTD_WIRES1CFG MAX31865_4WIRE
#elif MAX31865_PTD_WIRES == 3
#define MAX31865_PTD_WIRES1CFG MAX31865_3WIRE
#else
#define MAX31865_PTD_WIRES1CFG MAX31865_2WIRE
#endif
#endif // MAX31865_PTD_WIRES1
#ifdef MAX31865_PTD_WIRES2
#if MAX31865_PTD_WIRES2 == 4
#define MAX31865_PTD_WIRES2CFG MAX31865_4WIRE
#elif MAX31865_PTD_WIRES == 3
#define MAX31865_PTD_WIRES2CFG MAX31865_3WIRE
#else
#define MAX31865_PTD_WIRES2CFG MAX31865_2WIRE
#endif
#endif // MAX31865_PTD_WIRES2
#ifdef MAX31865_PTD_WIRES3
#if MAX31865_PTD_WIRES3 == 4
#define MAX31865_PTD_WIRES3CFG MAX31865_4WIRE
#elif MAX31865_PTD_WIRES == 3
#define MAX31865_PTD_WIRES3CFG MAX31865_3WIRE
#else
#define MAX31865_PTD_WIRES3CFG MAX31865_2WIRE
#endif
#endif // MAX31865_PTD_WIRE3
#ifdef MAX31865_PTD_WIRES4
#if MAX31865_PTD_WIRES4 == 4
#define MAX31865_PTD_WIRES4CFG MAX31865_4WIRE
#elif MAX31865_PTD_WIRES == 3
#define MAX31865_PTD_WIRES4CFG MAX31865_3WIRE
#else
#define MAX31865_PTD_WIRES4CFG MAX31865_2WIRE
#endif
#endif // MAX31865_PTD_WIRES4
#ifdef MAX31865_PTD_WIRES5
#if MAX31865_PTD_WIRES5 == 4
#define MAX31865_PTD_WIRES5CFG MAX31865_4WIRE
#elif MAX31865_PTD_WIRES == 3
#define MAX31865_PTD_WIRES5CFG MAX31865_3WIRE
#else
#define MAX31865_PTD_WIRES5CFG MAX31865_2WIRE
#endif
#endif // MAX31865_PTD_WIRES5
#ifdef MAX31865_PTD_WIRES6
#if MAX31865_PTD_WIRES6 == 4
#define MAX31865_PTD_WIRES6CFG MAX31865_4WIRE
#elif MAX31865_PTD_WIRES == 3
#define MAX31865_PTD_WIRES6CFG MAX31865_3WIRE
#else
#define MAX31865_PTD_WIRES6CFG MAX31865_2WIRE
#endif
#endif // MAX31865_PTD_WIRES6
float RefRes [] = {
#ifdef MAX31865_REF_RES1
MAX31865_REF_RES1,
#else
MAX31865_REF_RES,
#endif
#ifdef MAX31865_REF_RES2
MAX31865_REF_RES2,
#else
MAX31865_REF_RES,
#endif
#ifdef MAX31865_REF_RES3
MAX31865_REF_RES3,
#else
MAX31865_REF_RES,
#endif
#ifdef MAX31865_REF_RES4
MAX31865_REF_RES4,
#else
MAX31865_REF_RES,
#endif
#ifdef MAX31865_REF_RES5
MAX31865_REF_RES5,
#else
MAX31865_REF_RES,
#endif
#ifdef MAX31865_REF_RES6
MAX31865_REF_RES6
#else
MAX31865_REF_RES
#endif
};
int8_t max31865_init_status = 0;
uint8_t max31865_pins_used = 0; //used as a bit array
Adafruit_MAX31865 max31865[MAX_MAX31865S];
struct MAX31865_Result_Struct {
uint8_t ErrorCode;
uint16_t Rtd;
float PtdResistance;
float PtdTemp;
} MAX31865_Result[MAX_MAX31865S];
void MAX31865_Init(void) {
if (max31865_init_status) { return; }
max31865_numwires_t PtdWires [] = {
#ifdef MAX31865_PTD_WIRES1
MAX31865_PTD_WIRES1CFG,
#else
MAX31865_PTD_WIRESCFG,
#endif
#ifdef MAX31865_PTD_WIRES2
MAX31865_PTD_WIRES2CFG,
#else
MAX31865_PTD_WIRESCFG,
#endif
#ifdef MAX31865_PTD_WIRES3
MAX31865_PTD_WIRES3CFG,
#else
MAX31865_PTD_WIRESCFG,
#endif
#ifdef MAX31865_PTD_WIRES4
MAX31865_PTD_WIRES4CFG,
#else
MAX31865_PTD_WIRESCFG,
#endif
#ifdef MAX31865_PTD_WIRES5
MAX31865_PTD_WIRES5CFG,
#else
MAX31865_PTD_WIRESCFG,
#endif
#ifdef MAX31865_PTD_WIRES6
MAX31865_PTD_WIRES6CFG
#else
MAX31865_PTD_WIRESCFG
#endif
};
float PtdLowRes [] = {
#ifdef MAX31865_PTD_LOW_RES1
MAX31865_PTD_LOW_RES1,
#else
MAX31865_PTD_LOW_RES,
#endif
#ifdef MAX31865_PTD_LOW_RES2
MAX31865_PTD_LOW_RES2,
#else
MAX31865_PTD_LOW_RES,
#endif
#ifdef MAX31865_PTD_LOW_RES3
MAX31865_PTD_LOW_RES3,
#else
MAX31865_PTD_LOW_RES,
#endif
#ifdef MAX31865_PTD_LOW_RES4
MAX31865_PTD_LOW_RES4,
#else
MAX31865_PTD_LOW_RES,
#endif
#ifdef MAX31865_PTD_LOW_RES5
MAX31865_PTD_LOW_RES5,
#else
MAX31865_PTD_LOW_RES,
#endif
#ifdef MAX31865_PTD_LOW_RES6
MAX31865_PTD_LOW_RES6
#else
MAX31865_PTD_LOW_RES
#endif
};
float PtdHighRes [] = {
#ifdef MAX31865_PTD_HIGH_RES1
MAX31865_PTD_HIGH_RES1,
#else
MAX31865_PTD_HIGH_RES,
#endif
#ifdef MAX31865_PTD_HIGH_RES2
MAX31865_PTD_HIGH_RES2,
#else
MAX31865_PTD_HIGH_RES,
#endif
#ifdef MAX31865_PTD_HIGH_RES3
MAX31865_PTD_HIGH_RES3,
#else
MAX31865_PTD_HIGH_RES,
#endif
#ifdef MAX31865_PTD_HIGH_RES4
MAX31865_PTD_HIGH_RES4,
#else
MAX31865_PTD_HIGH_RES,
#endif
#ifdef MAX31865_PTD_HIGH_RES5
MAX31865_PTD_HIGH_RES5,
#else
MAX31865_PTD_HIGH_RES,
#endif
#ifdef MAX31865_PTD_HIGH_RES6
MAX31865_PTD_HIGH_RES6
#else
MAX31865_PTD_HIGH_RES
#endif
};
max31865_init_status = 1;
for (uint32_t i = 0; i < MAX_MAX31865S; i++) {
if (PinUsed(GPIO_SSPI_MAX31865_CS1, i)) {
max31865_pins_used |= 1 << i; //set lowest bit
max31865[i].setPins(
Pin(GPIO_SSPI_MAX31865_CS1, i),
Pin(GPIO_SSPI_MOSI),
Pin(GPIO_SSPI_MISO),
Pin(GPIO_SSPI_SCLK)
);
if (!max31865[i].begin(PtdWires[i])) {
max31865_init_status = -1;
}
}
}
}
/*
* MAX31865_GetResult(void)
* Acquires the raw data via SPI, checks for MAX31865 errors and fills result structure
*/
void MAX31865_GetResult(void) {
float PtdBias [] = {
#ifdef MAX31865_PTD_BIAS1
MAX31865_PTD_BIAS1,
#else
MAX31865_PTD_BIAS,
#endif
#ifdef MAX31865_PTD_BIAS2
MAX31865_PTD_BIAS2,
#else
MAX31865_PTD_BIAS,
#endif
#ifdef MAX31865_PTD_BIAS3
MAX31865_PTD_BIAS3,
#else
MAX31865_PTD_BIAS,
#endif
#ifdef MAX31865_PTD_BIAS4
MAX31865_PTD_BIAS4,
#else
MAX31865_PTD_BIAS,
#endif
#ifdef MAX31865_PTD_BIAS5
MAX31865_PTD_BIAS5,
#else
MAX31865_PTD_BIAS,
#endif
#ifdef MAX31865_PTD_BIAS6
MAX31865_PTD_BIAS6
#else
MAX31865_PTD_BIAS
#endif
};
float PtdRes [] = {
#ifdef MAX31865_PTD_RES1
MAX31865_PTD_RES1,
#else
MAX31865_PTD_RES,
#endif
#ifdef MAX31865_PTD_RES2
MAX31865_PTD_RES2,
#else
MAX31865_PTD_RES,
#endif
#ifdef MAX31865_PTD_RES3
MAX31865_PTD_RES3,
#else
MAX31865_PTD_RES,
#endif
#ifdef MAX31865_PTD_RES4
MAX31865_PTD_RES4,
#else
MAX31865_PTD_RES,
#endif
#ifdef MAX31865_PTD_RES5
MAX31865_PTD_RES5,
#else
MAX31865_PTD_RES,
#endif
#ifdef MAX31865_PTD_RES6
MAX31865_PTD_RES6
#else
MAX31865_PTD_RES
#endif
};
for (uint32_t i = 0; i < MAX_MAX31865S; i++) {
if (max31865_pins_used & (1 << i)) {
uint16_t rtd;
rtd = max31865[i].readRTD();
MAX31865_Result[i].Rtd = rtd;
MAX31865_Result[i].PtdResistance = max31865[i].rtd_to_resistance(rtd, RefRes[i]);
MAX31865_Result[i].PtdTemp = ConvertTemp(max31865[i].rtd_to_temperature(rtd, PtdRes[i], RefRes[i]) + PtdBias[i]);
}
}
}
void MAX31865_Show(bool Json) {
uint8_t report_once = 0;
for (uint32_t i = 0; i < MAX_MAX31865S; i++) {
if (max31865_pins_used & (1 << i)) {
if (Json) {
ResponseAppend_P(PSTR(",\"MAX31865%c%d\":{\"" D_JSON_TEMPERATURE "\":%*_f,\"" D_JSON_RESISTANCE "\":%*_f,\"" D_JSON_ERROR "\":%d}"), \
IndexSeparator(), i,
Settings->flag2.temperature_resolution, &MAX31865_Result[i].PtdTemp,
Settings->flag2.temperature_resolution, &MAX31865_Result[i].PtdResistance,
MAX31865_Result[i].ErrorCode);
if ((0 == TasmotaGlobal.tele_period) && (!report_once)) {
#ifdef USE_DOMOTICZ
DomoticzFloatSensor(DZ_TEMP, MAX31865_Result[i].PtdTemp);
#endif // USE_DOMOTICZ
#ifdef USE_KNX
KnxSensor(KNX_TEMPERATURE, MAX31865_Result[i].PtdTemp);
#endif // USE_KNX
report_once++;
}
#ifdef USE_WEBSERVER
} else {
char sensorname[33];
sprintf(sensorname, "MAX31865%c%d", IndexSeparator(), i);
WSContentSend_Temp(sensorname, MAX31865_Result[i].PtdTemp);
#endif // USE_WEBSERVER
}
}
}
}
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
bool Xsns47(uint32_t function)
{
bool result = false;
if (PinUsed(GPIO_SSPI_MAX31865_CS1, GPIO_ANY) && PinUsed(GPIO_SSPI_MISO) && PinUsed(GPIO_SSPI_MOSI) && PinUsed(GPIO_SSPI_SCLK)) {
switch (function) {
case FUNC_INIT:
MAX31865_Init();
break;
case FUNC_EVERY_SECOND:
MAX31865_GetResult();
break;
case FUNC_JSON_APPEND:
MAX31865_Show(1);
break;
#ifdef USE_WEBSERVER
case FUNC_WEB_SENSOR:
MAX31865_Show(0);
break;
#endif // USE_WEBSERVER
}
}
return result;
}
#endif // USE_MAX31865
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