Tasmota/tasmota/xsns_77_vl53l1x.ino

/*
  xsns_77_vl53l1x_device[0].ino - VL53L1X sensor support for Tasmota

  Copyright (C) 2021  Theo Arends, Rui Marinho and Johann Obermeier

  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_I2C
#ifdef USE_VL53L1X
/*********************************************************************************************\
 * VL53L1X
 *
 * Source:
 *
 * I2C Address: 0x29
\*********************************************************************************************/

#define XSNS_77     77
#define XI2C_54     54  // See I2CDEVICES.md

#define VL53LXX_MAX_SENSORS   VL53L0X_MAX_SENSORS
#define GPIO_VL53LXX_XSHUT1   GPIO_VL53L0X_XSHUT1

#include "VL53L1X.h"
VL53L1X vl53l1x_device[VL53LXX_MAX_SENSORS];

#define VL53LXX_ADDRESS 0x29
#ifndef VL53LXX_ADDRESS_MOVED
#define VL53LXX_ADDRESS_MOVED 0x78
#endif

struct {
  uint16_t distance = 0;
} vl53l1x_data[VL53LXX_MAX_SENSORS];

uint8_t VL53L1X_xshut = 0;
uint8_t VL53L1X_detected = 0;

/********************************************************************************************/

void Vl53l1Detect(void) {

  uint32_t i, xshut;
  for (i = 0, xshut = 1 ; i < VL53LXX_MAX_SENSORS ; i++, xshut <<= 1) {
    if (PinUsed(GPIO_VL53LXX_XSHUT1, i)) {
      pinMode(Pin(GPIO_VL53LXX_XSHUT1, i), OUTPUT);
      digitalWrite(Pin(GPIO_VL53LXX_XSHUT1, i), 0);
      VL53L1X_xshut |= xshut;
    }
  }

  for (i = 0, xshut = 1 ; i < VL53LXX_MAX_SENSORS ; i++, xshut <<= 1 ) {
    if (xshut & VL53L1X_xshut) {
      digitalWrite(Pin(GPIO_VL53LXX_XSHUT1, i), 1);
      delay(2);
    }
    if (!I2cSetDevice(VL53LXX_ADDRESS) && !I2cSetDevice((uint8_t)(VL53LXX_ADDRESS_MOVED+i))) { return; } // Detection for unconfigured OR configured sensor
    if (VL53L1X_xshut) { vl53l1x_device[i].setAddress((uint8_t)(VL53LXX_ADDRESS_MOVED+i)); }
    uint8_t addr = vl53l1x_device[i].getAddress();
    if (vl53l1x_device[i].init()) {
      vl53l1x_device[i].setTimeout(500);
      vl53l1x_device[i].setDistanceMode(VL53L1X::Long); // could be Short, Medium, Long
      vl53l1x_device[i].setMeasurementTimingBudget(140000);
      vl53l1x_device[i].startContinuous(50);
      VL53L1X_detected |= xshut;

      if (VL53L1X_xshut) {
          I2cSetActive(addr);
          AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_I2C D_SENSOR " VL53L1X-%d " D_SENSOR_DETECTED " - " D_NEW_ADDRESS " 0x%02X"), i+1, addr);
      } else {
          I2cSetActiveFound(addr, "VL53L1X");
          break;
      }
    }
  }
}

void Vl53l1Every_250MSecond(void) {
  uint32_t i, xshut;
  for (i = 0, xshut = 1; i < VL53LXX_MAX_SENSORS; i++, xshut <<= 1) {
    if (xshut & VL53L1X_detected) {
      uint16_t dist = vl53l1x_device[i].read();
      if (!dist || dist > 4000) {
        dist = 9999;
      }
      vl53l1x_data[i].distance = dist;
    } // if detected
    if (0 == VL53L1X_xshut) {
      break;
    }
  } // for
}

#ifdef USE_DOMOTICZ
void Vl53l1Every_Second(void) {
  char distance[FLOATSZ];
  dtostrfd((float)vl53l1x_data[0].distance / 10, 1, distance);
  DomoticzSensor(DZ_ILLUMINANCE, distance);
}
#endif  // USE_DOMOTICZ

void Vl53l1Show(bool json) {
  uint32_t i, xshut;
  for (i = 0, xshut = 1 ; i < VL53LXX_MAX_SENSORS ; i++, xshut <<= 1) {
    if (xshut & VL53L1X_detected) {
      if (json) {
        if (0 == VL53L1X_xshut) {
          ResponseAppend_P(PSTR(",\"VL53L1X\":{\"" D_JSON_DISTANCE "\":%d}"), vl53l1x_data[i].distance);
        }
        else {
          ResponseAppend_P(PSTR(",\"VL53L1X%c%d\":{\"" D_JSON_DISTANCE "\":%d}"), IndexSeparator(), i+1, vl53l1x_data[i].distance);
        }
#ifdef USE_DOMOTICZ
        if (0 == TasmotaGlobal.tele_period) {
          Vl53l1Every_Second();
        }
#endif  // USE_DOMOTICZ
#ifdef USE_WEBSERVER
      }
      else {
        if (0 == VL53L1X_xshut) {
          WSContentSend_PD(HTTP_SNS_DISTANCE, PSTR("VL53L1X"), vl53l1x_data[i].distance);
        }
        else {
          WSContentSend_PD(HTTP_SNS_DISTANCE, PSTR("VL53L1X%c%d"), IndexSeparator(), i+1, vl53l1x_data[i].distance);
        }
#endif
      }
    } // if detected
    if (0 == VL53L1X_xshut) {
      break;
    }
  } // for
}

/*********************************************************************************************\
 * Interface
\*********************************************************************************************/

bool Xsns77(uint8_t function) {
  if (!I2cEnabled(XI2C_54)) { return false; }

  bool result = false;

  if (FUNC_INIT == function) {
    Vl53l1Detect();
  }
  else if (VL53L1X_detected) {
    switch (function) {
      case FUNC_EVERY_250_MSECOND:
        Vl53l1Every_250MSecond();
        break;
#ifdef USE_DOMOTICZ
     case FUNC_EVERY_SECOND:
        Vl53l1Every_Second();
        break;
#endif  // USE_DOMOTICZ
      case FUNC_JSON_APPEND:
        Vl53l1Show(1);
        break;
#ifdef USE_WEBSERVER
      case FUNC_WEB_SENSOR:
        Vl53l1Show(0);
        break;
#endif  // USE_WEBSERVER
    }
  }
  return result;
}

#endif  // USE_VL53L1X
#endif  // USE_I2C