mirror of https://github.com/arendst/Tasmota.git
145 lines
3.5 KiB
C++
145 lines
3.5 KiB
C++
/*
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xsns_45_vl53l0x.ino - VL53L0X support for Tasmota
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Copyright (C) 2020 Theo Arends and Gerhard Mutz
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef USE_I2C
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#ifdef USE_VL53L0X
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#define XSNS_45 45
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#define XI2C_31 31 // See I2CDEVICES.md
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#include <Wire.h>
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#include "VL53L0X.h"
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VL53L0X sensor;
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uint8_t vl53l0x_ready = 0;
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uint16_t vl53l0x_distance;
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uint16_t Vl53l0_buffer[5];
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uint8_t Vl53l0_index;
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/********************************************************************************************/
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void Vl53l0Detect(void)
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{
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if (!I2cSetDevice(0x29)) { return; }
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if (!sensor.init()) { return; }
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I2cSetActiveFound(sensor.getAddress(), "VL53L0X");
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sensor.setTimeout(500);
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// Start continuous back-to-back mode (take readings as
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// fast as possible). To use continuous timed mode
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// instead, provide a desired inter-measurement period in
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// ms (e.g. sensor.startContinuous(100)).
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sensor.startContinuous();
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vl53l0x_ready = 1;
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Vl53l0_index=0;
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}
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#ifdef USE_WEBSERVER
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const char HTTP_SNS_VL53L0X[] PROGMEM =
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"{s}VL53L0X " D_DISTANCE "{m}%d" D_UNIT_MILLIMETER "{e}"; // {s} = <tr><th>, {m} = </th><td>, {e} = </td></tr>
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#endif // USE_WEBSERVER
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#define USE_VL_MEDIAN
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void Vl53l0Every_250MSecond(void)
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{
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uint16_t tbuff[5],tmp;
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uint8_t flag;
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// every 200 ms
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uint16_t dist = sensor.readRangeContinuousMillimeters();
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if (dist==0 || dist>2000) {
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dist=9999;
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}
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#ifdef USE_VL_MEDIAN
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// store in ring buffer
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Vl53l0_buffer[Vl53l0_index]=dist;
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Vl53l0_index++;
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if (Vl53l0_index>=5) Vl53l0_index=0;
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// sort list and take median
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memmove(tbuff,Vl53l0_buffer,sizeof(tbuff));
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for (byte ocnt=0; ocnt<5; ocnt++) {
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flag=0;
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for (byte count=0; count<4; count++) {
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if (tbuff[count]>tbuff[count+1]) {
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tmp=tbuff[count];
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tbuff[count]=tbuff[count+1];
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tbuff[count+1]=tmp;
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flag=1;
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}
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}
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if (!flag) break;
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}
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vl53l0x_distance=tbuff[2];
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#else
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vl53l0x_distance=dist;
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#endif
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}
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void Vl53l0Show(boolean json)
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{
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if (json) {
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ResponseAppend_P(PSTR(",\"VL53L0X\":{\"" D_JSON_DISTANCE "\":%d}"), vl53l0x_distance);
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#ifdef USE_WEBSERVER
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} else {
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WSContentSend_PD(HTTP_SNS_VL53L0X, vl53l0x_distance);
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#endif
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}
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}
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/*********************************************************************************************\
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* Interface
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\*********************************************************************************************/
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bool Xsns45(byte function)
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{
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if (!I2cEnabled(XI2C_31)) { return false; }
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bool result = false;
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if (FUNC_INIT == function) {
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Vl53l0Detect();
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}
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else if (vl53l0x_ready) {
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switch (function) {
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case FUNC_EVERY_250_MSECOND:
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Vl53l0Every_250MSecond();
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break;
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case FUNC_JSON_APPEND:
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Vl53l0Show(1);
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break;
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#ifdef USE_WEBSERVER
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case FUNC_WEB_SENSOR:
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Vl53l0Show(0);
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break;
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#endif // USE_WEBSERVER
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}
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}
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return result;
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}
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#endif // USE_VL53L0X
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#endif // USE_I2C
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