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352 lines
11 KiB
352 lines
11 KiB
// -----------------------------------------------------------------------------
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// PMS Dust Sensor
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// Uses SoftwareSerial library
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// Contribution by Òscar Rovira López
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// Refine to support PMS5003T/PMS5003ST by Yonsm Guo
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// -----------------------------------------------------------------------------
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#if SENSOR_SUPPORT && PMSX003_SUPPORT
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#pragma once
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#include "Arduino.h"
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#include "BaseSensor.h"
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#if PMS_USE_SOFT
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#include <SoftwareSerial.h>
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#endif
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// Generic data
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#define PMS_BAUD_RATE 9600
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// Type of sensor
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#define PMS_TYPE_X003 0
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#define PMS_TYPE_X003_9 1
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#define PMS_TYPE_5003T 2
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#define PMS_TYPE_5003ST 3
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// Sensor type specified data
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#define PMS_SLOT_MAX 4
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#define PMS_DATA_MAX 17
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const static struct {
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const char *name;
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unsigned char data_count;
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unsigned char slot_count;
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unsigned char slot_types[PMS_SLOT_MAX];
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} pms_specs[] = {
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{"PMSX003", 13, 3, {MAGNITUDE_PM1dot0, MAGNITUDE_PM2dot5, MAGNITUDE_PM10}},
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{"PMSX003_9", 9, 3, {MAGNITUDE_PM1dot0, MAGNITUDE_PM2dot5, MAGNITUDE_PM10}},
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{"PMS5003T", 13, 3, {MAGNITUDE_PM2dot5, MAGNITUDE_TEMPERATURE, MAGNITUDE_HUMIDITY}},
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{"PMS5003ST", 17, 4, {MAGNITUDE_PM2dot5, MAGNITUDE_TEMPERATURE, MAGNITUDE_HUMIDITY, MAGNITUDE_HCHO}}
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};
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// [MAGIC][LEN][DATA9|13|17][SUM]
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#define PMS_PACKET_SIZE(data_count) ((data_count + 3) * 2)
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#define PMS_PAYLOAD_SIZE(data_count) ((data_count + 1) * 2)
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// PMS sensor utils
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// Command functions copied from: https://github.com/fu-hsi/PMS/blob/master/src/PMS.cpp
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// Reading function is rewrited to support flexible reading for PMS5003T/PMS5003ST
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class PMSX003 {
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protected:
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Stream *_serial = NULL; // Should initialized by child class
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public:
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// Standby mode. For low power consumption and prolong the life of the sensor.
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inline void sleep() {
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uint8_t command[] = { 0x42, 0x4D, 0xE4, 0x00, 0x00, 0x01, 0x73 };
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_serial->write(command, sizeof(command));
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}
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// Operating mode. Stable data should be got at least 30 seconds after the sensor wakeup from the sleep mode because of the fan's performance.
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inline void wakeUp() {
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uint8_t command[] = { 0x42, 0x4D, 0xE4, 0x00, 0x01, 0x01, 0x74 };
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_serial->write(command, sizeof(command));
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}
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// Active mode. Default mode after power up. In this mode sensor would send serial data to the host automatically.
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inline void activeMode() {
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uint8_t command[] = { 0x42, 0x4D, 0xE1, 0x00, 0x01, 0x01, 0x71 };
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_serial->write(command, sizeof(command));
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}
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// Passive mode. In this mode, sensor would send serial data to the host only for request.
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inline void passiveMode() {
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uint8_t command[] = { 0x42, 0x4D, 0xE1, 0x00, 0x00, 0x01, 0x70 };
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_serial->write(command, sizeof(command));
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}
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// Request read, ONLY needed in Passive Mode!!
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inline void requestRead() {
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uint8_t command[] = { 0x42, 0x4D, 0xE2, 0x00, 0x00, 0x01, 0x71 };
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_serial->write(command, sizeof(command));
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}
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// Read sensor's data
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bool readData(uint16_t data[], unsigned char data_count) {
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do {
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int avail = _serial->available();
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#if SENSOR_DEBUG
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//debugSend("[SENSOR] PMS: Packet available = %d\n", avail);
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#endif
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if (avail < PMS_PACKET_SIZE(data_count)) {
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break;
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}
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if (_serial->read() == 0x42 && _serial->read() == 0x4D) {
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uint16_t sum = 0x42 + 0x4D;
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uint16_t size = read16(sum);
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if (size != PMS_PAYLOAD_SIZE(data_count)) {
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#if SENSOR_DEBUG
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debugSend(("[SENSOR] PMS: Payload size: %d != %d.\n"), size, PMS_PAYLOAD_SIZE(data_count));
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#endif
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break;
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}
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for (int i = 0; i < data_count; i++) {
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data[i] = read16(sum);
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#if SENSOR_DEBUG
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//debugSend(("[SENSOR] PMS: data[%d] = %d\n"), i, data[i]);
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#endif
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}
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uint16_t checksum = read16();
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if (sum == checksum) {
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return true;
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} else {
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#if SENSOR_DEBUG
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debugSend(("[SENSOR] PMS checksum: %04X != %04X\n"), sum, checksum);
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#endif
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}
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break;
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}
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} while (true);
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return false;
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}
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private:
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// Read 16-bit
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inline uint16_t read16() {
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return ((uint16_t) _serial->read()) << 8 | _serial->read();
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}
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// Read 16-bit and calculate checksum
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uint16_t read16(uint16_t &checksum) {
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uint8_t high = _serial->read();
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uint8_t low = _serial->read();
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checksum += high;
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checksum += low;
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return ((uint16_t) high) << 8 | low;
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}
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};
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class PMSX003Sensor : public BaseSensor, PMSX003 {
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public:
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// ---------------------------------------------------------------------
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// Public
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// ---------------------------------------------------------------------
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PMSX003Sensor(): BaseSensor() {
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_count = pms_specs[_type].slot_count;
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_sensor_id = SENSOR_PMSX003_ID;
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}
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~PMSX003Sensor() {
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if (_serial) delete _serial;
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}
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void setRX(unsigned char pin_rx) {
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if (_pin_rx == pin_rx) return;
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_pin_rx = pin_rx;
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_dirty = true;
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}
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void setTX(unsigned char pin_tx) {
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if (_pin_tx == pin_tx) return;
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_pin_tx = pin_tx;
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_dirty = true;
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}
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void setSerial(HardwareSerial * serial) {
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_soft = false;
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_serial = serial;
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_dirty = true;
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}
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// Should call setType after constructor immediately to enable corresponding slot count
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void setType(unsigned char type) {
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_type = type;
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_count = pms_specs[_type].slot_count;
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}
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// ---------------------------------------------------------------------
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unsigned char getRX() {
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return _pin_rx;
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}
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unsigned char getTX() {
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return _pin_tx;
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}
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unsigned char getType() {
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return _type;
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}
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// ---------------------------------------------------------------------
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// Sensor API
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// ---------------------------------------------------------------------
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// Initialization method, must be idempotent
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void begin() {
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if (!_dirty) return;
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if (_soft) {
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if (_serial) delete _serial;
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_serial = new SoftwareSerial(_pin_rx, _pin_tx, false, 64);
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static_cast<SoftwareSerial*>(_serial)->enableIntTx(false);
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}
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if (_soft) {
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static_cast<SoftwareSerial*>(_serial)->begin(PMS_BAUD_RATE);
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} else {
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static_cast<HardwareSerial*>(_serial)->begin(PMS_BAUD_RATE);
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}
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passiveMode();
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_startTime = millis();
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_ready = true;
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_dirty = false;
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}
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// Descriptive name of the sensor
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String description() {
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char buffer[28];
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if (_soft) {
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snprintf(buffer, sizeof(buffer), "%s @ SwSerial(%u,%u)", pms_specs[_type].name, _pin_rx, _pin_tx);
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} else {
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snprintf(buffer, sizeof(buffer), "%s @ HwSerial", pms_specs[_type].name);
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}
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return String(buffer);
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}
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// Descriptive name of the slot # index
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String slot(unsigned char index) {
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char buffer[36] = {0};
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if (_soft) {
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snprintf(buffer, sizeof(buffer), "%d @ %s @ SwSerial(%u,%u)", int(index + 1), pms_specs[_type].name, _pin_rx, _pin_tx);
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} else {
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snprintf(buffer, sizeof(buffer), "%d @ %s @ HwSerial", int(index + 1), pms_specs[_type].name);
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}
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return String(buffer);
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}
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// Address of the sensor (it could be the GPIO or I2C address)
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String address(unsigned char index) {
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char buffer[6];
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snprintf(buffer, sizeof(buffer), "%u:%u", _pin_rx, _pin_tx);
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return String(buffer);
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}
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// Type for slot # index
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unsigned char type(unsigned char index) {
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return pms_specs[_type].slot_types[index];
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}
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void pre() {
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if (millis() - _startTime < 30000) {
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_error = SENSOR_ERROR_WARM_UP;
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return;
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}
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_error = SENSOR_ERROR_OK;
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#if PMS_SMART_SLEEP
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unsigned int readCycle;
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if (_readCount++ > 30) {
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readCycle = _readCount % 30;
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if (readCycle == 0) {
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#if SENSOR_DEBUG
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debugSend("[SENSOR] %s: Wake up: %d\n", pms_specs[_type].name, _readCount);
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#endif
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wakeUp();
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return;
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} else if (readCycle == 1) {
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requestRead();
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} else if (readCycle > 6) {
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return;
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}
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} else {
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readCycle = -1;
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}
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#endif
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uint16_t data[PMS_DATA_MAX];
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if (readData(data, pms_specs[_type].data_count)) {
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if (_type == PMS_TYPE_5003ST) {
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_slot_values[0] = data[4];
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_slot_values[1] = (double)data[13] / 10;
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_slot_values[2] = (double)data[14] / 10;
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_slot_values[3] = (double)data[12] / 1000;
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} else if (_type == PMS_TYPE_5003T) {
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_slot_values[0] = data[4];
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_slot_values[1] = (double)data[10] / 10;
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_slot_values[2] = (double)data[11] / 10;
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} else {
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_slot_values[0] = data[3];
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_slot_values[1] = data[4];
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_slot_values[2] = data[5];
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}
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}
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#if PMS_SMART_SLEEP
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if (readCycle == 6) {
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sleep();
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#if SENSOR_DEBUG
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debugSend("[SENSOR] %s: Enter sleep mode: %d\n", pms_specs[_type].name, _readCount);
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#endif
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return;
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}
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#endif
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requestRead();
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}
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// Current value for slot # index
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double value(unsigned char index) {
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return _slot_values[index];
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}
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protected:
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bool _soft = true;
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unsigned int _pin_rx;
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unsigned int _pin_tx;
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unsigned long _startTime;
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unsigned char _type = PMS_TYPE_X003;
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double _slot_values[PMS_SLOT_MAX] = {0};
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#if PMS_SMART_SLEEP
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unsigned int _readCount = 0;
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#endif
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};
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#endif // SENSOR_SUPPORT && PMS_SUPPORT
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