Connecting PMS5003 with Nodemcu esp32, Also how to know the used microcontoller can power all sensors with no problems

Using Arduino IDE 1.x
1

I have find this code in internet but it says Serial2 was not declared in this scope

This is the code:

#include <Arduino.h>
#include "PMS.h"
 
#define PMS_SET_PIN 26U
#define PMS_RST_PIN 25U
#define PMS_READ_INTERVAL 9U
#define PMS_READ_DELAY 1U
uint8_t pms_tick_count = PMS_READ_INTERVAL;
PMS pms(Serial2);
 
/***************************************************/
static void setup_pins(void) {
  pinMode(PMS_RST_PIN, OUTPUT);
  digitalWrite(PMS_RST_PIN, HIGH);
  pinMode(PMS_SET_PIN, OUTPUT);
  digitalWrite(PMS_SET_PIN, HIGH);
}
 
/***************************************************/
static void toggle_set(bool sleep) {
  if (sleep) {
    digitalWrite(PMS_SET_PIN, LOW);
  } else {
    digitalWrite(PMS_SET_PIN, HIGH);
  }
  delay(500U);
}
 
/***************************************************/
static void toggle_reset(void) {
  digitalWrite(PMS_RST_PIN, LOW);
  delay(500U);
  digitalWrite(PMS_RST_PIN, HIGH);
  delay(500U);
}
 
/***************************************************/
bool pms5003_init(void) {
  setup_pins();
  Serial2.begin(PMS::BAUD_RATE, SERIAL_8N1, 16U, 17U);
  delay(1000U);
  pms_tick_count = PMS_READ_INTERVAL;
  return true;
}
 
/***************************************************/
bool pms5003_read(uint16_t *pmSp1_0, uint16_t *pmSp2_5, uint16_t *pmSp10_0,
                  uint16_t *pmAe1_0, uint16_t *pmAe2_5, uint16_t *pmAe10_0) {
  bool result = false;
 
  if ((NULL == pmSp1_0) || (NULL == pmSp2_5) || (NULL == pmSp10_0)
  || (NULL == pmAe1_0) || (NULL == pmAe2_5) || (NULL == pmAe10_0)) {
    result = false;
  }
  else {
    pms_tick_count++;
    if (pms_tick_count == PMS_READ_DELAY) {
      PMS::DATA data;
      while (Serial2.available())
      {
        Serial2.read();
      }
 
      if (pms.readUntil(data, 2U*PMS::SINGLE_RESPONSE_TIME))
      {
        *pmSp1_0 = data.PM_AE_UG_1_0;
        *pmSp2_5 = data.PM_AE_UG_2_5;
        *pmSp10_0 = data.PM_AE_UG_10_0;
        *pmAe1_0 = data.PM_SP_UG_1_0;
        *pmAe2_5 = data.PM_SP_UG_2_5;
        *pmAe1_0 = data.PM_SP_UG_10_0;
        result = true;
      }
      else
      {
        toggle_reset();
      }
      toggle_set(true);
    } else if (pms_tick_count >= PMS_READ_INTERVAL) {
      toggle_set(false);
      pms_tick_count = 0U;
    }
  }
 
  return result;
2

@astrofin I have saw part of your code in this link

Please, can you provide me with your wiring connection and your working code

3

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