mirror of
https://github.com/IoTManagerProject/IoTManager.git
synced 2026-03-26 22:22:16 +03:00
316 lines
9.8 KiB
C++
316 lines
9.8 KiB
C++
#include "PZEMSensor.h"
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#include <stdio.h>
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#define REG_VOLTAGE 0x0000
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#define REG_CURRENT_L 0x0001
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#define REG_CURRENT_H 0X0002
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#define REG_POWER_L 0x0003
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#define REG_POWER_H 0x0004
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#define REG_ENERGY_L 0x0005
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#define REG_ENERGY_H 0x0006
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#define REG_FREQUENCY 0x0007
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#define REG_PF 0x0008
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#define REG_ALARM 0x0009
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#define CMD_RHR 0x03
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#define CMD_RIR 0X04
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#define CMD_WSR 0x06
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#define CMD_CAL 0x41
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#define CMD_REST 0x42
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#define WREG_ALARM_THR 0x0001
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#define WREG_ADDR 0x0002
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#define UPDATE_TIME 200
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#define RESPONSE_SIZE 32
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#define READ_TIMEOUT 100
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#define PZEM_BAUD_RATE 9600
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#define DEBUG
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// Debugging function;
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void printBuf(uint8_t *buffer, uint16_t len) {
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#ifdef DEBUG
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for (uint16_t i = 0; i < len; i++) {
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char temp[6];
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sprintf(temp, "%.2x ", buffer[i]);
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Serial.print(temp);
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}
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Serial.println();
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#endif
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}
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PZEMSensor::PZEMSensor(Stream *port, uint16_t addr) {
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_serial = port;
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_addr = addr;
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init();
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}
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PZEM_Info *PZEMSensor::values(bool &online) {
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// Update vales if necessary
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if (!refresh()) {
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_values = PZEM_Info();
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online = false;
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} else {
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online = true;
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}
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return &_values;
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}
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/*!
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* PZEM004Tv30::sendCmd8
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*
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* Prepares the 8 byte command buffer and sends
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*
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* @param[in] cmd - Command to send (position 1)
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* @param[in] rAddr - Register address (postion 2-3)
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* @param[in] val - Register value to write (positon 4-5)
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* @param[in] check - perform a simple read check after write
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*
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* @return success
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*/
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bool PZEMSensor::sendCmd8(uint8_t cmd, uint16_t rAddr, uint16_t val, bool check, uint16_t slave_addr) {
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uint8_t sendBuffer[8]; // Send buffer
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uint8_t respBuffer[8]; // Response buffer (only used when check is true)
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if ((slave_addr == 0xFFFF) ||
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(slave_addr < 0x01) ||
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(slave_addr > 0xF7)) {
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slave_addr = _addr;
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}
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sendBuffer[0] = slave_addr; // Set slave address
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sendBuffer[1] = cmd; // Set command
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sendBuffer[2] = (rAddr >> 8) & 0xFF; // Set high byte of register address
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sendBuffer[3] = (rAddr)&0xFF; // Set low byte =//=
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sendBuffer[4] = (val >> 8) & 0xFF; // Set high byte of register value
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sendBuffer[5] = (val)&0xFF; // Set low byte =//=
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setCRC(sendBuffer, 8); // Set CRC of frame
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_serial->write(sendBuffer, 8); // send frame
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if (check) {
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if (!recieve(respBuffer, 8)) { // if check enabled, read the response
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return false;
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}
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// Check if response is same as send
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for (uint8_t i = 0; i < 8; i++) {
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if (sendBuffer[i] != respBuffer[i])
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return false;
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}
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}
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return true;
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}
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bool PZEMSensor::setAddress(uint8_t addr) {
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if (addr < 0x01 || addr > 0xF7) // sanity check
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return false;
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// Write the new address to the address register
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if (!sendCmd8(CMD_WSR, WREG_ADDR, addr, true))
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return false;
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_addr = addr; // If successful, update the current slave address
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return true;
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}
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uint8_t PZEMSensor::getAddress() {
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return _addr;
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}
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bool PZEMSensor::setPowerAlarm(uint16_t watts) {
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if (watts > 25000) { // Sanitych check
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watts = 25000;
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}
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// Write the watts threshold to the Alarm register
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if (!sendCmd8(CMD_WSR, WREG_ALARM_THR, watts, true))
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return false;
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return true;
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}
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bool PZEMSensor::getPowerAlarm() {
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if (!refresh()) // Update vales if necessary
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return NAN; // Update did not work, return NAN
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return _values.alarms != 0x0000;
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}
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void PZEMSensor::init() {
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if (_addr < 0x01 || _addr > 0xF8) {
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// Sanity check of address
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_addr = PZEM_DEFAULT_ADDR;
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}
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// Set initial lastRed time so that we read right away
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_lastRead = 0;
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_lastRead -= UPDATE_TIME;
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}
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bool PZEMSensor::refresh() {
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static uint8_t response[25];
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if (_lastRead + UPDATE_TIME > millis()) {
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return true;
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}
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// Read 10 registers starting at 0x00 (no check)
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sendCmd8(CMD_RIR, 0x00, 0x0A, false);
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if (recieve(response, 25) != 25) { // Something went wrong
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return false;
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}
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// Update the current values
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_values.voltage = ((uint32_t)response[3] << 8 | // Raw voltage in 0.1V
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(uint32_t)response[4]) /
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10.0;
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_values.current = ((uint32_t)response[5] << 8 | // Raw current in 0.001A
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(uint32_t)response[6] |
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(uint32_t)response[7] << 24 |
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(uint32_t)response[8] << 16) /
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1000.0;
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_values.power = ((uint32_t)response[9] << 8 | // Raw power in 0.1W
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(uint32_t)response[10] |
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(uint32_t)response[11] << 24 |
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(uint32_t)response[12] << 16) /
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10.0;
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_values.energy = ((uint32_t)response[13] << 8 | // Raw Energy in 1Wh
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(uint32_t)response[14] |
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(uint32_t)response[15] << 24 |
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(uint32_t)response[16] << 16) /
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1000.0;
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_values.freq = ((uint32_t)response[17] << 8 | // Raw Frequency in 0.1Hz
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(uint32_t)response[18]) /
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10.0;
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_values.pf = ((uint32_t)response[19] << 8 | // Raw pf in 0.01
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(uint32_t)response[20]) /
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100.0;
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_values.alarms = ((uint32_t)response[21] << 8 | // Raw alarm value
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(uint32_t)response[22]);
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// Record current time as _lastRead
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_lastRead = millis();
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return true;
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}
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bool PZEMSensor::reset() {
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uint8_t buffer[] = {0x00, CMD_REST, 0x00, 0x00};
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uint8_t reply[5];
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buffer[0] = _addr;
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setCRC(buffer, 4);
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_serial->write(buffer, 4);
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uint16_t length = recieve(reply, 5);
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if (length == 0 || length == 5) {
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return false;
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}
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return true;
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}
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uint16_t PZEMSensor::recieve(uint8_t *resp, uint16_t len) {
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((SoftwareSerial *)_serial)->listen(); // Start software serial listen
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unsigned long startTime = millis(); // Start time for Timeout
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uint8_t index = 0; // Bytes we have read
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while ((index < len) && (millis() - startTime < READ_TIMEOUT)) {
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if (_serial->available() > 0) {
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uint8_t c = (uint8_t)_serial->read();
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resp[index++] = c;
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}
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}
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// Check CRC with the number of bytes read
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if (!checkCRC(resp, index)) {
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return 0;
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}
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return index;
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}
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bool PZEMSensor::checkCRC(const uint8_t *buf, uint16_t len) {
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if (len <= 2) // Sanity check
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return false;
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uint16_t crc = CRC16(buf, len - 2); // Compute CRC of data
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return ((uint16_t)buf[len - 2] | (uint16_t)buf[len - 1] << 8) == crc;
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}
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void PZEMSensor::setCRC(uint8_t *buf, uint16_t len) {
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if (len <= 2) // Sanity check
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return;
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uint16_t crc = CRC16(buf, len - 2); // CRC of data
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// Write high and low byte to last two positions
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buf[len - 2] = crc & 0xFF; // Low byte first
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buf[len - 1] = (crc >> 8) & 0xFF; // High byte second
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}
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// Pre computed CRC table
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static const uint16_t crcTable[] PROGMEM = {
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0X0000, 0XC0C1, 0XC181, 0X0140, 0XC301, 0X03C0, 0X0280, 0XC241,
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0XC601, 0X06C0, 0X0780, 0XC741, 0X0500, 0XC5C1, 0XC481, 0X0440,
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0XCC01, 0X0CC0, 0X0D80, 0XCD41, 0X0F00, 0XCFC1, 0XCE81, 0X0E40,
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0X0A00, 0XCAC1, 0XCB81, 0X0B40, 0XC901, 0X09C0, 0X0880, 0XC841,
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0XD801, 0X18C0, 0X1980, 0XD941, 0X1B00, 0XDBC1, 0XDA81, 0X1A40,
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0X1E00, 0XDEC1, 0XDF81, 0X1F40, 0XDD01, 0X1DC0, 0X1C80, 0XDC41,
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0X1400, 0XD4C1, 0XD581, 0X1540, 0XD701, 0X17C0, 0X1680, 0XD641,
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0XD201, 0X12C0, 0X1380, 0XD341, 0X1100, 0XD1C1, 0XD081, 0X1040,
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0XF001, 0X30C0, 0X3180, 0XF141, 0X3300, 0XF3C1, 0XF281, 0X3240,
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0X3600, 0XF6C1, 0XF781, 0X3740, 0XF501, 0X35C0, 0X3480, 0XF441,
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0X3C00, 0XFCC1, 0XFD81, 0X3D40, 0XFF01, 0X3FC0, 0X3E80, 0XFE41,
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0XFA01, 0X3AC0, 0X3B80, 0XFB41, 0X3900, 0XF9C1, 0XF881, 0X3840,
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0X2800, 0XE8C1, 0XE981, 0X2940, 0XEB01, 0X2BC0, 0X2A80, 0XEA41,
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0XEE01, 0X2EC0, 0X2F80, 0XEF41, 0X2D00, 0XEDC1, 0XEC81, 0X2C40,
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0XE401, 0X24C0, 0X2580, 0XE541, 0X2700, 0XE7C1, 0XE681, 0X2640,
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0X2200, 0XE2C1, 0XE381, 0X2340, 0XE101, 0X21C0, 0X2080, 0XE041,
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0XA001, 0X60C0, 0X6180, 0XA141, 0X6300, 0XA3C1, 0XA281, 0X6240,
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0X6600, 0XA6C1, 0XA781, 0X6740, 0XA501, 0X65C0, 0X6480, 0XA441,
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0X6C00, 0XACC1, 0XAD81, 0X6D40, 0XAF01, 0X6FC0, 0X6E80, 0XAE41,
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0XAA01, 0X6AC0, 0X6B80, 0XAB41, 0X6900, 0XA9C1, 0XA881, 0X6840,
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0X7800, 0XB8C1, 0XB981, 0X7940, 0XBB01, 0X7BC0, 0X7A80, 0XBA41,
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0XBE01, 0X7EC0, 0X7F80, 0XBF41, 0X7D00, 0XBDC1, 0XBC81, 0X7C40,
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0XB401, 0X74C0, 0X7580, 0XB541, 0X7700, 0XB7C1, 0XB681, 0X7640,
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0X7200, 0XB2C1, 0XB381, 0X7340, 0XB101, 0X71C0, 0X7080, 0XB041,
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0X5000, 0X90C1, 0X9181, 0X5140, 0X9301, 0X53C0, 0X5280, 0X9241,
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0X9601, 0X56C0, 0X5780, 0X9741, 0X5500, 0X95C1, 0X9481, 0X5440,
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0X9C01, 0X5CC0, 0X5D80, 0X9D41, 0X5F00, 0X9FC1, 0X9E81, 0X5E40,
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0X5A00, 0X9AC1, 0X9B81, 0X5B40, 0X9901, 0X59C0, 0X5880, 0X9841,
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0X8801, 0X48C0, 0X4980, 0X8941, 0X4B00, 0X8BC1, 0X8A81, 0X4A40,
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0X4E00, 0X8EC1, 0X8F81, 0X4F40, 0X8D01, 0X4DC0, 0X4C80, 0X8C41,
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0X4400, 0X84C1, 0X8581, 0X4540, 0X8701, 0X47C0, 0X4680, 0X8641,
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0X8201, 0X42C0, 0X4380, 0X8341, 0X4100, 0X81C1, 0X8081, 0X4040};
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uint16_t PZEMSensor::CRC16(const uint8_t *data, uint16_t len) {
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uint8_t nTemp; // CRC table index
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uint16_t crc = 0xFFFF; // Default value
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while (len--) {
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nTemp = *data++ ^ crc;
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crc >>= 8;
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crc ^= (uint16_t)pgm_read_word(&crcTable[nTemp]);
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}
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return crc;
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}
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bool PZEMSensor::search() {
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bool ret = false;
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static uint8_t response[7];
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for (uint16_t addr = 0x01; addr <= 0xF8; addr++) {
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sendCmd8(CMD_RIR, 0x00, 0x01, false, addr);
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if (recieve(response, 7) != 7) {
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// Something went wrong
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continue;
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} else {
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Serial.println("Pzem " + String(addr));
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ret = true;
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}
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}
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return ret;
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}
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