Readme-en.md

Mercury200

---

Implementation of Mercury-200 power meter's exchange protocol. The commands.go file contains all implemented commands. Below is the list of commands with hex codes and corresponding functions in code.

reading commands

Code	Command	Function
21	Current time	GetCurrentTime
22	Power limit	GetPowerLimit
23	Energy limit	GetEnergyLimit
24	Seasonal time shift flag	GetSeasonSwitchFlag
25	Limits of manual correction	GetManualCorrectionAmount
27	Energy from last reset	GetEnergyFromReset
28	Firmware version	GetVersion
29	Voltage of builtin battery	GetBatteryVoltage
2A	Displayed values	GetTariffsDisplayOptions
2B	Last turnoff time	GetLastTurnOffTime
2C	Last standby time	GetLastTurnOnTime
2D	Impulse output operation mode	GetImpOutputOptions
2E	Number of tariffs	GetTariffsCount
2F	Serial number	GetSerial
30	Holidays	GetHolidays
32	Energy at month start time	GetEnergyAtMonthStart
61	Last case opening time	GetLastOpenedTime
62	Last case closing time	GetLastClosedTime
63	Instant values	GetInstants
66	Production date	GetProductionDate
67	Values displaying intervals	GetDisplayIntervals

writing commands

Code	Command	Function
2	Set current time	SetCurrentTime
3	Set power limit	SetPowerLimit
4	Set energy limit	SetEnergyLimit
5	Set seasonal time shift flag	SetSeasonSwitchFlag
6	Set manual correction limits	SetManualCorrectionAmount
7	Set impulse output operation mode	SetImpOutputOptions
9	Choose displayed values	SetTariffsDisplayOptions
0A	Set number of tariffs	SetTariffsCount
0D	Set displaying intervals	SetDisplayIntervals
10	Set holidays	SetHolidays

usage example

• get values of accumulated energy with tariffs breakdown at the start of 11th month

package main

import (
	"fmt"
	"mercury200/commands"
)

func main() {
	netNum := "266608"
	port := "COM5"
	timeOut := 5
	baudRate := 9600

	result, _ := commands.GetEnergyAtMonthStart(&netNum, &port, &timeOut, &baudRate, 11)
	fmt.Println(result)

	fmt.Printf("Tariff 1: %s kW\n", result.T1)
	fmt.Printf("Tariff 2: %s kW", result.T2)
}

$ go run main.go
&{0684.92 0342.65 000.0 000.0}
Tariff 1: 0684.92 kW
Tariff 2: 0342.65 kW