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Measure energy uptake from a smart meter with S0 interface (nodemcu12E with IR)
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#include <Arduino.h> | |
#include <ESP8266WiFi.h> | |
#include <PubSubClient.h> | |
const char *SSID = ""; | |
const char *PSK = ""; | |
const char *MQTT_BROKER = ""; | |
const char *INFLUXDB_USERNAME = ""; | |
const char *INFLUXDB_PASSWORD = ""; | |
WiFiClient espClient; | |
PubSubClient client(espClient); | |
int pin = D2; | |
volatile unsigned int pulse; | |
const float pulses_per_kwh = 2.285 * 10000; // had to introduce factor because no of pulses and real energy consumption did not match | |
const int interval = 300000; | |
int lastTick = 0; | |
int RESET_COUNTER = 0; | |
// https://community.blynk.cc/t/error-isr-not-in-iram/37426/20 | |
ICACHE_RAM_ATTR void count_pulse() | |
{ | |
pulse++; | |
} | |
void setup_wifi() | |
{ | |
delay(10); | |
Serial.println(); | |
Serial.print("Connecting to "); | |
Serial.println(SSID); | |
WiFi.begin(SSID, PSK); | |
while (WiFi.status() != WL_CONNECTED) | |
{ | |
delay(500); | |
Serial.print("."); | |
} | |
Serial.println(""); | |
Serial.println("WiFi connected"); | |
Serial.println("IP address: "); | |
Serial.println(WiFi.localIP()); | |
} | |
void reconnect() | |
{ | |
while (!client.connected()) | |
{ | |
Serial.print("Reconnecting..."); | |
if (!client.connect("ESP8266Client", INFLUXDB_USERNAME, INFLUXDB_PASSWORD)) | |
{ | |
Serial.print("failed, rc="); | |
Serial.print(client.state()); | |
Serial.println(" retrying in 5 seconds"); | |
delay(5000); | |
} | |
} | |
} | |
void setup() | |
{ | |
Serial.begin(9600); | |
pinMode(pin, INPUT_PULLUP); | |
attachInterrupt(digitalPinToInterrupt(pin), count_pulse, RISING); | |
setup_wifi(); | |
client.setServer(MQTT_BROKER, 1883); | |
} | |
void loop() | |
{ | |
unsigned long ms = millis(); | |
if (ms - lastTick > interval) | |
{ | |
if (!client.connected()) | |
{ | |
reconnect(); | |
} | |
client.loop(); | |
char msg[64] = {0}; | |
lastTick = ms; | |
snprintf(msg, sizeof(msg) - 1, "%f", | |
double(pulse) / double(pulses_per_kwh)); | |
client.publish("/home/energy/s0", msg); | |
pulse = 0; | |
} | |
} |
Author
anderl80
commented
Sep 5, 2019
•
- https://de.wikipedia.org/wiki/S0-Schnittstelle
- https://wiki.volkszaehler.org/misc/s0_schnittstelle
- https://andihopfgartner.wordpress.com/2019/09/05/smart-meter-the-sensor-integrated-in-home-assistant/
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