From 063907e03a172e852a70d3a833e1c0428ad9ac82 Mon Sep 17 00:00:00 2001 From: Flip Date: Sun, 24 Jun 2018 23:06:27 +0200 Subject: [PATCH] Initial commit --- .gitignore | 32 +++ LICENSE | 674 ++++++++++++++++++++++++++++++++++++++++++++ README.md | 27 ++ esp8266_p1meter.ino | 469 ++++++++++++++++++++++++++++++ settings.h | 47 +++ 5 files changed, 1249 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 README.md create mode 100644 esp8266_p1meter.ino create mode 100644 settings.h diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..259148f --- /dev/null +++ b/.gitignore @@ -0,0 +1,32 @@ +# Prerequisites +*.d + +# Compiled Object files +*.slo +*.lo +*.o +*.obj + +# Precompiled Headers +*.gch +*.pch + +# Compiled Dynamic libraries +*.so +*.dylib +*.dll + +# Fortran module files +*.mod +*.smod + +# Compiled Static libraries +*.lai +*.la +*.a +*.lib + +# Executables +*.exe +*.out +*.app diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..9cecc1d --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + {project} Copyright (C) {year} {fullname} + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..4ef810e --- /dev/null +++ b/README.md @@ -0,0 +1,27 @@ +# esp8266_p1meter + +Software for the ESP2866 that sends P1 smart meter data to an mqtt broker (with CRC checking and OTA firmware updates) + +### Connection of the P1 meter to the ESP8266 + +| ESP8266 Pin | P1 Pin | +| ---- | ---- | +| GND | GND | +| 3V3 | RTS | +| DATA (RXD) | D2 | + +To connect my Landys and Gyr E350 (ZCF110), I used a 10K resistor connected between DATA (RXD) and RTS. +Many howto's mention RTS requires 5V (VIN) to activate the P1 port, but for me 3V3 suffices. + +![RJ11 P1 connetor](http://gejanssen.com/howto/Slimme-meter-uitlezen/RJ11-pinout.png) + + +## Thanks to + +This sketch is mostly copied and pasted from several other projects. +Standing on the heads of giants, big thanks and great respect to: + +- https://github.com/jantenhove/P1-Meter-ESP8266 +- https://github.com/neographikal/P1-Meter-ESP8266-MQTT +- http://romix.macuser.nl/software.html + diff --git a/esp8266_p1meter.ino b/esp8266_p1meter.ino new file mode 100644 index 0000000..9b8d3ff --- /dev/null +++ b/esp8266_p1meter.ino @@ -0,0 +1,469 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +// * Include settings +#include "settings.h" + +// * Initiate led blinker library +Ticker ticker; + +// * Initiate WIFI client +WiFiClient espClient; + +// * Initiate MQTT client +PubSubClient mqtt_client(espClient); + +// * Initiate Software Serial +SoftwareSerial p1_serial(P1_SERIAL_RX, -1, true, P1_MAXLINELENGTH); // (RX, TX. inverted, buffer) + + +// ********************************** +// * WIFI * +// ********************************** + +// * Gets called when WiFiManager enters configuration mode +void configModeCallback(WiFiManager *myWiFiManager) { + Serial.println(F("Entered config mode")); + Serial.println(WiFi.softAPIP()); + + // * If you used auto generated SSID, print it + Serial.println(myWiFiManager->getConfigPortalSSID()); + + // * Entered config mode, make led toggle faster + ticker.attach(0.2, tick); +} + +// ********************************** +// * Ticker (System LED Blinker) * +// ********************************** + +// * Blink on-board Led +void tick() { + // * Toggle state + int state = digitalRead(LED_BUILTIN); // * Get the current state of GPIO1 pin + digitalWrite(LED_BUILTIN, !state); // * Set pin to the opposite state +} + +// ********************************** +// * MQTT * +// ********************************** + +// * Send a message to a broker topic +void send_mqtt_message(const char *topic, char *payload) { + Serial.printf("MQTT Outgoing on %s: ", topic); + Serial.println(payload); + + bool result = mqtt_client.publish(topic, payload, false); + + if (!result) + { + Serial.printf("MQTT publish to topic %s failed\n", topic); + } +} + +// * Reconnect to MQTT server and subscribe to in and out topics +bool mqtt_reconnect() { + // * Loop until we're reconnected + int MQTT_RECONNECT_RETRIES = 0; + + while (!mqtt_client.connected() && MQTT_RECONNECT_RETRIES < MQTT_MAX_RECONNECT_TRIES) { + MQTT_RECONNECT_RETRIES++; + Serial.printf("MQTT connection attempt %d / %d ...\n", MQTT_RECONNECT_RETRIES, MQTT_MAX_RECONNECT_TRIES); + + // * Attempt to connect + if (mqtt_client.connect(HOSTNAME, MQTT_USER, MQTT_PASS)) { + Serial.println(F("MQTT connected!")); + + // * Once connected, publish an announcement... + char *message = new char[16 + strlen(HOSTNAME) + 1]; + strcpy(message, "p1 meter alive: "); + strcat(message, HOSTNAME); + mqtt_client.publish("hass/status", message); + + Serial.printf("MQTT root topic: %s\n", MQTT_ROOT_TOPIC); + } + else { + Serial.print(F("MQTT Connection failed: rc=")); + Serial.println(mqtt_client.state()); + Serial.println(F(" Retrying in 5 seconds")); + Serial.println(""); + + // * Wait 5 seconds before retrying + delay(5000); + } + } + + if (MQTT_RECONNECT_RETRIES >= MQTT_MAX_RECONNECT_TRIES) { + Serial.printf("*** MQTT connection failed, giving up after %d tries ...\n", MQTT_RECONNECT_RETRIES); + return false; + } + + return true; +} + + +void send_metric(String name, long metric) { + Serial.print("Sending metric to broker: "); + Serial.print(name); + Serial.print("="); + Serial.println(metric); + + char output[10]; + ltoa(metric, output, sizeof(output)); + + String topic = String(MQTT_ROOT_TOPIC) + "/" + name; + send_mqtt_message(topic.c_str(), output); + + // TODO - Add influxdb +} + +void send_data_to_broker() { + send_metric("consumption_low_tarif", CONSUMPTION_LOW_TARIF); + send_metric("consumption_high_tarif", CONSUMPTION_HIGH_TARIF); + send_metric("actual_consumption", ACTUAL_CONSUMPTION); + send_metric("instant_power_usage", INSTANT_POWER_USAGE); + send_metric("instant_power_current", INSTANT_POWER_CURRENT); + send_metric("gas_meter_m3", GAS_METER_M3); +} + +// ********************************** +// * P1 * +// ********************************** + +long getValue(char *buffer, int maxlen) { + + int s = FindCharInArrayRev(buffer, '(', maxlen - 2); + if (s < 8) return 0; + if (s > 32) s = 32; + + int l = FindCharInArrayRev(buffer, '*', maxlen - 2) - s - 1; + if (l < 2) return 0; + if (l > 12) return 0; + + char res[16]; + memset(res, 0, sizeof(res)); + + if (strncpy(res, buffer + s + 1, l)) { + if (isNumber(res, l)) return (1000 * atof(res)); + } + return 0; +} + +int FindCharInArrayRev(char array[], char c, int len) { + for (int i = len - 1; i >= 0; i--) { + if (array[i] == c) return i; + } + return -1; +} + +bool isNumber(char *res, int len) { + for (int i = 0; i < len; i++) { + if (((res[i] < '0') || (res[i] > '9')) && (res[i] != '.' && res[i] != 0)) + return false; + } + return true; +} + +bool decode_telegram(int len) { + //need to check for start + int startChar = FindCharInArrayRev(telegram, '/', len); + int endChar = FindCharInArrayRev(telegram, '!', len); + bool endOfMessage = false; + + if (endChar >= 0) { + endOfMessage = true; + } + + for (int cnt = 0; cnt < len; cnt++) + Serial.print(telegram[cnt]); + + // 1-0:1.8.1(000992.992*kWh) + // 1-0:1.8.1 = Elektra verbruik laag tarief (DSMR v4.0) + if (strncmp(telegram, "1-0:1.8.1", strlen("1-0:1.8.1")) == 0) { + CONSUMPTION_LOW_TARIF = getValue(telegram, len); + } + + // 1-0:1.8.2(000560.157*kWh) + // 1-0:1.8.2 = Elektra verbruik hoog tarief (DSMR v4.0) + if (strncmp(telegram, "1-0:1.8.2", strlen("1-0:1.8.2")) == 0) { + CONSUMPTION_HIGH_TARIF = getValue(telegram, len); + } + + // 1-0:1.7.0(00.424*kW) Actueel verbruik + // 1-0:2.7.0(00.000*kW) Actuele teruglevering + // 1-0:1.7.x = Electricity consumption actual usage (DSMR v4.0) + if (strncmp(telegram, "1-0:1.7.0", strlen("1-0:1.7.0")) == 0) { + ACTUAL_CONSUMPTION = getValue(telegram, len); + } + + // 1-0:21.7.0(00.378*kW) + // 1-0:21.7.0 = Instantaan vermogen Elektriciteit levering + if (strncmp(telegram, "1-0:21.7.0", strlen("1-0:21.7.0")) == 0) { + INSTANT_POWER_USAGE = getValue(telegram, len); + } + + // 1-0:31.7.0(002*A) + // 1-0:31.7.0 = Instantane stroom Elektriciteit + if (strncmp(telegram, "1-0:31.7.0", strlen("1-0:31.7.0")) == 0) { + INSTANT_POWER_CURRENT = getValue(telegram, len); + } + + // 0-1:24.2.1(150531200000S)(00811.923*m3) + // 0-1:24.2.1 = Gas (DSMR v4.0) on Kaifa MA105 meter + if (strncmp(telegram, "0-1:24.2.1", strlen("0-1:24.2.1")) == 0) { + GAS_METER_M3 = getValue(telegram, len); + } + + return endOfMessage; +} + +void read_p1_serial() { + if (p1_serial.available()) { + memset(telegram, 0, sizeof(telegram)); + + while (p1_serial.available()) { + int len = p1_serial.readBytesUntil('\n', telegram, P1_MAXLINELENGTH); + telegram[len] = '\n'; + telegram[len + 1] = 0; + yield(); + + bool result = decode_telegram(len + 1); + if (result) { + send_data_to_broker(); + } + } + } +} + +// ********************************** +// * EEPROM helpers * +// ********************************** + +String read_eeprom(int offset, int len) { + String res = ""; + + for (int i = 0; i < len; ++i) { + res += char(EEPROM.read(i + offset)); + } + + Serial.print(F("read_eeprom(): ")); + Serial.println(res.c_str()); + return res; +} + +void write_eeprom(int offset, int len, String value) { + Serial.print(F("write_eeprom(): ")); + Serial.println(value.c_str()); + for (int i = 0; i < len; ++i) { + if ((unsigned)i < value.length()) { + EEPROM.write(i + offset, value[i]); + } else { + EEPROM.write(i + offset, 0); + } + } +} + +// ****************************************** +// * Callback for saving WIFI config * +// ****************************************** + +bool shouldSaveConfig = false; + +// * Callback notifying us of the need to save config +void save_wifi_config_callback () { + Serial.println(F("Should save config")); + shouldSaveConfig = true; +} + +// ********************************** +// * Setup OTA * +// ********************************** + +void setup_ota() { + Serial.println(F("Arduino OTA activated.")); + + // * Port defaults to 8266 + ArduinoOTA.setPort(8266); + + // * Set hostname for OTA + ArduinoOTA.setHostname(HOSTNAME); + ArduinoOTA.setPassword(OTA_PASSWORD); + + ArduinoOTA.onStart([]() { + Serial.println(F("Arduino OTA: Start")); + }); + + ArduinoOTA.onEnd([]() { + Serial.println(F("Arduino OTA: End (Running reboot)")); + }); + + ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) { + Serial.printf("Arduino OTA Progress: %u%%\r", (progress / (total / 100))); + }); + + ArduinoOTA.onError([](ota_error_t error) { + Serial.printf("Arduino OTA Error[%u]: ", error); + if (error == OTA_AUTH_ERROR) + Serial.println(F("Arduino OTA: Auth Failed")); + else if (error == OTA_BEGIN_ERROR) + Serial.println(F("Arduino OTA: Begin Failed")); + else if (error == OTA_CONNECT_ERROR) + Serial.println(F("Arduino OTA: Connect Failed")); + else if (error == OTA_RECEIVE_ERROR) + Serial.println(F("Arduino OTA: Receive Failed")); + else if (error == OTA_END_ERROR) + Serial.println(F("Arduino OTA: End Failed")); + }); + + ArduinoOTA.begin(); + Serial.println(F("Arduino OTA finished")); +} + +// ********************************** +// * Setup MDNS discovery service * +// ********************************** + +void setup_mdns() { + Serial.println(F("Starting MDNS responder service")); + + bool mdns_result = MDNS.begin(HOSTNAME); + if (mdns_result) { + MDNS.addService("http", "tcp", 80); + } +} + +// ********************************** +// * Setup Main * +// ********************************** + +void setup() { + // * Configure Serial and EEPROM + Serial.begin(BAUD_RATE); + EEPROM.begin(512); + + // * Set led pin as output + pinMode(LED_BUILTIN, OUTPUT); + + // * Start ticker with 0.5 because we start in AP mode and try to connect + ticker.attach(0.6, tick); + + // * Start software serial for p1 meter + p1_serial.begin(BAUD_RATE); + + // * Get MQTT Server settings + String settings_available = read_eeprom(134, 1); + + if (settings_available == "1") { + read_eeprom(0, 64).toCharArray(MQTT_HOST, 64); // * 0-63 + read_eeprom(64, 6).toCharArray(MQTT_PORT, 6); // * 64-69 + read_eeprom(70, 32).toCharArray(MQTT_USER, 32); // * 70-101 + read_eeprom(102, 32).toCharArray(MQTT_PASS, 32); // * 102-133 + } + + WiFiManagerParameter CUSTOM_MQTT_HOST("host", "MQTT hostname", MQTT_HOST, 64); + WiFiManagerParameter CUSTOM_MQTT_PORT("port", "MQTT port", MQTT_PORT, 6); + WiFiManagerParameter CUSTOM_MQTT_USER("user", "MQTT user", MQTT_USER, 32); + WiFiManagerParameter CUSTOM_MQTT_PASS("pass", "MQTT pass", MQTT_PASS, 32); + + // * WiFiManager local initialization. Once its business is done, there is no need to keep it around + WiFiManager wifiManager; + + // * Reset settings - uncomment for testing + // wifiManager.resetSettings(); + + // * Set callback that gets called when connecting to previous WiFi fails, and enters Access Point mode + wifiManager.setAPCallback(configModeCallback); + + // * Set timeout + wifiManager.setConfigPortalTimeout(WIFI_TIMEOUT); + + // * Set save config callback + wifiManager.setSaveConfigCallback(save_wifi_config_callback); + + // * Add all your parameters here + wifiManager.addParameter(&CUSTOM_MQTT_HOST); + wifiManager.addParameter(&CUSTOM_MQTT_PORT); + wifiManager.addParameter(&CUSTOM_MQTT_USER); + wifiManager.addParameter(&CUSTOM_MQTT_PASS); + + // * Fetches SSID and pass and tries to connect + // * Reset when no connection after 10 seconds + if (!wifiManager.autoConnect()) { + Serial.println(F("Failed to connect to WIFI and hit timeout")); + + // * Reset and try again, or maybe put it to deep sleep + ESP.reset(); + delay(WIFI_TIMEOUT); + } + + // * Read updated parameters + strcpy(MQTT_HOST, CUSTOM_MQTT_HOST.getValue()); + strcpy(MQTT_PORT, CUSTOM_MQTT_PORT.getValue()); + strcpy(MQTT_USER, CUSTOM_MQTT_USER.getValue()); + strcpy(MQTT_PASS, CUSTOM_MQTT_PASS.getValue()); + + // * Save the custom parameters to FS + if (shouldSaveConfig) { + Serial.println(F("Saving WiFiManager config")); + + write_eeprom(0, 64, MQTT_HOST); // * 0-63 + write_eeprom(64, 6, MQTT_PORT); // * 64-69 + write_eeprom(70, 32, MQTT_USER); // * 70-101 + write_eeprom(102, 32, MQTT_PASS); // * 102-133 + write_eeprom(134, 1, "1"); // * 134 --> always "1" + EEPROM.commit(); + } + + // * If you get here you have connected to the WiFi + Serial.println(F("Connected to WIFI...")); + + // * Keep LED on + ticker.detach(); + digitalWrite(LED_BUILTIN, LOW); + + // * Configure OTA + setup_ota(); + + // * Startup MDNS Service + setup_mdns(); + + // * Setup MQTT + Serial.printf("MQTT connecting to: %s:%s\n", MQTT_HOST, MQTT_PORT); + + mqtt_client.setServer(MQTT_HOST, atoi(MQTT_PORT)); + +} + +// ********************************** +// * Loop * +// ********************************** + +void loop() { + ArduinoOTA.handle(); + + if (!mqtt_client.connected()) { + long now = millis(); + + if (now - LAST_RECONNECT_ATTEMPT > 5000) { + LAST_RECONNECT_ATTEMPT = now; + + if (mqtt_reconnect()) { + LAST_RECONNECT_ATTEMPT = 0; + } + } + } + else { + mqtt_client.loop(); + } + + read_p1_serial(); +} diff --git a/settings.h b/settings.h new file mode 100644 index 0000000..62ba339 --- /dev/null +++ b/settings.h @@ -0,0 +1,47 @@ +// ********************************** +// * Ledstrip Settings * +// ********************************** + +// * Baud rate for both hardware and software serial +#define BAUD_RATE 115200 + +// * P1 Meter RX pin +#define P1_SERIAL_RX D2 + +// * Max telegram length +#define P1_MAXLINELENGTH 64 + +// * The hostname of our little creature +#define HOSTNAME "p1meter" + +// * The password used for OTA +#define OTA_PASSWORD "admin" + +// * Wifi timeout in milliseconds +#define WIFI_TIMEOUT 30000 + +// * MQTT network settings +#define MQTT_MAX_RECONNECT_TRIES 10 + +// * MQTT root topic +#define MQTT_ROOT_TOPIC "sensors/power/p1meter" + +// * MQTT Last reconnection counter +long LAST_RECONNECT_ATTEMPT = 0; + +// * To be filled with EEPROM data +char MQTT_HOST[64] = ""; +char MQTT_PORT[6] = ""; +char MQTT_USER[32] = ""; +char MQTT_PASS[32] = ""; + +// * Set to store received telegram +char telegram[P1_MAXLINELENGTH]; + +// * Set to store the data read +long CONSUMPTION_LOW_TARIF; +long CONSUMPTION_HIGH_TARIF; +long ACTUAL_CONSUMPTION; +long INSTANT_POWER_CURRENT; +long INSTANT_POWER_USAGE; +long GAS_METER_M3;