From 1c40e0a2a1f43b61a0d7a6a015a4c8e5f94da240 Mon Sep 17 00:00:00 2001 From: Matthias Prinke <83612361+matthias-bs@users.noreply.github.com> Date: Mon, 10 Jul 2023 14:29:54 +0200 Subject: [PATCH] Added optional JSON output of floating point values as strings --- .../BresserWeatherSensorMQTTCustom.ino | 83 +++++++++++-------- 1 file changed, 49 insertions(+), 34 deletions(-) diff --git a/examples/BresserWeatherSensorMQTTCustom/BresserWeatherSensorMQTTCustom.ino b/examples/BresserWeatherSensorMQTTCustom/BresserWeatherSensorMQTTCustom.ino index a4a09d75..551fbf3c 100644 --- a/examples/BresserWeatherSensorMQTTCustom/BresserWeatherSensorMQTTCustom.ino +++ b/examples/BresserWeatherSensorMQTTCustom/BresserWeatherSensorMQTTCustom.ino @@ -27,7 +27,7 @@ // Based on: // arduino-mqtt Joël Gähwiler (256dpi) (https://github.com/256dpi/arduino-mqtt) // ArduinoJson by Benoit Blanchon (https://arduinojson.org) -// + // MQTT subscriptions: // - none - // @@ -83,11 +83,11 @@ // Added rain gauge statistics // Changed weatherSensor.getData() parameter 'flags' from DATA_ALL_SLOTS to DATA_COMPLETE // to provide data even if less sensors than expected (NUM_SENSORS) have been received. -// 20221024 Modified WeatherSensorCfg.h/WeatherSensor.h handling // 20221227 Replaced DEBUG_PRINT/DEBUG_PRINTLN by Arduino logging functions // 20230114 Fixed rain gauge update // 20230124 Improved WiFi connection robustness // 20230708 Changed MQTT payload and topic from char[] to String +// 20230710 Added optional JSON output of floating point values as strings // // ToDo: // @@ -111,6 +111,7 @@ // BEGIN User specific options #define LED_EN // Enable LED indicating successful data reception #define LED_GPIO 2 // LED pin +#define NUM_SENSORS 1 // Number of sensors to be received #define TIMEZONE 1 // UTC + TIMEZONE #define PAYLOAD_SIZE 255 // maximum MQTT message size #define TOPIC_SIZE 60 // maximum MQTT topic size @@ -126,6 +127,16 @@ #define USE_SECUREWIFI // use secure WIFI //#define USE_WIFI // use non-secure WIFI +// See +// https://stackoverflow.com/questions/19554972/json-standard-floating-point-numbers +// and +// https://stackoverflow.com/questions/35709595/why-would-you-use-a-string-in-json-to-represent-a-decimal-number +// +// Summary: +// A string representation of a float (e.g. "temp_c":"21.5") is recommended if the value shall displayed with the specified number of decimals. +// Otherwise the float value can be output as a numerical value (e.g. "temp_c":21.5). +// +//#define JSON_FLOAT_AS_STRING // Enable to debug MQTT connection; will generate synthetic sensor data. //#define _DEBUG_MQTT_ @@ -149,6 +160,7 @@ #include #endif + #include #include #include @@ -158,6 +170,12 @@ #include "src/WeatherUtils.h" #include "src/RainGauge.h" +#if defined(JSON_FLOAT_AS_STRING) + #define JSON_FLOAT(x) String("\"") + x + String("\"") +#else + #define JSON_FLOAT(x) x +#endif + const char sketch_id[] = "BresserWeatherSensorMQTT 20230709"; // Map sensor IDs to Names @@ -176,21 +194,16 @@ SensorMap sensor_map[NUM_SENSORS] = { #include "secrets.h" #ifndef SECRETS - // Optionally copy everything between BEGIN secrets / END secrets to secrets.h - // Otherwise, leave secrets.h as an empty file and edit the contents below. + const char ssid[] = "WiFiSSID"; + const char pass[] = "WiFiPassword"; - // BEGIN secrets - #define SECRETS - const char ssid[] = "SSID"; - const char pass[] = "password"; - - #define HOSTNAME "BresserDomo" + #define HOSTNAME "ESPWeather" #define APPEND_CHIP_ID - const int MQTT_PORT = 8883; // typically 8883 with TLS / 1883 without TLS + #define MQTT_PORT 8883 // checked by pre-processor! const char MQTT_HOST[] = "xxx.yyy.zzz.com"; - const char MQTT_USER[] = ""; // leave blank if no credentials used - const char MQTT_PASS[] = ""; // leave blank if no credentials used + const char MQTT_USER[] = ""; // leave blank if no credentials used + const char MQTT_PASS[] = ""; // leave blank if no credentials used #ifdef CHECK_CA_ROOT static const char digicert[] PROGMEM = R"EOF( @@ -299,7 +312,6 @@ time_t now; void publishWeatherdata(bool complete = false); void mqtt_connect(void); - // // Wait for WiFi connection // @@ -317,7 +329,6 @@ void wifi_wait(int wifi_retries, int wifi_delay) } -// // Setup WiFi in Station Mode // void mqtt_setup(void) @@ -405,6 +416,7 @@ void messageReceived(String &topic, String &payload) */ + /*! \brief Publish weather data as MQTT message @@ -436,7 +448,7 @@ void publishWeatherdata(bool complete) } // Example: - // {"ch":0,"battery_ok":1,"humidity":44,"wind_gust":"1.2","wind_avg":"1.2","wind_dir":150,"rain":146} + // {"ch":0,"battery_ok":1,"humidity":44,"wind_gust":1.2,"wind_avg":1.2,"wind_dir":150,"rain":146} mqtt_payload = "{"; mqtt_payload2 = "{"; mqtt_payload += String("\"id\":") + String(weatherSensor.sensor[i].sensor_id); @@ -445,15 +457,15 @@ void publishWeatherdata(bool complete) #endif mqtt_payload += String(",\"battery_ok\":") + (weatherSensor.sensor[i].battery_ok ? String("1") : String("0")); if (weatherSensor.sensor[i].temp_ok || complete) { - mqtt_payload += String(",\"temp_c\":") + String(weatherSensor.sensor[i].temp_c, 1); + mqtt_payload += String(",\"temp_c\":") + JSON_FLOAT(String(weatherSensor.sensor[i].temp_c, 1)); } if (weatherSensor.sensor[i].humidity_ok || complete) { mqtt_payload += String(",\"humidity\":") + String(weatherSensor.sensor[i].humidity); } if (weatherSensor.sensor[i].wind_ok || complete) { - mqtt_payload += String(",\"wind_gust\":") + String(weatherSensor.sensor[i].wind_gust_meter_sec, 1); - mqtt_payload += String(",\"wind_avg\":") + String(weatherSensor.sensor[i].wind_avg_meter_sec, 1); - mqtt_payload += String(",\"wind_dir\":") + String(weatherSensor.sensor[i].wind_direction_deg, 1); + mqtt_payload += String(",\"wind_gust\":") + JSON_FLOAT(String(weatherSensor.sensor[i].wind_gust_meter_sec, 1)); + mqtt_payload += String(",\"wind_avg\":") + JSON_FLOAT(String(weatherSensor.sensor[i].wind_avg_meter_sec, 1)); + mqtt_payload += String(",\"wind_dir\":") + JSON_FLOAT(String(weatherSensor.sensor[i].wind_direction_deg, 1)); } if (weatherSensor.sensor[i].wind_ok) { char buf[4]; @@ -462,24 +474,25 @@ void publishWeatherdata(bool complete) mqtt_payload2 += String(",\"wind_avg_bft\":") + String(windspeed_ms_to_bft(weatherSensor.sensor[i].wind_avg_meter_sec)); } if ((weatherSensor.sensor[i].temp_ok) && (weatherSensor.sensor[i].humidity_ok)) { - mqtt_payload2 += String(",\"dewpoint_c\":") + String(calcdewpoint(weatherSensor.sensor[i].temp_c, weatherSensor.sensor[i].humidity), 1); + mqtt_payload2 += String(",\"dewpoint_c\":") + + JSON_FLOAT(String(calcdewpoint(weatherSensor.sensor[i].temp_c, weatherSensor.sensor[i].humidity), 1)); if (weatherSensor.sensor[i].wind_ok) { mqtt_payload2 += String(",\"perceived_temp_c\":") - + String(perceived_temperature(weatherSensor.sensor[i].temp_c, weatherSensor.sensor[i].wind_avg_meter_sec, weatherSensor.sensor[i].humidity), 1); + + JSON_FLOAT(String(perceived_temperature(weatherSensor.sensor[i].temp_c, weatherSensor.sensor[i].wind_avg_meter_sec, weatherSensor.sensor[i].humidity), 1)); } } if (weatherSensor.sensor[i].uv_ok || complete) { - mqtt_payload += String(",\"uv\":") + String(weatherSensor.sensor[i].uv, 1); + mqtt_payload += String(",\"uv\":") + JSON_FLOAT(String(weatherSensor.sensor[i].uv, 1)); } if (weatherSensor.sensor[i].light_ok || complete) { - mqtt_payload += String(",\"light_klx\":") + String(weatherSensor.sensor[i].light_klx, 1); + mqtt_payload += String(",\"light_klx\":") + JSON_FLOAT(String(weatherSensor.sensor[i].light_klx, 1)); } if (weatherSensor.sensor[i].rain_ok || complete) { - mqtt_payload += String(",\"rain\":") + String(weatherSensor.sensor[i].rain_mm, 1); - mqtt_payload += String(",\"rain_d\":") + String(rainGauge.currentDay(), 1); - mqtt_payload += String(",\"rain_w\":") + String(rainGauge.currentWeek(), 1); - mqtt_payload += String(",\"rain_m\":") + String(rainGauge.currentMonth(), 1); + mqtt_payload += String(",\"rain\":") + JSON_FLOAT(String(weatherSensor.sensor[i].rain_mm, 1)); + mqtt_payload += String(",\"rain_d\":") + JSON_FLOAT(String(rainGauge.currentDay(), 1)); + mqtt_payload += String(",\"rain_w\":") + JSON_FLOAT(String(rainGauge.currentWeek(), 1)); + mqtt_payload += String(",\"rain_m\":") + JSON_FLOAT(String(rainGauge.currentMonth(), 1)); } if (weatherSensor.sensor[i].moisture_ok || complete) { mqtt_payload += String(",\"moisture\":") + String(weatherSensor.sensor[i].moisture); @@ -546,7 +559,7 @@ void publishRadio(void) payload["rssi"] = weatherSensor.rssi; serializeJson(payload, mqtt_payload); - Serial.printf("%s: %s\n", mqttPubRadio, mqtt_payload); + log_i("%s: %s\n", mqttPubRadio, mqtt_payload); client.publish(mqttPubRadio, mqtt_payload, false, 0); payload.clear(); } @@ -669,11 +682,13 @@ void loop() { // Go to sleep only after complete set of data has been sent if (SLEEP_EN && (decode_ok || force_sleep)) { - if (force_sleep) { - log_d("Awake time-out!"); - } else { - log_d("Data forwarding completed."); - } + #ifdef _DEBUG_MODE_ + if (force_sleep) { + Serial.println(F("Awake time-out!")); + } else { + Serial.println(F("Data forwarding completed.")); + } + #endif Serial.printf("Sleeping for %d ms\n", SLEEP_INTERVAL); Serial.printf("%s: %s\n", mqttPubStatus, "offline"); Serial.flush();